In BM/TC separated configuration mode, the GTCS is configured in the GBCR or GBSR. The BSC can be configured with zero to four GTCSs. The GTCS performs transcoding, rate adaptation, and sub-multiplexing.
The GTCS must be configured with the GSCU and GTNU. The GDPUX, GEIUA/GOIUA, and GEIUT/GOIUT are optional boards.
When the E1/T1 transmission is used on the A interface, one GTCS supports a maximum of 4,800 speech paths. Figure 1 shows the fully configured GTCS.
When the STM-1 transmission is used on the A interface, one GTCS supports a maximum of 9,600 speech paths. Figure 2 shows the fully configured GTCS.
CAUTION: The GDPUX inherits all the functions of the GDPUC. The GTCS can be configured with the GDPUX, GDPUC, or both GDPUX and GDPUC.
For details on the boards in the GTCS, refer to BSC Boards.