TJ1500-R3 System Guide

System GuideTJ1500 © Copyright by Tejas Networks Ltd. 2000-2008 All Rights reserved worldwide. This document contains information that is the property of Tejas Networks Ltd. This document may not be copied, reproduced, reduced to any electronic medium or machine readable form, or otherwise duplicated, and the information herein may not be used, disseminated or otherwise disclosed, except with the prior written consent of Tejas Networks Ltd. Tejas Networks Ltd. reserves the right, without prior notice or liability, to make changes in equipment design or specifications. <<1.0>> i T able of Contents INTRODUCTION Product Family 6 6 SYSTEM OVERVIEW Product Releases TJ1500-R2 TJ1500-R3 Interfaces Service Interfaces Clock Interfaces Management Interface Engineering OrderWire Interface (EOW) Cross-Connect 8 8 8 9 9 9 10 11 11 11 HARDWARE DESCRIPTION Introduction Hardware Structure Card Configuration Details XCC02 XCC03 TE33 card (3xE3/DS3) TET63 (63xE1) A012 (2xSTM-1) A018 (8xSTM-1/2xSTM-4) A161 (1xSTM-16) A162 (2xSTM-16) A164T (1xSTM-16/4xSTM-4) TP01 (8xFE) TR03 (2xGE) TR04 (2xGE/8xFE) ELAN01 (8xFE/2xGE) Multi-Function Card (MFC1) Power Supply Module (PSM) Power Supply Module2 (PSM2) 12 12 12 13 15 15 15 16 16 16 16 17 17 17 17 18 18 18 19 19 SYSTEM FUNCTIONAL DESCRIPTION Configurations Terminal Multiplexer (TMUX) Add-Drop Multiplexer (ADM/MADM) Protection Equipment Protection Switching Cross-connect Card Redundancy Power Supply Redundancy 1+1 MSP MS-SPRing Protection Sub-Network Connection Protection (SNCP) Tributary Protection Switching Timing Reference Switching LCAS Protection Synchronization and Timing Network Management and Management Connectivity Power and Environment Monitoring Performance Monitoring 20 20 20 20 20 20 20 20 21 21 21 21 21 22 22 22 23 23 APPLICATIONS Networking Applications STM-16/4 Rings STM-1/4/16 Subtended Rings Ethernet Network Application Ethernet Private Line application Ethernet Virtual Private Line application Ethernet Private Local Area Network application Ethernet Virtual Private Local Area Network application 24 24 24 25 25 25 27 28 28 TEJAS NETWORK ELEMENT SOFTWARE NES Functions 30 30 NETWORK MANAGEMENT SYSTEM Characteristics of NMS TMN (FCAPS) Functionality Generic Features Advanced Features Network Management Functions Performance Management Fault Management Configuration Management Security Management Management Connectivity Networking based on LAN 32 32 33 33 33 33 33 33 34 34 35 35 TECHNICAL SPECIFICATIONS Interface Specification Interface Types STM-16 Interface Specification STM-4 Interface Specification (If Applicable) STM-1 Interface Specification (If Applicable) E1 Interface Specification E3/DS3 Interface Specification Ethernet Interface Specification Equipment Performance OrderWire Telephone Function Network Management Function EMI Safety Specification Power Supply and Power Consumption Mechanical Dimension Environmental Requirements Working Environment Packaging and Transportation 36 36 36 37 38 39 40 41 41 42 42 42 42 42 43 43 43 43 SYSTEM STABILITY SPECIFICATIONS ACRONYMS 45 46 ..................................... 12 Figure 3: STM-16/4 Ring Configuration................................................................... 26 Figure 6: EVPL Implementation .......... 28 Figure 8: EVPLAN Implementation ...................... 25 Figure 5: EPL implementation.................................................................................. 29 ............................................................................................................................................................................ 27 Figure 7: EPLAN Implementation.............................................................................................. 24 Figure 4: STM-16/4/1 Subtended Ring Structure...................................................................................................................................................................................................................................................................... 8 Figure 2: TJ1500 Slot View..........Table of Figures Figure 1: TJ1500 front view.......................... The product can also be configured with equipment redundancy for all or for a selected few among the modules. The TJ100 products provide the functionality of a high end SDH ADM (Add-Drop Multiplexer) with full drop capability. point-to-point –VCAT channels. 10/100Base-Fx and GE ports. The management system integrates the management of other Tejas Products as well. Digital crossconnect at fine granularity and data switching functionality along with the modular interface cards provide carriers a very flexible and most optimized way of configuring the product in their networks. The services are all software provisioned using the same line and interface cards as per ITU-T recommendations.1 Chapter Introduction The TJ1500 is a Synchronous Multiplexer at STM-16 line bit-rate and is software configurable to work as Terminal Multiplexer and Multiple Add-Drop Multiplexer. Configuration. The product can be configured in Ring and Linear architectures. allowing easy upgradation and expansion of networks. Accounting. STM-4 and STM-16 rates and also provides Ethernet interfaces at 10/100BaseT. which supports the full suite of FCAPS (Fault. TejNMS (Tejas Network Management solution) provides extremely easy provisioning of circuits across the network using a point and click user interface. The TJ1500 provides SDH and PDH interfaces at E1. E3/DS3. E3/DS3. Point-tomultipoint-VCAT channels and Multipoint to multipoint-VCAT channels. STM-1/4 tributaries). Support for data allows carriers to combine the functionality of data switching with transport. Standard open interfaces also allow the system to be managed by third party management systems. To summarize. The TJ1500 supports termination of one or more STM-16 ring(s) on the aggregate interfaces and multiple STM-1/4 rings at the tributary ports. STM-1. Product Family TJ1500 is part of the TJ100 family. Performance and Security) management. The STM-16 aggregate ring consists of TDM portion (drop/add of E1. Software Intelligence built into the products allow for intuitive element management using the Tejas Element Management System. These make the product ideal for backbone and high-speed links. Tejas Network Management solution and the TJ100 products provide the following features: Easy network manageability 6 . The products support a diverse range of data and circuit interfaces. 7 .Flexible Configuration Lower cost per line Easy upgradeability Support for both data and voice over SDH Higher reliability Tejas Networks Ltd. supporting redundancy of cross-connect fabric with a cross-connect capacity of 12.2 Figure 1: TJ1500 front view Chapter System Overview This chapter gives a brief overview of the salient product features and specifications of the TJ1500. Cards supported in TJ1500-R2 XCC02 Tejas Networks Ltd. It also has redundant power supply modules enabling power supply redundancy as well as power source redundancy. maximum 8U high multi-slot (two PSM slots. Figure 1 shows the front view of the TJ1500 network element. TJ1500-R2 The TJ1500-R2 is a STM-1/4/16. timing/synchronization subsystem. Product Releases TJ1500 has two releases till date. and control processor subsystem.5G. 8 . two aggregate card slots and nine tributary card slots) product. two XCC/controller card slots. Cards supported in TJ1500-R3 PSM2 (PSM2 card has to be used in TJ1500-R3 as it provides the necessary power dissipation for TJ1500-R3) XCC03 A162 Note 1: These cards are in addition to the cards supported in TJ1500-R2 Note 2: The cards that were supported in previous release continue to be supported along with the new cards. E3/D3 and 10/100BaseT/x and GE Interfaces (Long Haul). two aggregate card slots and nine tributary card slots) product. timing/synchronization subsystem. Interfaces Service Interfaces The TJ1500 supports the following interfaces—STM-1o/e.PSM A012 A018 A161 A164T TE33 TET63 TP01 TR03 TR04 ELAN01 TJ1500-R3 The TJ1500-R3 is a STM-1/4/16. Tejas Networks Ltd. 9 . The PSM2 provides higher power dissipation. E1. STM-16o. and control processor subsystem. maximum 8U high multi-slot (two PSM slots. It also has redundant power supply modules enabling power supply redundancy as well as power source redundancy. STM-4o. TJ1500-R3 supports redundancy of crossconnect fabric with a cross-connect capacity of 20G. two XCC/controller card slots. Table 1 lists the type and the number of interfaces available on the TJ1500 network element. E1 and STM-16 signals as clock.G703. the TJ1500 supports BITS-1. BITS-2. Clock Interfaces Tejas Networks Ltd. PDH Interface E3/DS3 E1 TE33 TET63 3 63 ELAN01 2 1000Mbps: SX. Table 1: TJ1500 Interfaces Interface Type Details Cards A161 STM-16 Optical Interface SDH Interfaces STM-4 Optical Interface STM-1 Optical Interface A162 A164T A164T A018 A012 A018 Maximum Interfaces Available 1 2 1 4 2 2 8 Supported in TJ1500-R3 Comments Note: The STM-1 interfaces in the A018 cards are field configurable to work as electrical or optical interfaces. Apart from the internal oscillator. 10 . A018 can also be configured to work as 2xSTM-4 by using ports 4 and 8 for STM-4. LX Ethernet Interface TR03 TR04 2 2 ELAN01 8FE 10/100Mbps: TR04 FE TP01 8FE 8FE The TJ1500 provides timing requirement as per ITU-T Rec. Sixty-four bytes of the SDH frame are used for IBC. Cross-Connect The TJ1500 provides cross-connect capability with a granularity of VC-4. Tejas Networks Ltd. DCC-R.Table 2: Clock Interfaces Interface Type Details BITS Interface BITS-1 (2Mhz) BITS-2 (2Mbps) Cards XCC02. 11 . IBC is facilitated using the ECC bytes (F1. The E1 and E2 bytes in the frame are used for the OrderWire application. F2. VC-3 and VC-12 bit rate. XCC03 A161 STM-16 interfaces A162 A164T Ports STM-4 interfaces A018 A164T A012 A018 Maximum interfaces available 1 1 1 2 1 2 4 2 8 STM-1 interfaces Management Interface The TJ1500 provides F1-UDC interface for Data communication applications and two serial interfaces for accessing the craft application. Engineering OrderWire Interface (EOW) The TJ1500 provides an EOW interface for equipment maintenance. and DCC-M) and the E1 and VC-12 management channels on the STM ports. XCC03 XCC02. 384 x 384 VC-3 and 8064 x 8064 VC-12. The cross-connects are nonblocking and can be created dynamically between STM rings terminating on the TJ1500 network elements. The valid combinations of cross-connects supported are 128 x 128 STM-1. 6. The cross-connect and controller cards (XCC02/XCC03) are fixed in slots 8 and 9. STM-4. 3. 10/100 BaseT and 10/100 BaseFx and Gigabit Ethernet. 5. These common cards do not carry traffic and serve functions such as Power Filtering. Figure 2: TJ1500 Slot View Tejas Networks Ltd. 11. The fan tray unit is provided in slot 17. Hardware Structure The Multi-Function Card (MFC) is horizontal and is provided at the top of the chassis (slot 16). 12 . including the common cards. E1.3 Chapter Hardware Description Introduction The TJ1500 is a multi-slot chassis product. STM-1 electrical. The Aggregate cards can be fixed in slots 7 and slot10. STM-16. 13 and 14. Tributary cards can be inserted in slots 2. 4. The Power Supply Module (PSM/PSM2) is provided in the vertical slots 1 and slot 15. The line cards can support STM-1. which provides 12 traffic slots for aggregate and tributary cards. 12. and E3/DS3. Cross-connect and System controller (XCC performs function of both the cross-connect and system controller). BITS Clock Two 3-pin power D-type connectors Two 3-pin power D-type connectors One Order wire interface 10/100 Mbps NMS Ethernet interface One Serial interface for craft applications One Serial interface for Modem One Alarm-in interface One Alarm-out interface Comments Supported in TJ1500-R2 Supported in TJ1500-R3 Supported in TJ1500-R2 Supported in TJ1500-R3 XCC02 XCC03 PSM PSM2 MFC1 8.4.6. 15 1.5.4. 13 .3.12. 9 1.13. BITS Clock One Diag interface.5.6. 9 8.3. 15 16 TE33 2.14 3 E3/DS3 interfaces TET63 2. 11. 63 E1 interfaces E1 Input: Metral Connectors Tejas Networks Ltd.Card Configuration Details Table 3 gives the details of the cards and the interfaces present on the cards used in the TJ1500. Of Interfaces One Diag interface. Table 3: Card Configuration Details Card Slot Acronym No. 5.6. 12. 5. 4.12. A161 A162 7.12. A018 2.4. 11. 10 One STM-16 interface Two STM-16 interfaces Supported in TJ1500-R3. They can be used in slots 2.6.13. 4. The STM-1 ports are field configurable to work as electrical or optical ports. Not supported in slot 12 in TJ1500-R2.5. 11. 3. 11.3. 13 and 14 in TJ1500-R3. 11. 11.3. 6. 11.6. 3.3. 11. 12. 14 .14 ELAN01 2.4. TP01 2.12.13.6.4.14 A012 2. 13 and 14 in TJ1500-R3.14 Eight STM-1 interface Or Two STM-4 interfaces Not supported in slot 12 in TJ1500-R2. 12. 6. 11.11. They can be used in slots 2. 6.6.5. Not supported in slot 12 in TJ1500-R2. 3. 12.5. They can be used in slots 2.13. 13 and 14 in TJ1500-R3. 5. 13 and 14 in TJ1500-R3.13.13.13. 11.14 8 FE electrical interfaces 2 GE interfaces Not supported in slot 12 in TJ1500-R2. 4. 5. 13 and 14 in TJ1500-R3.3.14 Two GE interfaces Tejas Networks Ltd.12. 12. They can be used in slots 2.4. 6.14 Eight FE electrical interfaces Two STM-1 interfaces Not supported in slot 12 in TJ1500-R2. 10 7. TR04 2.12.3.5.3.12.13. They can be used in slots 2.4.12.5. 11. 3.4. 3. 5.6. 11. 4. 4.14 8 FE electrical interfaces 2 GE interfaces TR03 2.5. 6. Apart from the LEDs. Status and Active LEDs are also provided to indicate the power on and working status of the card. when all input references fail. The card has the processor to perform functions such as MSP. a push button switch is provided for hot swap capability. and 4 level clocks to all the line cards in the chassis. 4E. The timing synchronizer in the XCC03 provides Stratum-3. a push button switch is provided for hot swap capability.5 G crossconnect capacity. TE33 card (3xE3/DS3) The TE33 card is used as a tributary card in the TJ1500 system and supports three ports for E3/DS3 channels in a single card.A164T 5. when all input references fail. IBC routing. Status and Active LEDs are also provided to indicate the power on and working status of the card. The card has the processor to perform functions such as MSP. IBC routing. In the holdover mode. In the holdover mode. Apart from the LEDs. The front panel has a Diag interface for NMS connection and BITS clock interface for clock input. A164T card is supported only in slot 12. the timing synchronizer provides the primary and secondary clocks for synchronization. 15 . XCC03 The XCC03 is the cross-connect controller card that provides 20 G cross-connect capacity. the timing synchronizer provides the primary and secondary clocks for synchronization. In TJ1500-R2. In TJ1500-R3 A164T card is supported slot 5 & slot 12. inter-card communication. 12 One STM-16 interface Or Four STM-4 interfaces Field configurable as either 1xSTM-16 or 4xSTM-4. FAN 17 - XCC02 The XCC02 is the cross-connect controller card that provides 12. The front panel has a Diag interface for NMS connection and BITS clock interface for clock input. node management and alarm processing by the TJ1500-R2 network element. The timing synchronizer in the XCC02 provides Stratum-3. 4E. node management and alarm processing by the TJ1500-R3 network element. inter-card communication. Tejas Networks Ltd. and 4 level clocks to all the line cards in the chassis. Status and Active LEDs are provided to indicate the power on and working status of the TET63 card. This card provides line interfaces to 63 E1 channels respectively in both add and drop directions. Two LEDs for each optical port is used for transmit and receive laser status. Status and Active LEDs are provided to indicate the power on and working status of the card.6 W. the faceplate also has Status and Active LEDs to indicate the power on and working status of the TE33 card. Status and Active LEDs are provided to indicate the power on and working status of the card. TET63 (63xE1) TET63 is a 63 E1 tributary interface card. The card receives an input supply of 12 V isolated DC. The typical power consumption of A018 card is 34 W. The card supports live insertion and hot-swap. TET63 card has TLC. SFPs of STM-4 capacity is plugged in at ports 1 and 5. grouped into three sets (each with two connectors) each providing an interface for 21 E1 channels. A018 (8xSTM-1/2xSTM-4) The A018 Line card/Aggregate card is a SDH optical line interface card for TJ1500 that can operate as STM-1o/e speed using different assembly. TET63 card can be configured in UI to work from 120 Ohms as well as 75 Ohms E1 input. Status and Active LEDs are provided to indicate the power on and working status of the card. Each of the three ports on the card is independently software configurable to support E3/DS3 rates. The TE33 card receives approximately 12 V DC from backplane. The power dissipation of the TE33 card is approximately 10 W. which have six 48-pin Metral connectors at the front.The face plate of the TE33 card has six BNC interfaces for the 3 E3/DS3 Channels ports. The typical power consumption of TET63 card is 14. In STM-4 mode. The typical power consumption of A161 card is 22 W. A012 (2xSTM-1) The A012 card provides two STM-1 interfaces to the TJ1500 system. The card receives an input supply of 12 V isolated DC. Besides the ports. 16 . Tejas Networks Ltd. A161 (1xSTM-16) The A161 Line card/Aggregate card is a SDH optical line interface card for TJ1500 that can operate at STM-16 speed. The card receives an input supply of 12 V isolated DC. The typical power consumption of A012 card is 11 W. The optical ports have provision of small form-factor optics and are thus field configurable for the type of interface required. The card receives an input supply of 12 V isolated DC. 10/100 Mbps Tx ports. Two LEDs for each optical port is used for transmitter and TR03 (2xGE) Tejas Networks Ltd. Two LEDs for each optical port is used for transmitter and receiver laser status. 17 . TR03 card maps and de-maps the Ethernet ports into SDH. Status and Active LEDs are provided to indicate the power on and working status of the card. Ethernet data from GE ports are mapped onto GFP (GFP-F). The card receives an input supply of 12 V isolated DC from backplane. Two-port 1000 Mbps optical interfaces are provided through SFP modules. The A164T line card/aggregate card is an SDH optical line interface base card for TJ1500 that can operate at STM-4/16 speed using different assemblies. The Fast Ethernet interface is supported via RJ-45 connectors. TP01 card maps and de-maps the Ethernet data into the virtual containers of different granularity (VC-11/VC-12/VC-3/VC-4) of the SDH frame. Two LEDs for each optical port is used for transmitter and receiver laser status. The VC in which the data is mapped/de-mapped is programmable on a per port basis. Status and Active LEDs are provided to indicate the power on and working status of the TR03 card. The typical power consumption of A162 card is 22 W. Status and Active LEDs are provided to indicate the power on and working status of the TP01 card. This card supports live insertion and hot-swap capability. through software. Two LEDs for each optical port is used for transmitter and receiver laser status. The card receives an input supply of 12 V isolated DC from backplane. which provides line interface to Gigabit Ethernet (GE) and supports GE through two SFP interfaces. A164T is field configurable to 4xSTM-4 or 1xSTM-16. The typical power consumption of TP01 card is 8 W. A164T (1xSTM-16/4xSTM-4) TP01 (8xFE) The Ethernet tributary card. The card receives an input supply of 12 V isolated DC from backplane.A162 (2xSTM-16) The A162 Line card/Aggregate card is a SDH optical line interface card for TJ1500-R3 that can operate at STM-16 speed. TP01 provides line interface to eight. TR03 is a tributary interface card. Status and Active LEDs are provided to indicate the power on and working status of the card. A164T has either port 1 for 1xSTM-16 configuration or port 2-4 for 4xSTM-4 configuration. The typical power consumption of A164T card is 34 W. Multi-Function Card (MFC1) The MFC1 card has interfaces for all the management functions. TR04 (2xGE/8xFE) ELAN01 (8xFE/2xGE) ELAN01 is a tributary interface card. The typical power consumption of TR03 card is 15 W. 18 . The card receives an input supply of 12 V isolated DC from backplane. The card receives an input supply of 12 V isolated DC from backplane. Status and Active LEDs indicate the power on and working status of the ELAN01 card. In addition to supporting EOS applications. Eight 10/100 Mbps fast Ethernet interface is supported via RJ-45 connectors. ELAN01 is capable of switching at L2 level and doing traffic classification from L2 to L7 level. Two LEDs for each optical port is used for transmit and receive laser status. Status and Active LEDs are provided to indicate the power on and working status of the TR04 card. It is fixed at the top of the TJ1500 chassis and connected to the backplane. Two LEDs for each optical port is used for transmitter and receiver laser status. The ELAN01 card receives 12 V DC from the backplane. Two-port 1000 Mbps optical interfaces are provided through SFP modules. TR04 is a tributary interface card. Tejas Networks Ltd. ELAN01 supports live insertion and hot swap capability. It also provides line interfaces to eight 10/100 Mbps Rx and Tx port. The typical power consumption of ELAN01 card is 35 W.receiver laser status. which provides line interface to 8x10/100 Mbps (FE) and 2x1000 Mbps (GE) Ethernet ports. It has the following management interfaces along with the visual alarm indicators: OrderWire interface 10/100 Mbps NMS Ethernet interface Two serial interfaces for craft/modem applications Alarm input and Alarm output interfaces Alarm and power indication LEDs The MFC1 card receives 12 V DC from the backplane. TR04 card maps and de-maps the Ethernet ports onto SDH. The typical power consumption of MFC1 card is 8 W. which provides line interface to Gigabit Ethernet (GE) and can support GE in two SFP interfaces. The typical power consumption of TR04 card is 15 W. Power Supply Module (PSM) The Power Supply Module (PSM) is part of the chassis of the TJ1500-R2. The units provide a filtered input voltage of -40 V to -60 V and the unit provides a 12 V supply to all the cards. The two LEDs—STATUS and ACTIVE—provide a visual indication of the input voltage. The 12 V supply is generated through an isolated DC-DC converter. The two LEDs—STATUS and ACTIVE—provide a visual indication of the input voltage. The cards are provided with a mechanical circuit breaker to cut off supply in the event the card draws more current than the stated limit. The PSM provides total output power of 280 W. The cards have reverse polarity protection to protect the system from damage in the event the input is given with reversed polarity. the output voltage and the state of the card. the output voltage and the state of the card. The cards are provided with a mechanical circuit breaker to cut off supply in the event the card draws more current than the stated limit. The filters have transient voltage suppressors to prevent voltage surges affecting the system. The PSM2 provides total output power of 500 W. The filters have transient voltage suppressors to prevent voltage surges affecting the system. There are two PSMs in the TJ1500-R2 network element to provide input source redundancy. The 12 V supply is generated through an isolated DC-DC converter. An electrical circuit breaker provides protection from over voltages and under voltage at the input. An electrical circuit breaker provides protection from over voltages and under voltage at the input. MFC1 card and the Fan tray units. An EMI filter is used to restrict conducted emissions. The cards have reverse polarity protection to protect the system from damage in the event the input is given with reversed polarity. Tejas Networks Ltd. The units provide a filtered input voltage of -40 V to -60 V and the unit provides a 12 V supply to all the cards. An EMI filter is used to restrict conducted emissions. There are two PSM2s in the TJ1500-R3 network element to provide input source redundancy. MFC1 card and the Fan tray units. 19 . Power Supply Module2 (PSM2) The Power Supply Module2 (PSM2) is part of the chassis of the TJ1500-R3. the hardware is substituted without affecting the traffic. Cross-connect Card Redundancy The TJ1500 facilitates cross-connect redundancy by having cross-connect cards in Slots 4 and 5. In an event of hardware failure. The processor bus is shared across all the tributary cards. All the traffic related devices on each cross-connect card is always under the control of the active cross-connect card. Power supply unit and Fan) and a suitable combination of E1/DS1/E3/DS3/STM-1o/STM-1e and Ethernet tributary cards. The active cross-connect card takes control of all the processor bus signals on the backplane. As an ADM/MADM. Power Supply Redundancy The PSM/PSM2 has two power supplies to facilitate power supply redundancy. Add-Drop Multiplexer (ADM/MADM) The ADM configuration is achieved with the base chassis (Cross-connect card. The ADM/MADM configuration is used whenever the TJ1500 is a part of a ring or linear chain. The output of both the power supplies are shorted together on the backplane and then in turn given to all the cards. Software on each cross-connect card decides which cross-connect card is the active controller. Power supply unit and Fan) and a suitable combination of E1/DS1/E3/DS3/STM-1 and Ethernet tributary cards. the TJ1500 is capable of adding/dropping upto one STM-16 worth of traffic. Tejas Networks Ltd. 20 .4 Configurations Chapter System Functional Description Terminal Multiplexer (TMUX) The TMUX configuration is achieved with the base chassis (Cross-connect card. Protection Equipment Protection Switching Equipment protection switching accommodates various hardware failures while the transport facility is still functional. Both revertive and non-revertive modes of MSP are supported and the Wait-to-Restore (WTR) time is configurable. The receiving network element monitors the virtual containers (VCs) from different paths. Protection switching is software controlled and the XCC provides all the alarms for the switching to be initiated. When a failure occurs on the selected reference (Alarms. Tejas Networks Ltd. The VC with better performance is selected for de-mapping. Timing Reference Switching A timing reference for the equipment is selected from a pool of available references. In case of any fault in the work path. Frequency Out-of-Range). The SNCP protection is initiated in the occurrence of Signal Fail (SF) or Signal Degradation (SD) condition. MS-SPRing Protection The TJ1500 supports two-fiber MS-SPRing where two fibers share service and protection equally. In SNC/I. 21 . Timing reference switching is software controlled and the cross-connect card provides all the alarms for the switching to be initiated. In SNC/N mode. (SNC/N). such as interoffice networks and access networks. Sub-Network Connection Protection (SNCP) Tributary Protection Switching Tributary protection switching is available in the ADM configuration. the timing reference is switched to the next available reference after going to holdover momentarily. Sub Network Protection Path is a path protection switching and is supported for the VC-4. Path level protection is not available in the 1+1 MSP scenario. Faults in connectivity can be detected using the SNC/N mode. VC-3 and the VC-12 container levels. the extra traffic is interrupted and the normal traffic is switched in the protect path. This is a VC12/VC-3 path level protection scheme that uses the broadcast feature of the crossconnect fabric.1+1 MSP 1+1 MSP is available only in the TMUX configuration. The TJ1500 supports both Sub-network Connection Protection with Inherent Monitoring (SNC/I) and Sub-network Connection Protection with non-Intrusive Monitoring. the network element uses the inherent information in the network such as Connection status and performance data to monitor the connection. the diagnostic data in the received traffic is used to monitor the connection. Faults in the service layer are detected using the SNC/I mode. the protect path carries extra traffic. Protection switching is software controlled and the cross-connect card provides all the alarms for the switching to be initiated. Under normal working conditions. TJ1500 network element in a MS-SPRing can terminate traffic it receives from either side of the ring and is suited for distributed node-to-node traffic applications. LCAS Protection Link Capacity Adjustment Scheme or LCAS is a method to dynamically increase or decrease the bandwidth of virtual concatenated containers. Ports provide reference clock at E1/E3/STM-1/4/16 rates. BITS-1 is an external source which provides 2 MHz reference clock.7042 specifications. LCAS protection provides uninterrupted data traffic without requiring excess protection bandwidth allocation The TJ1500 recognizes the LCAS capability of the link partners when the network elements in a link use Virtual Concatenation (VCAT) for connection. If the transmitting network element does not receive any LCAS control message from the partner. Together with diverse routing. Synchronization and Timing The TJ1500 uses synchronization sources as per ITU-T G. The TJ1500 supports LCAS as per the G. The protocols of the TejNMS comply with the ITU-T and ISO standards. Tejas Networks Ltd. The TJ1500 sends LCAS control-messages on a VC bundle to the link partner. Network Management and Management Connectivity The network of the TJ1500 can be managed using the Tejas Network Management System (TejNMS). A failed member will automatically cause a decrease of the bandwidth and after repair the bandwidth will increase again without any hits. The TJ1500 uses two clock sources for synchronization apart from the internal Stratum3 clock source (Oscillator)—Ports and BITS. it assumes that LCAS is disabled in the link partner. and management (OAM) of the network comprising the TJ1500. The management connectivity is facilitated using the RJ45 connector provided on the MFC1 card. LCAS in the TJ1500 network element also provides a protection mechanism for Ethernet circuits without physically consuming the bandwidth by temporarily removing failed members from the VCG. LCAS is implemented using the overhead byte reserved for transmitting control information in a VCG to dynamically adjust the number of VCs in the VCG as per the bandwidth availability.703 standard. administration. The priority of the clock source is user configurable. 22 . The TejNMS performs centralized operation. the TJ1500 can dynamically adjust the bandwidth according to the service bandwidth availability in a hitless manner. BITS-2 is also an external source and provides 2 Mbps reference clock. Thus. 23 . The alarms can be configured and are displayed on the craft terminal user interface. TJ1500 supports up to seven environmental alarms. The performance parameters are calculated for current interval. Tejas Networks Ltd. 15-minute intervals and for the previous day. The performance monitoring at each level in the maintenance hierarchy is based on BitInterleaved-Parity (BIP) checks calculated on frame by frame basis for SDH mode. major. Errors detected in the Higher Order (HO) path and Lower Order (LO) Path BIP cause the respective Remote Error Indication (REI) signals to be sent upstream. equipment room door open etc. The thresholds for the performance monitoring parameters are user configurable using the software. Performance Monitoring The performance monitoring is based as per ITU-T G. minor.828 standards. The alarms are classified as critical. The BIP checks are inserted in the Overheads associated with the Section and Path.Power and Environment Monitoring The TJ1500 has an Alarm input interface on the MFC card to detect unfavorable environment conditions such as Power or air conditioning failure. deferred alarms or warning depending on severity.826/G. 5 This chapter explains the networking applications of the TJ1500. Figure 3: STM-16/4 Ring Configuration Tejas Networks Ltd. Networking Applications The TJ1500 can be used in the following network topologies: Chapter Applications STM-16/4 Rings The TJ1500 can be used in an end-to-end network configuration from the customer premises to the optical core. 24 . STM-16/4 network is built using TJ1500 providing low drop requirements at a couple of locations. The modules are able to insert/drop traffic through the switching matrix to any of the other tributary/aggregate cards. or Line Terminating Equipment (LTE) performing Line. It is possible to connect a mix of STM-1/4/16 rings through the TJ1500 network element. EPL can strictly ensure bandwidth and user isolation without any need to adopt a Quality of Service (QoS) mechanism. The Figure 5 shows the EPL implementation using TJ1500.The STM-1/4/16 tributary modules of TJ1500 can act as SDH network element completing the Subtended Rings. different customers needn’t share SDH bandwidth. Span or Ring Switching as well as DCC pass. 25 . Figure 4 shows the pictorial representation of the subtended ring structure using TJ1500. Figure 4: STM-16/4/1 Subtended Ring Structure STM-1/4/16 Subtended Rings Ethernet Network Application The TJ1500 can be used in the following Ethernet applications: Ethernet Private Line application Ethernet Private Line (EPL) puts two service access points as a basic unit to realize the point-to-point transparent transmission of Ethernet MAC frame. security mechanism or MAC address learning. Therefore. Tejas Networks Ltd. Applying EPL. Tejas Networks Ltd. Similarly Users A2 and User A3 at Station A have separate LAN network to connect to Users C2 and D1 respectively. This way each user has a separate line dedicated for communication with different users. User-A1 at Station A connects to User-B1 at Station B and UserC1 at Station C using LAN1 and LAN 2 respectively. 26 .Figure 5: EPL implementation In Figure 5. A VLAN ID or other mechanism to distinguish data from different users is provided. A separate VLAN ID is provided at the ingress of ports assigned to the User A1. based on the VLAN ID of the port from where the packet is received. the corresponding QoS mechanism needs to be provided. Based on the destination address in the packet.Ethernet Virtual Private Line application In Ethernet Virtual Private Line (EVPL) application. If different users require different service quality. Figure 6: EVPL Implementation In Figure 7. Hence here the available bandwidth is used efficiently. Tejas Networks Ltd. C2 at Station C. Figure 6 shows the implementation of the EVPL using TJ1500. A2 at Station A and between Users C1. the packet reaches its destination that is either User C2 or User D1. When a packet arrives from User A1. A3 and Users D1 and D2 at Station D. 27 . A2 and A3. Similarly VLAN Trunk 3 is provisioned between Users A2. VLAN Trunk 2 is provisioned between Users A1. different users share the same SDH bandwidth for communication. the packet is broadcast to VLAN Trunks 2 and 3. Figure 8 shows the implementation of the EVPLAN using the TJ1500 network element. The User A1 communicates to User C1 at Station C and User B1 at Station B through LAN 1. so EPLAN possesses strict bandwidth guarantee and user isolation without a need to adopt any QoS mechanism and security mechanism. The Figure 7 shows implementation of EPLAN using TJ1500. Because it has multi-node. QoS mechanism ensures different service quality for different users. Thus each user gets a separate bandwidth for communication. Different users need not share the same SDH bandwidth. Ethernet Virtual Private Local Area Network application In Ethernet Virtual Private Local Area Network (EVPLAN) application. 28 . Figure 7: EPLAN Implementation Ethernet Private Local Area Network application In Figure 7. it needs to implement data forwarding and MAC address learning. User A2 communicates with users C2 at Station C and D1 at Station D through LAN 2. a separate LAN network is provisioned for each individual User (A1. Similarly. A2 and A3) at Station A. A mechanism such as VLAN tag distinguishes data from different users. Tejas Networks Ltd. different users share the SDH bandwidth.EPLAN (Ethernet Private Local Area Network) has at least two service access points. In case of conflict for bandwidth. the packets are routed based on QoS. Tejas Networks Ltd. the users at Station A communicate with all the users in Station B. 29 . The packet is routed to the correct destination based on the VLAN tag and the destination address.Figure 8: EVPLAN Implementation In Figure 8. C and D through the same VLAN trunk. the IP address can be assigned using the serial port provided on the MFC card of the network element. Cross-connect configuration .supports up to ten simultaneous login sessions on a single network element. The TejNES can support up to eight simultaneous logins to the network element. Tejas Networks Ltd. drop. Auto-discovery .allows the configuration of Embedded Communication Channel (ECC) and management channel. Inventory .allows the configuration of STM. PDH. The main capabilities of TejNES are as follows: Network Element Access: The embedded SNMP agent in the TejNES communicates with the network element based on the IP address of the network element. add-drop and pass-through cross-connects. The TejNES presents the current situation of the network element.facilitates viewing the details and status of the inventory present on the network element. Port configuration . The system running the TejNES is connected to the network element using the craft interface.automatically discovers and stores the IP addresses of the neighboring network element. Multi-user login . The TejNES is a standalone Web User Interface (WUI) application and the user has to log on to the application for it to function. Chapter Tejas Network Element Software The TJ1500 network element is initialized to operation using the Tejas Network Element Software (TejNES). and Ethernet and VCG ports.facilitates the configuration of add. The TejNES application can be accessed using a LAN cable. DCN configuration . In case the network element does not have an IP address. The TejNES is a standalone application that runs on a Windows or Linux platform.6 NES Functions The TJ1500 node is managed through the embedded NES (Network Element Software). 30 . Performance data .allows setting filters for alarms from specified entities.displays the performance data for current interval. The TejNES also presents the history of all the events that occurred and stored on the network element. LAG and Diffserv and QoS policies. Loopback testing .allows upgrading/downgrading of the NES.Protection configuration . MS-SP and SNCP protection.displays all the alarms raised on the network element in order of severity. Configuration backup/restore . 15-minute interval and the performance data of previous day.facilitates configuring MSP. Alarm filtering . Ethernet and VCG interfaces for testing purposes. VLAN.restricts access based on user profiles.allows the current network element configuration to be backed-up on a remote or local system. Software upgrade/download . CSTP and RSTP). Also allows a backed up configuration and factory default settings to be restored on the network element. 31 . Layer 2 feature configurations . Alarm notification . PDH. Tejas Networks Ltd. Security .facilitates configuring bridges (MSTP.allows creation of terminal and facility loopbacks on SDH. NMS design is based on the Open Systems Interconnect (OSI). The NMS GUI forms a single Network Operation Center (NOC). The service providers with NOC operations can use state-of-art graphical interface to configure and set up the Tejas network elements.7 Chapter Network Management System Tejas Network Management System (TejNMS) provides integrated management of network elements across an intelligent optical network. 32 . Characteristics of NMS NMS is based on Client-Server model. Service providers with NOC operations can use the network-wide view presented by TejNMS to configure and set-up Tejas network elements with ease. It monitors the EMS level alarms and the node level alarms of the nodes managed by the EMS. enabling centralized monitoring and control of the Tejas optical products. The features of the NMS are broadly classified into the following three main categories: Features based on TMN (FCAPS) functionality Tejas Networks Ltd. The TejNMS collects and represents data from geographically dispersed network elements on to a console in a centralized Network Operations Center (NOC). The NMS monitors and manages the EMS. The NMS server monitors the managed Element Management System (EMS). “FCAPS” model of Management Functional Areas (MFAs). C. Performance data is visible only for the circuits displayed in the TejNMS.Configuration Management: provides the service and resource provisioning. The color code is given below: Red – Critical. 33 .Accounting Management: enables the collection of data to support report generation and asset management.Performance Management: enables gathering of statistics for planning. minor. deferred and warning) on the Graphical User Interface (GUI). An alarm counter/banner displays the alarm count. P. The alarm counter/banner refreshes automatically and is color coded based on severity of the alarm.Security Management: enables the control of access to network resources to maintain reliability.Fault Management: helps to identify. S. A. troubleshooting and providing customer reports.Generic features Advanced features TMN (FCAPS) Functionality The functionalities of the FCAPS are: F. Major Fault Management Tejas Networks Ltd. Fault management monitors all the TJ1500 network elements and its network path in real-time and displays the count of each type of alarm raised (critical. Generic Features Scalable architecture Database backup Modular User Interface Advanced Features Web based Access Trend Analysis Network Management Functions Performance Management Performance management reports and evaluates the transmission performance parameters of the Tejas network elements. locate and repair problems. Its main responsibility is to collect performance data of the network element in the communication network for monitoring and revising the status and performance of the network or the network element. The TejNMS allows the configuring the type of performance data to be collected from each network element and stores the collected data for at least 30 days. major. Security management relates to all management functions namely. Configuration Management Configuration management in TejNMS allows a user to manage the changes made to the configuration of the network devices. only viewing) OPERATOR (all day-to-day provisioning. Tejas Networks Ltd. The TejNMS also recovers all the active alarms on reestablishment of connection when there is any communication loss with the network elements. and so on. the configuration management also collects information on the device hardware and software inventory. Ethernet IP and all other day-to-day provisioning. 34 . The alarms can also be exported which helps the alarms to be stored for a longer duration. Warning The TejNMS displays alarms raised on each individual network element and also the total alarms raised on the entire network in real-time. Besides managing configuration. The probable cause of the alarms is also displayed for each alarm. configuration and performance monitoring) OPERTOR2 (configuring network element name. The Network operators can add remarks and acknowledge the alarms. Alarms for upto 30 days can be stored and viewed. fault monitoring. The user can configure the network element and roll back to previous configuration in case of any trouble. management of user grade and authority. backup. The TejNMS defines multiple users with different privileges for accessing the network. Besides. they can also sort the alarms based on user-defined criteria and generate reports on alarms for the entire network. The following are the user privileges: USER (read-only. access control. viewing and comparison. fault monitoring.Orange – Minor Yellow .Deferred. router ID. Managing configuration changes includes collection. Security Management Security management ensures safety against unauthorized persons from accessing network resource and equipment illegally. data security and operation log management. cards. archive. administration of subnetworks/topology) The security management provides the password administration and audit trail features. The TejNMS also indicates if the regional NOC (EMS) has acknowledged the alarm. circuits. configuration and performance monitoring) ADMIN (user account management. Auto-negotiation is enabled. which has necessary circuit for the physical interface. so that each operation does not request for the authentication again and again.In the password administration feature. the user will not be prompted for the EMS user/password information. Tejas Networks Ltd. Only the ADMIN account(s) can know the EMS passwords. Management Connectivity The TJ1500 has multiple options for management connectivity. remote management via in-band communication or dial-up. These user accounts are different for each EMS. operation status (success/failure) and time. It has a RJ-45 connector and implements a NIC port configuration. For OPERATOR or OPERATOR2 privileges. 35 . Networking based on LAN TJ1500 is locally managed using a 10/100BaseT Ethernet interface located on the front panel. All node configurations and maintenance operations can be performed using a simple graphical user interface. All the physical management connectivity is terminated on MFC1 card. Some of the options are Local craft terminal (LAN Interface). The ADMIN configures these accounts once while administering the EMS/Sub-Network. the administrator/user can set the user login and password. The Audit Trail feature helps to maintain a detailed audit trail of all the operations performed along with the user name. The TJ1500 implements the HTTP protocol to communicate with the browser. The local craft station is a PC with a standard web browser. 8 Interface Specification Chapter Technical Specifications Interface Types SDH interface PDH interface Ethernet interface Clock interface Alarm interface Interface Type STM-16/4/1 interfaces 63 E1. 1000 BaseSX/LX/LH BITS-1 (2 MHz signal) BITS-2 (2 Mbps signal) Alarm In and Alarm Out interfaces SNMP interface (for NMS) Management interface RS-232 port (craft interface) In-band channel control 10/100 Base T (RJ-45) Management interface OrderWire interface Two-wire analog telephone interface for Engineering OrderWire (E1 or E2 bytes access) Details Tejas Networks Ltd. 100 Base-Fx. 3 E3/DS3 10/100 Base-Tx. 36 . 2 -27 -9 0 -5 8.1 1280-1335 SLM S-16. 37 .1 1260-1360 SLM Values dBm +3 -2 8.2 -18 0 Tejas Networks Ltd.STM-16 Interface Specification Parameter Digital signal Nominal bit rate Optical Interface Operating wavelength Source type Spectral characteristics: -Maximum RMS width (s) -Maximum –20dB width Mean launched power: Maximum Minimum Minimum extinction ratio Minimum sensitivity Minimum overload dB dBm dBm Nm Nm 1 1 Nm MLM Unit Mbps L-16. 5 Nm MLM 1300-1325/ 1296-1330 MLM Unit Mbps L 4.1 12931334/12741356 MLM Values dBm +2 -3 10 -28 -8 +2 -3 10 -28 -8 -8 -15 8. 38 .1 1280-1335 SLM S 4.STM-4 Interface Specification (If Applicable) Parameter Digital signal Nominal bit rate Optical Interface Operating wavelength Source type Spectral characteristics: -Maximum RMS width (s) -Maximum –20dB width Mean launched power: Maximum Minimum Minimum extinction ratio Minimum sensitivity Minimum overload dB dBm dBm Nm Nm 2.0/1.7 1 4/2.2 -28 -8 Tejas Networks Ltd. STM-1 Interface Specification (If Applicable) Parameter Digital signal Nominal bit rate Optical Interface Operating wavelength Source type Spectral characteristics: -Maximum RMS width (s) -Maximum –20dB width Mean launched power: Maximum Minimum Minimum extinction ratio Minimum sensitivity Minimum overload dB dBm dBm Nm Nm dBm 0 -5 10 -34 -10 0 -5 10 -34 -10 -8 -15 8.7 - Tejas Networks Ltd.1 1 7. 39 .2 -28 -8 3 - Unit Mbps Values L 1.1 Nm MLM 1263-1360 MLM SLM 1261-1360 MLM S1. 05 Nominal peak voltage of a mark (pulse) Peak voltage of a space (no pulse) Nominal pulse width Ratio of the amplitudes of positive and negative pulses at the centre of the pulse interval Ratio of the widths of positive and negative pulses at the nominal half amplitude Maximum peak-to-peak jitter at an output port 0.237 V for coaxial pair 0+/-3 V for symmetrical pair 244 ns 0. 40 .5 B2 unit interval peak-to-peak – 0.37 V for coaxial pair 3 V for symmetrical pair 0 +/. The value V corresponds to the nominal peak value One coaxial/Symmetrical pair 75 Ohms resistive for coaxial pair 120 Ohms resistive for symmetrical pair 2.95 to 1.95 to 1.0.2 Tejas Networks Ltd.05 B1 unit interval peak-to-peak – 1.E1 Interface Specification Parameter Pulse Shape (nominally rectangle) Pair(s) in each direction Test load impedance Value All marks of a valid signal must conform to the mask irrespective of the sign. 15 Ethernet Interface Specification Parameter Link power budget (dB) Operating distance (nominal) (m) Channel insertion loss (dB) Link power penalties (dB) Unallocated margin in link power budget (dB) 1000BaseSX 7.57 3.05 B1 unit interval peak-to-peak – 1.000 7.56 3.27 0.37 1000BaseLX 8.E3/DS3 Interface Specification Parameter Pulse Shape (nominally rectangle) Pair(s) in each direction Test load impedance Nominal peak voltage of a mark (pulse) Peak voltage of a space (no pulse) Nominal pulse width Value All marks of a valid signal must conform with the mask.57 0.95 to 1.0 5000 4.55 ns Ratio of the amplitudes of positive and negative pulses at the centre of the pulse 0.0 V 0 V+/.05 interval Ratio of the widths of positive and negative pulses at the nominal half amplitude Maximum peak-to-peak jitter at an output port 0.5 (multi-mode) 550 3.2 Tejas Networks Ltd.0.16 1000BaseLH 10.1 V 14.95 to 1. irrespective of the sign One coaxial pair 75 ohms resistive 1.5 0.5 10. 41 .5 B2 unit interval peak-to-peak – 0.8 2. 42 . OrderWire Telephone Function Network Management Function The Network Management System interface (NMS interface) provides a CSMA/CD based LAN transceiver for an Ethernet link through an RJ-45 connector on the MFC1 card. codec. Voice and signaling traffic is carried over E1 or E2 bytes of the SDH overhead. The TJ1500 can operate at a voltage range of -40 V to -60 V DC variations. CSA 60825-1. supervision. over voltage. EMI Safety Specification The equipment is compliant to EMI Specifications EN55022 Class A. It has the full battery. Two-wire analog interface is handled by hardware using a ringing SLIC and codec. The nominal operating voltage is -48 V DC nominal. Power Supply and Power Consumption The Power consumption of a fully loaded configuration is 600 W. Card MFC1 XCC02 XCC03 TET63 TE33 A012 A018 A161 A162 Max. The line impedance can be set according to local conventions from the user interface. hybrid and test (BORSCHT) functions. EN 300 386 and safety specification CSA 60950.Equipment Performance This is an operations communication channel that directly supports a two-wire analog telephony. Power Consumption 8W 30 W 50 W 15 W 10 W 11 W 34 W 22 W 22 W Tejas Networks Ltd. ringing. Earth resistance: <5Ω. Operating Temperature: 10° to 75° C Relative Humidity: 10 to 90 %. and no dust in the atmosphere. non-condensing Packaging and Transportation The network element is covered with plastic film. A wooden case is used for its outside package. Environmental Requirements Working Environment Ground bearing: ≥600 kg/m2. No corrosive and solvent gas. train. The chassis dimensions are 354 mm x 482 mm x 300mm (H x W x D) respectively. Tejas Networks Ltd.A164T TP01 TR03 TR04 ELAN01 34 W 8W 15 W 15 W 35 W Mechanical Dimension The TJ1500 network element is designed for 19" ETSI compliant rack. drench and isolation are forbidden. ship and plane. 43 . Power supply: can provide steady voltage. The network element can be transported by long-distance bus. Collision. tumble. Temperature should be maintained at -25° to 60° C while transportation. The chassis measures 8 U. Its top. middle and bottom parts are wrapped in plastic foam to prevent shaking. no strong Electromagnetic field nearby. 44 .Tejas Networks Ltd. 63 45.1 2987.55 1969.45 1759.25 3623.70 30.90 64.46 17.75 136.50 57.11 47.16 44.23 MTBF (in Years) Appendix System Stability Specifications Tejas Networks Ltd.45 3748.16 26.6 3784.85 501.69 30.A Table gives the FITS and MTBF data for the cards present in the TJ1500 network element.65 1725.21 31.87 66. Card Power Supply Module (PSM) Multi-Function Card (MFC1) Cross-connect Card (XCC02) Cross-connect Card (XCC03) TET63 TE33 A012 A018 A161 A162 A164T TP01 TR03 TR04 ELAN01 Fan Tray Unit (FT16S) FITS 835.9 4996.05 6506.56 64.4 4285.3 227.64 22.55 38.95 2588 2400 1764. 45 .5 2498. B Acronym BITS BNC CSTP DCC DDF Diffserv EMS ENUT EOW EPL EPLAN EVPL EVPLAN IBC ITU-T LAG LCAS LED LTE MFC MSP MS-SPRing MSTP Expansion Building Integrated Timing Systems Bayonet Neill Concelman connector Common Spanning Tree Protocol Data Communication Channel Digital Distribution Frame Differentiated Services Element Management System Enhanced Non Pre-Emptible Unprotected Traffic Engineering Order Wire Ethernet Private Line Ethernet Private Local Area Network Ethernet Virtual Private Line Ethernet Virtual Private Local Area Network In-Band Communication Appendix Acronyms International Telecommunication Union-Telecommunication Standardization Sector Link Aggregation Link Capacity Adjustment Scheme Light Emitting Diode Line Terminating Equipment Multi-Function Card Multiplex Section Protection Multiplex Section-Shared Protection Multiple Spanning Tree Protocol Tejas Networks Ltd. 46 . 47 .NMS NOC PDH PDP QoS RSTP SD SF SDH SNC-I SNC-N SNCP TDM TMUX UDC VCAT VCG VLAN VLAN ID WTR Network Management System Network Operations Center Plesiochronous Digital Hierarchy Power Distribution Panel Quality of Service Rapid Spanning Tree Protocol Signal Deterioration Signal Failure Synchronous Digital Hierarchy Sub-Network Connection Protection – Inherent Monitoring Sub-Network Connection Protection – Non-Intrusive Monitoring Sub-Network Connection Protection Time Division Multiplexing Terminal Multiplexer User Data Channel Virtual Concatenation Virtual Concatenation Group Virtual Local Area Network Virtual Local Area Network Identifier Wait to Restore Time Tejas Networks Ltd. 48 .Tejas Networks Ltd. 3rd Phase Bangalore 560 078 India Tel: +91-80-4179 4600/700/800 Fax: +91-80-4121 4481 Mail: [email protected]. 1st Main Road J.com USA c/o Sandstone Capital 177 Milk Street. 1st Floor Boston.Tejas Networks Offices Head Office # 58. Nagar.com Tejas Networks Ltd. Shenton Way #28-09 DBS Building Tower Two Singapore .068809 Mail: Hsales-international@tejasnetworks. 49 . MA 02109 USA Mail: Hsales-international@tejasnetworks com Singapore 6.