Introduction to GEPON SystemL-2 Introduction to GEPON System (M/s Teracom) BRBRAITT, Jabalpur Page 1 Introduction to GEPON System 1.0 Introduction The GEPON system is new generation intelligent carrier-class EPON terminal equipment, launched by Fiber Home. The GEPON system’s functional positioning is as follows: Used together with remote end ONUs as office end OLTs of FTTX solutions. Supports broadband services, such as VoIP, TDM, IPTV, CATV and access to the internet. The GEPON (AN5116-06A) system’s market positioning is as follows: Carrier-class FTTX office end equipment with high density and high performance. Provides solutions of fixed network broadband access, mobile base station transmission, E-business in business buildings. The AN5116-06A’s position in the network is shown in Figure 1. Figure 1: The AN5116-06A’s position in the network As the above figure shows, the AN5116-06A is usually placed in the equipment room of residential community or central office. On the network side, the AN5116-06A provides GE or 10GE uplink port(s) for connecting to IP network, as well as STM-1 optical interface for connecting to SDH equipments. On subscriber side, the AN5116-06A provides subscribers with various services incorporated in a single fiber, such as data, VoIP, IPTV, CATV and TDM, via an ODN. Functions and Features 2.1 Interface Types The AN5116-06A offers a diverse range of physical interfaces, as shown in Figure 2. BRBRAITT, Jabalpur Page 2 GE electrical interface Provides GE Ethernet uplink electrical interface. Management interface FE interface interface / 10GE / GE interface E1 interface of EMS Supports out-band GUI administration Supports in-band GUI administration RJ-45 port (adopting RS. Jabalpur Enables collection of external environment variables that can be reported to the network management system Page 3 . STM-1 optical interface Provides connection to STM-1 optical interface of transmission equipment. User interface EPON optical interface Provides EPON subscriber interface. 232 interface protocol) Dry interface contact RJ-45 port BRBRAITT. Table 1: Interfaces of the AN5116-06A Equipment Class Type Function Uplink interface 10GE optical interface Provides 10GE Ethernet uplink optical interface. Uplink interface GE optical interface Provides GE Ethernet uplink optical interface. E1 electrical interface Provides connection to transmission equipment.Supports out-band local CLI administration.Introduction to GEPON System Figure1: The AN5116-06A physical interfaces The functions of the AN5116-06A’s interfaces are shown in Table 1. Possesses a high splitting ratio of 1:64.0 Powerful EPON Access Ability Supports EPON function defined in IEEE 802. Downstream rate: 1. it can provide relatively high bandwidth.25 Gbit/s and 2. 3.Introduction to GEPON System Class Type External interface clock Clock coaxial interface Alarming interface 3. and fully meet current and future communication requirements of rural subscribers.3-2005 standard.25 Gbit/s. Application Areas Supporting triple-play The FTTX system adopts WDM technology to incorporate CATV signals and subscribers’ data and voice service. TDM signal of mobile base station can be uplinked to transmission equipment to achieve TDM emulation function. Used to transport alarm signals of sub-rack to PDP. transmitting through a single fiber by placing a passive optical multiplexer outside the AN5116-06A. when 3. The AN5116-06A provides two kinds of TDM interface cards that provide E1 electrical interface and STM-1 optical uplink interface respectively. which improves capacity. 4. conserves fiber consumption. Provides EPON transmission with large bandwidth capacity: Upstream rate: 1. adapt to the access condition of densely populated areas.5 Gbit/s. 3. When it is used together with AN5006-06A-A or AN5006-20 (equipped with TDM card).5 Supporting mobile base station traffic transmission. and facilitates network reach BRBRAITT. ensure access of voice and data services. to achieve Triple-play function.1 RJ-45 port Function Provides input and output of E1 external clock and BITS clock. 3.4 Supports delivery of broadband services to both rural and urban neighborhoods When the AN5116-06A is used together with AN5006-20. Jabalpur Page 4 .0 3.2 Supporting FTTH The AN5116-06A supports Fiber To The Home (FTTH) to deliver high-band service to subscribers’ houses.3 Supports refurbishment of antiquated copper plant The AN5116-06A can guarantee access of voice and data services by introducing optical feeds to the existent copper LAN network via FTTB. Supports management and identification of subscribers and program sources based on multicast VLAN. cassette MDU (including LAN type and XDSL type).248. auto or manual reset of preview authority and total preview time. The maximum transmission distance (PON+ twisted pair cable) can be more than 20 km. management and operation. the long-distance coverage problem of twisted pair cable access technology is solved. shelf-based MDU and HGU ONU. Supports IGMP Proxy protocol and IGMP Snooping protocols. Supports extended OAM function. Call control is achieved by a soft-switch or IMS which provides VoIP access for analog subscribers. 4.1 Multicast Functions The AN5116-06A features a point-to-multipoint PON network structure. new value-added service can be easily supplied to subscribers. and supports multicast protocol. Supports pre-join function which enables joining pre-configured multicast group by automatically send joining message upstream. Supports fast leave function. MGCP and SIP to achieve NGN voice functions. Supports multicast cascade. Support cross-VLAN multicast. MGCP and SIP protocols to a softswitch to achieve NGN services.2 NGN Voice Functions The AN5116-06A supports using ITU-T H. remote education and real-time video meeting. meeting the requirements of carrier-class speech quality. the minimum bandwidth allocation granularity of the DBA is in steps of 4 kbit/s. including 5 preview parameters: maximum time for a single preview. 4. By adopting PON technology. the accuracy of the DBA is better than ±5％. Supports various kinds of ONU. such as SFU.Introduction to GEPON System Supports DBA algorithm: The minimum configurable bandwidth of the DBA is no more than 256 kbit/s. network radio. Supports long-distance transmission. such as live online. It uses the ONU to access voice services and uses standard speech encoding technology to convert voice signals into digital signals which are then transported to an IP network in IP packets via the OLT. Jabalpur Page 5 .1 Realization of NGN voice service Supports ITU-T H. remote medical care. preview interval.248. Supports IGMP V2 / V3 protocol. network TV. Each sub-rack supports up to 4k concurrent multicast groups. Using multicast. 4. BRBRAITT. preview count allowed. Supports preview function.2. BRBRAITT. Alarm clock service. Transparent transportation of MoIP. VLAN of each voice channel supports IEEE 802. Percent of call completed is larger than 99. delivers them to CE1B / C155A card for protocol translation and transforms them into E1 or STM-1 format to continue upstream to the SDH network.2 NGN voice functions Provides 112 testing.2.30 / T.999%.1q and PRI setting.3 Supplementary services. Immediate hotline. The AN5116-06A has a CES protocol processor built in to translate between TDM format and Ethernet packet format. intelligent services and user-defined services assisted by the soft switch are: Calling number identification (CNID) presentation and restriction. T. and after they are processed by core switching card.3 NGN voice services IP phone access for POTS subscribers. TDM Emulation Functions The AN5116-06A provides E1 circuit emulation based on RFC 5086 (CESoPSN). 4. Jabalpur Page 6 . Call processing capability is 25k BHCA. Outgoing call blocking. Upstream direction: accesses Ethernet packets from the ONU side via EPON / GPON service card.38-based FoIP. Call forwarding (unconditional. Three party service. 4. IP CENTERX service.Introduction to GEPON System Supports SIP protocol to an IMS to achieve NGN services. busy and no answer).2. Supports multi-MGC list. Supports Q-in-Q encapsulation for voice services. Call waiting. Distinctive ring. 4. Pulse accounting and polarity-reversal accounting. The AN5116-06A is equipped with CE1B card and C155A card which respectively provides E1 electrical interface and STM-1 optical interface for uplink connection. e. the number of VLAN is increased to 4096×4096 on the basis of existing VLANs. i. Ethernet type. TDM emulation functions supported by the AN5116-06A are as follows: Supports two uplink interfaces: STM-1 interface and E1 interface. the user’s VLAN and the service provider VLAN are independent of each other. Its core concept is to encapsulate the VLAN tag of user’s private network in a VLAN tag of public network so that the user’s traffic crosses the provider’s backbone network with two layers of tagging. and is based on IEEE802. Thus multiple TDM services like mobile base station backhauling and E1 private line can be realized. time-to-live. Jabalpur Page 7 .. protocol type. L1 CoS.4 Q-in-Q VLAN / VLAN Stacking Functions VLAN. Supports selective Q-in-Q for one port. is an end-to-end logic network built by network management software which could go across different network segments and networks based on switching LAN. PON port. 4.1q. destination MAC address. This achieves transparent VLAN tag transport. L4 destination port No. effectively solving VLAN ID addressing space limit of 4k addresses. inner VLAN ID.1ad adds VLAN stacking. ONU. This can reduce carriers’ maintenance workload and protect convergence layer network and core network. source IP address. The basic VLAN standard is IEEE802. Supports network management selection of the clock type: clock extracted from E1 line and clock input on external clock interface of TDM card. Q-in-Q VLAN functions supported by the AN5116-06A are as follows: Supports VLAN number extension: by adding Q-in-Q VLAN. L4 source port No. some services use stacked VLANs. whereas other services still use single VLAN. also called Q-in-Q VLAN. Supports selected Q-in-Q: the system can add inner. outer VLAN based on the value of source MAC address. 4. Supports asynchronous clock mode and synchronous clock mode. IEEE802. outer VLAN ID. destination IP address. Supports TDM service using CESoPSN.1q. also named virtual LAN. The VLAN translation function provided by the AN5116-06A can be in one of the following three forms: BRBRAITT..e. There are four clock types to be chosen via network management system.5 Flexible VLAN Translation Function VLAN translation means access layer equipments transform VLAN tags labeled by users into unique network-side VLAN tags. which provides users with a relatively simple double-layer VPN tunnel.Introduction to GEPON System Downstream direction: the CE1B / C155A card transforms of E1 / STM-1 TDM traffic from the SDH network into Ethernet packets and distributes these to the ONUs. which then restores the original E1 TDM traffic flow. Supports subscriber and service differentiation through VLANs. i. L2 CoS. Supports setting subscriber’s S-VLAN based on card. service type. 2.g. When uplink interfaces are set to Trunk. the other system could take over its entire traffic to ensure traffic remains unblocked. the flow of this interface is automatically shared between other interfaces of this Trunk group. When one system of the two is found to be in failure. the configuration of upstream interface does not need to be changed. 4. 4. which greatly facilitates the user’s maintenance and management operations. if HU1A is used as uplink card. forming inter-system backup method and achieving load sharing.…. Hybrid translation: supports hybrid use of 1:1 VLAN translation and N: 1 VLAN convergence. i. A Trunk group of two 10GE uplink interfaces can be provided too. to make seamless switching. and remaps it into corresponding multiple VLANs in the downstream direction. If HU2A is used as uplink card.8 PON chip-level protection Supports arbitrarily designating a PON MAC chip to be 1:1 protected. the equipment can provide maximally 4 GE uplink interfaces and one 10GE uplink interface. two interfaces of uplink card are one-to-one protected. Under this mode. Power supply protection BRBRAITT. It can control the switching of the PON MAC chip when a Loss of Signal is detected on the optical module by hardware.e.6 Card protection function Supports 1:1 active / standby switching function of core switching card. If GU6F is used as uplink card. the bandwidth of uplink interface can be extended and load equalization is finished automatically. N) into a unique network-side VLAN ID. After switching of core card. the equipment can provide maximally 2 GE uplink interfaces and two 10GE uplink interfaces. Jabalpur Page 8 .7 4. When the uplink interfaces are set to dual-homing protection. the equipment can provides maximally 6 GE uplink interfaces. 12 GE uplink interfaces could form maximally 6 Trunk groups and each Trunk group could supports maximally 12 member interfaces. N:1 translation: VLAN convergence function. Supports 1+1 active / standby protection function of uplink interface card. Once an interface of Trunk group fails. Trunk protection and dual-homing protection of uplink interface: When uplink card is set to be 1+1 active / standby protection. Supports inter-card protection of the TDM card: the TDM card can be configured to function independently or support 1:1 protection. converges a number of upstream VLANs (e. two uplink card interfaces are connected to two diversely routed optical facilities. VLAN translation of upstream and downstream data traffic is done only by translation of the VID value.Introduction to GEPON System 1:1 translation: non-convergence. VLAN 1. There are indicators on the fan units which indicate the fan running status and the fan speed is adjusted automatically. achieving easy maintenance.Introduction to GEPON System 4. BRBRAITT.0 Networking Introduction The AN5116-06A is suitable for FTTH / FTTB application. Jabalpur Page 9 . Usually. 5. Any fault in one card doesn’t influence other cards. This greatly improves equipment reliability and stability. The power supply cards support a distributed power-fed mode and all powered cards are fed with power independently. The three fans are installed independently. Fan protection The system uses fans for cooling. The AN5116-06A’s networking sketch map is shown in figure 3. it is placed in central office.9 Two power supply cards work in dual-power input and protect against reverse polarity connection. Meantime. BRBRAITT.0 Application as per Technologies 6.1 Application to Q-in-Q VLAN The AN5116-06A supports Q-in-Q VLAN function. the VLAN number can be extended and thus the VLAN resource bottleneck can be removed. Jabalpur Page 10 .Introduction to GEPON System Figure 3: The AN5116-06A networking 6. By setting Service-VLAN on the basis of Customer-VLAN. subscriber separation and unique identifier can be realized by Customer-VLAN and service distinguishing can be realized by Service-VLAN. When various service flow of subscriber side goes through terminal equipments supporting 802. When Q-in-Q VLAN is added. two subscribers’ data and voice services are labeled with Customer-VLAN tag via ONU. 6. The Service-VLAN tags of data and voice services are 1 and 2 respectively. if the VIDs of Service-VLAN tag messages of the services are not consistent with the VIDs configured.2 Application to VLAN Translation VLAN translation is also named VLAN mapping. When two subscribers’ services are uploaded to the AN5116-06A via ONU. or else it discard the messages. they are labeled with Service-VLAN tags according to the different types of data and voice services. it strips Customer-VLAN tags and transport the service packets to subscribers. and Customer-VLAN tags for those accessed by ONU2 are 1002 and 2002. the Service-VLAN tag will be stripped directly and forwarded to the ONU of downlink equipment. Customer-VLAN tags for data and voice services accessed by ONU1 are respectively 1001 and 2001.1q (take HG as the example through the BRBRAITT. If yes. Jabalpur Page 11 . When those successfully configured subscriber services with Q-in-Q encapsulation are downlinked from upper network to the AN5116-06A. if the VIDs of Service-VLAN tag messages of the services are not consistent with the VIDs configured. Figure 4: The AN5116-06A application to Q-in-Q VLAN On subscriber side of the AN5116-06A. those subscriber services with double VLAN encapsulation are uploaded to upper network.Introduction to GEPON System The networking figure for the AN5116-06A application to Q-in-Q VLAN is shown in Figure . In the same way. the messages will be discarded. the equipment judges on the ONU the consistency between the VIDs of Service-VLAN tag messages of the services and the VIDs configured. and 300. for the tags labeled by HG could be out of the valid range defined by operators. Then the VLAN translation is finished. and are performed with 1:1 VLAN translation on ONU. BRBRAITT. those subscriber services with double VLAN encapsulation are uplinked to upper network. N:1 VLAN translation can converges several VLAN into one valid VLAN. they are labeled with Service-VLAN tags which are 3000 on the AN5116-06A. the ONU will strip the default tags labeled by HG and label valid tags when services are uplinked to the ONU. The performance of VLAN translation can achieve distinguishing of subscriber services on network side and reduce maintenance work and overhead of VLAN resource because only one SVLAN is needed for a system. When the labeling of Qin-Q VLAN is finished. When the services are uplinked to the AN5116-06A. supposing HG label subscriber services with fixed tags.Introduction to GEPON System whole document). subscribers’ data. and 700 respectively. Jabalpur Page 12 . voice and multicast services are 500. 200. Figure 5: 1:1 VLAN translation On subscriber side of the AN5116-06A. the Customer-VLAN tags of data. When subscribers’ services are uplinked to ONU. VLAN translation includes two types of translation which are 1:1 VLAN translation and N:1 VLAN translation. and multicast services go through gateways and are labeled with different default VLAN tags respectively which are 100. voice. 600. voice. Figure 7: VLAN translation hybrid mode Hybrid mode is consisted of 1:1 VLAN translation and N:1 VLAN translation. Jabalpur Page 13 . On subscriber side of the AN5116-06A. subscribers’ data. When subscribers’ services are uplinked to ONU. 200. and 300. the Customer-VLAN tags of all subscriber services are 500. and 300.Introduction to GEPON System Figure 6: N:1 VLAN translation On subscriber side of the AN5116-06A. and performed with N:1 VLAN translation on ONU. and multicast services go through gateways and are labeled with different default VLAN tags respectively which are 100. 200. When the labeling of Q-in-Q VLAN is finished. The performance of VLAN translation can achieve distinguishing of subscriber services on network side and reduce maintenance work and overhead of VLAN resource because only one SVLAN is needed for a system. and performed with 1:1 VLAN translation and N:1 VLAN translation on ONU. When subscribers’ services are uplinked to ONU. they are labeled with Service-VLAN tags which are 3000 on the AN5116-06A. and multicast services go through gateways and are labeled with different default VLAN tags respectively which are 100. voice. When the services are uplinked to the AN5116-06A. those subscriber services with double VLAN encapsulation are uplinked to upper network. subscribers’ data. the Customer-VLAN tags of data and multicast services are BRBRAITT. are becoming an important constituent part of information transmission. It will occupy lots of network resource. OLT will send an IGMP joining BRBRAITT. it captures this message and performs authorization. If point-to-point unicast mode is used. Figure 8: The AN5116-06A application to multicast service The AN5116-06A supports IGMP Proxy / Snooping. those subscriber services with double VLAN encapsulation are uplinked to upper network. When the labeling of Q-in-Q VLAN is finished. and the Customer-VLAN tags of voice service are 600. Therefore. yet not all hosts need this message. Although IP broadcast allows one host to send one IP message to all hosts in the same network. Jabalpur Page 14 . point-to-point unicast is not suitable for them because of their transmission feature which is point-to-multipoint. 6. When OLT receives IGMP join message sent by a certain subscriber.3 Application to IPTV Service On Internet. If the multicast group to join doesn’t exist in the multicast forward table of OLT. The AN5116-06A transmits multicast service in SCB+IGMP mode. It allows one host to send one copy of a multicast frame to multiple dedicated receivers. much network resource is wasted. and performs multicast service control and management via multicast control message. See figure 8 for the AN5116-06A application to multicast service. However. The AN5116-06A works in IGMP Proxy mode and ONU works in IGMP Snooping mode. video meeting and digital TV. When the services are uplinked to the AN5116-06A. such multimedia services as stream media.Introduction to GEPON System 500. Multicast technology is born under such a circumstance. they are labeled with Service-VLAN tags which are 3000 on the AN5116-06A. servers must provide each receiver with an IP message duplicate copy and the same messages will be repeatedly transmitted in the network. the signals are amplified and split to different BRBRAITT. And the operators cannot charge subscribers.Introduction to GEPON System request to multicast server and create this group in its table. Jabalpur Page 15 . and its soft-switch interface is perfectly connected to MGC gateways produced by various mainstream manufacturers. illegal multicast sources. The call control is realized by soft-switch equipments. To solve these problems. and illegal receivers. perform compression encoding to voice signals via speech compression algorithm to achieve analog-digital translation. the AN5116-06A controls and manages the access of subscriber multicast service. multicast messages will be broadcast to all EPON interfaces and all ONUs. Users can choose to disable the AN5116-06A’s IGMP Proxy function. if the group has already existed in its table. According to the density of CATV signal source. The AN5116-06A supports MGCP. illegal rebroadcasting. and performs subscriber multicast information recording and statistics. Because IGMP Proxy / Snooping doesn’t include subscriber authentication. In this case.248 and SIP.4 Application to VoIP Service The AN5116-06A supports VoIP function. so as to guarantee operators’ benefits. H. This could effectively prevent protocol attack. 6.5 Application to CATV Service The CATV signal source produces CATV signals independent of the AN5116-06A. OLT will directly add the subscriber to its table and set correspondence relationship between multicast service and the subscriber. See figure 9 for the AN5116-06A application to VoIP voice service. Then transform voice data in packet to IP network in real time via OLT. subscribers can join or leave a multicast group at will. these IP data are restored to original voice signals through corresponding decoding and decompression. After the voice service is accessed. and controls and manages multicast program sources. Figure 9: The AN5116-06A application to NGN voice service 6. At meantime when the receiving end receives IP data. First connect a plain telephone to RJ-11 port of an ONU. The AN5116-06A also supports controllable multicast function. data. MDU ONU can be further subdivided into types such as LAN. Then CATV signals are demultiplexed by demultiplexer on remote end ONU. They occupy an important position in operators’ competition.Introduction to GEPON System paths at transmission end and then incorporated with the AN5116-06A’s EPON signals in a single fiber for transmission by adding a multiplexer outside using WDM theory.1 Application to Business Buildings Users in business buildings have relatively higher ARPU (Average Revenue Per User) and more concentrated locations. Voice service access: plain old telephone service based. 3. also via some intelligent terminals (with Ethernet interfaces). Figure 10: The AN5116-06A application to CATV service 7. 2. It can provide users with the following services. See figure 11 for more information about application to business buildings networking. Private line service access: TDM based E1 private line access. the AN5116-06A can connect SBU (Single Business Unit) ONU and MDU ONU. BRBRAITT. the AN5116-06A is the best choice for business building users. See figure 10 for the AN5116-06A application to CATV service. Jabalpur Page 16 . Video service access: coaxial cable interface based CATV service or Ethernet interface based IPTV service. 1. Users can connect TV set to RF interface of ONU to get accessed to CATV service. Broadband data access: Ethernet interface based.0 Application to Situations 7. TDM service and video service. In the application to business buildings. xDSL and card types. 4. Incorporating voice. Introduction to GEPON System Figure 11: The AN5116-06A application to business buildings As shown in above figure. AN5006-07 / 09 / 10 is recommended as ONU for LAN MDU. Jabalpur Page 17 . transmit. 7. it is recommended to adopt LAN. real-timely and effectively. AN5006-04 is recommended as ONU. And if TDM private line service is needed additionally. or shelfbased MDU to upgrade current network or equipments to save costs. more and more families can obtain information BRBRAITT.2 Application to Intelligent Residence Communities Intelligent residence communities use modern information network technologies to construct a broadband information service access platform. AN5006-20 is recommended as ONU for shelf-based MDU. xDSL. For those business buildings that have already built a LAN or telephone line network. AN5006-06A-A or AN5006-20 (equipped with TDM card) is recommended as ONU and at the meantime the AN5116-06A also need to be equipped with TDM card. collect and monitor all kinds of information completely. This platform can receive. it is recommended that Fiber to the Office (FTTO) is adopted in newly-built business buildings. With EPON application to intelligent residence communities. If users only need data or telephone service. Currently. It satisfies the requirement to obtain high-rate Internet private line service and voice service through a single BRBRAITT.Introduction to GEPON System via broadband access network. public service and property management service. Figure 12: The AN5116-06A application to intelligent residence communities To meet the intelligent residence requirements on door-entry control. xDSL or shelf-based MDU for networking to save costs. ONU can be placed in the aisles or in the equipment room. building interphone. See figure 12 for the AN5116-06A application to intelligent residence communities in FTTH mode. fire fighting. residence house automation. room temperature. fee charging and automatic accounting of three meters (i. it will instantly report to network management system to remind users. That is to adopt LAN. water. fiber access becomes the first choice for most Internet bars.e. as well as excellent OAM features. Jabalpur Page 18 . The information service is diversified. Internet bars usually spread around. such as remote meter reading. so as to meet users’ integrated service requirements. the information services mainly include family information service. based on high-rate Internet private line access. When a dry contact interface detects environment alarms. kilowatt hour and gas meters). public facilities management. AN5006 / AN5506-07 / 09 / 10 is recommended as ONU for LAN MDU. plus some possible voice service. and the service types are simple. With data and voice access. AN5006-20 is recommended as ONU for shelf-based MDU. 7. 20 Mbit/s and 100 Mbit/s. public broadcast. the AN5116-06A fully meets the requirements of “one network. Therefore. becoming more and more comprehensive and layered. For old communities or the communities not supporting FTTH. ONUs used together with the AN5116-06A provide dry contact interfaces connecting external monitoring equipments. They require a network system with strong covering capability. supply voltage and smoke alarms. exit and entry control. All these services are accessed to property management servers by the AN5116-06A and performed by service providers of the property company. the access rates are typically 10 Mbit/s. resident archives management.3 Application to Internet Bars In Internet bars. Newly built residence communities can use FTTH mode. two bars” (Internet bar + phone bar). as well as the interconnection with broadcast system. Jabalpur Page 19 .Introduction to GEPON System fiber. See Figure for the AN5116-06A application to Internet bars. Besides. The video signals from video recorders to monitoring center need 1Mbit/s or more bandwidth. in case of information processing and application afterwards. longer distance transmission and line resource saving are required. If EPON system is used to access digital monitoring service. Furthermore. when there is an alarm. traffic management and emergency management requirements. multiple Internet bars’ services are accessed into the AN5116-06A via a splitter. because of the access of alarm-reporting supervision system. ONU is placed in the monitor point. During the safety city construction. The AN5116-06A is placed in supervision center room and connected to network matrix host in supervision center via uplink interface. Because lots of digital video recorders are spread around the city. Each Internet bar is equipped with one ONU. city management. but also meets video monitor requirements of disastrous accident early warning and safety production. Figure 13: The AN5116-06A application to Internet bars As shown in the above figure. As shown in the figure. It not only meets public security management. It views the uplinked images in real time and meanwhile performs video recording 24 hours a day. which keeps data information for functional departments for city management. it takes into account the integration of alarmreporting and door-entry control system. 7. “digital monitoring” is a key factor. Each ONU executes data and voice service access for Internet bar. the encoder and hard-disk video recorder are connected to ONU via Ethernet interface and they perform compression encoding to the collected real-time images which is then uplinked to the AN5116-06A. See Figure for the AN5116-06A application to city security monitoring project. the above requirements can be well satisfied. and performs uniform management by the same network platform. the corresponding alarm information will be transported to alarm-reporting command centers of BRBRAITT.4 Application to City Security Monitoring Project City security monitoring project is a huge and comprehensive management system. BRBRAITT. Jabalpur Page 20 . It sends both video and voice signals from each monitor point to the monitor center. Figure 14: The AN5116-06A application to city security monitoring project This solution not only supports digital monitor and control. so as to safeguard public security. AN5506-03 is recommended as ONU to support the AN5116-06A’s application to city security monitoring project. but also provides voice service.Introduction to GEPON System different levels to make sure police gets incident information at first time. It facilitates real-time communication with public security and fire fighting departments in case of emergency.