User Manual

CCP Backplane Troubleshooting – continued

July 1999

5-17

SC 4812ET BTS Optimization/ATP – CDMA LMF

PRELIMINARY 2

No AMR Control (MGLI2 good)

Table 5-18: MGLI2 Control Good – No Control over AMR

Step Action

1 Check the appropriate ISB cables connectors and ISB

backplane connectors for proper connection and damage.

2 Visually check the master GLI2 connector (both board and

backplane) for damage.

3 Replace the master GLI2 with a known good GLI2.

4 Replace the AMR with a known good AMR.

5 Verify ISB terminations are installed. Check connectors (both

cable and backplane) for damage. Replace the ISB cable with

a known good cable.

NOTE

Externally route the cable to bypass suspect segment.

No BBX2 Control in the Shelf

Table 5-19: MGLI2 Control Good – 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.

5 Verify ISB terminations are installed. Check connectors (both

cable and backplane) for damage. Replace the ISB cable with

a known good cable.

NOTE

Externally route the cable to bypass suspect segment.