1. l The MGW adopts a hybrid design of packet switching (PS) and narrowband switching. This willeffectively enable the MGW to support narrowband services based on TDM as well as packetservices based on IP. The service stream and control flow are processed by different packetswitching modules.

2. l UAP is composed of two parts: MGC and MGWl The MGC is the call control and media resource part of the UAP8100, and is the crucial part. TheMGC has the following functions:p Call control, service processing, and provide broadband and narrowband media resources.p Supports narrowband signaling such as TUP, ISUP, SCCP, TCAP, INAP, CAP, WIN, amongothers.p Supports packet protocols such as H.248, SIGTRAN, and SIP.l The MGW is the TDM switching centre of the UAP8100. It has a TDM switching capacity of 256K,supporting both TDM trunks and IP trunks. 3. l MGW shelf type:N610-22p Width:600mmp Depth:1000mmp Height:2200mml 3 frames per MGW shelf.l 9 frames of maximum No. 4. l There is a transfer board in the transfer box at the bottom of each MGW Frame. The frame IDshould be set with the DIP switches on the transfer board.p SW1 to SW4 are used to set frame ID in binary mode.p ON stands for 0 and OFF for 1.p SW5 to SW8 are not used, they must be set as OFF.l Frame ID= (SW4)(SW3)(SW2)(SW1). 5. l MGW frame is an independent unit installed with various boards. It is a standard frame, 19 incheswide and 12U high. Its backplane is installed in the central of the frame, and front and back boardsare inserted onto the backplane. One UAP8100 MGW frame provides 16 slots at both the frontand the back.l The UAP8100 MGW adopts UAP8100 MGW-256 Frames to provide 256 K TDM switching capacity. 6. l Main control frame: Manages and maintains the entire equipment and accesses and processesservices. 7. l Central switching frame: Provides multi-frame cascading function when there are more than twoframes. 8. l Service frame: Provides the service bearer processing function. 9. l Extended control frame: Provides connection management and control function only, there arenot any bearer service access or processing function. It is configured only in full configuration ofthe UAP8100 MGW. 10. l The main control frame must be configured. It is the maintenance and management centerof the whole UAP8100 MGW. The main control board is the OMU.l In the single-frame networking, service boards are configured in the main control frame toprovide service functions.l It connects directly with the TNU and NET in the central switching frame through its TCLUand NET to implement the cascading between frames.l NOTEl In the single-frame networking, the TCLU does not need to provide cascading functions.Therefore, no cascading boards are needed. In the case of future expansion, cascadingboards need to be configured first. 11. l The central switching frame must be configured in the networking of more than twoframes. It implements the multi-frame cascading function.l In the case of not more than nine frames, service boards can be configured in the centralswitching frame to provide some service processing functions.l It connects directly with the TCLU and NET in the main control frame through its TNU andNET. It connects directly with the TCLU and NET in service frames through its BLUs. Itconnects directly with the NETs in the control frame through its NETs.l NOTEl In the single-frame networking, a single frame serves as both the central switching frameand the main control frame. When one BLU cascades with one TCLU, the cascading portson the two boards should correspond to each other from top to bottom. That is, the Rxend of each cascading port must connect to the Tx end of the correspondinginterconnecting cascading port. 12. l The control frame only processes the gateway control H.248 messages. It is needed only inthe full configuration of nine frames. If service frames provide enough slots, the controlframe does not need to be configured.l It connects directly with the NETs in the central switching frame through its NETs to provideFE cascading channels between frames.l NOTEl There are only FE cascading channels between the control frame and the central switchingframe. Therefore, boards that process bearer services cannot be configured in the controlframe. 13. l For different boards, the backup mode is different. Some boards can only adopt themaster and slave mode; some only the load sharing mode; and others either. Note thatonly one mode can be adopted at one time.l Work in the master and slave backup mode, two boards need to be inserted in paired slots.and system description is ONEBACKUP.l Work in the load sharing mode, system description is LOADSHARE.l The following slots are paired slots of each other: slot 0 and slot 1, slot 2 and slot 3, slot 4and slot 5, slot 10 and slot 11, slot 12 and slot 13 and slot 14 and slot 15.l However, some boards whose positions are fixed do not need to be inserted in paired slotswhen adopting the master and slave mode. For example, the OMU, TNU, CLK and so onneed to be inserted in fixed slots. 14. l As the management and control center of the whole equipment, the OMU enables thefollowing functions:p Providing packet switching function at the control plane to communicate with all theboards with FE control interfaces in presence of a single frame and to exchangeinformation with other frames and manage interfaces in the multi-frame cascadingcase.p Monitoring and managing the states of all boards in the equipment.p Embedding a BAM, which provides MML and Telnet interfaces to configure andmaintain boards, and saves log files and alarm information.p Implementing state monitoring and power-on/off management on the equipmentthrough special MBus modules; avoiding attack from instant currents by controllingboard power-on sequence.p Interacting with the packet service board, the TDM service board, and the serviceresource board in the equipment; controlling various service resource and convertingbusiness bearer and business process format.l Working mode : Master/Slave. 15. l As the control core of a frame (switch frame and service frame), the MPU enables the followingfunctions:p Providing switching functions at the FE control plane to exchange control informationbetween all boards with FE control interfaces in the presence of a single frame, andexchange control information between frames and manage interfaces in the case ofmulti-frame cascading case.p Monitoring and managing board status in the frame.p Implementing state monitoring and power-on/off management on the equipmentthrough special MBus modules; avoiding attack from instant currents by controllingboard power-on sequence.p Interacting with the packet service board, the TDM service board and the serviceresource board in the equipment; controlling various service resource and convertingbusiness bearer and business process format.l Working mode : Master/Slave. 16. l The CMF enables the following functions:p Interworking with packet service boards, TDM service boards and service resourceboards to implement service bearers conversion and service stream formats conversion.p Connecting the FE control plane through the two FE interfaces on the backplane toperform command interaction, alarm report, signaling transfer and other managementand maintenance functions.p Interacting with the OMU/MPU through a dedicated maintenance module to monitorboard temperature, voltage and control power-on/off. 17. l The major functions are as follows.p Providing packet service switching channels in a frame to exchange service data between allpacket service boards in the frame.p Cascading two frames instead of cascading boards. The embedded cascading module in theNET enables interworking of 2 x GE service data planes and interworking of 2 x FE servicecontrol planes.p Providing service control and maintenance interfaces for the corresponding front boardssuch as the OMU and MPU to address back cabling requirements.p Receiving clock signals from the CLK, and sending them to TDM service processing boardsafter phase lock, signal driving and distributing.l Working mode : Master/Slave. 18. l FLU enables the following functions:p Providing one 8 k TDM data cascading channel for the BLU.p Providing one 1.25 G IP data cascading channel for the BLU.p Providing two 8 k TDM data cascading channels and two 1.25 G GE data cascadingchannels for the BLU by two FLU boards in load sharing mode.p Interacting with the MPU through a dedicated maintenance module to monitor boardtemperature, voltage and control power-on/off.l Working mode : Master/Slave. 19. l The BLU enables the following functions:p Providing three 8-kbit/s TDM or four 8-kbit/s TDM narrowband data channels todirectly connect frames through multi-mode optical fibers that are no more than 50m spaced.p Providing two 1.25 Gbit/s broadband packet data channels to directly connectframes through multi-mode optical fibers that are no more than 50 m spaced.p Providing one 100-M IP packet control data channels to directly connect framesthrough category-5 twisted pair or super category-5 twisted pair that are no morethan 50 m spaced.p Providing board management and maintenance by the dedicated MBus module ofthe board, communicating with the local MPU and reporting board status andversion to the local MPU through FE channels. 20. l In the two-frame cascading case, the TNU is connected with the TCLU in the other frameby three fibers. In the multi-frame cascading case, the TNU is connected with the TCLU ina service frame by three or four fibers provided by the BLU in the central switching frame.The TNU enables the following functions:p Setting up and releasing TDM time slots in cooperation with TDM service interfaceboards, and providing 8-k switching capacity for each interface board.p Connecting the TCLU in another frame through cascading boards or directly throughmulti-mode optical fibers, and providing 24-k or 32-k cascading capacity.p Implementing board management and maintenance through dedicated MBusmaintenance modules, and communicating with the MPU on board status andversion information through FE interfaces. 21. l The difference between the TNU and TCLU is that the TNU is controlled by the OMU toimplement the core switching function and to manage TDM resources for the whole equipment,while the TCLU is controlled by the TNU to handle TDM services and manipulate TDM bearerresources for the local frame.l Working mode : Master/Slave. 22. l The HRU enables the following functions:p Processing IP routes, converging and distributing IP services.p Monitoring and managing the states of the board and the corresponding back boards.p Providing debugging port to debug the board.p Through special maintenance module, querying status of the equipment, monitoringpower supply and temperature and controlling power on and off.l Working mode : Master/Slave. 23. l In general, the SPF enables the following functions:p Implementing signaling gateway functions, that is, adapting TDM signaling toIP type based on SIGTRAN and then forward IP signaling to the MGC.p Connecting the control plane though two FE interfaces on the backplane toperform command interaction, alarm and log report, signaling transfer andother management and maintenance functions.p Interacting with the OMU/MPU through a dedicated maintenance module toquery board status, monitor the power and temperature, and control power-on/off.l Working mode : Load sharing. 24. l VPB enables the following functions:p Supports functions such as announcement, digit collecting, and audio mixing.p Supports G.711A, G.711, G.723.1, G.726 and G.729 voice codec modes.p Receive the management of the OMU/MPU board through the MBus maintenancemoduleon the board to query the status of the board, monitor the power supply and temperatureand control the power on/off.l Working mode : Load sharing. 25. l Clock sources for the CLK include:p External synchronous clock signals provided by BITS.p Line clock signals extracted by TDM interface boards.p Synchronous clock signals of GPS/GLONASS.l Working mode : Master/Slave. 26. l The S2L provides two 155 Mbit/s SDH optical interfaces for bearing TDM services, which adoptswappable optical modules.l STM-1:SDH Transport Module -1l The S2L enables the following functions:p Extracting clock signals and forming frames at the two 155 M optical interfaces.p Processing overheads of regenerator section and multiplex section of optical signals andchecking communication over optical channels.p Implementing SDH mapping, de-mapping and processing overheads of high-order path andlow-order path.p Forming 2*63 E1/2*84 T1 frames and performing DS0 switch. 27. l The E32 enables the following functions:p Providing 32 E1 interfaces.p Providing 32 E1 frames.p Providing internal FE interfaces to receive management from the OMU/MPU.p Interacting with the OMU/MPU through a dedicated maintenance module to query thestatus of the board, monitor the power supply and temperature, and control power-on/off.l Working mode : Load sharing. 28. l The E8T, the back IP interface board, is used to provide 10/100 M Ethernet interfaces for IPservice boards. In the name E8T, "E" means that the board provides Ethernet interfaces, "8"means that each board provides eight interfaces, and "T" indicates that the Ethernet interface isconnected with twisted pair.l The E8T enables the following functions:p Providing eight 10/100Base-TX Ethernet interfaces in conformity with the IEEE802.3 andIEEE802.3u standardsp Providing the 1+1 backup function for the service processing boardl The E8T has a dedicated MBus maintenance module but no internal FE interfaces. Therefore,the OMU/MPU operates and manages the E8T through the front IP service board. 29. l he system buses include the MBus, GE, FE and TDM buses.p The MBus is the maintenance bus.p The GE and the TDM are the service bus.p The FE is the common bus for signal control and maintenance.l The connections between the boards and the buses are described as below.p All boards provide interfaces for the MBus bus.p The VPB, HRU, FLU, BLU, NET, MPU and OMU boards provide interfaces for the GEbus.p The VPB, FLU, BLU, TNU, constant current load unit (CLU), E32, T32 and S2L boardsprovide interfaces for the TDM bus.p The VPB, OMU, MPU, HRU, CMU, BLU, FLU, CLK, TNU, CLU, NET, E32, T32 and S2Lboards provide interfaces for the FE bus.p Some interface boards such as the E8T do not provide FE interfaces. They aremanaged through their corresponding front service boards.