GSM Audio Problems and

Dear Osmocom list We are getting several audio problems and dropped calls. The audio sounds like static. We are also getting large frame correction in the logs, and SACCH deactivation timeout. Any ideas what could be the likely culprit? 2017-03-24_14:30:57.93546 <001a> rtp_proxy.c:295 Correcting frame difference of 74518293571 frames 2017-03-24_14:31:11.45899 <001a> rtp_proxy.c:295 Correcting frame difference of 1 frames 2017-03-24_14:31:11.51590 <001a> rtp_proxy.c:295 Correcting frame difference of 2 frames 2017-03-24_14:31:11.65513 <001a> rtp_proxy.c:295 Correcting frame difference of 1 frames 2017-03-24_14:32:08.95028 <0004> abis_rsl.c:1343 (bts=1,trx=0,ts=1,ss=0) SACCH deactivation timeout. 2017-03-24_14:37:10.11844 <0004> abis_rsl.c:662 (bts=1,trx=0,ts=1,ss=0) is back in operation.