Troubleshooting In Bs Cutover And Expansion Stages; Unidirectional Mobile Phone Calls - Zte ZXG10 BS21 Maintenance Manual

ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual
Troubleshooting in BS Cutover
and Expansion Stages

Unidirectional Mobile Phone Calls

1. Symptom
Unidirectional call occurs to mobile phones.
2. Source
Faults occur in dialing.
3. Related parts
The configuration data of MSC, BOSN board of BSC, ETRM and AEM
modules.
4. Fault analyzing and locating
The fault is caused by:
i.
ii. Wrong PCM time slot connection between BSC and MSC or BOSN
iii. The downlink field intensity is imbalanced in the marginal area
iv. The transmitting and receiving of the antenna is reversed.
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Wrong MSC data configuration.
time slot of BSC connection error.
covered by the BS.