Вот дебаг звонка, где все валится.
2014-08-28 16:28:15.479329 [DEBUG] switch_rtp.c:5831 RTP RECV DTMF *:800
2014-08-28 16:28:15.479329 [DEBUG] switch_channel.c:487 RECV DTMF *:800
2014-08-28 16:28:15.479329 [DEBUG] switch_ivr_bridge.c:470 Send signal
sofia/internal/193@sip.v7r.ru [BREAK]
2014-08-28 16:28:18.419320 [DEBUG] switch_rtp.c:5831 RTP RECV DTMF 4:800
2014-08-28 16:28:18.419320 [DEBUG] switch_channel.c:487 RECV DTMF 4:800
2014-08-28 16:28:18.419320 [DEBUG] switch_ivr_async.c:3507
sofia/internal/193@sip.v7r.ru Processing meta digit '4' [execute_extension::att_xfer XML features]
2014-08-28 16:28:18.419320 [DEBUG] switch_core_session.c:1187 Send signal sofia/internal/sip:194@91.231.141.230:4766 [BREAK]
2014-08-28 16:28:18.419320 [DEBUG] switch_ivr_bridge.c:470 Send signal
sofia/internal/193@sip.v7r.ru [BREAK]
2014-08-28 16:28:18.459332 [DEBUG] switch_core_session.c:907 Send signal sofia/internal/sip:194@91.231.141.230:4766 [BREAK]
2014-08-28 16:28:18.599321 [DEBUG] switch_core_session.c:1187 Send signal
sofia/internal/193@sip.v7r.ru [BREAK]
2014-08-28 16:28:18.619324 [DEBUG] switch_core_session.c:907 Send signal
sofia/internal/193@sip.v7r.ru [BREAK]
2014-08-28 16:28:18.799322 [DEBUG] switch_ivr.c:614
sofia/internal/193@sip.v7r.ru Command Execute playback(local_stream://moh)
EXECUTE
sofia/internal/193@sip.v7r.ru playback(local_stream://moh)
2014-08-28 16:28:18.799322 [WARNING] mod_local_stream.c:470 Unknown source moh, trying 'default'
2014-08-28 16:28:18.799322 [ERR] mod_local_stream.c:479 Unknown source default
2014-08-28 16:28:18.799322 [DEBUG] switch_core_session.c:907 Send signal
sofia/internal/193@sip.v7r.ru [BREAK]
2014-08-28 16:28:18.799322 [DEBUG] switch_ivr_bridge.c:395 Send signal sofia/internal/sip:194@91.231.141.230:4766 [BREAK]
2014-08-28 16:28:20.179331 [WARNING] switch_core_state_machine.c:570 c58708e2-2eae-11e4-852e-0168ab6e4f88
sofia/internal/74956469000@84.52.103.45:5062 Abandoned
2014-08-28 16:28:20.179331 [NOTICE] switch_core_state_machine.c:573 Hangup
sofia/internal/74956469000@84.52.103.45:5062 [CS_NEW] [WRONG_CALL_STATE]