Optimizer. There are some cases where I see no Interference at time slot level and no noticeable HW issues like link balance and High bit error rate. What could cause faulty time slots in cases like this?
if yes : then it is trx hardware problem (even if you don’t detect any other alarm or any other impact on indicator). you should swap this TRX by another one.
if other interface (abis, atermux, a), then it is probably a mis-configuration of the timeslot.