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User Manual
Airbridge cBTS3612-450 12-carrier CDMA Base Station
IV. No signal at the optical interface
No signal at the optical interface. Mostly means there are something wrong between
the BRDM board and the BTRM board.First check related optical interfaces to see
whether any optical interface has been configured without any optical fiber inserted,
whether the boards or modules on bothl sides of the optical fiber is normal and the
optical fiber is damaged or broken. If there is any of such cases hanppened, please
refer to the corresponding part in this chapter and handle it. After other possible
reasons have been eliminated, it can be located to the corresponding board or
module, which should be reset. If the fault still exists, the corresponding board or
module needs replacing.
V. Other faults
Other possible common faults include:
Board resetting, excessively high CPU occupation rate, link to escape serial port
damaged, initialization of minor board components failure, CELL BUS clock lost,
excessively high CELL BUS frame error rate and CELL BUS driving components
malfunction.
If the above faults seldom occur or are recovered very soon, then make a further
observation. If they occur frequently (or have been occurring continuously) and have
seriously affected the function of a base station, then please observe whether there is
any other fault occurring at the same time and locate it. Otherwise, reset the
corresponding board. If the fault still exists, the corresponding board should be
replaced.
6.3 BTS Control Interface Module (BCIM)
6.3.1 Description of Fault
1)
The base station, when powered on, cannot establish the OML with the OMC
and BOOTP request fails.
2)
During the running of the base station, the communication links operation &
maintenance, signaling or service are interrupted. In this case, you may observe
the E1, IMA group or IMA/UNI link alarms. at the near-end maintenance
console .
6.3.2 Fault Analysis and Location
I. The BCIM does not work normally
When the BCIM is powered on and, is initializing, the RUN, ALM and ACT indicators
are lighted. If the initialization fails, the watchdog will reset the board. After the board
has been initialized, it sends a reset report to the OMU to request for configurations.
In this case, the RUN indicator flashes on the frequency of 4Hz. After the board
receives the configuration and is in service, the RUN indicator will flash on the
frequency of 0.5Hz.If the ALM and ACT indicators flash on the frequency of 4Hz after
initialization, there must be some fault occurred to the communication link between
the board and the OMU. If the fault only occurs to the communication link between
the board and the OMU, the cause may lie in the board. Then, please check whether
the board is well plugged. If faults occur to the communication link between other
board and the OMU at the same time, there may be some faults in BCKM or base
03Q-0112-20020720-120
6 Part Module Fault
6-4
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