Optional Commissioning Tasks - Huawei BTS3900 GSM Commissioning Manual

BTS3900(A) GSM
Commissioning Guide
About This Chapter
The optional commissioning tasks are the VSWR check, output power of the TRX check,
loopback test check, settings of the DIP switches on the board check, transmission between the
BBU and the BSC on the BTS side check, transmission between cascaded TRXs check, and
TRX ring topology check.
6.1 Commissioning the Antenna System
This describes how to commission the antenna system. You must check whether the VSWR is
normal, whether the output power of the TRX is normal, and whether the antenna is connected
properly. If an RET antenna is configured, you need to commission it.
6.2 Performing the Loopback Test
This describes how to perform the loopback test. The loopback test is optional. Before testing
CS and PS services, you must check the transmission links of the signaling channels and traffic
channels in the BTS. Loopback tests can be classified into the carrier loopback test and the
channel loopback test.
6.3 Checking the DIP Switch Settings of the Boards
This describes how to check whether the settings of the DIP switches on the board are correct.
You can perform this task by checking whether the attribute values corresponding to the DIP
switches meet the actual requirements on the LMT.
6.4 Locally Checking the Transmission Between the BBU and the BSC
This describes how to check the status of the LEDs on the GTMU panel, how to check the
connections of the E1 cable and E1 surge protection transfer cable. It also describes how to clear
the fault caused by improper connections to ensure that the BBU communicates properly with
the BSC.
6.5 Checking the Transmission Between Cascaded TRXs
This describes how to check the transmission between cascaded TRXs. The following
description is based on three levels of cascaded TRXs.
6.6 Checking TRXs in Ring Topology
This describes how to check TRXs in ring topology on site. The following description is based
on level 3 of TRXs in ring topology.
Issue 02 (2009-04-20)
6

Optional Commissioning Tasks

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6 Optional Commissioning Tasks
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