Service Dialing Failure; Low Grps Data Transmission Rate; Table 11-4 Possible Causes And Handling Suggestions For Service Dialing Failure; Table 11-5 Description Of The Dip Switch Sw2 On The Gtmu - Huawei BTS3900 GSM Commissioning Manual

11 FAQs for BTS Commissioning

11.4 Service Dialing Failure

This describes the fault symptom and analyzes the cause of the service dialing failure. It also
provides the fault handling suggestions.
Fault Symptom
Service dialing failure may occur in either of the following cases:
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Cause Analysis and Handling Suggestion
Table 11-4

Table 11-4 Possible causes and handling suggestions for service dialing failure

Cause of the Fault
The MS is faulty.
The CS domain or the PS domain on the CN side is not
ready.

11.5 Low GRPS Data Transmission Rate

This describes the fault symptom and analyzes the cause of low GPRS data transmission rate.
Fault Symptom
During the service test, the following problems may occur: low GPRS data rate in the PS domain
of the newly added BTS, or a high BER on the Abis interface.
Cause Analysis
The possible causes are as follows:
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11-6
Location update failure
Service dialing failure
lists the possible causes and related suggestions.
The E1 cable is not properly grounded. You can enable the grounding status of the E1 cable
by setting the DIP switch SW2 on the GTMU.
SW2.

Table 11-5 Description of the DIP switch SW2 on the GTMU

Setting of DIP Bit
1 2
ON ON
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Table 11-5
3 4
ON ON
Commissioning Guide
Handling Suggestion
Replace the MS with a new one.
Keep the CS domain and the PS
domain ready.
describes the DIP switch
Description
The E1 cable is grounded.
Issue 03 (2008-07-15)
BTS3900 GSM