Principles of Configuring the BSC Devices (A over IP)

This describes the principles of configuring the cabinets, subracks, and boards for the BSC in A over IP mode.

Cabinet

The principles of configuring the BSC cabinets are as follows:

The GBCR cabinet is configured locally. In addition, only one GBCR cabinet can be configured.
The GEPS and GMPS can be configured in the cabinet.
Each cabinet must be configured with a power distribution box and a subrack must be specified for managing the power distribution box.

Subrack

The principles of configuring BSC subracks are as follows:

The GMPS is mandatory for the BSC. Each BSC must be configured with one GMPS and zero to three GEPSs.
By default, a GMPS is configured in cabinet 0 of the BSC. New subracks are configured from the bottom up.
The GMPS attributes, GEPS attributes, and the boards in these subracks, must be configured in sequence.
Each subrack is configured with a fan box. The fan box is added automatically when you add a subrack.
If the BSC is configured with the GBAM, a pair of active/standby GGCUs, a pair of active/standby GTNUs, and a pair of active/standby GSCUs are configured in the GMPS by default. If the BSC is configured with the GOMU, a pair of active/standby GGCUs, a pair of active/standby GTNUs, a pair of active/standby GSCUs, and a pair of active/standby GOMUs are configured in the GMPS by default. By default, a pair of active/standby GTNUs and a pair of active/standby GSCUs are configured in the GEPS. All the boards except the GOMU can be removed only when you remove the subracks where these boards are located.

Board

The principles of configuring the BSC boards are as follows:

The A interface, Abis interface, Pb interface (when the BSC is configured with an external PCU), and Gb interface (when the BSC is configured with a built-in PCU) support the E1/T1, STM-1, and IP transmission modes. The Abis interface also supports the HDLC transmission mode. The E1/T1 transmission mode and STM-1 transmission mode can coexist in one subrack. To facilitate configuration and maintenance, Huawei recommends that one interface should use the same type of interface board. Do not configure different types of interface boards together.
To ensure the system reliability, Huawei recommends that all the boards, except for the GDPUX/GDPUP, be configured in active/standby mode.
The GOIUA, GOIUB, and GOIUP support the APS function. If the GOIUB and the GOIUP are configured in active/standby mode, the APS function is enabled by default.

If the BSC is configured with the GBAM, then the GGCU, GSCU, and GTNU are configured by default. If the BSC is configured with the GOMU, then the GGCU, GSCU, GTNU, and GOMU are configured by default. Table 1 lists the principles of configuring the boards except for those configured by default.

**Table 1** Principles of configuring the BSC boards
Board	Configuration Principle
GDPUX	The GDPUX is configured in the GMPS. The GDPUX supports the resource pool mode.
GOGUA/GFGUA	When the BSC uses the A over IP mode, the GFGUA is configured in the GMPS or GEPS to achieve the FE or GE auto-sensing electrical transmission on the A interface. When the BSC uses the A over IP mode, the GOGUA is configured in the GMPS or GEPS to achieve the GE optical transmission on the A interface. The GOGUA and GFGUA support the independent mode and the active/standby mode. The active/standby mode is recommended.
GEIUB/GOIUB/GOGUB/GEHUB/GFGUB	The GEIUB/GOIUB/GFGUB/GOGUB/GEHUB is configured in the GMPS or the GEPS. The number of boards to be configured depends on the system specifications. The GEIUB/GOIUB/GFGUB/GOGUB/GEHUB supports the independent mode and the active/standby mode. The active/standby mode is recommended. The GEIUB and GOIUB can be configured in one subrack if required. When the BSC communicates with the BTS in TDM transmission mode, the GEIUB and the GOIUB are configured. When the BSC communicates with the BTS in HDLC/HUB transmission mode, the GEHUB is configured. When the BSC communicates with the BTS in IP transmission mode, the GFGUB and the GOGUB are configured.
GEIUP/GOIUP	The GEIUP/GOIUP is configured when the BSC is configured with the external PCU. The GEIUP/GOIUP is configured in the GMPS/GEPS. The numbers of boards to be configured depend on the system specifications. The GEIUP/GOIUP supports the independent mode and the active/standby mode. The active/standby mode is recommended. The GEIUP and the GOIUP can be configured in one subrack if required.
GFGUG/GEPUG	When the BSC is configured with the built-in PCU, the GFGUG/GEPUG is configured in the GMPS or the GEPS. When the Gb over FR transmission mode is applied, configure the GEPUG. When the Gb over IP transmission mode is applied, configure the GFGUG. The GFGUG/GEPUG supports the independent mode and the active/standby mode. The active/standby mode is recommended.
GDPUP	When the BSC is configured with the built-in PCU, the GDPUP is configured in the GMPS/GEPS. The GDPUP supports the resource pool mode.
GXPUM	The GXPUM is configured in the GMPS or the GEPS. The number of GXPUMs to be configured depends on the system specifications. The GXPUM supports the independent mode and the active/standby mode. The active/standby mode is recommended.
GXPUT	The GXPUT is configured in the GMPS or the GEPS. The number of GXPUMs to be configured depends on the system specifications. The GXPUT supports the independent mode and the active/standby mode. The active/standby mode is recommended.

NOTE:

On the BSC6000 Local Maintenance Terminal, available board types depend on the subrack type and the slot numbers. Table 1 provides the recommended configurations of the boards. You can modify the configurations according to actual requirements.