7745 alarm CHANNEL FAILURE RATE ABOVE
The rate of calls terminating in failure on a channel is above the
threshold value set by the operator. The alarm is used to supervise
the functioning of traffic and signaling channels, and to detect
the possible faulty channels.
areas to check:
1) first check the cnt cable if ultra bts else check the pins and correct insertion if flexi bts
2) Check frequency interference which may cause channel failure due to excessive BER.
4) change trx backplane
5)change common back plane.
Common causes could be loose cabling and frequency interfernce.