ned_dxcauses.pdf

GSM/EDGE BSS, Rel.RG30(BSS), Operating Documentation, Issue 03 Reference Call Related DX Causes in BSC DN9814277 Issue 15-2 Approval Date 2011-09-23 Confidential Nokia Siemens Networks is continually striving to reduce the adverse environmental effects of its products and services. We would like to encourage you as our customers and users to join us in working towards a cleaner, safer environment. Please recycle product packaging and follow the recommendations for power use and proper disposal of our products and their components. If you should have questions regarding our Environmental Policy or any of the environmental services we offer, please contact us at Nokia Siemens Networks for any additional information. Call Related DX Causes in BSC The information in this document is subject to change without notice and describes only the product defined in the introduction of this documentation. 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Nokia is a registered trademark of Nokia Corporation. Siemens is a registered trademark of Siemens AG. Other product names mentioned in this document may be trademarks of their respective owners, and they are mentioned for identification purposes only. Copyright © Nokia Siemens Networks 2011. All rights reserved f Important Notice on Product Safety This product may present safety risks due to laser, electricity, heat, and other sources of danger. Only trained and qualified personnel may install, operate, maintain or otherwise handle this product and only after having carefully read the safety information applicable to this product. The safety information is provided in the Safety Information section in the “Legal, Safety and Environmental Information” part of this document or documentation set. The same text in German: f Wichtiger Hinweis zur Produktsicherheit Von diesem Produkt können Gefahren durch Laser, Elektrizität, Hitzeentwicklung oder andere Gefahrenquellen ausgehen. Installation, Betrieb, Wartung und sonstige Handhabung des Produktes darf nur durch geschultes und qualifiziertes Personal unter Beachtung der anwendbaren Sicherheitsanforderungen erfolgen. Die Sicherheitsanforderungen finden Sie unter „Sicherheitshinweise“ im Teil „Legal, Safety and Environmental Information“ dieses Dokuments oder dieses Dokumentationssatzes. 2 Id:0900d805808e4920 Confidential DN9814277 Call Related DX Causes in BSC Table of contents This document has 107 pages. Summary of changes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 DN9814277 1 Overview of call related DX causes in BSC . . . . . . . . . . . . . . . . . . . . . . . 6 2 Functionality of call related DX causes in BSC . . . . . . . . . . . . . . . . . . . . 7 3 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 Call phases of call related DX causes in BSC . . . . . . . . . . . . . . . . . . . . . 9 Paging/initial MS on CCCH (phase 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 MM signalling (phase 2). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Basic assignment (phase 3). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Release (phase 4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 FACCH assignment (phase 5) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 SMS establishment on TCH (phase 6) . . . . . . . . . . . . . . . . . . . . . . . . . 14 SMS establishment on SDCCH (phase 7) . . . . . . . . . . . . . . . . . . . . . . . 14 Ciphering (phase 8) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 External handover for source side (phase 9) . . . . . . . . . . . . . . . . . . . . . 16 Internal handover intra for source side (phase 10) . . . . . . . . . . . . . . . . 17 Internal handover inter for source side (phase 11) . . . . . . . . . . . . . . . . 17 External handover for target side (phase 12). . . . . . . . . . . . . . . . . . . . . 18 Internal handover intra for target side (phase 13) . . . . . . . . . . . . . . . . . 19 Internal handover inter for target side (phase 14) . . . . . . . . . . . . . . . . . 20 Conversation (phase 15) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 4 4.1 4.2 List of call related DX causes in BSC . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Success causes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Failure causes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 5 5.1 5.2 DX and BSSMAP cause mapping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47 DX causes mapped to BSSMAP causes . . . . . . . . . . . . . . . . . . . . . . . . 47 BSSMAP causes mapped to DX causes . . . . . . . . . . . . . . . . . . . . . . . . 56 6 6.1 6.2 6.3 6.4 6.5 DX causes DX causes DX causes DX causes DX causes DX causes in BSC statistics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . and BSC Level Clear Code Measurement . . . . . . . . . . . . . and BSC Level Clear Code (PM) Measurement . . . . . . . . . and BSC Level Clear Code (SERLEV) Measurement. . . . . and observation report. . . . . . . . . . . . . . . . . . . . . . . . . . . . . and Traffic Measurement. . . . . . . . . . . . . . . . . . . . . . . . . . . Id:0900d805808e4920 Confidential 67 67 67 68 68 68 3 . . . . 15 Ciphering (phase 8) . . . . . . . . . . . . . . . . . . . . . . . . 11 Basic assignment (phase 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Internal handover intra for target side (phase 13) . . . 16 Internal handover intra for source side (phase 10) . . . . . . . . . . . . 13 FACCH assignment (phase 5) . . . . . . . . . . . . . . . . . . . . . . 21 Id:0900d805808e4920 Confidential DN9814277 . . . . . . 18 External handover for target side (phase 12) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Internal handover inter for target side (phase 14) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 SMS establishment on TCH (phase 6) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 MM signalling (phase 2) . . . . 17 Internal handover inter for source side (phase 11) . . . . 15 External handover for source side (phase 9) . . . . . . . . . . . . 12 Release (phase 4). . . . . . . . . . 21 Conversation (phase 15). . . . . . . . . . . . . 14 SMS establishment on SDCCH (phase 7) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Call Related DX Causes in BSC List of figures Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9 Figure 10 Figure 11 Figure 12 Figure 13 Figure 14 Figure 15 4 Paging/initial MS on CCCH (phase 1). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Added the following new success cause: • intra_mcpa_pbho_tch_c (188) Changes made between issues 15-1 and 15-0 Added cause codes related to the feature BSS21534: OSC Full Rate with SAIC MS Added the following new success causes: • • • • intra_ho_from_fr_to_dfr_c (184) intra_dfr_rxqual_dmux_ho_c (185) intra_dfr_rxl_df_dmux_ho_c (186) intra_dfr_rxlev_dmux_ho_c (187) Changes made between issues 15-0 and 14-1 Added cause codes related to the features BSS21341: A over IP. Transcoder in BSS. Therefore. Changes made between issues 15-2 and 15-1 Added cause codes related to the feature BSS21507: Flexible MCPA TX Power Pooling.Call Related DX Causes in BSC Summary of changes Summary of changes Changes between document issues are cumulative. the latest document issue contains all changes made to previous issues. Transcoder in MGW and BSS21309: OSC Half Rate with SAIC and Packet Abis Added the following new success causes: • • • • • • intra_ho_from_hr_to_dhr_c (179) intra_ho_from_fr_to_dhr_c (180) intra_dhr_rxqual_dmux_ho_c (181) intra_rxlev_diff_dmux_ho_c (182) intra_dhr_rxlev_dmux_ho_c (183) inter_mss_trg_bss_int_ho_c (243) Added the following new failure causes: • • • • • • • • • • • • • • DN9814277 etp_failure_c (377) unavail_codec_type_conf_c (409) no_support_a_if_type_c (630) no_supp_redundancy_level_c (631) no_supp_codec_type_conf_c (632) unavail_a_if_type_c (633) t25_timer_expiry_c (634) call_id_alr_allocated_c (717) unavail_terr_resource_c (718) m_no_supp_codec_typ_conf_c (941) m_no_support_a_if_type_c (942) m_unavail_a_if_type_c (943) m_unavail_codec_typ_conf_c (944) m_no_supp_redundancy_lvl_c (945) Id:0900d805808e4922 Confidential 5 . BSS30380: A over IP. DX causes are conveyed within internal signalling messages and give more detailed information on the conditions inside the BSC than GSM-defined causes.Overview of call related DX causes in BSC Call Related DX Causes in BSC 1 Overview of call related DX causes in BSC All events that occur during a call have a cause. timer expiry cases. solve possible error situations and improve the quality of the network. DX causes describe how the network transactions have succeeded: they provide information on the causes of events such as call establishment. handovers. rejected messages sent to mobile stations and channel releases. internal faults. The information conveyed by the DX causes can be examined through the use of BSC measurements and observations. DX causes also include GSM causes when a network element other than the BSC initiates the clearing of a transaction. The causes can be coded in order to observe the transactions in the network. Cases that are not observed in the MSC can also be examined through the use of DX causes in BSC. Related topics • • • • • 6 Functionality of call related DX causes in BSC Call phases of call related DX causes in BSC List of call related DX causes in BSC DX and BSSMAP cause mapping DX causes in BSC statistics Id:0900d805805a24b5 Confidential DN9814277 . The DX cause is set by the program block that initiates the channel release.BSS) interface Layer 3 specification.008 Mobile Switching Centre . and inside the BSC. The BSC cannot observe these failures if the phase is MM signalling (2) or conversation (15).018 Mobile radio interface layer 3 specification. When the program block A detects a failure. Some failures result in call clearing. For more information on BTSM. It indicates the error that caused the channel release. If the failure occurs on layer 1 or 2. to program block B that is responsible for the phase during which the error occurred.Base Transceiver Station (BSC . such as failures during a handover. corrupted messages and other protocol errors. it can detect only some of the failures on that layer. Handling of DX causes DX causes are handled as follows: 1. For more information on BSSAP. The BSC is responsible for the following functional parts on layer 3: • • • base transceiver station management (BTSM) radio resource management (RR) base station system application part (BSSAP) BTSM and RR are parts of the Abis interface and BSSAP is a part of the A interface. DN9814277 Id:0900d805805a24b9 Confidential 7 . Failure detection The handling of a DX cause is located on GSM layer 3 and failures can be detected in the A interface. A success cause is set when the MS receives access to the network with a relevant establishment cause.Call Related DX Causes in BSC Functionality of call related DX causes in BSC 2 Functionality of call related DX causes in BSC Each DX cause element consists of the following information: • • the cause code that describes the event (see List of call related DX causes in BSC) a call phase that corresponds with a phase in the signalling scenario or procedure and defines when the event has occurred (see Call phases of call related DX causes in BSC). for example a timer expiry on the lower layer. see 3GPP TS 48. There are two types of DX causes: success causes and failure causes. the failure can be detected on layer 3 as a timer expiry or as different kinds of block causes. When another network element sends a clearing to the BSC. Since signalling on the mobility management (MM) layer is transparent to the BSC.058 Base Station Controller . Correspondingly. Abis interface. The rest of the failures can be seen as the release of the MSC. see 3GPP TS 48. it sets the cause and sends the appropriate message. because the BSC interprets this as a successful call. do not. This internal message includes the DX cause element.Base Station System (MSC .BTS) Interface Layer 3 specification. Such failures are. For more information on RR. or when a handover starts with a relevant handover setup cause. while others. a failure cause is set when a failure occurs during a call or a handover. it is transformed into a DX cause by the program block that receives the clearing indication. see 3GPP TS 44. either directly or through another program block. it sets the phase value in the DX cause element. It also updates the successful handover counters and sets the causes mainly for handover signalling failures. It sets the causes mainly for RC0PRB signalling failures. RRMPRB Radio Resource Management Program Block controls the use of the radio channels. SMS. internal intra and internal inter handover signalling. AIVPRB A Interface Signalling Program Block in BSC sets the causes mainly for A interface signalling failures. It also sets the causes for SC7PRB signalling failures. RC0PRB The main purpose of the Resource Control Program Block in BSC is to implement the interface between the marker and the call control program blocks of the BSC. The A interface is only responsible for setting the appropriate cause values.Functionality of call related DX causes in BSC Call Related DX Causes in BSC 2. such as a location update. In a conflict situation. The following program blocks are involved in the handling of DX causes: 8 ABIPRB Abis Interface Program Block is responsible for the normal call phases including basic call. HASPRB 3. an SMS or a call. The counter is updated only once during call signalling. When two different failures are in conflict. SC7PRB Speech Circuit Control in GSM BSC A Interface takes care of the administration of the A interface speech circuits. other program blocks The priority handling is implemented in the ABIPRB and the HASPRB. it also sets a flag in the DX cause element which indicates that the counter has already been updated. ciphering and FACCH call setup. Prioritisation of conflicting failures Since only one DX cause can be set for one transaction. as follows: 1. Id:0900d805805a24b9 Confidential DN9814277 . HASPRB Handover Attempt Supervisor Program Block is responsible for the handover phases including external. RCSPRB Radio Connection Supervision Program Block takes care of the preprocessing of the measurement samples. the program block that has the highest priority defines the appropriate failure cause. indicates whether a handover is required and performs supervision of the LAPD link by supervising the flow of measurement results coming from the BTS. the list of priorities is. only the first failure is generally set as the DX cause. It also updates the successful establishment counters and sets the causes mainly for Abis signalling failures. determines the RF output power of the MS and BTS. The program block also sets the failures that have occurred in RRMPRB signalling. 3. AIVPRB (because it also sets the cause of failure for the MSC) 2. When program block B receives the DX cause. When a program block responsible for updating the failure counter has performed the update. Conversation A phase is a stage of the GSM layer 3 call or handover signalling in the BSC. If a failure occurs. Release 5. 3. MM signalling 3.1 Paging/initial MS on CCCH (phase 1) This phase covers the starting signalling of the mobile originating and the mobile terminating call establishment. Ciphering 9. External handover for source side 10. External handover for target side 13. by the ABIPRB. The failure counter is updated by the RRMPRB (Radio Resource Management Program Block) or. the ABIPRB sets the establishment cause to the cause field of a DX cause element. SMS establishment on SDCCH 8. Internal handover inter for target side 15. All the telecom signalling scenarios can be present as described in the list above and their purpose is to identify a failure when it occurs.Call Related DX Causes in BSC Call phases of call related DX causes in BSC 3 Call phases of call related DX causes in BSC The call transactions are divided into 15 different phases. The ABIPRB is responsible for this phase. FACCH assignment 6. where the numbers from 1 to 15 represent the phase numbers in the observation report. DN9814277 Id:0900d805805a24bc Confidential 9 . When the MS gains access to the network. the success cause is overwritten with the failure cause and the signalling continues as call clearing. 1. Paging/initial MS on CCCH 2. for example. SMS establishment on TCH 7. Basic assignment 4. Internal handover intra for target side 14. Internal handover inter for source side 12. Internal handover intra for source side 11. The success cause is conveyed to the next phase if the signalling is finished successfully in this phase. The dedicated channel can be a stand-alone dedicated control channel (SDCCH) or a traffic channel (TCH). in some cases. The successful cause is received from the previous phase and conveyed further to the following phase. the successful cause is overwritten with the failure cause and the signalling continues as call clearing. The MM signalling occurring on an SDCCH or a TCH is transparent for the BSC. The ABIPRB is responsible for this phase. If a failure occurs. 10 Id:0900d805805a24bc Confidential DN9814277 .2 Paging/initial MS on CCCH (phase 1) MM signalling (phase 2) This phase covers the MM signalling between the mobile subscriber and the MSC. The RRMPRB updates the failure counter.Call phases of call related DX causes in BSC Call Related DX Causes in BSC BTS MS BSC MSC PAGING PAGING_COMMAND PAGING_REQUEST CHANNEL_REQUEST CHANNEL_REQUIRED CHANNEL_ACTIVATION CHANNEL_ACTIVATION_ACKNOWLEDGE IMMEDIATE_ASSIGNMENT_COMMAND IMMEDIATE_ASSIGNMENT SABM > ESTABLISH_INDICATION UA PAGING_RESPONSE AUTHENTICATION_REQUEST Figure 1 3. DN9814277 Id:0900d805805a24bc Confidential 11 . The RRMPRB updates the failure counter. If a failure occurs.Call Related DX Causes in BSC Call phases of call related DX causes in BSC Before Basic assignment phase MS BSC BTS MSC AUTHENTICATION_REQUEST AUTHENTICATION_REQUEST AUTHENTICATION_RESPONSE AUTHENTICATION_RESPONSE IDENTIFICATION_REQUEST IDENTIFICATION_REQUEST IDENTIFICATION_RESPONSE IDENTIFICATION_RESPONSE DATA_INDICATION DT1(set up) CALL_PROCEEDING CALL_PROCEEDING ASSIGNMENT_REQUEST After Basic assignment phase MS BTS BSC ALERT ALERT CONNECT CONNECT CONNECT_ACK Figure 2 3. The successful cause is received from the previous phase and conveyed further to the following phase. the successful cause is overwritten with the failure cause and the signalling continues as call clearing. The ABIPRB is responsible for this phase.3 MSC CONNECT_ACK MM signalling (phase 2) Basic assignment (phase 3) This phase covers the mobile subscriber assignment signalling from the SDCCH to the TCH by means of the Basic Call setup. When a CLEAR COMMAND is received from the MSC. 12 Id:0900d805805a24bc Confidential DN9814277 . for example. it updates the successful call and establishment counters according to the success DX cause for establishment.4 ALERT Basic assignment (phase 3) Release (phase 4) This phase covers the release on an SDCCH or a TCH. which was received from the previous phase. the AIVPRB sends information on a successful call release to the ABIPRB. The release is a normal one when the MSC releases the channel. Counters that measure the BSC service level are not updated. The ABIPRB is responsible for this phase. only one failure counter is updated. If a failure occurs during this phase. When ABIPRB receives this information. the AIVPRB knows that the release is either normal or abnormal. because failures in this phase do not affect the service of the MS. at the end of a location update or at the end of a call.Call phases of call related DX causes in BSC MS Call Related DX Causes in BSC BTS BSC MSC ASSIGNMENT_REQUEST PHYSICAL_CONTEXT_REQUEST PHYSICAL_CONTEXT_CONFIRM CHANNEL_ACTIVATION CHANNEL_ACTIVATION_ACK ASSIGNMENT_COMMAND ASSIGNMENT_COMMAND SABM > UA ESTABLISH_INDICATION > ASSIGNMENT_COMPLETE ASSIGNMENT_COMPLETE RF_CHANNEL_RELEASE RF_CHANNEL_RELEASE_ACK ALERT Figure 3 3. In a normal release. The ABIPRB is responsible for this phase. The successful cause is received from the previous phase and conveyed further to the following phase. The dedicated channel can only be a TCH. BTS MS BSC MSC ASSIGNMENT_REQUEST MODE_MODIFY_REQ MODE_MODIFY_ACK CH_MODE_MODIFICATION CH_MODE_MODIFICATION CH_MODE_MODIFY_ACK CH_MODE_MODIFY_ACK_S ASSIGNMENT_COMPLETE ALERT Figure 5 DN9814277 ALERT FACCH assignment (phase 5) Id:0900d805805a24bc Confidential 13 . If a failure occurs.5 Release (phase 4) FACCH assignment (phase 5) This phase covers the FACCH Call setup assignment signalling. The RRMPRB updates the failure counter.Call Related DX Causes in BSC Call phases of call related DX causes in BSC MS BTS BSC CHANNEL_RELEASE MSC CLEAR_COMMAND CLEAR_COMPLETE DEACTIVATE_SACCH DISC UA RELEASE_INDICATION RF_CHANNEL_RELEASE RF_CHANNEL_REL_ACK Figure 4 3. the successful cause is overwritten with the failure cause and the signalling continues as call clearing. The dedicated channel can only be a TCH. 14 Id:0900d805805a24bc Confidential DN9814277 . The successful cause is received from the previous phase and conveyed further to the following phase. If a failure occurs. The successful cause is received from the previous phase and conveyed further to the following phase. If a failure occurs. the successful cause is overwritten with the failure cause and the signalling continues as call clearing. the successful cause is overwritten with the failure cause and the signalling continues as call clearing.6 Call Related DX Causes in BSC SMS establishment on TCH (phase 6) This phase covers the SMS establishment signalling on a TCH. The ABIPRB is responsible for this phase. The dedicated channel can only be an SDCCH. The RRMPRB updates the failure counter.Call phases of call related DX causes in BSC 3. The ABIPRB is responsible for this phase. BTS MS BSC MSC DT1(CP_DATA) ESTABLISH_REQUEST SABM(SAPI=3) UA(SAPI=3) ESTABLISH_CONFIRM DATA_REQUEST(CP_DATA) DATA_INDICATION(CP_ACK) DT1(CP_ACK) DATA_INDICATION(CP_DATA) DT1(CP_DATA) DT1(CP_ACK) DATA_REQUEST(CP_ACK) Figure 6 3.7 SMS establishment on TCH (phase 6) SMS establishment on SDCCH (phase 7) This phase covers SDCCH SMS establishment. The RRMPRB updates the failure counter. the successful cause is overwritten with the failure cause and the signalling continues as call clearing. The RRMPRB updates the failure counter. If a failure occurs. MS BTS BSC MSC CIPHERING_MODE_COMMAND ENCRYPTION_COMMAND CIPHERING_MODE_COMMAND CIPHERING_MODE_COMPLETE CIPHERING_MODE_COMPLETE Figure 8 DN9814277 Ciphering (phase 8) Id:0900d805805a24bc Confidential 15 . The dedicated channel can be an SDCCH or a TCH. The successful cause is received from the previous phase and conveyed further to the following phase.8 SMS establishment on SDCCH (phase 7) Ciphering (phase 8) This phase covers ciphering signalling.Call Related DX Causes in BSC Call phases of call related DX causes in BSC MS BTS BSC MSC DT1(CP_DATA) ESTABLISH_REQUEST SABM(SAPI=3) UA(SAPI=3) ESTABLISH_CONFIRM DATA_REQUEST(CP_DATA) DATA_INDICATION(CP_ACK) DT1(CP_ACK) DATA_INDICATION(CP_DATA) DT1(CP_DATA) DT1(CP_ACK) DATA_REQUEST(CP_ACK) Figure 7 3. The ABIPRB is responsible for this phase. the HASPRB. If the handover conditions are met. The MSC indicates with a CLEAR COMMAND message that the signalling has finished successfully. It sends information on a successful call release forward. the HASPRB converts the cause for the appropriate type of handover. When the MSC sends a CLEAR COMMAND with the relevant failure cause. The RCSPRB decides on the basis of the results whether the handover is performed. in some cases. the AIVPRB knows if the clearing is normal and successful. the cause is converted into a DX cause and the RRMPRB updates the failure counter. The HASPRB is responsible for this phase. the success DX cause counter has been updated because the MS has been released immediately after the clear command. The MS and the BTS send the measurement results to the BSC. the RCSPRB sets the cause for the handover and sends the appropriate signalling message forward.9 Call Related DX Causes in BSC External handover for source side (phase 9) This phase covers the external handover signalling of the source side on an SDCCH and a TCH. If a failure occurs after the CLEAR COMMAND is received from the MSC. If a failure occurs before the CLEAR COMMAND is received from the MSC. When the BSC receives the CLEAR COMMAND. no failure counters are updated because the MS does not observe this kind of failure. the success cause is overwritten. The signalling continues as handover clearing and the failure counter is updated by the RRMPRB or. The HASPRB updates the successful handover counter and the ABIPRB updates the successful call and establishment counters with the success DX cause for establishment. MS BSC BTS MSC MEAS_REPORT MEAS_RESULT HO_REQUIRED HO_COMMAND HO_CMD HANDOVER_COMMAND CLEAR_COMMAND CLEAR_COMPLETE RF_CHANNEL_RELEASE RF_CHANNEL_RELEASE_ACK Figure 9 16 External handover for source side (phase 9) Id:0900d805805a24bc Confidential DN9814277 . Next. which was received from the previous phase. including the DX cause. The HASPRB checks the cause of the handover and decides that an external handover is to be made.Call phases of call related DX causes in BSC 3. The MS and the BTS send the measurement results to the BSC. the success cause is overwritten and the signalling continues as call clearing. On the target side. Next.Call Related DX Causes in BSC 3. It is taken into use on the target side after the handover signalling has finished successfully. If a failure occurs on the source side before the assignment command is received.10 Call phases of call related DX causes in BSC Internal handover intra for source side (phase 10) This phase covers the internal intra-cell handover signalling of the source side on an SDCCH and a TCH. MS BTS BSC MSC MEAS_REPORT MEAS_RESULT PHYSICAL_CONTEXT_REQUEST_S PHYSICAL_CONTEXT_CONFIRM_S ASSIGNMENT_COMMAND ASSIGNMENT_COMMAND RF_CHANNEL_RELEASE RF_CHANNEL_RELEASE_ACK Figure 10 3. The HASPRB updates the successful handover counter and the call continues as a normal call on the target side. When the handover conditions are met. the RRMPRB has updated the failure counter on the source side. DN9814277 Id:0900d805805a24bc Confidential 17 . including the DX cause.11 Internal handover intra for source side (phase 10) Internal handover inter for source side (phase 11) This phase covers the internal inter-cell handover signalling for the source side on an SDCCH or a TCH. the RCSPRB sets the cause for the handover and sends the appropriate signalling message forward. The RCSPRB decides on the basis of the results whether the handover is performed. On the source side. The HASPRB is responsible for this phase. the HASPRB converts the DX cause for the appropriate handover. the HASPRB sets the cause to source_fail_c. The failure counter is updated by the RRMPRB. The HASPRB checks the cause for the handover and decides that an internal handover should be made. No failure counters are updated because only one counter is updated for each failure. the ABIPRB sends the original DX cause (success DX cause for establishment) via the HASPRB to the target ABIPRB. in some cases. the HASPRB updates the handover success counter. 18 Id:0900d805805a24bc Confidential DN9814277 .Call phases of call related DX causes in BSC Call Related DX Causes in BSC The HASPRB is responsible for this phase. The HASPRB is responsible for this phase. and the DX cause is conveyed to the following phase. the successful DX cause is overwritten and the signalling continues as handover clearing. If the signalling finishes successfully. including the DX cause. If a failure occurs. The failure counter is updated by the RRMPRB or. The HASPRB converts the cause into the relevant DX cause for the external handover. by the HASPRB.12 Internal handover inter for source side (phase 11) External handover for target side (phase 12) This phase covers the external handover signalling for the target side on an SDCCH and a TCH. MS BTS BSC MSC MEAS_REPORT MEAS_RESULT HO_CMD HANDOVER_COMMAND HO_PERFORMED RF_CHANNEL_RELEASE RF_CHANNEL_RELEASE_ACK Figure 11 3. The AIVPRB sends the appropriate signalling message to the HASPRB. The success and failure cases are handled as described in Internal handover intra for source side. The BSC receives the HO REQUEST message with the relevant handover cause. This kind of situation only affects the informative counters. If a failure occurs before the assignment has been completed on the target side. The HASPRB sets the flag restore_old as TRUE and includes it in the DX cause that is sent to the ABIPRB to indicate that the MS returns to the old channel. The MS is able to return to the old channel. it sends an assignment failure. If it returns to the old channel. The source side DN9814277 Id:0900d805805a24bc Confidential 19 . the appropriate failure counter is updated.13 HO_DETECTION 8 > 10 UA 12 HO_REQUEST_ACK HANDOVER_ACCESS > HO_DETECTION 6 7 9 1 HO_COMPLETED External handover for target side (phase 12) Internal handover intra for target side (phase 13) This phase covers the internal intra-cell handover signalling for the target side on an SDCCH and a TCH.Call Related DX Causes in BSC Call phases of call related DX causes in BSC MS BTS BSC MSC HO_REQUEST CHANNEL_ACTIVATION 3 2 CHANNEL_ACTIVATION_ACK 4 5 PHYSICAL_INFO SABM ESTABLISH_INDICATION 11 HANDOVER_COMPLETE RR 13 14 HANDOVER_COMPLETE 15 Figure 12 3. See Internal handover intra for source side for a successful case. The HASPRB is responsible for this phase. If the MS does not return to the old channel (the MS is lost). If the failure occurs after the assignment has been completed on the target side. MS BTS BSC MSC CHANNEL_ACTIVATION CHANNEL_ACTIVATION_ACK SABM ESTABLISH_INDICATION UA ASSIGNMENT_COMPLETE RR HO_PERFORMED Figure 13 3. The HASPRB is responsible for this phase. The signalling continues on the old channel. Call clearing is started with the real failure cause on the source side and the failure counter is updated by the RRMPRB.Call phases of call related DX causes in BSC Call Related DX Causes in BSC ABIPRB receives the DX cause and the original establishment cause is restored.14 Internal handover intra for target side (phase 13) Internal handover inter for target side (phase 14) This phase covers the internal inter-cell handover signalling for the target side on an SDCCH or a TCH. the HASPRB sets the source_fail_c as the cause and sends it to the target side ABIPRB. the success cause is overwritten and the signalling continues as call clearing. The success and failure cases are handled as described in Internal handover intra for target side. 20 Id:0900d805805a24bc Confidential DN9814277 . MS BTS CONNECT ACK CHANNEL RELEASE Figure 15 DN9814277 BSC MSC CONNECT ACK CLEAR COMMAND Conversation (phase 15) Id:0900d805805a24bc Confidential 21 .Call Related DX Causes in BSC Call phases of call related DX causes in BSC MS BTS BSC MSC CHANNEL_ACTIVATION CHANNEL_ACTIVATION_ACK HANDOVER_ACCESS HO_DETECTION SABM ESTABLISH_INDICATION UA PHYSICAL_INFO HANDOVER_COMPLETE RR HANDOVER_COMPLETE HO_PERFORMED Figure 14 3. The ABIPRB is responsible for this phase. The RRMPRB updates the failure counter. The successful DX cause is received from the previous phase and conveyed further to the following phase. If a failure occurs.15 Internal handover inter for target side (phase 14) Conversation (phase 15) This phase covers MM signalling between the MS and the MSC during conversation on a TCH. the successful DX cause is overwritten with the failure cause and the signalling continues as call clearing. The phase starts when the BSC receives the CONNECT ACK message. 22 facch_answer_to_pagin_c FACCH call for which the establishment cause is answering to paging. 4. 23 facch_mo_speech_call_c FACCH call for which the establishment cause is mobile originating speech call. 22 Id:0900d805808c0d49 Confidential DN9814277 . 20 facch_emergency_call_c FACCH call for which the establishment cause is emergency call. 26 facch_mt_data_call_c FACCH call for which the establishment cause is mobile terminating data call. 25 facch_other_procedure_c FACCH call for which the establishment cause is other procedure. see DX and BSSMAP cause mapping. For more information on the relations of DX causes and BSSMAP causes. codes and descriptions are listed in the following sections. 24 facch_mo_data_call_c FACCH call for which the establishment cause is mobile originating data call. 27 facch_imsi_detach_c IMSI detach on the TCH channel due to SDCCH congestion. 21 facch_reestablishment_c FACCH call for which the establishment cause is re-establishment.List of call related DX causes in BSC Call Related DX Causes in BSC 4 List of call related DX causes in BSC Each success and failure cause has its own number that is used to identify it. 43 basic_mo_speech_call_c Basic call for which the establishment cause is mobile originating speech call. 42 basic_answer_to_pagin_c Basic call for which the establishment cause is answering to paging. 41 basic_reestablishment_c Basic call for which the establishment cause is re-establishment.1 Success causes The success causes are described below: Number Cause code and description 10 location_update_c Location updates. The cause numbers. 40 basic_emergency_call_c Basic call for which the establishment cause is emergency call. The handover setup cause is distance. 85 ext_in_o_and_m_inter_c An incoming external handover. 89 ext_in_unexpected_c An incoming external handover. 83 ext_in_dl_strength_c An incoming external handover. 87 ext_in_better_cell_c An incoming external handover. 47 basic_imsi_detach_c IMSI detach on the SDCCH channel. The handover setup cause is unexpected.Call Related DX Causes in BSC List of call related DX causes in BSC Number Cause code and description 44 basic_mo_data_call_c Basic call for which the establishment cause is mobile originating data call. DN9814277 Id:0900d805808c0d49 Confidential 23 . The handover setup cause is resp_to_msc_invoc. 82 ext_in_dl_quality_c An incoming external handover. 81 ext_in_ul_strength_c An incoming external handover. The handover setup cause is downlink quality. 88 ext_in_directed_retry_c An incoming external handover. The handover setup cause is uplink quality. The handover setup cause is directed retry. 84 ext_in_distance_c An incoming external handover. 45 basic_other_procedure_c Basic call for which the establishment cause is other procedure. 80 ext_in_ul_quality_c An incoming external handover. The handover setup cause is better cell. The handover setup cause is O and M intervention. The handover setup cause is uplink strength. The handover setup cause is downlink strength. 90 ext_in_switch_crc_pool_c An incoming external handover attempt for changing the A interface circuit pool. 86 ext_in_resp_to_msc_invoc_c An incoming external handover. 46 basic_mt_data_call_c Basic call for which the establishment cause is mobile terminating data call. The handover setup cause is uplink interference.List of call related DX causes in BSC Call Related DX Causes in BSC Number Cause code and description 91 ext_in_pre_empt_c An incoming external handover. 105 ext_out_ul_interf_c An outgoing external handover. The handover setup cause is distance. 101 ext_out_ul_rxlev_c An outgoing external handover. 108 ext_out_umbrella_ho_c An outgoing external handover. The handover setup cause is BSC traffic reason handover. 104 ext_out_dl_interf_c An outgoing external handover. The handover setup cause is downlink rx level. The handover setup cause is uplink rx quality. 96 ext_in_dtm_traffic_c An incoming external handover due to DTM disabled in the source cell and PCU quality control. 107 ext_out_pbgt_ho_c An outgoing external handover. 93 ext_in_isho_c An incoming external inter-system handover. 100 ext_out_dl_rxlev_c An outgoing external handover. The handover setup cause is PBGT handover. The handover setup cause is downlink rx quality. The handover setup cause is uplink rx level. The handover setup cause is umbrella handover. 102 ext_out_dl_rxqual_c An outgoing external handover. 92 ext_in_bsc_trho_c An incoming external handover. 94 ext_in_int_ho_to_ext_c An incoming MSC-controlled handover generated from an internal handover. 106 ext_out_distance_c An outgoing external handover. The handover setup cause is downlink interference. 24 Id:0900d805808c0d49 Confidential DN9814277 . 103 ext_out_ul_rxqual_c An outgoing external handover. The handover setup cause is preemption. 95 ext_in_dtm_no_res_avail_c An incoming external handover due to no free PS resources for a DTM call in the source cell. The handover setup cause is high speed of MS. 110 ext_out_dr_ho_c An outgoing external handover. 119 ext_out_det_fast_mov_ms_c An outgoing external handover. 111 ext_out_tr_ho_c An outgoing external handover. The handover setup cause is DR (directed retry) handover. The handover setup cause is uplink rx level. 121 inter_ul_rxlev_c An internal inter handover. The handover setup cause is rapid field drop. 114 ext_out_rap_fld_drop_c An outgoing external handover. The handover setup cause is low speed of MS. The handover setup cause is downlink rx quality. DN9814277 Id:0900d805808c0d49 Confidential 25 . The slow moving detection is based on the MS speed indications sent by the BTS. 115 ext_out_low_distance_c An outgoing external handover. The handover setup cause is preemption handover. The handover setup cause is forced handover. The slow moving detection is based on the received measurement of adjacent micro cells and on the umbrella-like handover criteria.Call Related DX Causes in BSC List of call related DX causes in BSC Number Cause code and description 109 ext_out_forced_ho_c An outgoing external handover. 113 ext_out_pre_empt_ho_c An outgoing external handover. The fast moving detection is based on the MS speed indications sent by the BTS. 116 ext_out_switch_crc_pool_c An outgoing external handover attempt to change the A interface circuit pool. The handover setup cause is downlink rx level. The handover setup cause is Slow Moving MS in the Macro Cell. The handover setup cause is low distance (extended cell radius functionality). 120 inter_dl_rxlev_c An internal inter handover. The handover setup cause is IDR handover. 117 ext_out_slow_moving_ms_c An outgoing external handover. 118 ext_out_det_slow_mov_ms_c An outgoing external handover. 112 ext_out_idr_ho_c An outgoing external handover. 122 inter_dl_rxqual_c An internal inter handover. The handover setup cause is TR (traffic reason) handover. 127 inter_pbgt_ho_c An internal inter handover. The handover setup cause is distance. 135 inter_low_distance_c An internal inter handover. 136 inter_ok_ci_ratio_c An internal inter handover. The handover setup cause is PBGT handover. The handover setup cause is low distance (extended cell radius functionality). 26 Id:0900d805808c0d49 Confidential DN9814277 . 137 inter_bad_ci_ratio_c An internal inter handover. The handover setup cause is TR (traffic reason) handover. The handover setup cause is umbrella handover. The handover setup cause is downlink interference. The handover setup cause is forced handover. 134 inter_rap_fld_drop_c An internal inter handover. 126 inter_distance_c An internal inter handover. 132 inter_idr_ho_c An internal inter handover. 128 inter_umbrella_ho_c An internal inter handover. The handover setup cause is ok C/I ratio (Underlay-overlay handover). The handover setup cause is bad C/I ratio (Underlay-overlay handover). The handover setup cause is uplink interference. The handover setup cause is pre-emption handover. The handover setup cause is uplink rx quality. 129 inter_forced_ho_c An internal inter handover. The handover setup cause is IDR handover. 124 inter_dl_interf_c An internal inter handover. The handover setup cause is rapid field drop. 131 inter_tr_ho_c An internal inter handover. 130 inter_dr_ho_c An internal inter handover. 125 inter_ul_interf_c An internal inter handover. 133 inter_pre_empt_ho_c An internal inter handover.List of call related DX causes in BSC Call Related DX Causes in BSC Number Cause code and description 123 inter_ul_rxqual_c An internal inter handover. The handover setup cause is DR handover. 139 inter_det_slow_mov_ms_c An internal inter handover. The slow moving detection is based on the MS speed indications sent by the BTS. The slow moving detection is based on the received measurement of adjacent micro cells and on the umbrellalike handover criteria. DN9814277 Id:0900d805808c0d49 Confidential 27 .Call Related DX Causes in BSC List of call related DX causes in BSC Number Cause code and description 138 inter_slow_moving_ms_c An internal inter handover. The handover setup cause is low speed of the MS. The handover setup cause is Slow Moving MS in the Macro Cell. 140 intra_dl_interf_c An internal intra handover. The handover setup cause is forced handover. 147 intra_distance_c An internal intra-cell handover from a normal area to an extended area is performed when the timing advance (TA) of the MS equals or is greater than that defined by the parameter maxMSDistanceHOThreshold. 144 intra_ok_ci_ratio_c An internal intra handover. 145 intra_bad_ci_ratio_c An internal intra handover. The handover setup cause is ok C/I ratio (Underlay-overlay handover). 141 intra_ul_interf_c An internal intra handover. 148 intra_low_distance_c An internal intra-cell handover from an extended area to a normal area is performed when the timing advance (TA) of the MS equals or is greater than that defined by the parameter minMSDistanceHOThreshold. 142 intra_forced_ho_c An internal intra handover. The handover setup cause is uplink interference. 146 intra_pre_empt_ho_c An internal intra handover. 143 intra_dl_rxqual_c An internal intra handover. The handover setup cause is downlink rx quality. 149 intra_dr_ho_c Assignment attempt from an SDCCH to a super-reuse frequency. The handover setup cause is downlink interference. 150 intra_direct_access_c A successful internal intra-cell handover from a dedicated control channel to a super-reuse TRX. The handover setup cause is bad C/I ratio (Underlay-overlay handover). The handover setup cause is pre-emption handover. Handover setup cause is direct access. 159 inter_bsc_trho_c An internal inter handover whose setup cause is BSC traffic reason handover. based on SDCCH reservation duration in a BTS on the BCCH frequency band. 162 inter_dtm_no_res_avail_c An internal inter-cell handover due to no free PS resources for a DTM call in the source cell. 155 intra_inter_band_sdc_c An SDCCH-SDCCH handover. 166 intra_inter_bts_type_tch_c A TCH-TCH handover from one type of BTS to anothert type due to load reasons within a segment. 152 intra_ho_to_amr_hr_c An internal intra-cell handover from AMR FR to AMR HR. The handover setup cause is high speed of the MS. 158 inter_direct_access_c A successful internal inter-cell handover from a dedicated control channel to a super-reuse TRX. The handover is performed in order to get more resources for GPRS. 156 inter_det_fast_mov_ms_c An internal inter handover. 164 ext_out_bsc_trho_c An outgoing external handover whose setup cause is BSC traffic reason handover.List of call related DX causes in BSC Call Related DX Causes in BSC Number Cause code and description 151 intra_gprs_ho_c An internal intra handover. based on SDCCH reservation duration from one type of BTS to another type within a segment. 28 Id:0900d805808c0d49 Confidential DN9814277 . 167 intra_inter_bts_type_sdc_c An SDCCH-SDCCH handover. 163 ext_out_erfd_ho_c Handover cause Enhanced Rapid Field Drop handover. The fast moving detection is based on the MS speed indications sent by the BTS. 153 intra_ho_to_amr_fr_c An internal intra-cell handover from AMR HR to AMR FR. 157 inter_erfd_ho_c Handover cause Enhanced Field Drop handover. to a BTS on another frequency band. Handover setup cause is direct access. 160 inter_dadlb_c An internal inter handover whose setup cause is Direct Access to Desired Layer/Band. 154 intra_inter_band_tch_c A TCH-TCH handover that has been made due to load reasons between BTSs on different frequency bands of a segment. 181 intra_dhr_rxqual_dmux_ho_c An internal intra-cell handover starting from OSC DHR based on Rx quality 182 intra_rxlev_diff_dmux_ho_c An internal intra-cell handover starting from OSC DHR based on UL Rx level difference between the multiplexed DHR TCHs DN9814277 Id:0900d805808c0d49 Confidential 29 . 173 intra_dtm_ps_to_cs_c An internal intra-cell handover due to DTM call release. 176 intra_lrtch_ho_to_super_c An internal intra-cell handover that is performed to move a call on a Long Reach TCH to a TCH in the super extended area of the cell. 174 intra_lrtch_ho_to_norm_c An internal intra-cell handover that is performed to move a call on a Long Reach TCH to a TCH in the normal area of the cell. 179 intra_ho_from_hr_to_dhr_c An internal intra-cell handover that is performed in order to move call from AMR-HR to DHR. performed due to weak downlink signal level. 170 intra_dtm_mo_cs_to_ps_c An internal intra-cell handover due to mobile-originated DTM call establishment. 171 intra_dtm_mt_cs_to_ps_c An internal intra-cell handover due to mobile-terminated DTM call establishment. 175 intra_lrtch_ho_to_ext_c An internal intra-cell handover that is performed to move a call on a Long Reach TCH to a TCH in the extended area of the cell. 178 intra_ho_super_to_ext_c An internal intra-cell handover that is performed to move a call on the super extended area to the extended area of the cell.Call Related DX Causes in BSC List of call related DX causes in BSC Number Cause code and description 168 intra_ho_due_to_hscsd_c An internal intra-cell handover made to enable an HSCSD upgrade. 172 intra_dtm_mt_ps_to_ps_c An internal intra-cell handover due to PCU-initiated DTM call reallocation. 177 intra_ho_ext_to_super_c An internal intra-cell handover that is performed to move a call on the extended area to the super extended area of the cell. 180 intra_ho_from_fr_to_dhr_c An internal intra-cell handover that is performed in order to move call from AMR-FR to DHR. 169 intra_inter_band_due_lev_c A TCH-TCH handover from a non-BCCH frequency layer between BTSs on different frequency bands of a segment. List of call related DX causes in BSC Call Related DX Causes in BSC Number Cause code and description 183 intra_dhr_rxlev_dmux_ho_c An internal intra-cell handover starting from OSC DHR based on Rx level 184 intra_ho_from_fr_to_dfr_c An internal intra-cell handover that is performed in order to move call from AMR-FR to DFR 185 intra_dfr_rxqual_dmux_ho_c An internal intra-cell handover starting from OSC DFR based on Rx quality 186 intra_dfr_rxl_df_dmux_ho_c An internal intra-cell handover starting from OSC DFR based on UL Rx level difference between the multiplexed DFR TCHs 187 intra_dfr_rxlev_dmux_ho_c An internal intra-cell handover starting from OSC DFR based on Rx level 188 intra_mcpa_pbho_tch_c An internal intra-cell power balancing handover to move calls from TSLs experiencing high power compression to better TSLs (within an MCPA enabled Segment). 30 Id:0900d805808c0d49 Confidential DN9814277 . 193 ext_out_ibho_to_utran_c An outgoing external IMSI based handover from the source GSM network to the UTRAN authorised networks. 196 ext_out_dtm_disabled_c An outgoing external handover due to DTM disabled in the serving cell. The handover setup cause is BSC traffic load. The handover setup cause is BSC traffic. The handover setup cause is direct access handover. 195 ext_out_dtm_no_res_avail_c An outgoing external handover due to no free PS resources for a DTM call in the serving cell. 190 ext_out_isho_c An outgoing external inter-system handover. 194 ext_out_int_ho_to_ext_c An outgoing MSC-controlled handover generated from an internal handover. 192 ext_out_ibho_to_gsm_c An outgoing external IMSI based handover from the source GSM network to the GSM authorised networks. 197 ext_out_pcu_qual_cntrl_c An outgoing external handover due to PCU quality control in the serving cell. 191 ext_out_inter_system_da_c An outgoing external inter-system direct access handover. The handover setup cause is BSC traffic. Causes set by the Abis Interface Program Block (ABIPRB) Number Cause code and description 300 user_act_block_c Channel blocking caused by the user.2 Failure causes The failure causes are divided into the following groups according to the program block that sets the cause in question: • • • • • • • causes set by the Abis Interface Program Block (ABIPRB) causes set by the Radio Connection Supervision Program Block (RCSPRB) or Radio Resource Management Program Block (RRMPRB) causes set by the A interface Signalling Program Block in BSC (AIVPRB) causes set by the Speech Circuit Control in GSM BSC A interface (SC7PRB) causes set by the Resource Control Program Block in BSC (RC0PRB) causes set by the Handover Attempt Supervisor Program Block (HASPRB) causes set by the DX MSC (MSC). 303 lapd_fail_block_c Channel blocking caused by an LAPD failure. 301 netw_act_block_c Channel blocking caused by the network. 241 inter_pcu_qual_cntrl_c An internal inter-cell handover due to PCU quality control in the source cell. 243 inter_mss_trg_bss_int_ho_c An internal inter-cell handover due to Internal Handover requested by MSS 4. 302 bts_fail_block_c Channel blocking caused by a BTS failure. 240 inter_dtm_disabled_c An internal inter-cell handover due to DTM disabled in the source cell. DN9814277 Id:0900d805808c0d49 Confidential 31 . 242 inter_dtm_ho_to_dtm_c An internal inter-cell handover due to DTM not supported in the source cell. 199 ext_out_dtm_ho_to_wcdma_c An outgoing external handover for mobile stations that support WCDMA but not DTM.Call Related DX Causes in BSC List of call related DX causes in BSC Number Cause code and description 198 ext_out_dtm_ho_to_dtm_c An outgoing external handover due to DTM not supported in the serving cell. 305 abis_msg_corrup_to_bts_c The packing of the Abis interface message fails. 318 conn_fail_rem_trans_fail_c The Abis interface receives a CONNECTION FAILURE message and its cause is remote transcoder failure. 316 conn_fail_rad_inf_fail_c The Abis interface receives a CONNECTION FAILURE message and its cause is radio interface failure. 310 ch_act_nack_equip_fail_c The Abis interface receives a CHANNEL ACTIVATION NACK message. and the cause is equipment failure. 311 ch_act_nack_encryp_alg_c The Abis interface receives a CHANNEL ACTIVATION NACK message and the cause is encryption algorithm not supported. and the cause is O and M intervention. 306 ass_fail_msg_c The Abis interface receives an ASSIGNMENT FAILURE message from the MS during a Basic Call. 313 ch_act_nack_serv_not_ava_c The Abis interface receives a CHANNEL ACTIVATION NACK message and the cause is service is not available. 308 ch_act_nack_c The Abis interface receives a CHANNEL ACTIVATION NACK message or its contents have been corrupted. 314 ch_act_fail_c The Abis interface receives a CHANNEL ACTIVATION ACK message and its contents have been corrupted or a timer expires while waiting for the message. 32 Id:0900d805808c0d49 Confidential DN9814277 . 312 ch_act_nack_rad_ch_alr_a_c The Abis interface receives a CHANNEL ACTIVATION NACK message and the cause is radio channel already allocated. 315 conn_fail_c The Abis interface receives a CONNECTION FAILURE message. 317 conn_fail_rad_link_fail_c The Abis interface receives a CONNECTION FAILURE message and its cause is radio link failure. 309 ch_act_nack_om_inter_c The Abis interface receives a CHANNEL ACTIVATION NACK message. 307 block_slave_c Channel blocking caused by some other reason than the ones given above.List of call related DX causes in BSC Call Related DX Causes in BSC Number Cause code and description 304 abis_fail_block_c Channel blocking caused by an Abis failure. Call Related DX Causes in BSC List of call related DX causes in BSC Number Cause code and description 319 data_ind_corrup_c The Abis interface receives a DATA INDICATION message whose contents have been corrupted. A BSCinternal failure. 321 estab_ind_fail_c A timer expires while waiting for an ESTABLISH INDICATION message. 331 rcs_alg_cl_ack_fail_c The Abis interface receives an rcs_algorithm_clear_ack message whose contents have been corrupted or a timer expires while waiting for the message. 325 mode_mod_nack_c The Abis interface receives a MODE MODIFY NACK message. 328 no_resp_from_copro_c Timer expires because the co-process does not respond. The contents have been corrupted or a timer expires while waiting for the message. BSC-internal signalling. BSC-internal signalling. DN9814277 Id:0900d805808c0d49 Confidential 33 . 324 ho_detect_fail_c The Abis interface receives an HO DETECT message. The contents of the message have been corrupted or a timer expires while waiting for the message. 332 rc0_disco_ind_c The Abis interface receives an rco_disconnect_ind message from RC0. The contents of the message have been corrupted or a timer expires while waiting for the message. 326 mode_mod_ack_fail_c The Abis interface receives a MODE MODIFY ACK message whose contents have been corrupted or a timer expires while waiting for the message. 330 rcs_alg_start_ack_fail_c The Abis interface receives an rcs_algorithm_start_ack message whose contents have been corrupted or a timer expires while waiting for the message. 327 no_meas_result_c No measurement result messages from the BTS. 322 estab_conf_fail_c The Abis interface receives an ESTABLISH CONFIRM message. 320 err_ind_c The Abis interface receives an ERROR INDICATION message. 329 phy_cont_conf_fail_c The Abis interface receives a PHYSICAL CONTEXT CONFIRM message. The MS has sent an ASSIGNMENT FAILURE or a HANDOVER FAILURE message to the network during the handover. 323 ho_fail_c The handover has failed and the MS returns to the source channel. 340 rej_phantom_res_c Rejected phantom reservations caused by the wrong establishment cause in the channel required message from the MS or a too long distance between the MS and the BTS. 344 paging_msg_fail_c The Abis interface receives an MS PAGING message and the channel has been blocked. 338 type_conflict_c An attempt to activate a channel with the wrong information in the Abis interface. 342 abi_switchover_c The BCSU switchover has been started. The contents of the message have been corrupted or a timer expires while waiting for the message. 334 rel_ind_c The Abis interface receives a RELEASE INDICATION message.List of call related DX causes in BSC Call Related DX Causes in BSC Number Cause code and description 333 rf_ch_rel_ack_fail_c The Abis interface receives an RF CH REL ACK message whose contents have been corrupted or a timer expires while waiting for the message. 34 Id:0900d805808c0d49 Confidential DN9814277 . 346 mode_mod_nack_equip_fail_c The Abis interface receives a MODE MODIFY NACK message with the cause equipment failure. 336 signalling_error_c DTAP signalling fails. 345 ch_required_fail_c The Abis interface receives a CHANNEL REQUIRED message whose contents have been corrupted. 339 forced_rel_c Forced TCH release. the Abis interface receives a RELEASE INDICATION message or the ESTABLISH_INDICATION message received has been corrupted. 337 state_conflict_c An attempt to activate a blocked channel in the Abis interface. 341 overload_c Overload message from the BTS. 335 rel_ind_fail_c The Abis interface receives a RELEASE INDICATION message. 343 sapi_3_fail_c During SMS establishment. 347 mode_mod_nack_trc_rat_un_c The Abis interface receives a MODE MODIFY NACK message with the cause requested transcoding/rate adaption not available. 351 dr_fail_c Directed retry procedure fails. 357 speech_version_unavail_c The Abis interface receives an ASSIGNMENT FAILURE message or a HANDOVER FAILURE message from the MS during an assignment or a handover and the RR cause is channel mode unacceptable. 355 ch_act_nack_ch_mode_err_c The Abis interface receives a CHANNEL ACTIVATION NACK message and the failure cause is either not implemented unspecified or mandatory IE error. 358 ignored_double_rand_acc_c If two incoming random accesses have the same frame number. All SDCCH resources controlled by the BCSU are already in use. the latter one is ignored when random access buffering is used in an extended range cell. 361 downgrade_c Channel release caused by a downgrade. 349 ch_mode_mod_fail_c The Abis interface receives a CH MODE MODIFY ACK message and the mode does not correspond to the requested mode. 354 error_report_c An ERROR REPORT message is received from the BTS. 353 err_rep_enc_alg_not_imp_c An ERROR REPORT message is received from the BTS and the cause is encryption algorithm not implemented. the handover attempt is terminated with DX cause ho_interrupted_c. 360 ho_interrupted_c If an assignment procedure is started before the MS is assigned to move to a new channel. 350 ass_fail_c Timer expires while waiting for the ASSIGNMENT COMPLETE message. DN9814277 Id:0900d805808c0d49 Confidential 35 . 362 ho_not_started_c Rejected handover start due to other ongoing procedures. 359 rtsl_reconf_fail_c Reconfiguration of a dynamic SDCCH resource has failed during immediate assignment. 352 coprocess_fail_c A failure has occurred in co-process. 356 ch_act_nack_gen_ie_err_c The Abis interface receives a CHANNEL ACTIVATION NACK message and the failure cause is general IE error.Call Related DX Causes in BSC List of call related DX causes in BSC Number Cause code and description 348 rrm_serv_req_nack_c The Abis interface receives an RRM CH SER REQ NACK message. 36 Id:0900d805808c0d49 Confidential DN9814277 . 375 ciph_not_support_trx_c Number of failed ciphering algorithm selections due to incompatible ciphering algorithm support 376 dfca_hop_prm_not_valid_c Number of SDCCH channel releases caused by invalid DFCA hopping parameters 377 etp_failure_c Number of TCH release due to ETPx resource reservation failure. 364 conf_change_bts_fail_c Failed configuration change due to a MODE MODIFY NACK message or no answer from the BTS. 374 cn_id_not_found_c TCH or SDCCH channel release that occurs because a global CN ID that would match the mobile's IMSI is not found in the BSC for the CS PAGING RESPONSE message. 368 forced_ho_block_c Forced handover due to channel or TRX block. 370 estab_ind_corrupted_c An ESTABLISH INDICATION message which the Abis interface receives because of the corrupted contents of the message.List of call related DX causes in BSC Call Related DX Causes in BSC Number Cause code and description 363 conf_change_not_allowed_c Rejected upgrade. 367 sub_timer_c Timer expiry due to sub-channel not responding to the main channel in the HSCSD connection. 373 bsc_bsc_conflict_c Unsuccessful channel setup when BSC-BSC conflict control is used. 365 conf_change_ms_fail_c Failed configuration change due to a configuration change reject or no answer from the MS. 369 upgrade_fail_c Upgrade procedure failure. 366 hscsd_copro_fail_c Channel release caused by a failure in another channel in the HSCSD configuration. downgrade or ALA due to other ongoing procedures. Call Related DX Causes in BSC List of call related DX causes in BSC Causes set by the Radio Connection Supervision Program Block (RCSPRB) or Radio Resource Management Program Block (RRMPRB) Number 400 Cause code and description timing_advance_c The call is released after the distance between the MS and the BTS has reached the maximum value allowed. 604 sccp_release_c Abnormal release of the SCCP connection (RLSD received). 401 rrm_switch_crc_pool_c The Radio Resource Management Program Block (RRMPRB) sets this cause in the TCH RESOURCE REQUEST NEGATIVE ACKNOWLEDGEMENT message in order to indicate the A interface circuit pool change request. 603 sccp_conn_timeout_c No response from the MSC to the SCCP connection establishment. 405 rrm_invalid_cell_c The traffic channel allocation in the external handover has failed. Assignment Failure or Handover Failure messages are sent to MSC which report that requested codec type or codec configuration is unavailable. DN9814277 Id:0900d805808c0d49 Confidential 37 . 403 bts_not_supporting_c A resource that is not supported by the BTS has been requested. The HANDOVER REQUEST message received by the BSS indicates a target cell that is not controlled by the BSS. 402 rrm_speech_ver_unavail_c The requested speech version is not supported by the target BTS. 601 aiv_ssp_c SCCP connection establishment is not possible because the subsystem is in the prohibited status. A CREF message is received from the MSC. The situation is detected by the AIVPRB master. 409 unavail_codec_type_conf_c Cause set when its unable to allocate the provided speech codecs in a segment during normal Assignment or External Handover. after the MS has exceeded the planned cell boundaries. 404 ms_not_supporting_c A resource that is not supported by the MS has been requested. Causes set by the A interface Signalling Program Block in BSC (AIVPRB) Number Cause code and description 600 aiv_hand_act_fail_c Activation of a hand process fails in the AIVPRB master. that is. 602 sccp_conn_fail_c SCCP connection establishment fails. is received from the MSC. 611 ho_denied_clear_c Starting of the handover is not allowed because the call clearing procedure is in progress. 617 aiv_crct_disconn_timeout_c Timeout in the AIVPRB while disconnecting an A interface speech circuit. 612 ho_denied_no_sccp_conn_c Starting of an external SDCCH handover is not allowed because the SCCP connection establishment is not complete. 608 no_dtap_from_msc_c No DTAP message from the MSC after a successful SCCP connection establishment. 615 aiv_crct_res_timeout_c Timeout in the AIVPRB while allocating an A interface speech circuit. which leads to the clearing of the call. 621 invalid_bssmap_msg_c An erroneous message. 618 aiv_crct_rel_timeout_c Timeout in the AIVPRB while releasing an A interface speech circuit. has expired. 610 ho_denied_ciphering_c Starting of the handover is not allowed because the ciphering procedure is in progress. 609 ho_denied_assign_c Starting of the handover is not allowed because an assignment procedure is in progress. 616 aiv_crct_conn_timeout_c Timeout in the AIVPRB while connecting an A interface speech circuit. 622 unknown_a_pcm_c Message received concerning an unknown A interface circuit.List of call related DX causes in BSC Call Related DX Causes in BSC Number Cause code and description 606 global_reset_c State change of an SCCP subsystem or a RESET message from the MSC. 619 aiv_timeout_c Timeout in the AIVPRB in BSC internal communication. 38 Id:0900d805808c0d49 Confidential DN9814277 . 613 T7_expiry_c Expiry of GSM timer T7. which supervises the communication between the Abis and the A interface. 620 act_ctrl_timeout_c The BSC internal supervision timer. 614 T10_expiry_c Expiry of GSM timer T10. 633 unavail_a_if_type_c Cause set when Assignment Failure or Handover Failure messages are sent to MSC which report that requested A-interface type is unavailable. DN9814277 Id:0900d805808c0d49 Confidential 39 . 629 aiv_conn_refresh_failed_c The connection refreshing procedure has failed. 626 aiv_speech_version_unava_c The speech coder version requested by the MSC is not supported. Assignment Failure or Handover Failure messages are sent. 628 aiv_conn_refresh_timeout_c Timeout in the connection refreshing procedure. 625 aiv_transc_or_rate_unava_c The TCH type requested by the MSC is not supported. 624 ch_type_mismatch_c The radio interface data rate requirement is totally contradictory with the TCH channel rate request of the channel type IE included in the normal Assignment Request or Handover Request. 634 t25_timer_expiry_c Cause set when T25 timer expires waiting for Internal Handover Command from MSC. 631 no_supp_redundancy_level_c Cause set when MSC requested redundancy level for data calls is not supported by the BSC. which report that requested redundancy level is not supported. 627 aiv_pagin_refus_big_load_c A PAGING message is received from the MSC when the BCSU unit load is too high. Assignment Failure or Handover Failure messages are sent. In the Assignment Request related to the In Call Modification or the FACCH call setup. which report that requested codec type or codec configuration is not supported. The load is observed by the number of unhandled messages in the unit. Assignment Failure or Handover Failure messages are sent from BSC to MSC which report that requested Ainterface type is not supported.Call Related DX Causes in BSC List of call related DX causes in BSC Number Cause code and description 623 ho_denied_no_proper_crc_c Handover is denied when the AIVPRB receives the handover inquiry message from the Handover Attempt Supervisor Program Block (HASPRB) with the cause switch circuit pool and there is no proper A interface circuit fitting in with the pool list of the inquiry message. the TCH channel rate request or the data rate request are totally contradictory with the type of TCH where the call is to be maintained. 632 no_supp_codec_type_conf_c Cause set when none of the codecs provided by MSC in Assignment/Handover request are supported by the BSC. 630 no_support_a_if_type_c Cause is set when. 804 sc7_crct_rel_timeout_c Timeout in the SC7PRB while releasing an A interface speech circuit. 806 a_tsl_status_unknown_c Assignment of a circuit whose status is unknown. 808 scc_access_fail_c Access to the System-controlled Circuit State File (SCCTST) failed. 810 crct_equipment_fail_c The SC7PRB has detected a situation which has been caused by hardware problems. 817 a_crct_removed_c A speech circuit has been removed from use. disconnect or release a speech circuit is received from a process which is not recorded as a user of the circuit in the internal control tables of SC7PRB. 801 sc7_crct_res_timeout_c Timeout in the SC7PRB while allocating an A interface speech circuit. 802 sc7_crct_conn_timeout_c Timeout in the SC7PRB while connecting an A interface speech circuit. 815 a_pcm_fault_c A fault has been detected in the 2-Mbit PCM connection. 803 sc7_crct_disconn_timeout_c Timeout in the SC7PRB while disconnecting an A interface speech circuit. 40 Id:0900d805808c0d49 Confidential DN9814277 . 811 reset_crct_c The RESET CIRCUIT message has been received from the MSC. 805 a_tsl_blocked_c Assignment of a circuit that is blocked. 819 a_et_state_change_c State change of the ET has occurred. 809 undef_tsl_in_lsi_c The circuit concerned is not defined in the LSIGNL file. 813 sc7_ssp_c An error caused by the SCCP prohibited status. The situation has been detected by the SC7PRB. 807 lsi_access_fail_c Access to the Line Signalling File (LSIGNL) failed.List of call related DX causes in BSC Call Related DX Causes in BSC Causes set by the Speech Circuit Control in GSM BSC A interface (SC7PRB) Number Cause code and description 800 a_tsl_user_mismatch_c A request to connect. 703 rc0_crct_conn_timeout_c Timeout in the RC0PRB while connecting an A interface speech circuit. 711 rc0_a_crct_congestion_c There is no free circuit for the call. 701 a_crct_alr_res_c Assignment of a speech circuit which has already been allocated. none of which are supported by the BSC. DN9814277 Id:0900d805808c0d49 Confidential 41 . 709 rc0_req_speech_ver_unava_c BSC has received either an ASSIGNMENT REQUEST or a HANDOVER REQUEST message containing speech codec versions. 705 a_crct_rel_err_c Circuit release error in marker while releasing an A interface speech circuit. 710 rc0_hunting_queue_full_c The hunting queue is full. 706 rc0_transc_or_rate_unava_c The requested channel rate corresponding to the A interface circuit pool has not been defined on the A interface. An emergency call has taken priority over the ordinary call. 713 rc0_crct_pool_mismatch_c The hunted circuit is from the wrong circuit pool. 707 rc0_cip_type_mismatch_c The circuit type A is totally contradictory with the TCH channel rate requirement or the data rate requirement implies the circuit pool change.Call Related DX Causes in BSC List of call related DX causes in BSC Causes set by the Resource Control Program Block in BSC (RC0PRB) Number Cause code and description 700 rc0_hand_act_fail_c The RC0PRB master fails to activate a hand process. 712 rc0_a_search_error_c The content of the hunting request message is invalid. 702 a_crct_conn_err_c Connection error in marker while connecting an A interface speech circuit. 708 rc0_inv_msg_contents_c The radio interface data rate requirement is totally contradictory with the A interface pool configuration. 704 access_out_of_crct_tbl_c Requested speech circuit not found in the circuit control table. 714 rc0_rej_due_eme_call_c The hunting queue is full. BSSAP Handover Failure messages are sent which report that requested terrestrial resource is unavailable. 505 has_state_conflict_c Target channel reservation has failed. Causes set by the Handover Attempt Supervisor Program Block (HASPRB) Number Cause code and description 500 ho_not_allowed_c External handover was not allowed during a FACCH call setup. 507 ms_is_lost_c The timer T3107. 716 a_crct_conn_err_consec_c Consecutive connection errors are encountered on the same A-interface circuit. 503 no_resp_from_coprocess_c Signalling with the internal processes has failed during handover signalling. external DR handover was disabled. or all candidate cells for an external handover were n-areas of the extended cells. The MS has not established a channel to the target side. Assignment Failure or Handover Failure messages are sent to MSC which report that call identifier is already allocated. 504 no_resp_to_radio_res_req_c Target channel reservation has failed during handover signalling. No answer to the radio resource request. 501 no_radio_res_avail_c No radio resources in the BTS for channel reservation during handover signalling. 506 clear_cmd_not_received_c No CLEAR COMMAND has been received from the A interface during external source handover signalling. An ASSIGNMENT COMPLETE or HANDOVER COMPLETE message has not been received. CHANNEL ACTIVATION ACK message not been received and the timer for it has expired. T3103 or T9113 has expired.List of call related DX causes in BSC Call Related DX Causes in BSC Number Cause code and description 715 rc0_ilc_file_error_c A interface circuit reservation fails because no pool is available on the hunting list. 718 unavail_terr_resource _c Cause is set when it is unable to reserve PCM-TSL resources for an AoTDM call during Internal/External Handover. 42 Id:0900d805808c0d49 Confidential DN9814277 . 717 call_id_alr_allocated_c Cause set when it finds that the call_id provided by the MSC in Assignment Request/Internal Handover Command/Handover Request is already being used in the BSC. 510 target_fail_c Failure in the target channel. 509 has_switchover_c Switchover has been started and the handover has failed. The BSC cannot observe these causes if the phase is MM signalling (2) or conversation (15). Number Cause code and description 900 m_radio_if_mess_fail_c Cause value 0x00 radio interface message failure received from the MSC. 907 m_o_and_m_inter_c Cause value 0x07 O and M intervention received from the MSC. DN9814277 Id:0900d805808c0d49 Confidential 43 . 901 m_radio_if_fail_c Cause value 0x01 radio interface failure received from the MSC. 512 has_call_control_c The master has failed to create a hand. Causes set by the DX MSC (MSC) These causes are only possible during signalling. This counter indicates that information in the source BSS Radio Network Configuration Database concerning adjacent cells is incorrect. 906 m_distance Cause value 0x06 distance received from the MSC. 511 source_fail_c Failure in the source channel.Call Related DX Causes in BSC List of call related DX causes in BSC Number Cause code and description 508 no_resp_to_ho_cpl_msg_c Problems in sending the HANDOVER PERFORMED message by the BSC. 905 m_downlink_strength_c Cause value 0x05 downlink strength received from the MSC. 904 m_downlink_quality_c Cause value 0x04 downlink quality received from the MSC. 902 m_uplink_quality_c Cause value 0x02 uplink quality received from the MSC. 513 adj_cell_id_err_c The handover attempt was interrupted when the BSC noticed that the target cell information (BCCH frequency and/or BSIC) received from the MSC in the HANDOVER COMMAND message is incorrect. 908 m_resp_to_msc_invoc_c Cause value 0x08 response to MSC invocation received from the MSC. 903 m_uplink_strength_c Cause value 0x03 uplink strength received from the MSC. 925 m_unexpected_c Unexpected failure from the MSC. 916 m_req_terr_res_unava_c Cause value 0x22 requested terrestrial resource unavailable received from the MSC. 918 m_processor_overload_c Cause value 0x24 processor overload received from the MSC. 913 m_directed_retry_c Cause value 0x0D directed retry received from the MSC. 921 m_tr_cod_rat_ad_unav_c Cause value 0x30 requested transcoding/rate adaption unavailable received from the MSC. 44 Id:0900d805808c0d49 Confidential DN9814277 . 917 m_ccch_overload_c Cause value 0x23 ccch overload received from the MSC. 912 m_better_cell_c Cause value 0x0C better cell received from the MSC. 919 m_bss_not_equipped_c Cause value 0x25 bss not equipped received from the MSC. 923 m_terr_chan_alr_allc_c Cause value 0x50 terrestrial circuit already allocated received from the MSC. reversion to old channel received from the MSC.List of call related DX causes in BSC Call Related DX Causes in BSC Number Cause code and description 909 m_call_control_c Cause value 0x09 call control received from the MSC. 922 m_ciph_alg_not_supp_c Cause value 0x40 ciphering algorithm not supported received from the MSC. 924 m_prot_err_b_bsc_msc_c Cause value 0x60 protocol error between BSC and MSC received from the MSC. 920 m_ms_not_equipped_c Cause value 0x26 ms not equipped received from the MSC. 911 m_handover_succ_c Cause value 0x0B handover successful received from the MSC. 910 m_r_if_f_rev_to_old_c Cause value 0x0A radio interface failure. 915 m_no_radio_res_avail_c Cause value 0x21 no radio resource available received from the MSC. 914 m_equipment_fail_c Cause value 0x20 equipment failure received from the MSC. 943 m_unavail_a_if_type_c Cause value 0x36 Requested A-Interface Type unavailable received from MSC. 944 m_unavail_codec_typ_conf_c Cause value 0x35 Requested Codec Type or Codec Configuration unavailable received from MSC DN9814277 Id:0900d805808c0d49 Confidential 45 . 930 m_unknown_msg_type_c Cause value 0x54 unknown message type received from the MSC. 928 m_ie_or_field_missing_c Cause value 0x52 information element or field missing received from the MSC. 942 m_no_support_a_if_type_c Cause value 0x45 Requested A-Interface Type not supportedreceived from MSC. 937 m_traffic_c Cause value 0x0F traffic received from the MSC. 932 m_transc_or_rate_unavail_c Cause value 0x30 requested transcoding/rate adaption unavailable received from the MSC. 933 m_cip_type_mismatch_c Cause value 0x31 circuit pool mismatch received from the MSC. 938 m_traffic_load_c Cause value 0x28 traffic load received from the MSC. 927 m_invalid_msg_cont_c Cause value 0x51 invalid message contents received from the MSC. 941 m_no_supp_codec_typ_conf_c Cause value 0x44 Requested Codec Type or Codec received from MSC. 929 m_incorrect_value_c Cause value 0x53 incorrect value received from the MSC. 931 m_unknown_ie_c Cause value 0x55 unknown information element received from the MSC.Call Related DX Causes in BSC List of call related DX causes in BSC Number Cause code and description 926 m_invalid_cell_c Cause value 0x27 invalid cell received from the MSC. 936 m_pre_empt_c Cause value 0x29 preemption received from the MSC. 935 m_speech_version_unavail_c Cause value 0x31 requested speech version unavailable received from the MSC. 934 m_switch_crc_pool_c Cause value 0x32 switch circuit pool received from the MSC. List of call related DX causes in BSC Call Related DX Causes in BSC Number Cause code and description 945 m_no_supp_redundancy_lvl_c Cause value 0x46 Requested Redundancy Level not supported received from MSC 46 Id:0900d805808c0d49 Confidential DN9814277 . 5. The first table maps DX causes to BSSMAP causes and the second BSSMAP causes to DX causes.1 DX causes mapped to BSSMAP causes The following table lists the BSC-internal DX causes and the corresponding BSSMAP causes that are used on the A interface. HEX Dec DX cause BSSMAP cause HEX DEC 50 80 ext_in_ul_quality_c Uplink quality 2 2 51 81 ext_in_ul_strength_c Uplink strength 3 3 52 82 ext_in_dl_quality_c Downlink quality 4 4 53 83 ext_in_dl_strength_c Downlink strength 5 5 54 84 ext_in_distance_c Distance 6 6 55 85 ext_in_o_and_m_inter_c O and M intervention 7 7 56 86 ext_in_resp_to_msc_invoc_c Response to MSC invocation 8 8 57 87 ext_in_better_cell_c Better cell C 12 58 88 ext_in_directed_retry_c Directed retry D 13 59 89 ext_in_unexpected_c Used if the cause of incoming external handover is not recognised or not mentioned at all 5A 90 ext_in_switch_crc_pool_c Switch circuit pool 32 50 5B 91 ext_in_pre_empt_c Preemption 29 41 5C 92 ext_in_bsc_trho_c Traffic F 15 5D 93 ext_in_isho_c Used if the incoming external handover is an inter–system handover 5E 94 ext_in_int_ho_to_ext_c Traffic F 15 5F 95 ext_in_dtm_no_res_avail_c Traffic load 28 40 60 96 ext_in_dtm_traffic_c Traffic F 15 64 100 ext_out_dl_rxlev_c Downlink strength 5 5 65 101 ext_out_ul_rxlev_c Uplink strength 3 3 66 102 ext_out_dl_rxqual_c Downlink quality 4 4 67 103 ext_out_ul_rxqual_c Uplink quality 2 2 68 104 ext_out_dl_interf_c Downlink quality 4 4 69 105 ext_out_ul_interf_c Uplink quality 2 2 64 106 ext_out_distance_c Distance 6 6 6B 107 ext_out_pbgt_ho_c Better cell C 12 6C 108 ext_out_umbrella_ho_c Better cell C 12 DN9814277 Id:0900d805808c0d79 Confidential 47 .Call Related DX Causes in BSC DX and BSSMAP cause mapping 5 DX and BSSMAP cause mapping The purpose of the following tables is to help the user to determine the relations between DX causes and BSSMAP causes. DX and BSSMAP cause mapping Call Related DX Causes in BSC HEX Dec DX cause BSSMAP cause HEX DEC 6D 109 ext_out_forced_ho_c O and M intervention 7 7 6E 110 ext_out_dr_ho_c Directed retry D 13 6F 111 ext_out_tr_ho_c Response to MSC invocation 8 8 70 112 ext_out_idr_ho_c Directed retry D 13 71 113 ext_out_pre_empt_ho_c Response to MSC invocation 8 8 72 114 ext_out_rap_fld_drop_c Uplink strength 3 3 73 115 ext_out_low_distance_c Distance 6 6 74 116 ext_out_switch_crc_pool_c Switch circuit pool 32 50 75 117 ext_out_slow_moving_ms_c Better cell C 12 76 118 ext_out_det_slow_mov_ms_c Better cell C 12 77 119 ext_out_det_fast_mov_ms_c Better cell C 12 78 120 inter_dl_rxlev_c Downlink strength 5 5 79 121 inter_ul_rxlev_c Uplink strength 3 3 7A 122 inter_dl_rxqual_c Downlink quality 4 4 7B 123 inter_ul_rxqual_c Uplink quality 2 2 7C 124 inter_dl_interf_c Downlink quality 4 4 7D 125 inter_ul_interf_c Uplink quality 2 2 7E 126 inter_distance_c Distance 6 6 7F 127 inter_pbgt_ho_c Better cell C 12 80 128 inter_umbrella_ho_c Better cell C 12 81 129 inter_forced_ho_c O and M intervention 7 7 82 130 inter_dr_ho_c Directed retry D 13 83 131 inter_tr_ho_c Response to MSC invocation 8 8 84 132 inter_idr_ho_c Directed retry D 13 85 133 inter_pre_empt_ho_c Response to MSC invocation 8 8 86 134 inter_rap_fld_drop_c Uplink strength 3 3 87 135 inter_low_distance_c Distance 6 6 88 136 inter_ok_ci_ratio_c Downlink quality 4 4 89 137 inter_bad_ci_ratio_c Downlink quality 4 4 8A 138 inter_slow_moving_ms_c Better cell C 12 8B 139 inter_det_slow_mov_ms_c Better cell C 12 8C 140 intra_dl_interf_c Downlink quality 4 4 8D 141 intra_ul_interf_c Uplink quality 2 2 8E 142 intra_forced_ho_c O and M intervention 7 7 8F 143 intra_dl_rxqual_c Downlink quality 4 4 90 144 intra_ok_ci_ratio_c Downlink quality 4 4 91 145 intra_bad_ci_ratio_c Downlink quality 4 4 92 146 intra_pre_empt_ho_c Response to MSC invocation 8 8 48 Id:0900d805808c0d79 Confidential DN9814277 . Call Related DX Causes in BSC DX and BSSMAP cause mapping HEX Dec DX cause BSSMAP cause HEX DEC 93 147 intra_distance_c Distance 6 6 94 148 intra_low_distance_c Distance 6 6 95 149 intra_dr_ho_c Directed retry D 13 96 150 intra_direct_access Downlink strength 5 5 97 151 intra_gprs_ho_c Traffic F 15 98 152 intra_ho_to_amr_hr_c Better cell C 12 99 153 intra_ho_to_amr_fr_c Better cell C 12 9A 154 intra_inter_band_tch_c Traffic F 15 9B 155 intra_inter_band_sdc_c Traffic F 15 9C 156 inter_det_fast_mov_ms_c Better cell C 12 9D 157 inter_erfd_ho_c Better cell C 12 9E 158 inter_direct_access_c Downlink strength 5 5 9F 159 inter_bsc_trho_c Traffic F 15 A0 160 inter_dadlb_c Traffic F 15 A2 162 inter_dtm_no_res_avail_c Traffic load 28 40 A3 163 ext_out_erfd_ho_c Better cell C 12 A4 164 ext_out_bsc_trho_c Traffic F 15 A6 166 intra_inter_bts_type_tch_c Traffic F 15 A7 167 intra_inter_bts_type_sdc_c Traffic F 15 A8 168 intra_ho_due_to_hscsd_c Traffic F 15 A9 169 intra_inter_band_due_lev_c Downlink strength 5 5 AA 170 intra_dtm_mo_cs_to_ps_c Traffic F 15 AB 171 intra_dtm_mt_cs_to_ps_c Traffic F 15 AC 172 intra_dtm_mt_ps_to_ps_c Traffic F 15 AD 173 intra_dtm_ps_to_cs_c Traffic F 15 AE 174 intra_lrtch_ho_to_norm_c O and M intervention 7 7 AF 175 intra_lrtch_ho_to_ext_c O and M intervention 7 7 B3 179 intra_ho_from_hr_to_dhr_c Better cell C 12 B4 180 intra_ho_from_fr_to_dhr_c Better cell C 12 B5 181 intra_dhr_rxqual_dmux_ho_c Better cell C 12 B6 182 intra_rxlev_diff_dmux_ho_c Better cell C 12 B7 183 intra_dhr_rxlev_dmux_ho_c Better cell C 12 B8 184 intra_ho_from_fr_to_dfr_c Better cell C 12 B9 185 intra_dfr_rxqual_dmux_ho_c Better cell C 12 BA 186 intra_dfr_rxl_df_dmux_ho_c Better cell C 12 BB 187 intra_dfr_rxlev_dmux_ho_c Better cell C 12 BC 188 intra_mcpa_pbho_tch_c Better cell C 12 BE 190 ext_out_isho_c Traffic F 15 DN9814277 Id:0900d805808c0d79 Confidential 49 . reversion to old channel A 10 133 307 block_slave_c Equipment failure 20 32 134 308 ch_act_nack_c Radio interface failure 1 1 135 309 ch_act_nack_om_inter_c O and M intervention 7 7 136 310 ch_act_nack_equip_fail_c Equipment failure 20 32 137 311 ch_act_nack_encryp_alg_c Ciphering algorithm not supported 40 64 138 312 ch_act_nack_rad_ch_alr_a_c No radio resource available 21 33 139 313 ch_act_nack_serv_not_ava_c Requested transcoding/rate adaption unavailable 30 48 13A 314 ch_act_fail_c Equipment failure 20 32 13B 315 conn_fail_c Radio interface failure 1 1 13C 316 conn_fail_rad_inf_fail_c Radio interface failure 1 1 13D 317 conn_fail_rad_link_fail_c Radio interface failure 1 1 13E 318 conn_fail_rem_trans_fail_c Equipment failure 20 32 13F 319 data_ind_corrup_c Radio interface message failure 0 0 140 320 err_ind_c Radio interface failure 1 1 141 321 estab_ind_fail_c Radio interface message failure 0 0 142 322 estab_conf_fail_c Radio interface message failure 0 0 50 Id:0900d805808c0d79 Confidential DN9814277 .DX and BSSMAP cause mapping Call Related DX Causes in BSC HEX Dec DX cause BSSMAP cause HEX DEC BF 191 ext_out_inter_system_da_c Directed retry D 13 C0 192 ext_out_ibho_to_gsm_c Traffic load 28 40 C1 193 ext_out_ibho_to_utran_c Traffic F 15 C2 194 ext_out_int_ho_to_ext_c Traffic F 15 C3 195 ext_out_dtm_no_res_avail_c Traffic load 28 40 C4 196 ext_out_dtm_disabled_c Traffic F 15 C5 197 ext_out_pcu_qual_cntrl_c Traffic F 15 C6 198 ext_out_dtm_ho_to_dtm_c Call control 9 9 C7 199 ext_out_dtm_ho_to_wcdma_c Traffic F 15 F0 240 inter_dtm_disabled_c Traffic F 15 F1 241 inter_pcu_qual_cntrl_c Traffic F 15 F2 242 inter_dtm_ho_to_dtm_c Call control 9 9 F3 243 inter_mss_trg_bss_int_ho_c Response to an Internal Handover Enquiry Message 16 10 12C 300 user_act_block_c O and M intervention 7 7 12D 301 netw_act_block_c O and M intervention 7 7 12E 302 bts_fail_block_c Equipment failure 20 32 12F 303 lapd_fail_block_c Equipment failure 20 32 130 304 abis_fail_block_c Equipment failure 20 32 131 305 abis_msg_corrup_to_bts_ c Equipment failure 20 32 132 306 ass_fail_msg_c Radio interface failure. reversion to old channel A 10 DN9814277 Id:0900d805808c0d79 Confidential 51 . reversion to old channel A 10 144 324 ho_detect_fail_c Radio interface message failure 0 0 145 325 mode_mod_nack_c BSS not equipped 25 37 146 326 mode_mod_ack_fail_c Radio interface message failure 0 0 147 327 no_meas_result_c Radio interface failure 1 1 148 328 no_resp_from_copro_c Equipment failure 20 32 149 329 phy_cont_conf_fail_c Radio interface message failure 0 0 14A 330 rcs_alg_start_ack_fail_c Equipment failure 20 32 14B 331 rcs_alg_cl_ack_fail_c Equipment failure 20 32 14C 332 rc0_disco_ind_c Equipment failure 20 32 14D 333 rf_ch_rel_ack_fail_c Radio interface failure 1 1 14E 334 rel_ind_c Radio interface failure 1 1 14F 335 rel_ind_fail_c Radio interface message failure 0 0 150 336 signalling_error_c Radio interface failure 1 1 151 337 state_confligt_c Equipment failure 20 32 152 338 type_confligt_c Equipment failure 20 32 153 339 forced_rel_c Preemption 29 41 154 340 rej_phantom_res_c Radio interface message failure 0 0 155 341 overload_c CCCH overload 23 35 156 342 abi_switchover_c O and M intervention 7 7 157 343 sapi_3_fail_c Radio interface failure 1 1 158 344 paging_msg_fail_c Radio interface message failure 0 0 159 345 ch_required_fail_c Radio interface message failure 0 0 15A 346 mode_mod_nack_equip_fail_c Equipment failure 20 32 15B 347 mode_mod_nack_trc_rat_un_c Requested transcoding/rate adaption unavailable 30 48 15C 348 rrm_serv_req_nack_c No radio resource available 21 33 15D 349 ch_mode_mod_fail_c Radio interface failure 1 1 15E 350 ass_fail_c Radio interface message failure 0 0 15F 351 dr_fail_c No radio resource available 21 33 160 352 coprocess_fail_c Radio interface failure 1 1 161 353 err_rep_enc_alg_not_imp_c Ciphering algorithm not supported 40 64 162 354 error_report_c Radio interface failure 1 1 163 355 ch_act_nack_ch_mode_err_c Requested transcoding/rate adaption unavailable 30 48 164 356 ch_act_nack_gen_ie_err_c Radio interface message failure 0 0 165 357 speech_version_unavail_c Radio interface failure.Call Related DX Causes in BSC DX and BSSMAP cause mapping HEX Dec DX cause BSSMAP cause HEX DEC 143 323 ho_fail_c Radio interface failure. DX and BSSMAP cause mapping Call Related DX Causes in BSC HEX Dec DX cause BSSMAP cause HEX DEC 166 358 ignored_double_rand_acc_c Radio interface message failure 0 0 167 359 rtsl_reconf_fail_c No radio resource available 21 33 168 360 ho_interrupted_c Equipment failure 20 32 169 361 downgrade_c Equipment failure 20 32 16A 362 ho_not_started_c Equipment failure 20 32 16B 363 conf_change_not_allowed_c Equipment failure 20 32 16C 364 conf_change_bts_fail_c BSS not equipped 25 37 16D 365 conf_change_ms_fail_c Radio interface failure 1 1 16E 366 hscsd_copro_fail_c Equipment failure 20 32 16F 367 sub_timer_c Equipment failure 20 32 170 368 forced_ho_block_c O and M intervention 7 7 171 369 upgrade_fail_c Equipment failure 20 32 172 370 estab_ind_corrupted_c Radio interface message failure 0 0 175 373 bsc_bsc_conflict_c Call control 9 9 176 374 cn_id_not_found_c Equipment failure 20 32 177 375 ciph_not_support_trx_c Ciphering algorithm not supported 40 64 178 376 dfca_hop_prm_not_valid_c Equipment failure 20 32 179 377 etp_failure_c Equipment Failure 20 32 190 400 timing_advance_c Distance 6 6 191 401 rrm_switch_crc_pool_c Switch circuit pool 32 50 192 402 rrm_speech_ver_unavail_c Requested speech version unavailable 33 51 193 403 rrm_bts_not_supporting_c Requested transcoding/rate adaption unavailable 30 48 194 404 rrm_ms_not_supporting_c MS not equipped 26 38 195 405 rrm_invalid_cell_c Invalid cell 27 39 199 409 unavail_codec_type_conf_c Requested Codec Type or Codec Configuration unavailable 35 23 1F4 500 ho_not_allowed_c Call control 9 9 1F5 501 no_radio_res_avail_c No radio resource available 21 33 1F7 503 no_resp_from_coprocess_c Equipment failure 20 32 1F8 504 no_resp_to_radio_res_req_c Equipment failure 20 32 1F9 505 has_state_confligt_c Equipment failure 20 32 1FA 506 clear_cmd_not_received_c Radio interface message failure 0 0 1FB 507 ms_is_lost_c Radio interface message failure 0 0 1FC 508 no_resp_to_ho_cpl_msg_c Equipment failure 20 32 1FD 509 has_switchover_c O and M intervention 7 7 1FE 510 target_fail_c Call control 9 9 1FF 511 source_fail_c Call control 9 9 52 Id:0900d805808c0d79 Confidential DN9814277 Call Related DX Causes in BSC DX and BSSMAP cause mapping HEX Dec DX cause BSSMAP cause HEX DEC 200 512 has_call_control_c Call control 9 9 201 513 adj_cell_id_err_c Invalid cell 27 39 258 600 aiv_hand_act_fail_c Equipment failure 20 32 259 601 aiv_ssp_c Call control 9 9 25A 602 sccp_conn_fail_c Call control 9 9 25B 603 sccp_conn_timeout_c Call control 9 9 25C 604 sccp_release_c Call control 9 9 25E 606 global_reset_c Call control 9 9 261 609 ho_denied_assign_c Call control 9 9 262 610 ho_denied_ciphering_c Call control 9 9 263 611 ho_denied_clear_c Call control 9 9 264 612 ho_denied_no_sccp_conn_c Call control 9 9 265 613 T7_expiry_c Call control 9 9 266 614 T10_expiry_c Equipment failure 20 32 267 615 aiv_crct_res_timeout_c Equipment failure 20 32 268 616 aiv_crct_conn_timeout_c Equipment failure 20 32 269 617 aiv_crct_disconn_timeout_c Equipment failure 20 32 26A 618 aiv_crct_rel_timeout_c Equipment failure 20 32 26B 619 aiv_timeout_c Equipment failure 20 32 26C 620 act_ctrl_timeout_c Equipment failure 20 32 26D 621 invalid_bssmap_msg_c Protocol error between BSS and MSC 60 96 26E 622 unknown_a_pcm_c Requested terrestrial resource unavailable 22 34 26F 623 ho_denied_no_proper_crc_c Call control 9 9 270 624 ch_type_mismatch_c Invalid message contents 51 81 271 625 aiv_transc_or_rate_unava_c Requested transcoding/rate adaption unavailable 30 48 272 626 aiv_speech_version_unava_c Invalid message contents 51 81 273 627 aiv_pagin_refus_big_load_c Call control 9 9 274 628 aiv_conn_refresh_timeout_c Equipment failure 20 32 275 629 aiv_conn_refresh_failed_c Equipment failure 20 32 276 630 no_support_a_if_type_c Requested A-Interface Type not supported 45 2D 277 631 no_supp_redundancy_level_c Requested Redundancy Level not supported 46 2E 278 632 no_supp_codec_type_conf_c Requested Codec Type or Codec Configuration not supported 44 2C 279 633 unavail_a_if_type_c Requested A-Interface Type unavailable 36 24 DN9814277 Id:0900d805808c0d79 Confidential 53 DX and BSSMAP cause mapping Call Related DX Causes in BSC HEX Dec DX cause BSSMAP cause HEX DEC 27A 634 t25_timer_expiry_c Call Control 9 9 2BC 700 rc0_hand_act_fail_c Equipment failure 20 32 2BD 701 a_crct_alr_res_c Terrestrial circuit already allocated 50 80 2BE 702 a_crct_conn_err_c Equipment failure 20 32 2BF 703 rc0_crct_conn_timeout_c Equipment failure 20 32 2C0 704 access_out_of_crct_tbl_c Equipment failure 20 32 2C1 705 a_crct_rel_err_c Equipment failure 20 32 2C2 706 rc0_transc_or_rate unava_c Requested transcoding/rate adaption unavailable 30 48 2C3 707 rc0_cip_type_mismatch_c Switch circuit pool 32 50 2C4 708 rc0_inv_msg_contents_c Invalid message contents 51 81 2C5 709 rc0_req_speech_ver_unava_c Requested speech version unavailable 33 51 2C6 710 rc0_hunting_queue_full_c Traffic load 28 40 2C7 711 rc0_a_crct_congestion_c Equipment failure 20 32 2C8 712 rc0_a_search_error_c Traffic load 28 40 2C9 713 rc0_crct_pool_mismatch_c Equipment failure 20 32 2CA 714 rc0_rej_due_eme_call_c Traffic load 28 40 2CB 715 rc0_ilc_file_error_c Equipment failure 20 32 2CC 716 a_crct_conn_err_consec_c Equipment failure 20 32 2CD 717 call_id_alr_allocated_c Call Identifier already allocated 57 39 2CE 718 unavail_terr_resource _c Requested terrestrial resource unavailable 22 16 320 800 a_tsl_user_mismatch_c Equipment failure 20 32 321 801 sc7_crct_res_timeout_c Equipment failure 20 32 322 802 sc7_crct_conn_timeout_c Equipment failure 20 32 323 803 sc7_crct_disconn_timeout_c Equipment failure 20 32 324 804 sc7_crct_rel_timeout_c Equipment failure 20 32 325 805 a_tsl_blocked_c Requested terrestrial resource unavailable 22 34 326 806 a_tsl_status_unknown_c Requested terrestrial resource unavailable 22 34 327 807 lsi_access_fail_c Equipment failure 20 32 328 808 scc_access_fail_c Equipment failure 20 32 329 809 undef_tsl_in_lsi_c Requested terrestrial resource unavailable 22 34 32A 810 crct_equipment_fail_c Equipment failure 20 32 32B 811 reset_crct_c Response to MSC invocation 8 8 32D 813 sc7_ssp_c Call control 9 9 32F 815 a_pcm_fault_c Equipment failure 20 32 54 Id:0900d805808c0d79 Confidential DN9814277 reversion to old channel A 10 38F 911 m_handover_succ_c Handover successful B 11 390 912 m_better_cell_c Better cell C 12 391 913 m_directed_retry_c Directed retry D 13 392 914 m_equipment_fail_c Equipment failure 20 32 393 915 m_no_radio_res_avail_c No radio resource available 21 33 394 916 m_req_terr_res_unava_c Requested terrestrial resource unavailable 22 34 395 917 m_cch_overload_c CCCH overload 23 35 396 918 m_processor_overload_c Processor overload 24 36 397 919 m_bss_not_equipped_c BSS not equipped 25 37 398 920 m_ms_not_eqipped_c MS not equipped 26 38 399 921 m_tr_cod_rat_ad_unav_c Requested transcoding/rate adaption unavailable 30 48 39A 922 m_ciph_alg_not_supp_c Ciphering algorithm not supported 40 64 39B 923 m_terr_chan_alr_allc_c Terrestrial circuit already allocated 50 80 39C 924 m_prot_err_b_bsc_msc_c Protocol error between BSS and MSC 60 96 39E 926 m_invalid_cell_c Invalid cell 27 39 39F 927 m_invalid_msg_cont_c Invalid message contents 51 81 3A0 928 m_ie_or_field_missing_c Information element or field missing 52 82 3A1 929 m_incorrect_value_c Incorrect value 53 83 3A2 930 m_unknown_msg_type_c Unknown message type 54 84 3A3 931 m_unknown_ie_c Unknown information element 55 85 3A5 933 m_cip_type_mismatch_c Circuit pool mismatch 31 49 DN9814277 Id:0900d805808c0d79 Confidential 55 .Call Related DX Causes in BSC DX and BSSMAP cause mapping HEX Dec DX cause BSSMAP cause HEX DEC 331 817 a_crct_removed_c O and M intervention 7 7 333 819 a_et_state_change_c O and M intervention 7 7 384 900 m_radio_if_mess_fail_c Radio interface message failure 0 0 385 901 m_radio_if_fail_c Radio interface failure 1 1 386 902 m_uplink_quality_c Uplink quality 2 2 387 903 m_uplink_strength_c Uplink strength 3 3 388 904 m_downlink_quality_c Downlink quality 4 4 389 905 m_downlink_strength_c Downlink strength 5 5 38A 906 m_distance_c Distance 6 6 38B 907 m_o_and_m_inter_c O and M intervention 7 7 38C 908 m_resp_to_msc_invoc_c Response to MSC invocation 8 8 38D 909 m_call_control_c Call control 9 9 38E 910 m_r_if_f_rev_to_old_c Radio interface failure. DX and BSSMAP cause mapping Call Related DX Causes in BSC HEX Dec DX cause BSSMAP cause HEX DEC 3A6 934 m_switch_circuit_pool_c Switch circuit pool 32 50 3A7 935 m_speech_version_unavail_c Requested speech version unavailable 33 51 3A8 936 m_pre_empt_c Preemption 29 41 3A9 937 m_traffic_c Traffic F 15 3AA 938 m_traffic_load_c Traffic load 28 40 3AD 941 m_no_supp_codec_typ_conf_c Requested Codec Type or Codec Configuration not supported 44 2C 3AE 942 m_no_support_a_if_type_c Requested A-Interface Type not supported 45 2D 3AF 943 m_unavail_a_if_type_c Requested A-Interface Type unavailable 36 54 3B0 944 m_unavail_codec_typ_conf_c Requested Codec Type or Codec Configuration unavailable 35 23 3B1 945 m_no_supp_redundancy_lvl_c Requested Redundancy Level not supported 46 2E 5. The third column lists the cause fields of the DX causes which bring about a BSSMAP cause on the A interface. The BSSMAP causes and their hexadecimal values are listed in the first two columns.2 BSSMAP causes mapped to DX causes The following table shows which DX causes trigger a particular BSSMAP cause. BSSMAP cause HEX DX cause DEC Radio interface message failure 0x00 data_ind_corrup_c 319 estab_ind_fail_c 321 estab_conf_fail_c 322 ho_detect_fail_c 324 mode_mod_ack_fail_c 326 phy_cont_conf_fail_c 329 rel_ind_fail_c 335 rej_phanton_res_c 340 paging_msg_fail_c 344 ch_required_fail_c 345 ass_fail_c 350 ch_act_nack_gen_err_c 356 ignored_double_rand_acc_c 358 estab_ind_corrupted_c 370 clear_cmd_not_received_c 506 ms_is_lost_c 507 m_radio_if_mess_fail_c 900 56 Id:0900d805808c0d79 Confidential DN9814277 . Call Related DX Causes in BSC DX and BSSMAP cause mapping BSSMAP cause HEX DX cause DEC Radio interface failure 0x01 ch_act_nack_c 308 conn_fail_c 315 conn_fail_rad_inf_fail_c 316 conn_fail_rad_link_fail_c 317 err_ind_c 320 no_meas_result_c 327 rf_ch_rel_ack_fail_c 333 rel_ind_c 334 signalling_error_c 336 sapi_3_fail_c 343 ch_mode_mod_fail_c 349 coprocess_fail_c 352 error_report_c 354 conf_change_ms_fail_c 365 m_radio_if_fail_c 901 ext_out_ul_quality_c 80 ext_out_ul_rxqual_c 103 ext_out_ul_interf_c 105 inter_ul_rxqual_c 123 inter_ul_interf_c 125 intra_ul_interf_c 141 m_uplink_quality_c 902 ext_in_ul_strength_c 81 ext_out_ul_rxlev_c 101 ext_out_rap_fld_drop_c 114 inter_ul_rxlev_c 121 inter_rap_fld_drop_c 134 m_uplink_strength_c 903 Uplink quality Uplink strength DN9814277 0x02 0x03 Id:0900d805808c0d79 Confidential 57 . DX and BSSMAP cause mapping Call Related DX Causes in BSC BSSMAP cause HEX DX cause DEC Downlink quality 0x04 ext_in_dl_quality_c 82 ext_out_dl_rxqual_c 102 ext_out_dl_interf_c 104 inter_dl_rxqual_c 122 inter_dl_interf_c 124 inter_ok_ci_ratio_c 136 inter_bad_ci_ratio_c 137 intra_dl_interf_c 140 intra_dl_rxqual_c 143 intra_ok_ci_ratio_c 144 intra_bad_ci_ratio_c 145 m_downlink_quality_c 904 ext_in_dl_strength_c 83 ext_out_dl_rxlev_c 100 inter_dl_rxlev_c 120 intra_direct_access_c 150 inter_direct_access_c 158 intra_inter_band_due_lev_c 169 m_downlink_strength_c 905 ext_in_distance_c 84 ext_out_distance_c 106 ext_out_low_distance_c 115 inter_distance_c 126 inter_low_distance_c 135 intra_distance_c 147 intra_low_distance_c 148 timing_advance_c 400 m_distance_c 906 Downlink strength Distance 58 0x05 0x06 Id:0900d805808c0d79 Confidential DN9814277 . Call Related DX Causes in BSC DX and BSSMAP cause mapping BSSMAP cause HEX DX cause DEC O and M intervention 0x07 ext_in_o_and_m_inter_c 85 ext_out_forced_ho_c 109 inter_forced_ho_c 129 intra_forced_ho_c 142 intra_lrtch_ho_to_norm_c 174 intra_lrtch_ho_to_ext_c 175 user_act_block_c 300 netw_acct_block_c 301 ch_act_nack_om_inter_c 309 abi_switchover_c 342 forced_ho_block_c 368 has_switchover_c 509 a_crct_removed_c 817 a_et_state_change_c 819 m_o_and_m_inter_c 907 ext_in_resp_to_msc_invoc_c 86 ext_out_tr_ho_c 111 ext_out_pre_empt_ho_c 113 inter_tr_ho_c 131 inter_pre_empt_ho_c 133 intra_pre_empt_ho_c 146 reset_crct_c 811 m_resp_to_msc_invoc_c 908 Response to MSC invocation DN9814277 0x08 Id:0900d805808c0d79 Confidential 59 . DX and BSSMAP cause mapping Call Related DX Causes in BSC BSSMAP cause HEX DX cause DEC Call control 0x09 ext_out_dtm_ho_to_dtm_c 198 inter_dtm_ho_to_dtm_c 242 bsc_bsc_conflict_c 373 ho_not_allowed_c 500 target_fail_c 510 source_fail_c 511 has_call_control_c 512 aiv_ssp_c 601 sccp_conn_fail_c 602 sccp_conn_timeout_c 603 sccp_release_c 604 global_reset_c 606 no_dtap_from_msc_c 608 ho_denied_assign_c 609 ho_denied_ciphering_c 610 ho_denied_clear_c 611 ho_denied_no_sccp_conn_c 612 T7_expiry_c 613 ho_denied_no_proper_crc_c 623 aiv_pagin_refus_big_load_c 627 t25_timer_expiry_c 634 sc7_ssp_c 813 m_call_control_c 909 ass_fail_msg_c 306 ho_fail_c 323 m_r_if_f_rev_to_old_c 910 m_handover_succ_c 911 Radio interface failure. reversion to old channel Handover successful 60 0x0A 0x0B Id:0900d805808c0d79 Confidential DN9814277 . Call Related DX Causes in BSC DX and BSSMAP cause mapping BSSMAP cause HEX DX cause DEC Better cell 0x0C ext_in_better_cell_c 87 ext_out_pbgt_ho_c 107 ext_out_umbrella_ho_c 108 ext_out_slow_moving_ms_c 117 ext_out_det_slow_mov_ms_c 118 ext_out_det_fast_mov_ms_c 119 inter_pbgt_ho_c 127 inter_umbrella_ho_c 128 inter_slow_moving_ms_c 138 inter_det_slow_mov_ms_c 139 intra_ho_to_amr_hr_c 152 intra_ho_to_amr_fr_c 153 inter_erfd_ho_c 157 ext_out_erfd_ho_c 163 intra_ho_from_hr_to_dhr_c 179 intra_ho_from_fr_to_dhr_c 180 intra_dhr_rxqual_dmux_ho_c 181 intra_rxlev_diff_dmux_ho_c 182 intra_dhr_rxlev_dmux_ho_c 183 intra_ho_from_fr_to_dfr_c 184 intra_dfr_rxqual_dmux_ho_c 185 intra_dfr_rxl_df_dmux_ho_c 186 intra_dfr_rxlev_dmux_ho_c 187 intra_mcpa_pbho_tch_c 188 m_better_cell_c 912 ext_in_directed_retry_c 88 ext_out_dr_ho_c 110 ext_out_idr_ho_c 112 inter_dr_ho_c 130 inter_idr_ho_c 132 intra_dr_ho_c 149 ext_out_inter_system_da_c 191 m_directed_retry_c 913 Directed retry DN9814277 0x0D Id:0900d805808c0d79 Confidential 61 . DX and BSSMAP cause mapping Call Related DX Causes in BSC BSSMAP cause HEX DX cause DEC Traffic 0x0F ext_in_bsc_trho_c 92 ext_in_int_ho_to_ext_c 94 ext_in_dtm_traffic_c 96 intra_gprs_ho_c 151 intra_inter_band_tch_c 154 intra_inter_band_sdc_c 155 inter_bsc_trho_c 159 inter_dadlb_c 160 ext_out_bsc_trho_c 164 intra_inter_bts_type_tch_c 166 intra_inter_bts_type_sdc_c 167 intra_ho_due_to_hscsd_c 168 intra_dtm_mo_cs_to_ps_c 170 intra_dtm_mt_cs_to_ps_c 171 intra_dtm_mt_ps_to_ps_c 172 intra_dtm_ps_to_cs_c 173 ext_out_isho_c 190 ext_out_ibho_to_utran_c 193 ext_out_int_ho_to_ext_c 194 ext_out_dtm_disabled_c 196 ext_out_pcu_qual_cntrl_c 197 ext_out_dtm_ho_to_wcdma_c 199 inter_dtm_disabled_c 240 inter_pcu_qual_cntrl_c 241 m_traffic_c 937 62 Id:0900d805808c0d79 Confidential DN9814277 . Call Related DX Causes in BSC DX and BSSMAP cause mapping BSSMAP cause HEX DX cause DEC Equipment failure 0x20 bts_fail_block_c 302 lapd_fail_block_c 303 abis_fail_block_c 304 abis_msg_corrup_to_bts_c 305 block_slave_c 307 ch_act_nack_equip_fail_c 310 ch_act_fail_c 314 conn_fail_rem_trans_fail_c 318 no_resp_from_copro_c 328 rcs_alg_start_ack_fail_c 330 rcs_alg_cl_ack_fail_c 331 rc0_disco_ind_c 332 state_confligt_c 337 type_confligt_c 338 mode_mod_nack_equip_fail_c 346 ho_interrupted_c 360 downgrade_c 361 ho_no_started_c 362 conf_change_not_allowed_c 363 hscsd_copro_fail_c 366 sub_timer_c 367 upgrade_fail_c 369 cn_id_not_found_c 374 dfca_hop_prm_not_valid_c 376 etp_failure_c 377 no_resp_from_coprocess_c 503 no_resp_to_radio_res_req_c 504 has_state_confligt_c 505 no_resp_to_ho_cpl_msg_c 508 aiv_hand_act_fail_c 600 T10_expiry_c 614 aiv_crct_res_timeout_c 615 aiv_crct_conn_timeout_c 616 aiv_crct_disconn_timeout_c 617 aiv_crct_rel_timeout_c 618 aiv_timeout_c 619 act_ctrl_timeout_c 620 aiv_conn_refresh_timeout_c 628 aiv_conn_refresh_failed_c 629 DN9814277 Id:0900d805808c0d79 Confidential 63 . DX and BSSMAP cause mapping BSSMAP cause No radio resource available Call Related DX Causes in BSC HEX 0x21 Requested terrestrial resource unavailable 0x22 CCCH overload 0x23 DX cause DEC a_crct_conn_err_c 702 rc0_crct_conn_timeout_c 703 access_out_of_crct_tbl_c 704 a_crct_rel_err_c 705 rc0_a_crct_congestion_c 711 rc0_crct_pool_mismatch_c 713 rc0_ilc_file_error_c 715 a_crct_conn_err_consec_c 716 a_tsl_user_mismatch_c 800 sc7_crct_res_timeout_c 801 sc7_crct_conn_timeout_c 802 sc7_crct_disconn_timeout_c 803 sc7_crct_rel_timeout_c 804 lsi_access_fail_c 807 scc_access_fail_c 808 crct_equipment_fail_c 810 a_pcm_fault_c 815 m_equipment_fail_c 914 ch_act_nack_rad_ch_alr_a_c 312 rrm_serv_req_nack_c 348 dr_fail_c 351 rtsl_reconf_fail_c 359 no_radio_res_avail_c 501 m_no_radio_res_avail_c 915 unknown_a_pcm_c 622 unavail_terr_resource _c 718 a_tsl_blocked_c 805 a_tsl_status_unknown_c 806 undef_tsl_in_lsi_c 809 m_req_terr_res_unava_c 916 overload_c 341 m_cch_overload_c 917 Processor overload 0x24 m_processor_overload_c 918 BSS not equipped 0x25 mode_mod_nack_c 325 conf_change_bts_fail_c 364 m_bss_not_equipped_c 919 rrm_ms_not_supporting_c 404 m_ms_not_equipped_c 920 MS not equipped 64 0x26 Id:0900d805808c0d79 Confidential DN9814277 . Call Related DX Causes in BSC DX and BSSMAP cause mapping BSSMAP cause HEX DX cause DEC Invalid cell 0x27 rrm_invalid_cell_c 405 m_invalid_cell_c 926 ext_in_dtm_no_res_avail_c 95 inter_dtm_no_res_avail_c 162 ext_out_ibho_to_gsm_c 192 ext_out_dtm_no_res_avail_c 195 rc0_hunting_queue_full_c 710 rc0_a_search_error_c 712 rc0_rej_due_eme_call_c 714 m_traffic_load_c 938 ext_in_pre_empt_c 91 forced_rel_c 339 m_pre_empt_c 936 ch_act_nack_serv_not_ava_c 313 mode_mod_nack_trc_rat_un_c 347 ch_act_nack_ch_mode_err_c 355 rrm_bts_not_supporting_c 403 aiv_transc_or_rate_unava_c 625 rc0_transc_or_rate_unava_c 706 m_tr_cod_rat_ad_unav_c 921 Traffic load Preemption Requested transcoding/rate adaption unavailable 0x28 0x29 0x30 Circuit pool mismatch 0x31 m_cip_type_mismatch_c 933 Switch circuit pool 0x32 ext_in_switch_crc_pool_c 90 ext_out_switch_crc_pool_c 116 rrm_switch_src_pool_c 401 rc0_cip_type_mismatch_c 707 m_switch_crc_pool_c 934 rrm_speech_ver_unavail_c 402 rc0_req_speech_ver_unava_c 709 m_speech_version_unavail_c 935 ch_act_nack_encryp_alg_c 311 err_rep_enc_alg_not_imp_c 353 ciph_not_support_trx_c 375 m_ciph_alg_not_supp_c 922 a_crct_alr_res_c 701 m_terr_chan_alr_allc_c 923 Requested speech version unavailable Ciphering algorithm not supported Terrestrial circuit already allocated DN9814277 0x33 0x40 0x50 Id:0900d805808c0d79 Confidential 65 . DX and BSSMAP cause mapping Call Related DX Causes in BSC BSSMAP cause HEX DX cause DEC Invalid message contents 0x51 ch_type_mismatch_c 624 aiv_speech_version_unava_c 626 rc0_inv_msg_contents_c 708 m_invalid_msg_cont_c 927 Information element or field missing 0x52 m_ie_or_field_missing_c 928 Incorrect value 0x53 m_incorrect_value_c 929 Unknown message type 0x54 m_unkown_msg_type_c 930 Unknown information element 0x55 m_unknown_ie_c 931 Protocol error between BSS and MSC 0x60 invalid_bssmap_msg_c 621 m_prot_err_b_bsc_msc_c 924 unavail_a_if_type_c 633 m_unavail_a_if_type_c 943 no_support_a_if_type_c 630 m_no_support_a_if_type_c 942 Requested Codec Type or Codec Configu- 0x35 ration unavailable unavail_codec_type_conf_c 409 m_unavail_codec_typ_conf_c 944 Requested Codec Type or Codec Configu- 0x44 ration not supported no_supp_codec_type_conf_c 632 m_no_supp_codec_typ_conf_c 941 Requested Redundancy Level not supported 0x46 no_supp_redundancy_level_c 631 m_no_supp_redundancy_lvl_c 945 Response to an Internal Handover Enquiry Message 0x16 inter_mss_trg_bss_int_ho_c 243 Call Identifier already allocated 0x57 call_id_alr_allocated_c 717 Requested A-Interface Type unavailable 0x36 Requested A-Interface Type not supported 0x45 66 Id:0900d805808c0d79 Confidential DN9814277 Call Related DX Causes in BSC DX causes in BSC statistics 6 DX causes in BSC statistics The information in DX causes can be examined using the measurements and observations of BSC Statistics. The following methods can be used: • • • • • using clear code counters on BSC basis, divided into different phases (50 BSC Level Clear Code Measurement) using BSC counters on BSC basis (51 BSC Level Clear Code (PM) Measurement) using BSC counters on cell basis (57 BSC Level Clear Code (SERLEV) Measurement) using observations using counters of Traffic Measurement (1 Traffic Measurement) These measurements are described in the following sections. For more information on how to run measurements and observations, see BSC Statistics Administration. 6.1 DX causes and BSC Level Clear Code Measurement The counters of BSC Level Clear Code Measurement record failures that have occured during a call (signalling or conversation). The measurement collects the clear code counters for each of the 15 call phases (see Call phases of call related DX causes in BSC). The values of all counters are given on a BSC basis. Each counter has a corresponding failure DX cause, whose cause number is the same as the last three digits of the counter number. For example, the clear code counter 500315 CONN FAIL corresponds to the failure DX cause conn_fail_c (315). DX causes are listed in List of call related DX causes in BSC. Failure causes 902, 903, 904, 905, 906, 907, 908, 911, 912, 913, 934, 936, 937, and 938 do not update counters in BSC Level Clear Code Measurement. For more information, see 50 BSC Level Clear Code Measurement under Reference/Counters/performance indicators/Call control measurements (CS) in the PDF view. 6.2 DX causes and BSC Level Clear Code (PM) Measurement The counters of BSC Level Clear Code (PM) Measurement are divided into five different classes; there are failure counters, success counters, one BCSU counter, call attempt and call establishment cause counters, and handover counters. Counters are given on BSC basis. Most of the counters have a one-to-one correspondence with a particular DX cause. These correspondences are indicated in the counter descriptions. However, some of the counters are primarily based on 3GPP-based BSSMAP causes or establishment causes. For more information, see 51 BSC Level Clear Code (PM) Measurement under Reference/Counters/performance indicators/Call control measurements (CS) in the PDF view. DN9814277 Id:0900d805807f93e0 Confidential 67 DX causes in BSC statistics 6.3 Call Related DX Causes in BSC DX causes and BSC Level Clear Code (SERLEV) Measurement BSC Level Clear Code (SERLEV) Measurement registers statistics about clear codes in a BSC during calls on cell basis. Some of the counters correspond to several DX causes. These correspondences are not indicated in the counter descriptions, since no one-to-one correspondences exist. For more information, see 57 BSC Level Clear Code (SERLEV) Measurement under Reference/Counters/performance indicators/Call control measurements (CS) in the PDF view. 6.4 DX causes and observation report The observation report includes counters for recording the starting and ending cause and phase. The observation counters are the following: Phase in Contains the call phase for a channel seizure. Cause in Contains the DX cause that indicates the reason for a channel seizure. This can only be a success cause. Phase out Contains the call phase when a channel release is started. Cause out Contains the DX cause that indicates the reason for a channel release. This can be a success or a failure cause. The counters in different observations offer detailed information on call establishment and call clearing during handovers and basic calls: • • • • In 16 SDCCH Observation and 17 TCH Observation, the Phase in and the Cause in counters include the establishment cause. The Phase out and the Cause out counters are for the channel release cause. In 18 Handover Observation, the Phase in and the Cause in counters are for the handover starting cause. The Phase out and the Cause out counters are for the handover ending cause. In 22 Clear Code Observation, the DX cause structure includes the Phase out and the Cause out counters. In 23 Dropped Call Observation and 29 Drop Call Breakdown Observation, the Phase in and the Cause in counters include the establishment cause for the dropped call. The Phase out and the Cause out counters are for the channel release cause. When the starting cause (Cause in) is the same as the ending cause (Cause out), the event has ended successfully. Similarly, when these two variables have different cause values, the signalling in question was not successful. 6.5 DX causes and Traffic Measurement The following table lists the counters of Traffic Measurement that are incremented due to DX causes. The first two columns list the counter name and number. The last two columns list the DX cause codes and their decimal numbers. 68 Id:0900d805807f93e0 Confidential DN9814277 001034. 001036 TRANSACTIONS FAIL DUE TO RADIO FAIL 001003 ass_fail_msg_c 306 conn_fail_c 315 conn_fail_rad_inf_fail_c 316 conn_fail_rad_link_fail_c 317 err_ind_c 320 ho_fail_c 323 ho_detect_fail_c 324 ch_mode_mod_fail_c 349 ass_fail_c 350 error_report_c 354 conf_change_ms_fail_c 365 timing_advance_c 400 no_resp_from_coprocess_c 503 ms_is_lost_c 507 target_fail_c 510 source_fail_c 511 ass_fail_msg_c 306 conn_fail_c 315 conn_fail_rad_inf_fail_c 316 conn_fail_rad_link_fail_c 317 err_ind_c 320 ho_fail_c 323 ch_mode_mod_fail_c 349 ass_fail_c 350 error_report_c 354 timing_advance_c 400 no_resp_from_coprocess_c 503 ms_is_lost_c 507 target_fail_c 510 (incremented only in phases 1-8) TRANSACTIONS FAIL DUE RADIO ON SOURCE CHANNEL DURING HO (incremented only in phases 9–11) DN9814277 001004 Id:0900d805807f93e0 Confidential DEC 69 . 001035.Call Related DX Causes in BSC DX causes in BSC statistics Counter name Counter number DX cause TRANSACTIONS FAIL DUE TO BSS FAIL 001002 This is a sum of the counters 001033. 001051 TRANSACTIONS ENDED DUE RADIO FAIL (incremented only in phases 1-8. 001047. 001046.DX causes in BSC statistics Call Related DX Causes in BSC Counter name Counter number DX cause DEC TRANSACTIONS FAIL DUE RADIO ON TARGET CHANNEL DURING HO (incremented only in phases 12-14) 001005 ass_fail_msg_c 306 conn_fail_c 315 conn_fail_rad_inf_fail_c 316 conn_fail_rad_link_fail_c 317 err_ind_c 320 ho_fail_c 323 ho_detect_fail_c 324 ch_mode_mod_fail_c 349 ass_fail_c 350 error_report_c 354 conf_change_ms_fail_c 365 timing_advance_c 400 no_resp_from_coprocess_c 503 ms_is_lost_c 507 source_fail_c 511 TRANSACTIONS ENDED DUE TO BSS PROBLEM 001012 This is a sum of the counters 001045. 15) 001013 ass_fail_msg_c 306 conn_fail_c 315 conn_fail_rad_inf_fail_c 316 conn_fail_rad_link_fail_c 317 err_ind_c 320 ho_fail_c 323 ho_detect_fail_c 324 ch_mode_mod_fail_c 349 ass_fail_c 350 error_report_c 354 conf_change_ms_fail_c 365 timing_advance_c 400 no_resp_from_coprocess_c 503 ms_is_lost_c 507 target_fail_c 510 source_fail_c 511 70 Id:0900d805807f93e0 Confidential DN9814277 . 001083 TCH TR FAIL (incremented only in phases 1.001029 8. 001074 TCH ACT FAIL 001028 This is a sum of the counters 001081. 15) conn_fail_rem_trans_fail_c 318 TCH TR FAIL SOURCE (incremented only in phases 9-11) 001030 conn_fail_rem_trans_fail_c 318 TCH TR FAIL TARGET (incremented only in phases 12-14) 001031 conn_fail_rem_trans_fail_c 318 DN9814277 Id:0900d805807f93e0 Confidential 71 .Call Related DX Causes in BSC DX causes in BSC statistics Counter name Counter number DX cause DEC TRANSACTIONS ENDED DUE SOURCE CHANNEL FAIL DURING HO (incremented only in phases 9-11) 001014 ass_fail_msg_c 306 conn_fail_c 315 conn_fail_rad_inf_fail_c 316 conn_fail_rad_link_fail_c 317 err_ind_c 320 ho_fail_c 323 ch_mode_mod_fail_c 349 ass_fail_c 350 error_report_c 354 timing_advance_c 400 no_resp_from_coprocess_c 503 ms_is_lost_c 507 target_fail_c 510 ass_fail_msg_c 306 conn_fail_c 315 conn_fail_rad_inf_fail_c 316 conn_fail_rad_link_fail_c 317 err_ind_c 320 ho_fail_c 323 ho_detect_fail_c 324 ch_mode_mod_fail_c 349 ass_fail_c 350 error_report_c 354 conf_change_ms_fail_c 365 timing_advance_c 400 no_resp_from_coprocess_c 503 ms_is_lost_c 507 source_fail_c 511 TRANSACTIONS ENDED DUE TARGET CHANNEL FAIL DURING HO (incremented only in phases 12-14) 001015 SDCCH ACT FAIL 001027 This is a sum of the counters 001072. 001079. 001085. 001080 SDCCH LAPD FAIL 001035 lapd_fail_block_c 303 SDCCH BTS FAIL 001036 bts_fail_block_c 302 SDCCH USER ACT 001037 user_act_block_c 300 SDCCH NETW ACT 001039 netw_act_block_c 301 TCH ABIS PROBL 001045 This is a sum of the counters 001084.DX causes in BSC statistics Call Related DX Causes in BSC Counter name Counter number DX cause SDCCH ABIS PROBL 001033 This is a sum of the counters 001075. 001076. 001089 SDCCH ACT FAIL CALL (incremented only in phases 1-8) 001072 ch_act_nack_c 308 ch_act_nack_om_inter_c 309 ch_act_nack_equip_fail_c 310 ch_act_nack_encryp_alg_c 311 ch_act_nack_rad_ch_alr_a_c 312 ch_act_nack_serv_not_ava_c 313 mode_mod_nack_c 325 mode_mod_nack_equip_fail_c 346 mode_mod_nack_trc_rat_un_c 347 err_rep_enc_alg_not_imp_c 353 ch_act_nack_ch_mode_err_c 355 ch_act_nack_gen_ie_err_c 356 speech_version_unavail_c 357 conf_change_bts_fail_c 364 ciph_not_support_trx_c 375 dfca_hop_prm_not_valid_c 376 rrm_speech_ver_unavail_c 402 72 Id:0900d805807f93e0 Confidential DEC DN9814277 . 001086 TCH LAPD FAIL 001046 lapd_fail_block_c 303 TCH BTS FAIL 001047 bts_fail_block_c 302 TCH USER ACT 001048 user_act_block_c 300 TCH NETW ACT 001050 netw_act_block_c 301 TCH A IF PROBL 001051 This is a sum of the counters 001087. 001088. 001077 SDCCH A IF PROBL 001034 This is a sum of the counters 001078. Call Related DX Causes in BSC DX causes in BSC statistics Counter name Counter number DX cause DEC SDCCH ACT FAIL TARGET (incremented only in phases 12-14) 001074 ch_act_nack_c 308 ch_act_nack_om_inter_c 309 ch_act_nack_equip_fail_c 310 ch_act_nack_encryp_alg_c 311 ch_act_nack_rad_ch_alr_a_c 312 ch_act_nack_serv_not_ava_c 313 mode_mod_nack_c 325 mode_mod_nack_equip_fail_c 346 mode_mod_nack_trc_rat_un_c 347 err_rep_enc_alg_not_imp_c 353 ch_act_nack_ch_mode_err_c 355 ch_act_nack_gen_ie_err_c 356 speech_version_unavail_c 357 conf_change_bts_fail_c 364 ciph_not_support_trx_c 375 dfca_hop_prm_not_valid_c 376 rrm_speech_ver_unavail_c 402 DN9814277 Id:0900d805807f93e0 Confidential 73 . DX causes in BSC statistics Call Related DX Causes in BSC Counter name Counter number DX cause DEC SDCCH ABIS FAIL CALL (incremented only in phases 1-8) 001075 abis_fail_block_c 304 abis_msg_corrup_to_bts_c 305 block_slave_c 307 ch_act_fail_c 314 data_ind_corrup_c 319 estab_ind_fail_c 321 estab_conf_fail_c 322 mode_mod_ack_fail_c 326 no_meas_result_c 327 no_resp_from_copro_c 328 phy_cont_conf_fail_c 329 rcs_alg_start_ack_fail_c 330 rcs_alg_cl_ack_fail_c 331 rf_ch_rel_ack_fail_c 333 rel_ind_fail_c 335 signalling_error_c 336 sapi_3_fail_c 343 sub_timer_c 367 estab_ind_corrupted_c 370 cn_id_not_found_c 374 etp_failure_c 377 has_state_conflict_c 505 74 Id:0900d805807f93e0 Confidential DN9814277 . Call Related DX Causes in BSC DX causes in BSC statistics Counter name Counter number DX cause DEC SDCCH ABIS FAIL SOURCE (incremented only in phases 9-11) 001076 abis_fail_block_c 304 abis_msg_corrup_to_bts_c 305 block_slave_c 307 ch_act_fail_c 314 data_ind_corrup_c 319 estab_ind_fail_c 321 estab_conf_fail_c 322 mode_mod_ack_fail_c 326 no_meas_result_c 327 no_resp_from_copro_c 328 phy_cont_conf_fail_c 329 rcs_alg_start_ack_fail_c 330 rcs_alg_cl_ack_fail_c 331 rf_ch_rel_ack_fail_c 333 rel_ind_fail_c 335 signalling_error_c 336 sapi_3_fail_c 343 estab_ind_corrupted_c 370 has_state_conflict_c 505 DN9814277 Id:0900d805807f93e0 Confidential 75 . DX causes in BSC statistics Call Related DX Causes in BSC Counter name Counter number DX cause DEC SDCCH ABIS FAIL TARGET (incremented only in phases 12-14) 001077 abis_fail_block_c 304 abis_msg_corrup_to_bts_c 305 block_slave_c 307 ch_act_fail_c 314 data_ind_corrup_c 319 estab_ind_fail_c 321 estab_conf_fail_c 322 mode_mod_ack_fail_c 326 no_meas_result_c 327 no_resp_from_copro_c 328 phy_cont_conf_fail_c 329 rcs_alg_start_ack_fail_c 330 rcs_alg_cl_ack_fail_c 331 rf_ch_rel_ack_fail_c 333 rel_ind_fail_c 335 signalling_error_c 336 sapi_3_fail_c 343 sub_timer_c 367 estab_ind_corrupted_c 370 etp_failure_c 377 has_state_conflict_c 505 76 Id:0900d805807f93e0 Confidential DN9814277 . Call Related DX Causes in BSC DX causes in BSC statistics Counter name Counter number DX cause DEC SDCCH A IF FAIL CALL (incremented only in phases 1-8) 001078 rc0_disco_ind_c 332 rrm_switch_crc_pool_c 401 unavail_codec_type_conf_c 409 clear_cmd_not_received_c 506 no_resp_to_ho_cpl_msg_c 508 aiv_hand_act_fail_c 600 aiv_ssp_c 601 sccp_conn_fail_c 602 sccp_conn_timeout_c 603 sccp_release_c 604 global_reset_c 606 no_dtap_from_msc_c 608 ho_denied_assign_c 609 ho_denied_ciphering_c 610 ho_denied_clear_c 611 ho_denied_no_sccp_conn_c 612 T7_expiry_c 613 T10_expiry_c 614 aiv_crct_res_timeout_c 615 aiv_crct_conn_timeout_c 616 aiv_crct_disconn_timeout_c 617 aiv_crct_rel_timeout_c 618 aiv_timeout_c 619 act_ctrl_timeout_c 620 invalid_bssmap_msg_c 621 unknown_a_pcm_c 622 ho_denied_no_proper_crc_c 623 ch_type_mismatch_c 624 aiv_transc_or_rate_unava_c 625 aiv_speech_version_unava_c 626 aiv_conn_refresh_timeout_c 628 aiv_conn_refresh_failed_c 629 no_support_a_if_type_c 630 no_supp_redundancy_level_c 631 no_supp_codec_type_conf_c 632 unavail_a_if_type_c 633 t25_timer_expiry_c 634 rc0_hand_act_fail_c 700 DN9814277 Id:0900d805807f93e0 Confidential 77 . DX causes in BSC statistics Counter name 78 Call Related DX Causes in BSC Counter number DX cause DEC a_crct_conn_err_c 702 rc0_crct_conn_timeout_c 703 access_out_of_crct_tbl_c 704 a_crct_rel_err_c 705 rc0_transc_or_rate_unava_c 706 rc0_cip_type_mismatch_c 707 rc0_inv_msg_contents_c 708 rc0_req_speech_ver_unava_c 709 rc0_hunting_queue_full_c 710 rc0_a_crct_congestion_c 711 rc0_a_search_error_c 712 rc0_crct_pool_mismatch_c 713 rc0_rej_due_eme_call_c 714 rc0_ilc_file_error_c 715 a_crct_conn_err_consec_c 716 call_id_alr_allocated_c 717 a_tsl_user_mismatch_c 800 sc7_crct_res_timeout_c 801 sc7_crct_conn_timeout_c 802 sc7_crct_disconn_timeout_c 803 sc7_crct_rel_timeout_c 804 a_tsl_blocked_c 805 a_tsl_status_unknown_c 806 lsi_access_fail_c 807 scc_access_fail_c 808 undef_tsl_in_lsi_c 809 crct_equipment_fail_c 810 reset_crct_c 811 sc7_ssp_c 813 a_pcm_fault_c 815 a_crct_removed_c 817 a_et_state_change_c 819 m_radio_if_mess_fail_c 900 m_radio_if_fail_c 901 m_r_if_f_rev_to_old_c 910 m_equipment_fail_c 914 m_no_radio_res_avail_c 915 m_req_terr_res_unava_c 916 Id:0900d805807f93e0 Confidential DN9814277 . Call Related DX Causes in BSC Counter name DN9814277 DX causes in BSC statistics Counter number DX cause DEC m_ciph_alg_not_supp_c 922 m_terr_chan_alr_allc_c 923 m_prot_err_b_bsc_msc_c 924 m_unexpected_c 925 m_invalid_cell_c 926 m_invalid_msg_cont_c 927 m_ie_or_field_missing_c 928 m_incorrect_value_c 929 m_unknown_msg_type_c 930 m_unknown_ie 931 m_transc_or_rate_unavail_c 932 m_cip_type_mismatch_c 933 m_speech_version_unavail_c 935 Id:0900d805807f93e0 Confidential 79 . DX causes in BSC statistics Call Related DX Causes in BSC Counter name Counter number DX cause DEC SDCCH A IF FAIL SOURCE (incremented only in phases 9-11) 001079 rc0_disco_ind_c 332 rrm_switch_crc_pool_c 401 unavail_codec_type_conf_c 409 clear_cmd_not_received_c 506 no_resp_to_ho_cpl_msg_c 508 aiv_hand_act_fail_c 600 aiv_ssp_c 601 sccp_conn_fail_c 602 sccp_conn_timeout_c 603 sccp_release_c 604 global_reset_c 606 no_dtap_from_msc_c 608 ho_denied_assign_c 609 ho_denied_ciphering_c 610 ho_denied_clear_c 611 ho_denied_no_sccp_conn_c 612 T7_expiry_c 613 T10_expiry_c 614 aiv_crct_res_timeout_c 615 aiv_crct_conn_timeout_c 616 aiv_crct_disconn_timeout_c 617 aiv_crct_rel_timeout_c 618 aiv_timeout_c 619 act_ctrl_timeout_c 620 invalid_bssmap_msg_c 621 unknown_a_pcm_c 622 ho_denied_no_proper_crc_c 623 ch_type_mismatch_c 624 aiv_transc_or_rate_unava_c 625 aiv_speech_version_unava_c 626 aiv_conn_refresh_timeout_c 628 aiv_conn_refresh_failed_c 629 rc0_hand_act_fail_c 700 a_crct_alr_res_c 701 a_crct_conn_err_c 702 rc0_crct_conn_timeout_c 703 access_out_of_crct_tbl_c 704 a_crct_rel_err_c 705 80 Id:0900d805807f93e0 Confidential DN9814277 . Call Related DX Causes in BSC Counter name DN9814277 DX causes in BSC statistics Counter number DX cause DEC rc0_transc_or_rate_unava_c 706 rc0_cip_type_mismatch_c 707 rc0_inv_msg_contents_c 708 rc0_req_speech_ver_unava_c 709 rc0_hunting_queue_full_c 710 rc0_a_crct_congestion_c 711 rc0_a_search_error_c 712 rc0_crct_pool_mismatch_c 713 rc0_rej_due_eme_call_c 714 rc0_ilc_file_error_c 715 a_crct_conn_err_consec_c 716 a_tsl_user_mismatch_c 800 sc7_crct_res_timeout_c 801 sc7_crct_conn_timeout_c 802 sc7_crct_disconn_timeout_c 803 sc7_crct_rel_timeout_c 804 a_tsl_blocked_c 805 a_tsl_status_unknown_c 806 lsi_access_fail_c 807 scc_access_fail_c 808 undef_tsl_in_lsi_c 809 crct_equipment_fail_c 810 reset_crct_c 811 sc7_ssp_c 813 a_pcm_fault_c 815 a_crct_removed_c 817 a_et_state_change_c 819 m_radio_if_mess_fail_c 900 m_radio_if_fail_c 901 m_call_control_c 909 m_r_if_f_rev_to_old_c 910 m_equipment_fail_c 914 m_no_radio_res_avail_c 915 m_req_terr_res_unava_c 916 m_cch_overload_c 917 m_processor_overload_c 918 m_bss_not_equipped_c 919 m_ms_not_equipped_c 920 Id:0900d805807f93e0 Confidential 81 . DX causes in BSC statistics Counter name 82 Call Related DX Causes in BSC Counter number DX cause DEC m_tr_cod_rat_ad_unav_c 921 m_ciph_alg_not_supp_c 922 m_terr_chan_alr_allc_c 923 m_prot_err_b_bsc_msc_c 924 m_unexpected_c 925 m_invalid_cell_c 926 m_invalid_msg_cont_c 927 m_ie_or_field_missing 928 m_incorrect_value 929 m_unknown_msg_type 930 m_unknown_ie 931 m_transc_or_rate_unavail_c 932 m_cip_type_mismatch_c 933 m_speech_version_unavail_c 935 Id:0900d805807f93e0 Confidential DN9814277 . Call Related DX Causes in BSC DX causes in BSC statistics Counter name Counter number DX cause DEC SDCCH A IF FAIL TARGET (incremented only in phases 12-14) 001080 rc0_disco_ind_c 332 rrm_switch_crc_pool_c 401 clear_cmd_not_received_c 506 no_resp_to_ho_cpl_msg_c 508 aiv_hand_act_fail_c 600 aiv_ssp_c 601 sccp_conn_fail_c 602 sccp_conn_timeout_c 603 sccp_release_c 604 global_reset_c 606 no_dtap_from_msc_c 608 ho_denied_assign_c 609 ho_denied_ciphering_c 610 ho_denied_clear_c 611 ho_denied_no_sccp_conn_c 612 T7_expiry_c 613 T10_expiry_c 614 aiv_crct_res_timeout_c 615 aiv_crct_conn_timeout_c 616 aiv_crct_disconn_timeout_c 617 aiv_crct_rel_timeout_c 618 aiv_timeout_c 619 act_ctrl_timeout_c 620 invalid_bssmap_msg_c 621 unknown_a_pcm_c 622 ho_denied_no_proper_crc_c 623 ch_type_mismatch_c 624 aiv_transc_or_rate_unava_c 625 aiv_speech_version_unava_c 626 aiv_conn_refresh_timeout_c 628 aiv_conn_refresh_failed_c 629 no_support_a_if_type_c 630 no_supp_redundancy_level_c 631 no_supp_codec_type_conf_c 632 unavail_a_if_type_c 633 t25_timer_expiry_c 634 rc0_hand_act_fail_c 700 a_crct_alr_res_c 701 DN9814277 Id:0900d805807f93e0 Confidential 83 . DX causes in BSC statistics Counter name 84 Call Related DX Causes in BSC Counter number DX cause DEC rc0_transc_or_rate_unava_c 706 rc0_cip_type_mismatch_c 707 rc0_inv_msg_contents_c 708 rc0_req_speech_ver_unava_c 709 rc0_hunting_queue_full_c 710 rc0_a_crct_congestion_c 711 rc0_a_search_error_c 712 rc0_crct_pool_mismatch_c 713 rc0_rej_due_eme_call_c 714 rc0_ilc_file_error_c 715 a_crct_conn_err_consec_c 716 call_id_alr_allocated_c 717 unavail_terr_resource_c 718 a_tsl_user_mismatch_c 800 sc7_crct_res_timeout_c 801 sc7_crct_conn_timeout_c 802 sc7_crct_disconn_timeout_c 803 sc7_crct_rel_timeout_c 804 a_tsl_blocked_c 805 a_tsl_status_unknown_c 806 lsi_access_fail_c 807 scc_access_fail_c 808 undef_tsl_in_lsi_c 809 crct_equipment_fail_c 810 reset_crct_c 811 sc7_ssp_c 813 a_pcm_fault_c 815 a_crct_removed_c 817 a_et_state_change_c 819 m_radio_if_mess_fail_c 900 m_radio_if_fail_c 901 m_call_control_c 909 m_r_if_f_rev_to_old_c 910 m_equipment_fail_c 914 m_no_radio_res_avail_c 915 m_req_terr_res_unava_c 916 m_cch_overload_c 917 m_processor_overload_c 918 Id:0900d805807f93e0 Confidential DN9814277 . Call Related DX Causes in BSC Counter name TCH ACT FAIL CALL (incremented only in phases 1-8) DN9814277 DX causes in BSC statistics Counter number 001081 DX cause DEC m_tr_cod_rat_ad_unav_c 921 m_ciph_alg_not_supp_c 922 m_terr_chan_alr_allc_c 923 m_prot_err_b_bsc_msc_c 924 m_unexpected_c 925 m_invalid_cell_c 926 m_invalid_msg_cont_c 927 m_ie_or_field_missing_c 928 m_incorrect_value_c 929 m_unknown_msg_type_c 930 m_unknown_ie_c 931 m_transc_or_rate_unavail_c 932 m_cip_type_mismatch_c 933 m_speech_version_unavail_c 935 m_no_supp_codec_typ_conf_c 941 m_no_support_a_if_type_c 942 m_unavail_a_if_type_c 943 m_unavail_codec_typ_conf_c 944 m_no_supp_redundancy_lvl_c 945 ch_act_nack_c 308 ch_act_nack_om_inter_c 309 ch_act_nack_equip_fail_c 310 ch_act_nack_encryp_alg_c 311 ch_act_nack_rad_ch_alr_a_c 312 ch_act_nack_serv_not_ava_c 313 mode_mod_nack_c 325 mode_mod_nack_equip_fail_c 346 mode_mod_nack_trc_rat_un_c 347 err_rep_enc_alg_not_imp_c 353 ch_act_nack_ch_mode_err_c 355 ch_act_nack_gen_ie_err_c 356 speech_version_unavail_c 357 conf_change_bts_fail_c 364 ciph_not_support_trx_c 375 rrm_speech_ver_unavail_c 402 Id:0900d805807f93e0 Confidential 85 . DX causes in BSC statistics Call Related DX Causes in BSC Counter name Counter number DX cause DEC TCH ACT FAIL TARGET (incremented only in phases 12-14) 001083 ch_act_nack_c 308 ch_act_nack_om_inter_c 309 ch_act_nack_equip_fail_c 310 ch_act_nack_encryp_alg_c 311 ch_act_nack_rad_ch_alr_a_c 312 ch_act_nack_serv_not_ava_c 313 mode_mod_nack_c 325 mode_mod_nack_equip_fail_c 346 mode_mod_nack_trc_rat_un_c 347 err_rep_enc_alg_not_imp_c 353 ch_act_nack_ch_mode_err_c 355 ch_act_nack_gen_ie_err_c 356 speech_version_unavail_c 357 conf_change_bts_fail_c 364 ciph_not_support_trx_c 375 rrm_speech_ver_unavail_c 402 86 Id:0900d805807f93e0 Confidential DN9814277 . 15) 001084 abis_fail_block_c 304 abis_msg_corrup_to_bts_c 305 block_slave_c 307 ch_act_fail_c 314 data_ind_corrup_c 319 estab_ind_fail_c 321 estab_conf_fail_c 322 mode_mod_ack_fail_c 326 no_meas_result_c 327 no_resp_from_copro_c 328 phy_cont_conf_fail_c 329 rcs_alg_start_ack_fail_c 330 rcs_alg_cl_ack_fail_c 331 rf_ch_rel_ack_fail_c 333 rel_ind_fail_c 335 signalling_error_c 336 sapi_3_fail_c 343 sub_timer_c 367 estab_ind_corrupted_c 370 cn_id_not_found_c 374 etp_failure_c 377 has_state_conflict_c 505 DN9814277 Id:0900d805807f93e0 Confidential 87 .Call Related DX Causes in BSC DX causes in BSC statistics Counter name Counter number DX cause DEC TCH ABIS FAIL CALL (incremented only in phases 1-8. DX causes in BSC statistics Call Related DX Causes in BSC Counter name Counter number DX cause DEC TCH ABIS FAIL SOURCE (incremented only in phases 9-11) 001085 abis_fail_block_c 304 abis_msg_corrup_to_bts_c 305 block_slave_c 307 ch_act_fail_c 314 data_ind_corrup_c 319 estab_ind_fail_c 321 estab_conf_fail_c 322 mode_mod_ack_fail_c 326 no_meas_result_c 327 no_resp_from_copro_c 328 phy_cont_conf_fail_c 329 rcs_alg_start_ack_fail_c 330 rcs_alg_cl_ack_fail_c 331 rf_ch_rel_ack_fail_c 333 rel_ind_fail_c 335 signalling_error_c 336 sapi_3_fail_c 343 estab_ind_corrupted_c 370 has_state_conflict_c 505 88 Id:0900d805807f93e0 Confidential DN9814277 . Call Related DX Causes in BSC DX causes in BSC statistics Counter name Counter number DX cause DEC TCH ABIS FAIL NEW (incremented only in phases 12-14) 001086 abis_fail_block_c 304 abis_msg_corrup_to_bts_c 305 block_slave_c 307 ch_act_fail_c 314 data_ind_corrup_c 319 estab_ind_fail_c 321 estab_conf_fail_c 322 mode_mod_ack_fail_c 326 no_meas_result_c 327 no_resp_from_copro_c 328 phy_cont_conf_fail_c 329 rcs_alg_start_ack_fail_c 330 rcs_alg_cl_ack_fail_c 331 rf_ch_rel_ack_fail_c 333 rel_ind_fail_c 335 signalling_error_c 336 sapi_3_fail_c 343 sub_timer_c 367 estab_ind_corrupted_c 370 etp_failure_c 377 has_state_conflict_c 505 DN9814277 Id:0900d805807f93e0 Confidential 89 . 15) 001087 rc0_disco_ind_c 332 rrm_switch_crc_pool_c 401 unavail_codec_type_conf_c 409 clear_cmd_not_received_c 506 no_resp_to_ho_cpl_msg_c 508 aiv_hand_act_fail_c 600 aiv_ssp_c 601 sccp_conn_fail_c 602 sccp_conn_timeout_c 603 sccp_release_c 604 global_reset_c 606 no_dtap_from_msc_c 608 ho_denied_assign_c 609 ho_denied_ciphering_c 610 ho_denied_clear_c 611 ho_denied_no_sccp_conn_c 612 T7_expiry_c 613 T10_expiry_c 614 aiv_crct_res_timeout_c 615 aiv_crct_conn_timeout_c 616 aiv_crct_disconn_timeout_c 617 aiv_crct_rel_timeout_c 618 aiv_timeout_c 619 act_ctrl_timeout_c 620 invalid_bssmap_msg_c 621 unknown_a_pcm_c 622 ho_denied_no_proper_crc_c 623 ch_type_mismatch_c 624 aiv_transc_or_rate_unava_c 625 aiv_speech_version_unava_c 626 aiv_conn_refresh_timeout_c 628 aiv_conn_refresh_failed_c 629 no_support_a_if_type_c 630 no_supp_redundancy_level_c 631 no_supp_codec_type_conf_c 632 unavail_a_if_type_c 633 t25_timer_expiry_c 634 rc0_hand_act_fail_c 700 90 Id:0900d805807f93e0 Confidential DN9814277 .DX causes in BSC statistics Call Related DX Causes in BSC Counter name Counter number DX cause DEC TCH A IF FAIL CALL (incremented only in phases 1-8. Call Related DX Causes in BSC Counter name DN9814277 DX causes in BSC statistics Counter number DX cause DEC access_out_of_crct_tbl_c 704 a_crct_rel_err_c 705 rc0_transc_or_rate_unava_c 706 rc0_cip_type_mismatch_c 707 rc0_inv_msg_contents_c 708 rc0_req_speech_ver_unava_c 709 rc0_hunting_queue_full_c 710 rc0_a_crct_congestion_c 711 rc0_a_search_error_c 712 rc0_crct_pool_mismatch_c 713 rc0_rej_due_eme_call_c 714 rc0_ilc_file_error_c 715 a_crct_conn_err_consec_c 716 call_id_alr_allocated_c 717 a_tsl_user_mismatch_c 800 sc7_crct_res_timeout_c 801 sc7_crct_conn_timeout_c 802 sc7_crct_disconn_timeout_c 803 sc7_crct_rel_timeout_c 804 a_tsl_blocked_c 805 a_tsl_status_unknown_c 806 lsi_access_fail_c 807 scc_access_fail_c 808 undef_tsl_in_lsi_c 809 crct_equipment_fail_c 810 reset_crct_c 811 sc7_ssp_c 813 a_pcm_fault_c 815 a_crct_removed_c 817 a_et_state_change_c 819 m_radio_if_mess_fail_c 900 m_radio_if_fail_c 901 m_r_if_f_rev_to_old_c 910 m_equipment_fail_c 914 m_no_radio_res_avail_c 915 m_req_terr_res_unava_c 916 m_cch_overload_c 917 Id:0900d805807f93e0 Confidential 91 . DX causes in BSC statistics Counter name 92 Call Related DX Causes in BSC Counter number DX cause DEC m_processor_overload_c 918 m_bss_not_equipped_c 919 m_ms_not_equipped_c 920 m_tr_cod_rat_ad_unav_c 921 m_ciph_alg_not_supp_c 922 m_terr_chan_alr_allc_c 923 m_prot_err_b_bsc_msc_c 924 m_unexpected_c 925 m_invalid_cell_c 926 m_invalid_msg_cont_c 927 m_ie_or_field_missing_c 928 m_incorrect_value_c 929 m_unknown_msg_type_c 930 m_unknown_ie_c 931 m_transc_or_rate_unavail_c 932 m_cip_type_mismatch_c 933 m_speech_version_unavail_c 935 Id:0900d805807f93e0 Confidential DN9814277 . Call Related DX Causes in BSC DX causes in BSC statistics Counter name Counter number DX cause DEC TCH A IF FAIL SOURCE (incremented only in phases 9-11) 001088 rc0_disco_ind_c 332 rrm_switch_crc_pool_c 401 unavail_codec_type_conf_c 409 clear_cmd_not_received_c 506 no_resp_to_ho_cpl_msg_c 508 aiv_hand_act_fail_c 600 aiv_ssp_c 601 sccp_conn_fail_c 602 sccp_conn_timeout_c 603 sccp_release_c 604 global_reset_c 606 no_dtap_from_msc_c 608 ho_denied_assign_c 609 ho_denied_ciphering_c 610 ho_denied_clear_c 611 ho_denied_no_sccp_conn_c 612 T7_expiry_c 613 T10_expiry_c 614 aiv_crct_res_timeout_c 615 aiv_crct_conn_timeout_c 616 aiv_crct_disconn_timeout_c 617 aiv_crct_rel_timeout_c 618 aiv_timeout_c 619 act_ctrl_timeout_c 620 invalid_bssmap_msg_c 621 unknown_a_pcm_c 622 ho_denied_no_proper_crc_c 623 ch_type_mismatch_c 624 aiv_transc_or_rate_unava_c 625 aiv_speech_version_unava_c 626 aiv_conn_refresh_timeout_c 628 aiv_conn_refresh_failed_c 629 rc0_hand_act_fail_c 700 a_crct_alr_res_c 701 a_crct_conn_err_c 702 rc0_crct_conn_timeout_c 703 DN9814277 Id:0900d805807f93e0 Confidential 93 . DX causes in BSC statistics Counter name 94 Call Related DX Causes in BSC Counter number DX cause DEC access_out_of_crct_tbl_c 704 a_crct_rel_err_c 705 rc0_transc_or_rate_unava_c 706 rc0_cip_type_mismatch_c 707 rc0_inv_msg_contents_c 708 rc0_req_speech_ver_unava_c 709 rc0_hunting_queue_full_c 710 rc0_a_crct_congestion_c 711 rc0_a_search_error_c 712 rc0_crct_pool_mismatch_c 713 rc0_rej_due_eme_call_c 714 rc0_ilc_file_error_c 715 a_crct_conn_err_consec_c 716 a_tsl_user_mismatch_c 800 sc7_crct_res_timeout_c 801 sc7_crct_conn_timeout_c 802 sc7_crct_disconn_timeout_c 803 sc7_crct_rel_timeout_c 804 a_tsl_blocked_c 805 a_tsl_status_unknown_c 806 lsi_access_fail_c 807 scc_access_fail_c 808 undef_tsl_in_lsi_c 809 crct_equipment_fail_c 810 reset_crct_c 811 sc7_ssp_c 813 a_pcm_fault_c 815 a_crct_removed_c 817 a_et_state_change_c 819 m_radio_if_mess_fail_c 900 m_radio_if_fail_c 901 m_call_control_c 909 m_r_if_f_rev_to_old_c 910 m_equipment_fail_c 914 m_no_radio_res_avail_c 915 m_req_terr_res_unava_c 916 Id:0900d805807f93e0 Confidential DN9814277 . Call Related DX Causes in BSC Counter name DN9814277 DX causes in BSC statistics Counter number DX cause DEC m_cch_overload_c 917 m_processor_overload_c 918 m_bss_not_equipped_c 919 m_ms_not_equipped_c 920 m_tr_cod_rat_ad_unav_c 921 m_ciph_alg_not_supp_c 922 m_terr_chan_alr_allc_c 923 m_prot_err_b_bsc_msc_c 924 m_unexpected_c 925 m_invalid_cell_c 926 m_invalid_msg_cont_c 927 m_ie_or_field_missing_c 928 m_incorrect_value_c 929 m_unknown_msg_type_c 930 m_unknown_ie_c 931 m_transc_or_rate_unavail_c 932 m_cip_type_mismatch_c 933 m_speech_version_unavail_c 935 Id:0900d805807f93e0 Confidential 95 . DX causes in BSC statistics Call Related DX Causes in BSC Counter name Counter number DX cause DEC TCH A IF FAIL NEW (incremented only in phases 12-14) 001089 rc0_disco_ind_c 332 rrm_switch_crc_pool_c 401 clear_cmd_not_received_c 506 no_resp_to_ho_cpl_msg_c 508 aiv_hand_act_fail_c 600 aiv_ssp_c 601 sccp_conn_fail_c 602 sccp_conn_timeout_c 603 sccp_release_c 604 global_reset_c 606 no_dtap_from_msc_c 608 ho_denied_assign_c 609 ho_denied_ciphering_c 610 ho_denied_clear_c 611 ho_denied_no_sccp_conn_c 612 T7_expiry_c 613 T10_expiry_c 614 aiv_crct_res_timeout_c 615 aiv_crct_conn_timeout_c 616 aiv_crct_disconn_timeout_c 617 aiv_crct_rel_timeout_c 618 aiv_timeout_c 619 act_ctrl_timeout_c 620 invalid_bssmap_msg_c 621 unknown_a_pcm_c 622 ho_denied_no_proper_crc_c 623 ch_type_mismatch_c 624 aiv_transc_or_rate_unava_c 625 aiv_speech_version_unava_c 626 aiv_conn_refresh_timeout_c 628 aiv_conn_refresh_failed_c 629 no_support_a_if_type_c 630 no_supp_redundancy_level_c 631 no_supp_codec_type_conf_c 632 unavail_a_if_type_c 633 t25_timer_expiry_c 634 rc0_hand_act_fail_c 700 a_crct_alr_res_c 701 96 Id:0900d805807f93e0 Confidential DN9814277 . Call Related DX Causes in BSC Counter name DN9814277 DX causes in BSC statistics Counter number DX cause DEC a_crct_conn_err_c 702 rc0_crct_conn_timeout_c 703 access_out_of_crct_tbl_c 704 a_crct_rel_err_c 705 rc0_transc_or_rate_unava_c 706 rc0_cip_type_mismatch_c 707 rc0_inv_msg_contents_c 708 rc0_req_speech_ver_unava_c 709 rc0_hunting_queue_full_c 710 rc0_a_crct_congestion_c 711 rc0_a_search_error_c 712 rc0_crct_pool_mismatch_c 713 rc0_rej_due_eme_call_c 714 rc0_ilc_file_error_c 715 a_crct_conn_err_consec_c 716 call_id_alr_allocated_c 717 unavail_terr_resource_c 718 a_tsl_user_mismatch_c 800 sc7_crct_res_timeout_c 801 sc7_crct_conn_timeout_c 802 sc7_crct_disconn_timeout_c 803 sc7_crct_rel_timeout_c 804 a_tsl_blocked_c 805 a_tsl_status_unknown_c 806 lsi_access_fail_c 807 scc_access_fail_c 808 undef_tsl_in_lsi_c 809 crct_equipment_fail_c 810 reset_crct_c 811 sc7_ssp_c 813 a_pcm_fault_c 815 a_crct_removed_c 817 a_et_state_change_c 819 m_radio_if_mess_fail_c 900 m_radio_if_fail_c 901 m_call_control_c 909 m_r_if_f_rev_to_old_c 910 m_equipment_fail_c 914 Id:0900d805807f93e0 Confidential 97 . DX causes in BSC statistics Counter name 98 Call Related DX Causes in BSC Counter number DX cause DEC m_req_terr_res_unava_c 916 m_cch_overload_c 917 m_processor_overload_c 918 m_bss_not_equipped_c 919 m_ms_not_equipped_c 920 m_tr_cod_rat_ad_unav_c 921 m_ciph_alg_not_supp_c 922 m_terr_chan_alr_allc_c 923 m_prot_err_b_bsc_msc_c 924 m_unexpected_c 925 m_invalid_cell_c 926 m_invalid_msg_cont_c 927 m_ie_or_field_missing_c 928 m_incorrect_value_c 929 m_unknown_msg_type_c 930 m_unknown_ie_c 931 m_transc_or_rate_unavail_c 932 m_cip_type_mismatch_c 933 m_speech_version_unavail_c 935 m_no_supp_codec_typ_conf_c 941 m_no_support_a_if_type_c 942 m_unavail_a_if_type_c 943 m_unavail_codec_typ_conf_c 944 m_no_supp_redundancy_lvl_c 945 Id:0900d805807f93e0 Confidential DN9814277 . 3. 8–14) 001139 ass_fail_msg_c 306 conn_fail_c 315 conn_fail_rad_inf_fail_c 316 conn_fail_rad_link_fail_c 317 err_ind_c 320 ho_fail_c 323 ho_detect_fail_c 324 ch_mode_mod_fail_c 349 ass_fail_c 350 error_report_c 354 conf_change_ms_fail_c 365 timing_advance_c 400 no_resp_from_coprocess_c 503 ms_is_lost_c 507 target_fail_c 510 source_fail_c 511 DN9814277 Id:0900d805807f93e0 Confidential 99 . 5.Call Related DX Causes in BSC DX causes in BSC statistics Counter name Counter number DX cause DEC TCH REL DUE TO RADIO FAIL (incremented only in phases 2. DX causes in BSC statistics Call Related DX Causes in BSC Counter name Counter number DX cause DEC TCH REL DUE TO BSS FAIL (incremented only in phases 2. 8–14) 001140 bts_fail_block_c 302 lapd_fail_block_c 303 abis_fail_block_c 304 abis_msg_corrup_to_bts_c 305 block_slave_c 307 ch_act_fail_c 314 data_ind_corrup_c 319 estab_ind_fail_c 321 estab_conf_fail_c 322 mode_mod_ack_fail_c 326 no_meas_result_c 327 no_resp_from_copro_c 328 phy_cont_conf_fail_c 329 rcs_alg_start_ack_fail_c 330 rcs_alg_cl_ack_fail_c 331 rc0_disco_ind_c 332 rf_ch_rel_ack_fail_c 333 rel_ind_fail_c 335 signalling_error_c 336 sapi_3_fail_c 343 sub_timer_c 367 estab_ind_corrupted_c 370 rrm_switch_crc_pool_c 401 has_state_conflict_c 505 clear_cmd_not_received_c 506 no_resp_to_ho_cpl_msg_c 508 aiv_hand_act_fail_c 600 aiv_ssp_c 601 sccp_conn_fail_c 602 sccp_conn_timeout_c 603 sccp_release_c 604 global_reset_c 606 no_dtap_from_msc_c 608 ho_denied_assign_c 609 ho_denied_ciphering_c 610 ho_denied_clear_c 611 ho_denied_no_sccp_conn_c 612 100 Id:0900d805807f93e0 Confidential DN9814277 . 5. 3. Call Related DX Causes in BSC Counter name DN9814277 DX causes in BSC statistics Counter number DX cause DEC T7_expiry_c 613 T10_expiry_c 614 aiv_crct_res_timeout_c 615 aiv_crct_conn_timeout_c 616 aiv_crct_disconn_timeout_c 617 aiv_crct_rel_timeout_c 618 aiv_timeout_c 619 act_ctrl_timeout_c 620 invalid_bssmap_msg_c 621 unknown_a_pcm_c 622 ho_denied_no_proper_crc_c 623 ch_type_mismatch_c 624 aiv_transc_or_rate_unava_c 625 aiv_speech_version_unava_c 626 aiv_conn_refresh_timeout_c 628 aiv_conn_refresh_failed_c 629 rc0_hand_act_fail_c 700 a_crct_alr_res_c 701 a_crct_conn_err_c 702 rc0_crct_conn_timeout_c 703 access_out_of_crct_tbl_c 704 a_crct_rel_err_c 705 rc0_transc_or_rate_unava_c 706 rc0_cip_type_mismatch_c 707 rc0_inv_msg_contents_c 708 rc0_req_speech_ver_unava_c 709 rc0_hunting_queue_full_c 710 rc0_a_crct_congestion_c 711 rc0_a_search_error_c 712 rc0_crct_pool_mismatch_c 713 rc0_rej_due_eme_call_c 714 rc0_ilc_file_error_c 715 a_crct_conn_err_consec_c 716 a_tsl_user_mismatch_c 800 sc7_crct_res_timeout_c 801 sc7_crct_conn_timeout_c 802 sc7_crct_disconn_timeout_c 803 Id:0900d805807f93e0 Confidential 101 . DX causes in BSC statistics Counter name 102 Call Related DX Causes in BSC Counter number DX cause DEC sc7_crct_rel_timeout_c 804 a_tsl_blocked_c 805 a_tsl_status_unknown_c 806 lsi_access_fail_c 807 scc_access_fail_c 808 undef_tsl_in_lsi_c 809 crct_equipment_fail_c 810 reset_crct_c 811 sc7_ssp_c 813 a_pcm_fault_c 815 a_crct_removed_c 817 a_et_state_change_c 819 m_radio_if_mess_fail_c 900 m_radio_if_fail_c 901 m_r_if_f_rev_to_old_c 910 m_equipment_fail_c 914 m_no_radio_res_avail_c 915 m_req_terr_res_unava_c 916 m_cch_overload_c 917 m_processor_overload_c 918 m_bss_not_equipped_c 919 m_ms_not_eqipped_c 920 m_tr_cod_rat_ad_unav_c 921 m_ciph_alg_not_supp_c 922 m_terr_chan_alr_allc_c 923 m_prot_err_b_bsc_msc_c 924 m_unexpected_c 925 m_invalid_cell_c 926 m_invalid_msg_cont_c 927 m_ie_or_field_missing_c 928 m_incorrect_value_c 929 m_unknown_msg_type_c 930 m_unknown_ie_c 931 m_transc_or_rate_unavail_c 932 m_cip_type_mismatch_c 933 m_speech_version_unavail_c 935 Id:0900d805807f93e0 Confidential DN9814277 . Call Related DX Causes in BSC DX causes in BSC statistics Counter name Counter number DX cause DEC TCH REL DUE RAD FAIL PH 2-3 (incremented only in phases 2-3) 001205 ass_fail_msg_c 306 conn_fail_c 315 conn_fail_rad_inf_fail_c 316 conn_fail_rad_link_fail_c 317 err_ind_c 320 ho_fail_c 323 ho_detect_fail_c 324 ch_mode_mod_fail_c 349 ass_fail_c 350 error_report_c 354 conf_change_ms_fail_c 365 timing_advance_c 400 no_resp_from_coprocess_c 503 ms_is_lost_c 507 target_fail_c 510 source_fail_c 511 ass_fail_msg_c 306 conn_fail_c 315 conn_fail_rad_inf_fail_c 316 conn_fail_rad_link_fail_c 317 err_ind_c 320 ho_fail_c 323 ho_detect_fail_c 324 ch_mode_mod_fail_c 349 ass_fail_c 350 error_report_c 354 conf_change_ms_fail_c 365 timing_advance_c 400 no_resp_from_coprocess_c 503 ms_is_lost_c 507 target_fail_c 510 source_fail_c 511 TCH REL DUE RAD FAIL PH 12-14 (incremented only in phases 12-14) DN9814277 001206 Id:0900d805807f93e0 Confidential 103 . DX causes in BSC statistics Call Related DX Causes in BSC Counter name Counter number DX cause DEC TCH REL DUE BSS FAIL PH 12-14 (incremented only in phases 12-14) 001207 bts_fail_block_c 302 lapd_fail_block_c 303 abis_fail_block_c 304 abis_msg_corrup_to_bts_c 305 block_slave_c 307 ch_act_fail_c 314 data_ind_corrup_c 319 estab_ind_fail_c 321 estab_conf_fail_c 322 mode_mod_ack_fail_c 326 no_meas_result_c 327 no_resp_from_copro_c 328 phy_cont_conf_fail_c 329 rcs_alg_start_ack_fail_c 330 rcs_alg_cl_ack_fail_c 331 rc0_disco_ind_c 332 rf_ch_rel_ack_fail_c 333 rel_ind_fail_c 335 signalling_error_c 336 sapi_3_fail_c 343 sub_timer_c 367 estab_ind_corrupted_c 370 rrm_switch_crc_pool_c 401 has_state_conflict_c 505 clear_cmd_not_received_c 506 no_resp_to_ho_cpl_msg_c 508 aiv_hand_act_fail_c 600 aiv_ssp_c 601 sccp_conn_fail_c 602 sccp_conn_timeout_c 603 sccp_release_c 604 global_reset_c 606 no_dtap_from_msc_c 608 ho_denied_assign_c 609 ho_denied_ciphering_c 610 ho_denied_clear_c 611 ho_denied_no_sccp_conn_c 612 104 Id:0900d805807f93e0 Confidential DN9814277 . Call Related DX Causes in BSC Counter name DN9814277 DX causes in BSC statistics Counter number DX cause DEC T7_expiry_c 613 T10_expiry_c 614 aiv_crct_res_timeout_c 615 aiv_crct_conn_timeout_c 616 aiv_crct_disconn_timeout_c 617 aiv_crct_rel_timeout_c 618 aiv_timeout_c 619 act_ctrl_timeout_c 620 invalid_bssmap_msg_c 621 unknown_a_pcm_c 622 ho_denied_no_proper_crc_c 623 ch_type_mismatch_c 624 aiv_transc_or_rate_unava_c 625 aiv_speech_version_unava_c 626 aiv_conn_refresh_timeout_c 628 aiv_conn_refresh_failed_c 629 rc0_hand_act_fail_c 700 a_crct_alr_res_c 701 a_crct_conn_err_c 702 rc0_crct_conn_timeout_c 703 access_out_of_crct_tbl_c 704 a_crct_rel_err_c 705 rc0_transc_or_rate_unava_c 706 rc0_cip_type_mismatch_c 707 rc0_inv_msg_contents_c 708 rc0_req_speech_ver_unava_c 709 rc0_hunting_queue_full_c 710 rc0_a_crct_congestion_c 711 rc0_a_search_error_c 712 rc0_crct_pool_mismatch_c 713 rc0_rej_due_eme_call_c 714 rc0_ilc_file_error_c 715 a_crct_conn_err_consec_c 716 a_tsl_user_mismatch_c 800 sc7_crct_res_timeout_c 801 sc7_crct_conn_timeout_c 802 sc7_crct_disconn_timeout_c 803 Id:0900d805807f93e0 Confidential 105 . DX causes in BSC statistics Counter name 106 Call Related DX Causes in BSC Counter number DX cause DEC sc7_crct_rel_timeout_c 804 a_tsl_blocked_c 805 a_tsl_status_unknown_c 806 lsi_access_fail_c 807 scc_access_fail_c 808 undef_tsl_in_lsi_c 809 crct_equipment_fail_c 810 reset_crct_c 811 sc7_ssp_c 813 a_pcm_fault_c 815 a_crct_removed_c 817 a_et_state_change_c 819 m_radio_if_mess_fail_c 900 m_radio_if_fail_c 901 m_r_if_f_rev_to_old_c 910 m_equipment_fail_c 914 m_no_radio_res_avail_c 915 m_req_terr_res_unava_c 916 m_cch_overload_c 917 m_processor_overload_c 918 m_bss_not_equipped_c 919 m_ms_not_eqipped_c 920 m_tr_cod_rat_ad_unav_c 921 m_ciph_alg_not_supp_c 922 m_terr_chan_alr_allc_c 923 m_prot_err_b_bsc_msc_c 924 m_unexpected_c 925 m_invalid_cell_c 926 m_invalid_msg_cont_c 927 m_ie_or_field_missing_c 928 m_incorrect_value_c 929 m_unknown_msg_type_c 930 m_unknown_ie_c 931 m_transc_or_rate_unavail_c 932 m_cip_type_mismatch_c 933 m_speech_version_unavail_c 935 Id:0900d805807f93e0 Confidential DN9814277 . Call Related DX Causes in BSC DX causes in BSC statistics Counter name Counter number DX cause DEC TCH REL BSC BSC CONFLICT CALL (incremented only in phases 1-8 or 15) 001211 bsc_bsc_conflict_c 373 TCH REL BSC BSC CONFLICT TARG (incremented only in phases 12-14) 001212 bsc_bsc_conflict_c 373 DN9814277 Id:0900d805807f93e0 Confidential 107 .