User's Manual

C–CCP Backplane Troubleshooting – continued
SC 4812T CDMA BTS Optimization/ATP
May 2000
6-16
No AMR Control (MGLI2 good)
Perform the procedure in Table 6-18 to troubleshoot an AMR control
failure when the MGLI control is good.
Table 6-18: MGLI2 Control Good – No Control over AMR
Step Action
1 Visually check the master GLI2 connector (both board and backplane) for damage.
2 Replace the master GLI2 with a known good GLI2.
3 Replace the AMR with a known good AMR.
No BBX2 Control in the Shelf – (No Control over Co–located
GLI2s)
Perform the procedure in Table 6-19 to troubleshoot a BBX2 control in
the shelf failure.
Table 6-19: No BBX2 Control in the Shelf – No Control over Co–located GLI2s
Step Action
1 Visually check all GLI2 connectors (both board and backplane) for damage.
2 Replace the remaining GLI2 with a known good GLI2.
3 Visually check BBX2 connectors (both board and backplane) for damage.
4 Replace the BBX2 with a known good BBX2.
No (or Missing) Span Line Traffic
Perform the procedure in Table 6-20 to troubleshoot a span line traffic
failure.
Table 6-20: MGLI2 Control Good – No (or Missing) Span Line Traffic
Step Action
1 Visually check all GLI2 connectors (both board and backplane) for damage.
2 Replace the remaining GLI2 with a known good GLI2.
3 Visually check all span line distribution (both connectors and cables) for damage.
4 If the problem seems to be limited to one BBX2, replace the MGLI2 with a known good MGLI2.
5 Perform the BTS Span Parameter Configuration ( see Table 5-3 on page 5-3).
6 Ensure that ISB cabling is correct.
6