Вроде разобрался - форвард на приложение идет. В трубку слышно call_forwarding, но после этого тишина. Внутренний номер приложения 00000005. В логах следующее:
== Using SIP RTP CoS mark 5
-- Executing [00000005@SIP-PROVIDER-429842182516bce0d909b8-incoming:1] NoOp("SIP/SIP-PROVIDER-429842182516bce0d909b8-00000016", "incoming call from provider: GSM to 00000005") in new stack
-- Executing [00000005@SIP-PROVIDER-429842182516bce0d909b8-incoming:2] Set("SIP/SIP-PROVIDER-429842182516bce0d909b8-00000016", "CDR(UserField)=inbound") in new stack
-- Executing [00000005@SIP-PROVIDER-429842182516bce0d909b8-incoming:3] Set("SIP/SIP-PROVIDER-429842182516bce0d909b8-00000016", "CDR(accountcode)=95996602") in new stack
-- Executing [00000005@SIP-PROVIDER-429842182516bce0d909b8-incoming:4] Set("SIP/SIP-PROVIDER-429842182516bce0d909b8-00000016", "RecFile=in_+79172552323_2013-07-12-21-45-05") in new stack
-- Executing [00000005@SIP-PROVIDER-429842182516bce0d909b8-incoming:5] Set("SIP/SIP-PROVIDER-429842182516bce0d909b8-00000016", "CDR(userfield)=in_+79172552323_2013-07-12-21-45-05.gsm") in new stack
-- Executing [00000005@SIP-PROVIDER-429842182516bce0d909b8-incoming:6] Monitor("SIP/SIP-PROVIDER-429842182516bce0d909b8-00000016", "gsm,in_+79172552323_2013-07-12-21-45-05,bm") in new stack
-- Executing [00000005@SIP-PROVIDER-429842182516bce0d909b8-incoming:7] Set("SIP/SIP-PROVIDER-429842182516bce0d909b8-00000016", "CDR(InternalCalleridNum)=_[0-9*#]!") in new stack
-- Executing [00000005@SIP-PROVIDER-429842182516bce0d909b8-incoming:8] Goto("SIP/SIP-PROVIDER-429842182516bce0d909b8-00000016", "DIALPLAN-APPLICATION-11750145951e03bf799070,00000005,1") in new stack
-- Goto (DIALPLAN-APPLICATION-11750145951e03bf799070,00000005,1)
-- Executing [00000005@DIALPLAN-APPLICATION-11750145951e03bf799070:1] ExecIf("SIP/SIP-PROVIDER-429842182516bce0d909b8-00000016", "0?Hangup()") in new stack
-- Executing [00000005@DIALPLAN-APPLICATION-11750145951e03bf799070:2] Playback("SIP/SIP-PROVIDER-429842182516bce0d909b8-00000016", "call-forwarding") in new stack
-- <SIP/SIP-PROVIDER-429842182516bce0d909b8-00000016> Playing 'call-forwarding.ulaw' (language 'ru-ru')
-- Executing [00000005@DIALPLAN-APPLICATION-11750145951e03bf799070:3] Set("SIP/SIP-PROVIDER-429842182516bce0d909b8-00000016", "TMPFILE=/tmp/30448f202b559882c6a79799c3a44d0d.call") in new stack
-- Executing [00000005@DIALPLAN-APPLICATION-11750145951e03bf799070:4] Set("SIP/SIP-PROVIDER-429842182516bce0d909b8-00000016", "CALLFILEDIR=/outgoing/") in new stack
-- Executing [00000005@DIALPLAN-APPLICATION-11750145951e03bf799070:5] System("SIP/SIP-PROVIDER-429842182516bce0d909b8-00000016", "touch /tmp/30448f202b559882c6a79799c3a44d0d.call") in new stack
-- Executing [00000005@DIALPLAN-APPLICATION-11750145951e03bf799070:6] System("SIP/SIP-PROVIDER-429842182516bce0d909b8-00000016", "echo "Channel: LOCAL/"+79172552323"@internal" >> /tmp/30448f202b559882c6a79799c3a44d0d.call") in new stack
-- Executing [00000005@DIALPLAN-APPLICATION-11750145951e03bf799070:7] System("SIP/SIP-PROVIDER-429842182516bce0d909b8-00000016", "echo "MaxRetries: 1" >> /tmp/30448f202b559882c6a79799c3a44d0d.call") in new stack
-- Executing [00000005@DIALPLAN-APPLICATION-11750145951e03bf799070:8] System("SIP/SIP-PROVIDER-429842182516bce0d909b8-00000016", "echo "RetryTime: 10" >> /tmp/30448f202b559882c6a79799c3a44d0d.call") in new stack
-- Executing [00000005@DIALPLAN-APPLICATION-11750145951e03bf799070:9] System("SIP/SIP-PROVIDER-429842182516bce0d909b8-00000016", "echo "WaitTime: 20" >> /tmp/30448f202b559882c6a79799c3a44d0d.call") in new stack
-- Executing [00000005@DIALPLAN-APPLICATION-11750145951e03bf799070:10] System("SIP/SIP-PROVIDER-429842182516bce0d909b8-00000016", "echo "Context: internal" >> /tmp/30448f202b559882c6a79799c3a44d0d.call") in new stack
-- Executing [00000005@DIALPLAN-APPLICATION-11750145951e03bf799070:11] System("SIP/SIP-PROVIDER-429842182516bce0d909b8-00000016", "echo "Extension: 000067" >> /tmp/30448f202b559882c6a79799c3a44d0d.call") in new stack
-- Executing [00000005@DIALPLAN-APPLICATION-11750145951e03bf799070:12] System("SIP/SIP-PROVIDER-429842182516bce0d909b8-00000016", "echo "RetryTime: 10" >> /tmp/30448f202b559882c6a79799c3a44d0d.call") in new stack
-- Executing [00000005@DIALPLAN-APPLICATION-11750145951e03bf799070:13] System("SIP/SIP-PROVIDER-429842182516bce0d909b8-00000016", "echo "Priority: 1" >> /tmp/30448f202b559882c6a79799c3a44d0d.call") in new stack
-- Executing [00000005@DIALPLAN-APPLICATION-11750145951e03bf799070:14] System("SIP/SIP-PROVIDER-429842182516bce0d909b8-00000016", "echo "AlwaysDelete: Yes" >> /tmp/30448f202b559882c6a79799c3a44d0d.call") in new stack
-- Executing [00000005@DIALPLAN-APPLICATION-11750145951e03bf799070:15] System("SIP/SIP-PROVIDER-429842182516bce0d909b8-00000016", "echo >> /tmp/30448f202b559882c6a79799c3a44d0d.call") in new stack
-- Executing [00000005@DIALPLAN-APPLICATION-11750145951e03bf799070:16] System("SIP/SIP-PROVIDER-429842182516bce0d909b8-00000016", "cp /tmp/30448f202b559882c6a79799c3a44d0d.call /outgoing/") in new stack
-- Executing [00000005@DIALPLAN-APPLICATION-11750145951e03bf799070:17] Hangup("SIP/SIP-PROVIDER-429842182516bce0d909b8-00000016", "") in new stack
== Spawn extension (DIALPLAN-APPLICATION-11750145951e03bf799070, 00000005, 17) exited non-zero on 'SIP/SIP-PROVIDER-429842182516bce0d909b8-00000016'
-- Executing [h@DIALPLAN-APPLICATION-11750145951e03bf799070:1] ExecIf("SIP/SIP-PROVIDER-429842182516bce0d909b8-00000016", "1?Hangup()") in new stack
== Spawn extension (DIALPLAN-APPLICATION-11750145951e03bf799070, h, 1) exited non-zero on 'SIP/SIP-PROVIDER-429842182516bce0d909b8-00000016'
Я так понимаю формируется файл "перезвона" и кладется в outgoing, но почему-то не звонит :(