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BTS3900(A) GSM
Commissioning Guide 7 FAQs for BTS Commissioning
7.4 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: l l
Location update failure
Service dialing failure
Cause Analysis and Handling Suggestion
lists the possible causes and related suggestions.
Table 7-4 Possible causes and handling suggestions for service dialing failure
Cause of the Fault Handling Suggestion
The MS is faulty.
Replace the MS with a new one.
The CS domain or the PS domain on the CN side is not ready.
Keep the CS domain and the PS domain ready.
7.5 Low GPRS 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: l
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 .
describes the DIP switch SW2 .
Table 7-5 Description of the DIP switch SW2 on the GTMU
Setting of DIP Bit
1
ON
2
ON
3
ON
4
ON
Description
The E1 cable is grounded.
OFF OFF OFF OFF The E1 cable is not grounded.
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7 FAQs for BTS Commissioning
BTS3900(A) GSM
Commissioning Guide l l l
If...
Only one end of the E1 cable is grounded,
Then...
The E1 cable is grounded properly.
Both ends of the E1 cable are grounded, The E1 cable is not grounded properly.
The data configuration negotiated between the BSC and the BTS is not consistent.
The cell signals are weak.
The MS capability is limited.
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BTS3900(A) GSM
Commissioning Guide 8 Commissioning Record Data Sheet
8
Commissioning Record Data Sheet
Issue 02 (2009-04-20)
This describes the data sheet that is used to record the process and result of the BTS commissioning.
Table 8-1 Data sheet for BTS commissioning
Site Name
BTS Model
Commissioning
Time
Commissioning
Engineer
Scenario □ Transmission available scenario □ Transmission unavailable scenario
□ Successful □ Failed Commissioning
Result
Commissioning Item
Commissioning
Preparation Phase
Commis sioning
Phase
Transmis sion
Unavaila ble Phase
The resources required for commissioning are available.
The commissioning requirements are met.
You have logged in to the BTS through the SMT.
The BTS board and logical objects are available.
The current software version is correct.
Conclusion Handling
Exceptional Case
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8 Commissioning Record Data Sheet
The transmission between the
BBU and the RXU is normal.
No other alarms are reported except the alarms related to the transmission.
The hardware connections are correct.
Site management rights are released.
The transmission between the BBU and the
BSC is available.
Transmis sion
Availabl e Phase
(on the
LMT)
The transmission between the
BBU and the RXU and the transmission between the BBU and the BSC is normal.
The transmission between cascaded BTSs is normal.
The transmission between
BTSs in ring topology is normal.
The board configuration is correct and the boards are in normal operation.
The current software version is correct.
The hardware installation and the data configuration are consistent with each other.
Optional
Commiss ioning
Task
No alarms related to the BTS are reported.
The CS service test is successful.
The PS service test is successful.
The environment monitoring alarm is reported normally.
The VSWR is correct. Record the value of the VSWR.
The output power of the TRX is normal. Record the value of the output power per carrier.
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Commissioning Guide
Issue 02 (2009-04-20)
BTS3900(A) GSM
Commissioning Guide 8 Commissioning Record Data Sheet
The antenna system is properly connected.
The result of the carrier loopback test is normal.
The result of the channel loopback test is normal.
The DIP switch settings are correct.
Commis sioning
Result
Unsolved Problems
After
Commissioning
Unsolved Problems Impact
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BTS3900(A) GSM
Commissioning Guide 9 Communication Ports Used by the GBTS
9
Communication Ports Used by the GBTS
lists the communication port used by the GBTS
Table 9-1 The Communication Port Used by GBTS
Prot ocol
Side
A
Side
A
Ports
(Liste ning)
Side B Side
B
Ports
(Lau nch)
Service
TCP GBT
S
700 SMT 1024-
65535
It will be used by SMT for local maintenance before GBTS connects in the network
-
Authe nticati on
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