This describes how to configure clocks for the BSC when the BM and TC are configured in the same subrack. The BSC clocks are responsible for the synchronization of boards in each subrack.
Configuring the Line Clock for the GMPS
The line clock of the BSC is provided by the MSC. When the BM and TC are configured in the same subrack, the GMPS extracts the line clock from the MSC through the A interface board. This line clock is used as the reference clock for the GMPS and the GEPS.
Configuring the System Clock
This describes how to configure the system clock, that is, the input clock for the GGCU. The input clock for the GGCU can be the 2 MHz or 2 Mbit/s external clock or the line clock extracted from the MSC through the A interface board. The GGCU processes the input clock and generates the 8 kHz clock, which is used as the transmission synchronization clock and the time synchronization clock for the boards in the GMPS or GEPS.
Configuring the 8 kHz Reference Clock for the GMPS
This describes how to configure the 8 kHz clock provided by the backplane of the GGCU as the 8 kHz reference clock for the GMPS. The 8 kHz reference clock serves as the synchronization clock for the boards in the GMPS.
Configuring the 8K Reference Clock for the GEPS
This describes how to configure the 8 kHz clock provided by the GGCU as the 8 kHz reference clock for the GEPS. The 8 kHz reference clock serves as the synchronization clock for the boards in the GEPS.