Here is log from DID sent to "TERMINATE CALL/HUNGUP"
Notice the SIP 603
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[2013-04-08 18:53:03] VERBOSE[4430] chan_sip.c: — (17 headers 11 lines) —
[2013-04-08 18:53:03] VERBOSE[4430] chan_sip.c: Sending to 216.115.69.144:5060 (NAT)
[2013-04-08 18:53:03] VERBOSE[4430] chan_sip.c: Using INVITE request as basis request - 1342726370_14996747@4.55.17.35
[2013-04-08 18:53:03] VERBOSE[4430] chan_sip.c: Found peer ‘FlowRoute_LV’ for ‘+12039796621’ from 216.115.69.144:5060
[2013-04-08 18:53:03] VERBOSE[4430] chan_sip.c: Found RTP audio format 0
[2013-04-08 18:53:03] VERBOSE[4430] chan_sip.c: Found RTP audio format 18
[2013-04-08 18:53:03] VERBOSE[4430] chan_sip.c: Found RTP audio format 101
[2013-04-08 18:53:03] VERBOSE[4430] chan_sip.c: Found audio description format G729 for ID 18
[2013-04-08 18:53:03] VERBOSE[4430] chan_sip.c: Found audio description format telephone-event for ID 101
[2013-04-08 18:53:03] VERBOSE[4430] chan_sip.c: Capabilities: us - (ulaw|g729), peer - audio=(ulaw|g729)/video=(nothing)/text=(nothing), combined - (ulaw|g729)
[2013-04-08 18:53:03] VERBOSE[4430] chan_sip.c: Non-codec capabilities (dtmf): us - 0x1 (telephone-event|), peer - 0x1 (telephone-event|), combined - 0x1 (telephone-event|)
[2013-04-08 18:53:03] VERBOSE[4430] chan_sip.c: Peer audio RTP is at port 4.55.17.2:5480
[2013-04-08 18:53:03] VERBOSE[4430] chan_sip.c: Looking for 12036354616 in from-trunk (domain 67.86.3.196)
[2013-04-08 18:53:03] VERBOSE[4430] chan_sip.c: list_route: hop: sip:216.115.69.144;lr
[2013-04-08 18:53:03] VERBOSE[4430] chan_sip.c: list_route: hop: sip:216.115.69.132;lr
[2013-04-08 18:53:03] VERBOSE[4430] chan_sip.c:
<— Transmitting (NAT) to 216.115.69.144:5060 —>
SIP/2.0 100 Trying
Via: SIP/2.0/UDP 216.115.69.144;branch=z9hG4bKf33.419f46c4090843a0c7ed973b5e6db5cb.0;received=216.115.69.144;rport=5060
Via: SIP/2.0/UDP 216.115.69.131;branch=z9hG4bKf33.a47369df893979bd23418fd2c651a491.0
Via: SIP/2.0/UDP 216.115.69.132;branch=z9hG4bKf33.c171fd5a1010d5f35ce97d967a887766.0
Via: SIP/2.0/UDP 4.55.17.35:5060;branch=z9hG4bK08B4aa91680ee9ea28a
Record-Route: sip:216.115.69.144;lr
Record-Route: sip:216.115.69.132;lr
From: sip:+12039796621@flowroute.com;tag=gK08
To: sip:+12036354616@flowroute.com
Call-ID: 1342726370_14996747@4.55.17.35
CSeq: 26854 INVITE
Server: FPBX-2.10.1(10.12.1)
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH
Supported: replaces, timer
Contact: sip:12036354616@67.86.3.196:5060
Content-Length: 0
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[2013-04-08 18:53:03] VERBOSE[5228] chan_sip.c: Scheduling destruction of SIP dialog ‘1342726370_14996747@4.55.17.35’ in 32000 ms (Method: INVITE)
[2013-04-08 18:53:03] VERBOSE[5228] chan_sip.c:
<— Reliably Transmitting (NAT) to 216.115.69.144:5060 —>
SIP/2.0 603 Declined
****************************** note ******************************************************
Via: SIP/2.0/UDP 216.115.69.144;branch=z9hG4bKf33.419f46c4090843a0c7ed973b5e6db5cb.0;received=216.115.69.144;rport=5060
Via: SIP/2.0/UDP 216.115.69.131;branch=z9hG4bKf33.a47369df893979bd23418fd2c651a491.0
Via: SIP/2.0/UDP 216.115.69.132;branch=z9hG4bKf33.c171fd5a1010d5f35ce97d967a887766.0
Via: SIP/2.0/UDP 4.55.17.35:5060;branch=z9hG4bK08B4aa91680ee9ea28a
From: sip:+12039796621@flowroute.com;tag=gK081
To: sip:+12036354616@flowroute.com;tag=as062f2
Call-ID: 1342726370_14996747@4.55.17.35
CSeq: 26854 INVITE
Server: FPBX-2.10.1(10.12.1)
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH
Supported: replaces, timer
Content-Length: 0
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[2013-04-08 18:53:03] VERBOSE[4430] chan_sip.c:
<— SIP read from UDP:216.115.69.144:5060 —>
ACK sip:12036354616@67.86.3.196:5060 SIP/2.0
Max-Forwards: 66
To: sip:+12036354616@flowroute.com;tag=as062f2bcd
From: sip:+12039796621@flowroute.com;tag=gK081
Via: SIP/2.0/UDP 216.115.69.144;branch=z9hG4bKf33.419f46c4090843a0c7ed973b5e6db5cb.0
Call-ID: 1342726370_14996747@4.55.17.35
CSeq: 26854 ACK
Content-Length: 0
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[2013-04-08 18:53:03] VERBOSE[4430] chan_sip.c: — (8 headers 0 lines) —
[2013-04-08 18:53:06] NOTICE[4430] chan_sip.c: Correct auth, but based on stale nonce received from ‘“Roger” sip:310@192.168.1.12:5060;tag=f98c2bf338’
[2013-04-08 18:53:14] NOTICE[4430] chan_sip.c: Correct auth, but based on stale nonce received from ‘“Bedroom” sip:315@192.168.1.12:5060;tag=2854c15b73’
[2013-04-08 18:53:15] NOTICE[4430] chan_sip.c: Correct auth, but based on stale nonce received from ‘“Bedroom” sip:315@192.168.1.12:5060;tag=18f939ec62’
[2013-04-08 18:53:21] VERBOSE[4430] chan_sip.c:
<— SIP read from UDP:216.115.69.144:5060 —>
OPTIONS sip:67.86.3.196:5060 SIP/2.0
Max-Forwards: 10
Record-Route: sip:216.115.69.144;lr
Via: SIP/2.0/UDP 216.115.69.144;branch=z9hG4bK26e6.433a3ed0dd64292904557a4c4316e945.0
Via: SIP/2.0/UDP 216.115.69.131:5060;branch=0
Route: sip:216.115.69.144;lr;received='sip:67.86.3.196:5060’
From: sip:ping@invalid;tag=06f30bd3
To: sip:67.86.3.196:5060
Call-ID: 704d6c77-f1802945-82db4d4@216.115.69.131
CSeq: 1 OPTIONS
Content-Length: 0
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[2013-04-08 18:53:21] VERBOSE[4430] chan_sip.c: — (11 headers 0 lines) —
[2013-04-08 18:53:21] VERBOSE[4430] chan_sip.c: Looking for s in from-sip-external (domain 67.86.3.196)
[2013-04-08 18:53:21] VERBOSE[4430] chan_sip.c:
<— Transmitting (NAT) to 216.115.69.144:5060 —>
SIP/2.0 200 OK
Via: SIP/2.0/UDP 216.115.69.144;branch=z9hG4bK26e6.433a3ed0dd64292904557a4c4316e945.0;received=216.115.69.144;rport=5060
Via: SIP/2.0/UDP 216.115.69.131:5060;branch=0
Record-Route: sip:216.115.69.144;lr
From: sip:ping@invalid;tag=06f30bd3
To: sip:67.86.3.196:5060;tag=as52dc28a5
Call-ID: 704d6c77-f1802945-82db4d4@216.115.69.131
CSeq: 1 OPTIONS
Server: FPBX-2.10.1(10.12.1)
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH
Supported: replaces, timer
Contact: sip:67.86.3.196:5060
Accept: application/sdp
Content-Length: 0
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[2013-04-08 18:53:23] NOTICE[5230] manager.c: Seems to have passed…
[2013-04-08 18:53:26] NOTICE[5232] manager.c: Seems to have passed…