Mecanismos de defensa .1 Barreras

In MGW system, MPX86 board implies the control unit for SMP and OMP. For UMTS, MPx86/2 board handles the protocols. MPx86/2 also performs system control, maintenance function and processing network management protocol.

In the MGW system, the MPX86/2 board can be used as two kinds of functional units: OMP board and SMP board.

The MPX86/2 board has powerful processing ability. Configured with 2G memory, the MPX86/2 board also provides many external interfaces such as IDE, 10/100M NIC, RS485, RS232, USB interfaces. The MPx86/2 board uses the standard PCI bus to connect with other peripheral equipments and supports MP active/standby switchover function. It has control register and data register to set the functions of the board through the main control software and exchange the working status data.

When the MPX86/2 board is used as the SMP board, it mainly implements bearer control functions and the processing of each kind of signaling. When the SGW is configured in the MGW, signaling conversion can be implements, such as interconnection between the SCN domain and the IP domain.

In the MGW system, the MPX86/2 board can be used as two kinds of functional units: OMP board and SMP board.

The MPX86/2 board has powerful processing ability. Configured with 2G memory, the MPX86/2 board also provides many external interfaces such as IDE, 10/100M NIC, RS485, RS232, USB interfaces. The MPx86/2 board uses the standard PCI bus to connect with other peripheral equipments and supports MP active/standby switchover function. It has control register and data register to set the functions of the board through the main control software and exchange the working status data.

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PrecautionsOverview Functions of

ZXWN MGW Media Gateway Hardware Description

When the MPX86/2 board is used as the OMP board, it mainly takes charge of the global process and implements the control functions (including the operation and maintenance agent) related with the operation and maintenance of the whole system. Connected with the OMC through the 100M Ethernet port, the OMP board implements the isolation between the internal network section and the external one. The OMP also acts as the operation and maintenance core of the MSCS, directly or indirectly monitoring and managing the boards in the system. MPx86/2 board consists of two sets of designed CPU systems such as CPU_A and CPU_B. These CPU systems are independent of each other. CPU_A is the primary control and manage boards. Besides CPU units, there are many other units such as power unit (supplies power for the whole board), control stream controller, media stream controller, OMC Ethernet controller, Master/Slave Ethernet controller, Power management 485 interface, GPS 485 interface and UIM communication 485 interface. Figure 48 shows working principles of MPx86/2 board.

FI G U R E 4 8 M PX8 6 /2 B O A R D WO R K I N G PR I N C I P L E

MPx86/2 board is used as SMP and OMP logical boards, based on requirements of GGSN system. Panels of SMP and OMP boards are shown in Figure 49.

Working

Chapter 3 MGW Boards

FI G U R E 4 9 PA N E L O F S M P A N D OM P B O A R D S

OMP SMP

USB1USB2USB1USB2 ENUM2RUN2 OMC1 HD1 HD2 OMC2 ACT2 EXCH2 ALM2 EXCH1 RST ENUM1 ACT1 ALM1 RUN1 ENUM2RUN2 ALM2 HD2 EXCH2 HD1 ACT2 RUN1 EXCH1 ALM1 RST ACT1 ENUM1

ZXWN MGW Media Gateway Hardware Description

Table 42 shows indicators of MPx86/2 board.

TA B L E 4 2 IN D I C A T O R S O F M PX8 6 /2 B O A R D

Indicator Color Indication Description

ALM_1 Red

Alarm indicator of CPU

subsystem A

On: Alarm exists on board Off: No alarm exists on board RUN_1 Green Run indicator of CPU subsystem A Flashing at 5Hz: indicates board is power on Flashing at 1Hz: indicates board is running normally Continuously flashing at 5Hz: indicates power failure on board ACT_1 Green Active/standb y indicator of CPU subsystem A

On: Board is active Off: Board is standby

ENUM_1 Yellow Board extraction indicator of CPU subsystem A

When board is located in the shelf, indicator is ON by default. During power on process, before the software startup, ENUM is ON. As soon as the software detects the spanner is closed, it will set ENUM to OFF. It means the system is running. If the board is pulled out, when the spanner is released, it will send an ENUM interrupt signal to CPU. Then CPU will switch to out-of-service status and set ENUM indicator to ON. Then the board is ready to be pulled out. (If the ENUM is OFF, the board cannot be pulled out, Otherwise it will affect the service) If the board is not pulled out and the spanner is closed again, the software will detect the spanner status and set the ENUM to OFF.

ALM_2 Red

Alarm indicator of the CPU

On: Alarm exists on board Off: No alarm exists on

Chapter 3 MGW Boards

Indicator Color Indication Description

ACT_2

Green Active/standb y indicator of the CPU subsystem B

On: board is active Off: board is standby

ENUM_2 Yellow Board extraction indicator of the CPU subsystem B

When the board is located in the shelf, indicator is ON by default. During the power on process, before the software startup, ENUM is ON. As soon as the software detect the spanner is closed, it will set ENUM to OFF. It means the system is running. If the board is pulled out, when the spanner is released, it will send an ENUM interrupt signal to CPU. Then CPU will switch to out-of-service status and set ENUM indicator to ON. Then the board is ready to be pulled out. (If the ENUM is OFF, the board cannot be pulled out, Otherwise it will affect the service) If the board is not pulled out and the spanner is closed again, software will detect the spanner status and set ENUM to OFF.

Table 43 shows list of buttons on MPx86/2 board.

TA B L E 4 3 BU T T O N S I N M PX8 6 /2 B O A R D

Button Name Description

EXCH1 Perform active/standby _{changeover of System A}

EXCH2 Perform active/standby

changeover of System B

RST Reset MPx86/2

Table 44 shows external interfaces of MPx86/2 board.

TA B L E 4 4 EX T E R N A L IN T E R F A C E S O F M PX8 6 / 2 B O A R D

Interface Purpose

2 OMC Ethernet interfaces of 100M

to peripheral. MPx86/2 as OMP

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Buttons External

ZXWN MGW Media Gateway Hardware Description

When MPx86 boards are used as SMP board, it will handle 2~4 Mbps signal stream.

When the MPx86/2 board is used as the SMP board, its corresponding backboard is an empty panel.

When the MPx86 board is used as the OMP board, its corresponding backboard is the RMPB board, as shown in Figure 50.

Technical

Chapter 3 MGW Boards FI G U R E 5 0 R M P B BO A R D RMPB PD485 DEBUG1-232 DEBUG2-232 RS232 GPS485 OMC2 OMC1

The external interfaces on the RMPB board are described as below:

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Interface Description

ZXWN MGW Media Gateway Hardware Description

 OMC1 and OMC2 (FE interface): used to connect with the

maintenance system of the background.

 DEBUG1-232 and DEBUG2-232 (RJ45 interface): used for

test and providing no service function.

 PD486 (RJ45 interface): used to connect with the RS485

interface of the PWRDB on the power distribution shelf, and receive the power, fan, access control and environment alarm information monitored by the PWRD.

 GPS485 (RJ45 interface): used to connect and communicate

with the GPS module.

 RS232 (RJ45 interface): used to remotely access the OMC.

Strictly observe operation regulations to prevent electrostatic damage to large scale integrated circuits on the board.