Huawei Airbridge cBTS3612 Maintenance Manual page 33

On-site Maintenance Manual
Airbridge cBTS3612 CDMA Base Station
I.
Failure in communication link between BCKM and BCIM
Please refer to "Board Communication Link Failure" in the "3.2
Handling of Common Board Failure".
Abnormal IMA group and UNI status
II.
If E1 connection is used for the physical l a yer of the OML, we
can configure it to IMA or UNI mode according to the actual needs. If
IMA link set status or UNI status is not correct, the OML will fail.
Through querying the dedicated status of the board on the BTS
maintenance console, we can acquire the IMA link set status or UNI
status.
If there is anything abnormal in the IMA link set status or UNI
status, we will have to check them one by one:
Whether E1 link is correct. It can be checked with a
l
loopback test.
If IMA mode is used, we need to f i rst find out whether the
l
multiple pairs of E1s match each other between the BTS
and BSC, i.e. the No.N pair of E1s in the IMA link set at the
BSC side matches the No.N pair of E1s in the IMA link set
in the BTS (N=1~8).
Whether the configuration of the I M A link set of the BSC
l
and BTS are the same.
III.
Incorrect VCI configuration in the CMUX of the CDMA
BSC Basic Management Subrack (CBMS)
The precondition of successful establishment OML of the BTS is
the successful BOOTP request. BOOTP request package requires
Chapter 2 General Fault
2-14
Processing