User Manual

CCP Backplane Troubleshooting – continued
PRELIMINARY 2
SC 4812ET BTS Optimization/ATP – CDMA LMF
July 1999
5-18
No (or Missing) Span Line Traffic
Table 5-20: BBX2 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 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.
5 If the problem seems to be limited to 1 BBX2, replace the
BBX2 with a known good BBX2.
No (or Missing) MCC24 Channel Elements
Table 5-21: No MCC24 Channel Elements
Step Action
1 Verify CEs on a co–located MCC24 (MccType=2)
2 If the problem seems to be limited to 1 MCC24, replace the
MCC24 with a known good MCC24.
– Check connectors (both board and backplane) for damage.
3 If no CEs on any MCC24:
– visually check BDC INS_ACT
– replace BDC with known good BDC. Check connectors
(both board and backplane) for damage.
– Verify clock reference to CIO.
4 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.
5