4. l The MGC is the call control and media resource part of the UAP8100, and is the crucial part.
It is developed based on two platforms:
p Hardware platform: Huawei Open Standards Telecom Architecture (OSTA) platform
p Software platform: Distributed Object-oriented Programmable Realtime Architecture
(DOPRA) platform
l The MGC 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,
among others.
p Supports packet protocols such as H.248, SIGTRAN, and SIP as required by NGN.

5. l UAP is composed of two parts: MGC and MGW
l The MGC is the call control and media resource part of the UAP8100, and is the crucial part. The
MGC 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, among
others.
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.

7. l MGC cabinet type:N610-22
p Width:600mm
p Depth:1000mm
p Height:2200mm
p The available space in the cabinet is 46U, while 1U = 44.45mm = 1.75 inch.
l 4 Frames in a MGC cabinet.

8. l Frame type: OSTA
p Width: 19 inches
p Height : 9U
p 21 standard board slots

9. l The SIU provides a 5-bit DIP switch S3, used for setting unit frame IDs.
l SIU : Board of MGC system, will introduce later.

10. l Setting unit Device Number
l When we install more than one UAP-MGC in the same network. This determines the device
number for avoiding the conflict.

11. l The DIP switch on the SIU determines the frame number. The SMU reads the DIP switch on
the SIU and retrieves frame number. For the relationship between the DIP-switch settings of
the SIU and the frame number, refer to chapter 3 “Boards” for details.
l Depending on different board types configured, UAP8100 MGC frames fall into three types:
p Basic frame
p Expansion frame
p Resource frame

12. l Basic frame must be configured in the integrated configuration cabinet. The basic frame
provides a number of external interfaces such as clock, E1, and IP.
l A basic frame can provide all service processing capabilities.

13. l The expansion frame is optional, and can be configured as service processing frames
depending on the subscriber capacity.
l Expansion frames cannot exist by itself. They must cooperate with the basic frame to
provide service processing functions.

15. l This frame can be configured with the resource boards including the VRB and MSU. It
provides the resources for the external devices.

17. l For different boards, the backup mode differs. Some boards can only adopt the master and
slave mode; some only the load sharing mode; and others either. Note that only one mode
can be adopted at one time.
l To work in the master and slave backup mode, two boards need to be inserted in paired slots.
and system description is ONEBACKUP.
l To work in the load sharing mode, system description is LOADSHARE.

19. l SMU enables the following functions:
p Configuring shared resource buses and managing their status.
p Managing all boards in the frame, reporting their status to BAM and controlling the
status of the indicators on the front panel of the ALU through serial port bus and
shared resource bus.
p Loading and managing system program and data.
l SMU work in active/standby mode.
l DOMA :Bus domain indicator .When the indicator lights, it indicates that the SMU in domain
A controls the shared resource buses.

20. l The System Interface Unit (SIU) is the back-insert interface board of the SMU, and the SIUs are
installed in back slots 6 and 8 of the frame. Its functions are as follows.
p Providing the SMU with Ethernet interface. The SIU is configured correspondingly to the
SMU one by one.
p Implementing level conversion for two asynchronous serial port signals from the front
board, and providing physical interfaces for three asynchronous serial ports.
p Identifying frame ID through setting the DIP switches.
l The SIUs work in active/standby mode.

21. l The Hot-Swap and Control Unit (HSC) is a back board. One pair of HSCs is installed in the back
slots 7 and 9 in each frame. It provides the following functions:
p Bridging between left and right shared resource buses, to ensure that the SMUs in slots
6 and 8 can manage the front boards (except ALU and UPWR) of the frame.
p Switching of Ethernet buses in the frame.
p Board hot swap control.
p Board power-on control.
p Providing two pairs of heartbeat detection interfaces for the SMU and HSC.
p Providing a 10/100 Mbit/s auto-sensing Ethernet connection between the active and
the standby SMU.
p Providing six external FE interfaces. And the HSC1 still provides one pair of GE interface.
l The HSCs work in active/standby mode.
l The difference between the HSC0 and HSC1 is that the latter provides one pair of GE interface.
The former is used in the basic frame and expansion frame. The latter is used in the resource
frame and provides the GE interface to connect to the core LAN Switch.

22. l The Alarm Unit (ALU) is a front board and installed in slot 16 in each frame. It provides the
following functions:
p Communicating with the SMU through the serial cable, and accepting the
instructions and commands from the SMU to control indicators.
p Checking the chassis temperature and reporting the related information to the SMU
through the serial port cable.
p Collecting fault detection signals and in-position signals of four power modules,
reporting the logically synthesized signals as the working status of the power system
to the SMU through the serial port cable, and displaying power board working and
in-position status by its indicators.
p Reporting error information and lighting the fault indicator when the temperature
sensor is faulty.

23. l The ALU collects the information of the UPWR through the serial cable embedded in the
backplane, and drives the indicators on the ALU to indicate the working status of the
UPWR.
l The UPWR adopts the 2+2 backup working mode.

24. l As the front board, the Fixed Calling Control and Signaling process Unit (CSU) is used together
with the back board EPI in pairs. The CSU enables the following functions.
l The CSU implements processing of call control and protocols, such as MTP3, ISUP, H.248 and
SIP. The CSU also forwards the M3UA messages.
l The difference between the CCU and the CSU is that the CSU can process narrowband
signalingMTP2 messages while the CCU cannot.

25. l It codes and distributes the CSTA ROSE messages. In addition, it forwards messages of M3UA.
l The difference between the CCU and the CSU is that the CSU can process narrowband
signalingMTP2 messages while the CCU cannot.

26. l The IP Forward Module (IFM) boards are the front boards in basic frame 0 and basic frame 1,
and used together with the back board BFI in pairs. The IFM is used to receive and transmit IP
packets, process Media Access Control (MAC) layer messages, distribute IP messages and
provide IP interfaces together with the BFI.
l The alarm information generated by the IFM is reported to the SMU through the shared
resource bus.
l The IFMs work in active/standby mode.

27. l The Broadband Signaling Gateway (BSG) is used to process the IP packets after the IFM level-1
dispatch. It implements the following protocols:
p UDP
p SCTP
p M3UA
p H.248
l The alarm information generated by the BSG is reported to the SMU through the shared
resource bus.
l The BSGs work in load sharing mode.

28. l The Multimedia Signaling Gateway Unit (MSG) processes the following protocols:
p UDP
p TCP
p SIP
l The alarm information generated by the MSG is reported to the SMU through the shared
resource bus.
l The MSGs work in active/standby mode

29. l The Central Database Boards (CDBs) are the front board. As the database of the equipment,
the CDB stores all data of the following aspects:
p Call location
p Gateway resources management
p Outgoing trunk circuit selection
l The CDBs work in active/standby mode. At maximum, eight pairs of CDBs can be configured.
l The alarm information generated by the CDB is reported to the SMU through the shared
resource bus.

30. l The Voice Resource Board (VRB) is a narrowband media resource processing unit. It is the
front board, and used in pair with the back board ERI. Each VRB can function as independent
media resource server. The VRB processes the audio signals in real time. It collects and
generates DTMF signals, plays and records audio clips.
l The VRBs work in load sharing mode.

31. l The Media Resource Control Unit (MSU) is the front board in the resource expansion frame,
and used in pair with the back board MRI. Each MSU can function as independentmedia
resource server. The MSU processes the audio signals in real time. It collects and generates
DTMF signals, plays and records audio clips, plays video and provides multi-party
conference function.
l The MSUs work in load sharing mode.

32. l The EPI enables the following functions:
p Processing messages on MTP1 physical layer.
p Providing narrowband signaling physical interfaces for the CSU. The EPI is configured in
pair with CSU.
p Implementing transfer of system clock and enabling clock synchronization function in a
frame.
p Working with the front board CSU to perform switchover between active and standby
boards through H.110 bus.
l EPI work in active/standby mode.

33. l BFI work in active/standby mode.

35. l The Media Resource Interface Unit (MRI) is the back board of the MSU, providing 10/100-
Mbit/s interface for the external media streams.
l On the MRI, there are two groups of interfaces, and each group has three interfaces: the
upper interface is the serial port for commissioning, the middle one is the 10/100 Mbit/s
network interface for stream transmission and the lower one is reserved for future use.

36. l The CKI enables the following functions:
p Providing the clock signals
p Supporting Synchronization Status Message (SSM) function
l CKI work in active/standby mode.

39. l Alarm path for front boards excluding ALU and UPWR:
p Alarm data through shared resource bus transmit to SMU
p SMU transmit it to BAM through serial bus
l Alarm path for back boards.
p Using serial bus ,boards transmit alarm messages

42. l The shared resource bus enables SMUs to load, manage and maintain all loadable boards
in the same frame, such as the IFM, BSG, CCU, CSU, CDB and MSG.
l There are two shared resource buses, namely A and B, in one frame. The bandwidth of
each shared resource bus is 2G bit/s.
l The states and resources of shared resource buses are arbitrated and managed by the
SMU.
l The SMU in the slot 6 manages the front boards in the left half of the frame through the
shared resource bus A.
l The SMU in the slot 8 manages other front boards except ALU and UPWR in the right half
of the frame through the shared resource bus B.
l The HSCs in the slots 7 and 9 are connected to the shared resource buses through the
internal PCI bus, and thus the shared resource buses are interconnected.
l Therefore, the SMU in the slot 6 makes full use of the HSC in the slot 9 and the shared
resource bus B to manage front boards in the right half of the frame.
l The SMU in the slot 8 makes full use of the HSC in the slot 7 and the shared resource bus
A to manage front boards in the left half of the frame.

43. l The CSU, CCU, BSG, MSG, IFM, SMU, and CDB in the OSTA frames act as the channel of
inter-board service through the Ethernet bus. It ensure that the system processing flows
are uniform and smooth.
l There are 2 Ethernet buses, namely A and B, in one frame. The bandwidth of each
Ethernet bus is 100 Mbit/s.
l Each Ethernet bus is connected to the HSCs in the slots 7 and 9.

44. l There is one H.110 bus in one frame. The bus provides a switching capability of 4096 time
slots. The H.110 bus provides the following functions:
p Service changeover between active and standby CSUs
p Transmission channel for reference clock signals inside the frame
l The H.110 bus can carry out the service backup function only when CSUs switch over.
Because E1 is invariably configured on EPIs, the EPI switchover will cause the interruption
of trunk circuits and interruption of signaling links.
l HW: Highway

45. l SMUs manage the boards that are not connected to a shared resource bus in a service
processing frame through the serial port bus.
l Applicable boards include CKIs, EPIs and ALUs. The baud rate of the serial port bus is 38.4
kbit/s.
l Slave nodes of master or slave serial ports also include monitor board of power distribution
box and fan box. The baud rate for the monitor board to communicate with the master
node (SMU) is 9600 bit/s.
l SMUs make use of the shared resource bus and related front boards to manage back
boards without a processor, such as SIUs, HSCs and EPIs.
l SMUs make use of the serial port bus, ALU and two serial port wires embedded in the
backplane to manage UPWRs.