BTS Fault Alarm
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Types of Fault Map
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Internal Class 1A
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Internal to BTS, affecting MO, within MO
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Internal Class 1B
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Internal to BTS, affecting MO, within MO environment
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Internal Class 2A
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Internal to BTS, not affecting MO, within MO
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External Class 1
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External to BTS and affecting MO
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External Class 2
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External to BTS not affecting MO
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The alarm slogan is the description of the current alarm situation for an MO or TG. The alarm slogans 'BTS INTERNAL' and 'BTS EXTERNAL' each describe more than one alarm situation. The remaining alarm slogans each describe a unique alarm situation. This section describes how each alarm slogan should be interpreted.
TGC FAULT No active TGC application exists in the Transceiver Group.
PERMANENT FAULT A managed object is classified as being permanently faulty when fault situations have occurred, and have been cleared, a certain number of times within a certain period of time. Manual intervention is required to bring such equipment back into operation.
LOCAL MODE The BTS equipment is in Local Mode or the BTS equipment has changed from Local to Remote Mode and a fault exists in the communication link between the BSC and the BTS. Communication between the BSC and the BTS is not possible.
LMT INTERVENTION Local maintenance activities are being performed in the BTS.
LOOP TEST FAILED Test of the traffic carrying capabilities of the TS has failed.
BTS INTERNAL There is a fault internal to the BTS.
MAINS FAILURE There is a fault in the power supply to the BTS or one or more items of equipment within the BTS. Battery backup (where available) is in use. Escalation may occur if corrective action is not taken.
BTS EXTERNAL There is a fault external to the BTS.
OML FAULT There is a fault in the communications link between the BSC and BTS.
ABIS PATH UNAVAIL No transmission device exists between the BSC and BTS.
CON QUEUE CONGESTION At least one of the LAPD Concentrator concentration outlet queues has reached an unacceptable filling level.
TS SYNC FAULT Synchronization lost on uplink or downlink TRA or PCU channels.
FORLOPP RELEASE A fault has occurred within the BSC software leading to a Forlopp release. Automatic recovery procedures are taking place. Report to your Ericsson Support Office. Alternatively, this alarm is issued as an advisory following a command ordered Forlopp release of a TG. In either case, the alarm is automatically ceased following successful recovery.
OPERATOR CONDITION A condition has arisen due to operator intervention
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BSC
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Base Station
Controller
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BTS
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Base Transceiver
Station
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CF
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Central Functions
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CON
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LAPD Concentrator
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DP
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Digital Path
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IS
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Interface Switch
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LAPD
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Link Access Protocol
for the D channel
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LMT
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Local Maintenance
Terminal
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MO
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Managed Object
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OML
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Operation and
Maintenance Link
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PCU
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Packet Control Unit
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RBS
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Radio Base Station
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RX
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Receiver
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TF
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Timing Function
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TG
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Transceiver Group
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TGC
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Transceiver Group
Controller
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TRA
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Transcoder Rate
Adaptor
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TRXC
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Transceiver Controller
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TS
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Timeslot
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TX
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Transmitter
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