User Manual
iSiteC BTS3601C CDMA Base Station
BTS Maintenance
Chapter 4 Fault Analysis and Locating
4-5
II. Troubleshooting
Fault cause
Fault location
Handling methods
Remarks
The physical
link is faulty
on the BSC
side
Check whether the
corresponding CIXE is in
the normal status and
whether the E1 cable is
properly plugged.
1. Check cables on the BSC side and
properly connect the E1 cable with BSC.
2. Loopback the corresponding E1 port
in DDF toward BSC in the equipment
room. If the CXIE board of BSC is
normal, there should be no fault with the
physical link on the BSC side.
The physical
link is faulty
on the BTS
side
Transmission cables are
not properly plugged in
the BTS.
1. Check the physical transmission
cables and properly connect the E1
cable with BTS.
2. Loopback the corresponding E1 cable
in DDF toward BTS in the equipment
room. If E1 is tested to be normal via the
remote loopback test activated by BTS,
there should be no fault with the physical
link on the BTS side.
Transmission
system fault
Check the BER of the
corresponding E1 trunk. If
the BER is greater than
the specified value,
transmission problems
may exist.
Contact Huawei local office to solve the
problems in the transmission system.
Check BER in the following steps:
Execute the command for E1 outloop
test on the maintenance console of BSC,
and measure the BER of the
corresponding E1 with BER tester on the
MSC side.
4.2.2 OML Fault
I. Fault Description
After BTS is powered on,
l
the BOOTP process fails, or
l
the attempt to establish OML signaling link to OMC fails, or
l
the OML link breaks while the BTS is running.
The “OML Fault" alarm can be viewed from the BTS maintenance console.
II. Troubleshooting
Fault cause
Fault location
Handling methods
Remarks
Physical link
problems on
the BSC side
Please refer to "4.2.1 Transmission
Equipment Fault"
Equipment
fault on BSC
side
Remote OMC fault
1. BAM is abnormal or the BAM process is
not activated. Restart the BAM process in
this case.
2 If the loading process of BAM appears
abnormal, restart the loading process.
3 The lower-layer communication process
of BAM is abnormal – Restart the
communication process in this case.
The remote OMC serves as BOOTP
Server and OML Server during OML
establishment. Therefore, any fault
with the remote OMC will result in
OML fault.
