Reasons for Alarm
Hardware Issues:
BTS unit hardware failures (TRX, BB2F,WCxA,DVxA)
Crossed feeder cables.
Bad SMA cable , bad feeder quality or their improper connectivity.
RSSI values on the main and diversity paths are differing a lot.
RF Issues:
BCCH Frequency used in MAL list
Some segments in the network using same BCCH Frequency
Value of TSC parameter is same as BCC value
High Interference caused in the network
BSC/Network Issues:
LAPD message distribution problem due to unused (floating) TRX signaling links on the BCSU concerned
Telecom links overloading the BCSU
Repeated Transmission Failures