I am working on D-TRX(dual trx) board which is configured as bcch(TS0-bcch, TS1-sdcch/8,TS2-7-tch) and non-bcch(all tch channels)trx.
some time call is fail on non-bcch trx due to revision to old channel.if i analyze the Tems logs,in that log ms recieve the assignment command message and ms start sending sabm frame to trx. but trx did no recive it. after max. no of retry(n200), ms resume the sddch-ladm link and send assignmet failure(roc). most of the time i faced that issue on non-bcch trx. some time that scenario is happen on bcch-trx. i had doubt about frame sync between both trx.as per my understanding frame number on both trx should be same.