Error Code=500-failed to route the address

Добрый день!
Неделю назад перестал работать один из SIP провайдеров. Сначала грешили на провайдера, дергали его, т.к. у них закрыт пинг. Потом на роутер.
В конце-концов решили проверить софт-телефоном. Телефон заработал нормально.
И ещё интерессный факт - входящие звонки работают. Не подскажите в чем может быть проблема? Вот лог CGPro (версия 5.4.9, OC - Windows 8 x64)

09:39:37.557 4 PBXLEG-002098 enqueued
09:39:37.557 2 PBXLEG-002098 'gatewaycaller' created for pbx@domen.ua
09:39:37.557 5 PBXLEG-002098 REQUEST posted
09:39:37.557 4 PBXLEG-002098 INVITE request received
09:39:37.557 2 PBXLEG-002098 DIALOG-000080(inp) started with 1401@domen.ua(sip:1401@192.168.11.92:3488)(canTransfer)
09:39:37.557 2 PBXLEG-002098 session refresh=1800(active)
09:39:37.557 2 PBXLEG-002098 peer authenticated as '1401@domen.ua'
09:39:37.557 4 PBXLEG-002098 remote SDP set: peer
09:39:37.557 5 PBXLEG-002098 remote SDP: [[871-29689 [192.168.11.92] audio([192.168.11.92]:62498(3,0,8,101)]]
09:39:37.557 5 PBXLEG-002098 leg state=8
09:39:37.557 4 PBXLEG-002098 signalling completed(init)
09:39:37.557 5 PBXLEG-002098 pbx state=1(inited), active
09:39:37.557 2 PBXLEG-002098 gatewaycaller.sppr(Main) started
09:39:37.557 2 PBXLEG-002098 ProgramLog: "calling '0444660466'..."
09:39:37.558 2 PBXLEG-002098 ProgramLog: "Price: #0"
09:39:37.558 2 PBXLEG-002098 ProgramLog: "callerLeg:{\"\"=\"sip:0444660466@89.162.254.10\";Call-ID=F71EC2B42AB82E598A0EB534BF1B42DC30D2A05C.gwout7828;From=\"sip:0444961494@outbound.ip\";Max-Forwards=#69;Via=89.162.254.10;activeSide=YES;callBridged=YES;impersonate=1401@domen.ua;provisionDTMF=YES;}"
09:39:37.558 2 PBXLEG-002098 spawning PBXLEG-002100
09:39:37.558 5 PBXLEG-002098 remote SDP(0) retrieved: [[871-29689 [192.168.11.92] audio([192.168.11.92]:62498(3,0,8,101)]]
09:39:37.558 2 PBXLEG-002098 Event([bridgeStart]) to NODE-002100 sent
09:39:37.558 2 PBXLEG-002098 bridge(NODE-002100) starting
09:39:37.558 5 PBXLEG-002098 pbx state=8(starting bridge), timeout=600s
09:39:37.558 5 PBXLEG-002098 timeout set for 600 secs
09:39:37.558 5 PBXLEG-002098 EVENT posted
09:39:37.558 5 PBXLEG-002098 pbx state=8(starting bridge (final)), timeout=0s
09:39:37.558 1 PBXLEG-002098 bridge(NODE-002100) start transaction failed. Error Code=500-failed to route the address->Server Internal Error
09:39:37.558 1 PBXLEG-002098 bridge(NODE-002100) start transaction failed. Error Code=Server Internal Error
09:39:37.558 2 PBXLEG-002098 bridge(NODE-002100) breaking
09:39:37.558 3 PBXLEG-002098 Event([bridgeDestroy]) to NODE-002100 failed. Error Code=async Object not found
09:39:37.558 5 PBXLEG-002098 pbx state=1(bridge failed), active
09:39:37.558 5 PBXLEG-002098 timeout cleared
09:39:37.558 4 PBXLEG-002098 Event(stop) to NODE-002100
09:39:37.558 3 PBXLEG-002098 Event(stop) to NODE-002100 failed. Error Code=async Object not found
09:39:37.558 2 PBXLEG-002098 ProgramLog: "call failed: errorCode=500-failed to route the address"
09:39:37.582 4 PBXLEG-002098 session timer refreshed
09:39:37.582 5 PBXLEG-002098 leg state=16
09:39:37.582 2 PBXLEG-002098 killing DIALOG-000080
09:39:37.582 2 PBXLEG-002098 rejecting done
09:39:37.582 2 PBXLEG-002098 program stopped
09:39:37.582 4 PBXLEG-002098 leg finishing
09:39:37.582 5 PBXLEG-002098 timeout immediate set
09:39:37.582 4 PBXLEG-002098 dequeued
09:39:37.582 2 PBXLEG-002098 releasing

Best Regards,
Victor Shkrob,
IT Engineer Получено Tue Mar 05 08:05:35 2013