The GEPS is configured in the GBCR or GBSR. The BSC can be configured with zero to three GEPSs. The GEPS processes the basic services of the BSC. The configuration of the boards in the GEPS varies with the configuration modes of the BSC subracks.
BM/TC Separated (Built-In PCU)
In BM/TC separated (built-in PCU) configuration mode, the GEPS must be configured with the GTNU, GSCU, GXPUM, GDPUP, and GEPUG/GFGUG. The GDPUX, GXPUT, GEIUB/GOIUB/GEHUB/GFGUB/GOGUB, and GEIUT/GOIUT are optional boards.
Figure 1 shows the fully configured GEPS.
BM/TC Separated (External PCU)
In BM/TC separated (external PCU) configuration mode, the GEPS must be configured with the GTNU, GSCU, and GXPUM. The GXPUT, GEIUB/GOIUB/GEHUB/GFGUB/GOGUB, GEIUP/GOIUP, and GEIUT/GOIUT are optional boards.
Figure 2 shows the fully configured GEPS.
BM/TC Combined (Built-In PCU)
In BM/TC combined (built-in PCU) configuration mode, the GEPS must be configured with the GTNU, GSCU, GXPUM, GDPUX, GDPUP, and GEPUG/GFGUG. The GXPUT, GEIUA/GOIUA, and GEIUB/GOIUB/GEHUB/GFGUB/GOGUB are optional boards.
Figure 3 shows the fully configured GEPS.
BM/TC Combined (External PCU)
In BM/TC combined (external PCU) configuration mode, the GEPS must be configured with the GTNU, GSCU, GXPUM, and GDPUX. The GXPUT, GEIUA/GOIUA, GEIUB/GOIUB/GEHUB/GFGUB/GOGUB, and GEIUP/GOIUP are optional boards.
Figure 4 shows the fully configured GEPS.
A over IP (Built-In PCU)
In A over IP (built-in PCU) configuration mode, the GEPS must be configured with the GTNU, GSCU, GXPUM, GDPUX, GDPUP, GEPUG/GFGUG, and GFGUA/GOGUA. The GXPUT and GEIUB/GOIUB/GEHUB/GFGUB/GOGUB are optional boards.
Figure 5 shows the fully configured GEPS.
A over IP (External PCU)
In A over IP (external PCU) configuration mode, the GEPS must be configured with the GTNU, GSCU, GXPUM, GDPUX, and GFGUA/GOGUA. The GXPUT, GEIUB/GOIUB/GEHUB/GFGUB/GOGUB, and GEIUP/GOIUP are optional boards.
Figure 6 shows the fully configured GEPS.
CAUTION: The GDPUX inherits all the functions of the GDPUC. The GDPUX must be configured in any of the following conditions: in BM/TC combined configuration mode, in BM/TC separated configuration mode with the GEHUB/GFGUB/GOGUB configured, or in A over IP configuration mode.
When the number of TRXs to be supported is greater than 256, a pair of GXPUTs must be configured in the GEPS.
The A, Abis, Ater, and Pb interfaces support E1/T1, FE/GE, and STM-1 transmissions. The Gb interface supports E1/T1 and FE/GE transmissions. The previous figures take E1/T1 transmission as examples, where the GEIUA/GEIUB/GEIUT/GEIUP/GEHUB/GEPUG is configured.
For details on the boards in the GEPS, refer to BSC Boards.