I am having an issue with Shared lines. My setup is this Freeswitch (Version 1.3.17+git~20130312T033518Z~7d29a92f55) -> Acme SBC -> Polycom 550 (PolycomSoundPointIP-SPIP_550-UA/4.0.3.7562) . If I point the Polycom phone directly to freeswitch everything works as it should. The issue appears when I route though the Acme SBC.. When I make a call from the Polycom 550, I get a 15sec pause and then the call completes. After much investigation, I have discovered that the issue appears to be that freeswitch sends a notify with a from_tag that is not part of an established dialog and my SBC responds with 481 Missing Dialog. Looking at the sip trace below the phone subscribes -> Freeswitch Accepts(with correct from tag) ->freeswitch then sends a Notify with wrong from_tag. ->SBC responds with 481. The odd part is that that after the phone times out and re-subscribes this time Freeswitch sends a Notify with the same form_tag as the Accept and the call completes and SCA works fine. Below is the siptrace between freeswitch and my SBC Anyone have any ideas what this might be? Thanks Doug ------------------------------------------------------------------------ SUBSCRIBE sip:1234567890@fs.domain.com:5060 SIP/2.0 Via: SIP/2.0/UDP 10.10.10.9:5060;branch=z9hG4bKpsndha200gk1fu8df4d0.2 From: "1234567890" <sip:1234567890@sip.domain.com>;tag=7F95269B-FA2A50CA To: <sip:1234567890@sip.domain.com> CSeq: 1 SUBSCRIBE Call-ID: 1aa7577-9c569066-3952c105@192.168.200.105<mailto:1aa7577-9c569066-3952c105@192.168.200.105> Contact: <sip:1234567890@10.10.10.9:5060;ep=192.168.200.105;transport=udp> Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, INFO, MESSAGE, SUBSCRIBE, NOTIFY, PRACK, UPDATE, REFER Event: line-seize Call-Info: <sip:sip.domain.com>;appearance-index=1 User-Agent: PolycomSoundPointIP-SPIP_550-UA/4.0.3.7562 Accept-Language: en Max-Forwards: 69 Expires: 30 Content-Length: 0 ------------------------------------------------------------------------ send 813 bytes to udp/[10.10.10.9]:5060 at 17:38:11.774056: ------------------------------------------------------------------------ SIP/2.0 202 Accepted Via: SIP/2.0/UDP 10.10.10.9:5060;branch=z9hG4bKpsndha200gk1fu8df4d0.2 From: "1234567890" <sip:1234567890@sip.domain.com>;tag=7F95269B-FA2A50CA To: <sip:1234567890@sip.domain.com>;tag=DKrccCoqCvac Call-ID: 1aa7577-9c569066-3952c105@192.168.200.105<mailto:1aa7577-9c569066-3952c105@192.168.200.105> CSeq: 1 SUBSCRIBE Contact: <sip:1234567890@10.10.10.10:5060> Expires: 30 User-Agent: FreeSWITCH-mod_sofia/1.3.17+git~20130312T033518Z~7d29a92f55 Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, INFO, UPDATE, REGISTER, REFER, NOTIFY, PUBLISH, SUBSCRIBE Supported: timer, precondition, path, replaces Allow-Events: talk, hold, conference, presence, dialog, line-seize, call-info, sla, include-session-description, presence.winfo, message-summary, refer Subscription-State: active;expires=30 Content-Length: 0 ------------------------------------------------------------------------ send 968 bytes to udp/[10.10.10.9]:5060 at 17:38:11.774279: ------------------------------------------------------------------------ NOTIFY sip:1234567890@10.10.10.9:5060;ep=192.168.200.105;transport=udp SIP/2.0 Via: SIP/2.0/UDP 10.10.10.10;rport;branch=z9hG4bKvg7p3cN60g7aQ Max-Forwards: 70 From: <sip:1234567890@sip.domain.com>;tag=939D8tZtU5g7m To: "1234567890" <sip:1234567890@sip.domain.com>;tag=7F95269B-FA2A50CA Call-ID: 1aa7577-9c569066-3952c105@192.168.200.105<mailto:1aa7577-9c569066-3952c105@192.168.200.105> CSeq: 41262081 NOTIFY Contact: <sip:1234567890@10.10.10.10:5060> Expires: 30 Call-Info: <sip:sip.domain.com>;appearance-index=1 User-Agent: FreeSWITCH-mod_sofia/1.3.17+git~20130312T033518Z~7d29a92f55 Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, INFO, UPDATE, REGISTER, REFER, NOTIFY, PUBLISH, SUBSCRIBE Supported: timer, precondition, path, replaces Event: line-seize Allow-Events: talk, hold, conference, presence, dialog, line-seize, call-info, sla, include-session-description, presence.winfo, message-summary, refer Subscription-State: active;expires=30 Content-Length: 0 ------------------------------------------------------------------------ send 1077 bytes to udp/[10.10.10.9]:5060 at 17:38:11.775249: ------------------------------------------------------------------------ NOTIFY sip:1234567890@10.10.10.9:5060;ep=192.168.200.105;transport=udp SIP/2.0 Via: SIP/2.0/UDP 10.10.10.10;rport;branch=z9hG4bKXS0F5759XSXXj Max-Forwards: 70 From: <sip:1234567890@sip.domain.com>;tag=2OCFR236kQ0l To: "1234567890" <sip:1234567890@sip.domain.com>;tag=882868A3-8F845D52 Call-ID: dab1917f-2f9a96ee-a7f17a0d@192.168.200.105<mailto:dab1917f-2f9a96ee-a7f17a0d@192.168.200.105> CSeq: 505025480 NOTIFY Contact: <sip:1234567890@10.10.10.10:5060;transport=udp> Call-Info: <sip:sip.domain.com>;appearance-index=1;appearance-state=seized Call-Info: <sip:sip.domain.com>;appearance-index=*;appearance-state=idle User-Agent: FreeSWITCH-mod_sofia/1.3.17+git~20130312T033518Z~7d29a92f55 Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, INFO, UPDATE, REGISTER, REFER, NOTIFY, PUBLISH, SUBSCRIBE Supported: timer, precondition, path, replaces Event: call-info Allow-Events: talk, hold, conference, presence, dialog, line-seize, call-info, sla, include-session-description, presence.winfo, message-summary, refer Subscription-State: active;expires=587 Content-Length: 0 ------------------------------------------------------------------------ recv 344 bytes from udp/[10.10.10.9]:5060 at 17:38:11.777251: ------------------------------------------------------------------------ SIP/2.0 481 Missing Dialog Via: SIP/2.0/UDP 10.10.10.10;received=10.10.10.10;branch=z9hG4bKvg7p3cN60g7aQ;rport=5060 From: <sip:1234567890@sip.domain.com>;tag=939D8tZtU5g7m To: "1234567890" <sip:1234567890@sip.domain.com>;tag=7F95269B-FA2A50CA Call-ID: 1aa7577-9c569066-3952c105@192.168.200.105<mailto:1aa7577-9c569066-3952c105@192.168.200.105> CSeq: 41262081 NOTIFY ------------------------------------------------------------------------ recv 505 bytes from udp/[10.10.10.9]:5060 at 17:38:11.802738: ------------------------------------------------------------------------ SIP/2.0 200 OK Via: SIP/2.0/UDP 10.10.10.10;received=10.10.10.10;branch=z9hG4bKXS0F5759XSXXj;rport=5060 From: <sip:1234567890@sip.domain.com>;tag=2OCFR236kQ0l To: "1234567890" <sip:1234567890@sip.domain.com>;tag=882868A3-8F845D52 Call-ID: dab1917f-2f9a96ee-a7f17a0d@192.168.200.105<mailto:dab1917f-2f9a96ee-a7f17a0d@192.168.200.105> CSeq: 505025480 NOTIFY Contact: <sip:1234567890@10.10.10.9:5060;transport=udp> Event: call-info User-Agent: PolycomSoundPointIP-SPIP_550-UA/4.0.3.7562 Accept-Language: en Content-Length: 0 ------------------------------------------------------------------------