[Serusers] Please HELP: TM Module Question

Fri Mar 25 19:25:23 CET 2005

It looks like SER is unable to match the 200 OK received from the SIP
phone with the transaction created by the re-INVITE and thus it relays
it statelessly to the Sonus GW. The Sonus gw then sends ACK which is,
again, forwarded statelessly (so it actually makes it to the UA and
everything is OK), but SER keeps retransmitting the re-INVITE because it
did not "see" the 200 OK. The strange here is that the SIP phone does
not retransmit 200 OK.

Do you have SER logs related to the SIP messages below ? If so, could
you send them to me ? If not, could you generate them and send them to
me ?

  Jan.

On 22-03 13:12, Java Rockx wrote:
> Hi All.
> 
> I have a problem which I think is a Sonus issue, but I need to make
> sure before I blame someone else for what could be my problem.
> 
> The issue is related to re-INVITE messages from a Sonus PSTN gateway
> to my SER-0.9.1 sip proxy.
> 
> Sometimes the Sonus box sends us a retransmitted re-INVITE for which
> SER just sent a 200OK.  It occasionally does this even considering we
> originally reply with a 100Try message.
> 
> So what SER then does is forwards the retransmitted re-INVITE to the
> SIP UA, but the SIP UA ignores this re-INVITE because it just sent a
> 200OK for the original re-INVITE. SER keeps trying to send the
> re-INVITE to the SIP UA until it times out, then it replies to the
> Sonus GW with a 407 Request Timeout and then Sonus disconnects the
> call and sends SER a BYE message.
> 
> Now what I didn't mention yet is that when ser sends a 200OK response
> back to the Sonus box in reponse to the original re-INVITE, rather
> than getting an ACK back from Sonus we get a retransmitted re-INVITE
> and then we get the ACK.
> 
> So since the SIP UA is smart enough to know not to response to the
> retransmitted re-INVITE, shouldn't SER also be smart enough and just
> absorb it rather than relaying it to the SIP UA?
> 
> Anyhow a picture is worth a million words so here is a SIP message log
> that begins with a re-INVITE from the Sonus GW.
> 
> NOTE 1: SER is located behind a Cisco 3600 so the ALG functionality in
> the 3600 has rewritten all the IP address (ie, the 10.3.0.0 network).
> 
> NOTE 2: This problem seems to be random. Some calls are very short and
> others are very long before the disconnect happens - and still others
> are perfectly fine for the call duration.
> 
> NOTE 3: Sonus sends SER a re-INVITE every two minutes.
> 
> Can anyone please confirm that ser has indeed handled this re-INVITE
> properly and that Sonus is actually incorrectly processing calls?
> 
> Is there a way to hack a band-aide here in the event that the problem
> is Sonus and they will not fix their side?
> 
> Regards,
> Paul

> IP Legend:
> ---------------------------------------------------------
> 216.229.127.60 Sonus PSTN Gateway
> 10.3.0.221     ser-0.9.1 proxy behind a Cisco 3600 Router
> 71.53.192.101  UTstarcom iAN-02EX ATA
> 
> 
> 
> U 2005/03/22 12:25:35.839937 216.229.127.60:5060 -> 10.3.0.221:5060
> INVITE sip:3212514277 at 71.53.192.101:5060 SIP/2.0.
> Via: SIP/2.0/UDP 216.229.127.60:5060;branch=z9hG4bK13feab54230-e59180e0.
> Via: SIP/2.0/UDP 216.229.118.76:4060;branch=z9hG4bK059b684ace3bac70.
> To: "Paul" <sip:3212514277 at 216.229.127.60>;tag=3384063503.
> From: sip:3219392336 at sip.mycompany.net;tag=0b8cd3ae.
> Call-ID: 1401520636 at 71.53.192.101.
> CSeq: 7361 INVITE.
> Max-Forwards: 69.
> Contact: sip:3219392336 at 216.229.118.76:4060.
> Record-Route: <sip:216.229.127.60:5060;lr>.
> Route: <sip:10.3.0.221:5060;ftag=3384063503;lr>.
> Allow: OPTIONS, INVITE, CANCEL, ACK, BYE, PRACK, INFO.
> Accept: multipart/mixed, application/sdp, application/isup, application/dtmf, application/dtmf-relay.
> Supported: timer.
> Session-Expires: 240;refresher=uac.
> Content-Disposition: session;handling=required.
> Content-Type: application/sdp.
> Content-Length: 248.
> .
> v=0.
> o=Sonus_UAC 29190 4768 IN IP4 216.229.118.76.
> s=SIP Media Capabilities.
> c=IN IP4 216.229.118.101.
> t=0 0.
> m=audio 19110 RTP/AVP 18 101.
> a=rtpmap:18 G729/8000.
> a=fmtp:18 annexb=no.
> a=rtpmap:101 telephone-event/8000.
> a=fmtp:101 0-15.
> a=sendrecv.
>  
> #
> U 2005/03/22 12:25:35.840762 10.3.0.221:5060 -> 216.229.127.60:5060
> SIP/2.0 100 trying -- your call is important to us.
> Via: SIP/2.0/UDP 216.229.127.60:5060;branch=z9hG4bK13feab54230-e59180e0.
> Via: SIP/2.0/UDP 216.229.118.76:4060;branch=z9hG4bK059b684ace3bac70.
> To: "Paul" <sip:3212514277 at 216.229.127.60>;tag=3384063503.
> From: sip:3219392336 at sip.mycompany.net;tag=0b8cd3ae.
> Call-ID: 1401520636 at 71.53.192.101.
> CSeq: 7361 INVITE.
> Content-Length: 0.
> .
>  
> #
> U 2005/03/22 12:25:35.840849 10.3.0.221:5060 -> 71.53.192.101:5060
> INVITE sip:3212514277 at 71.53.192.101:5060 SIP/2.0.
> Record-Route: <sip:10.3.0.221;ftag=0b8cd3ae;lr>.
> Via: SIP/2.0/UDP 10.3.0.221;branch=z9hG4bK33f9.e43cae62.0.
> Via: SIP/2.0/UDP 216.229.127.60:5060;branch=z9hG4bK13feab54230-e59180e0.
> Via: SIP/2.0/UDP 216.229.118.76:4060;branch=z9hG4bK059b684ace3bac70.
> To: "Paul" <sip:3212514277 at 216.229.127.60>;tag=3384063503.
> From: sip:3219392336 at sip.mycompany.net;tag=0b8cd3ae.
> Call-ID: 1401520636 at 71.53.192.101.
> CSeq: 7361 INVITE.
> Max-Forwards: 16.
> Contact: sip:3219392336 at 216.229.118.76:4060.
> Record-Route: <sip:216.229.127.60:5060;lr>.
> Allow: OPTIONS, INVITE, CANCEL, ACK, BYE, PRACK, INFO.
> Accept: multipart/mixed, application/sdp, application/isup, application/dtmf, application/dtmf-relay.
> Supported: timer.
> Session-Expires: 240;refresher=uac.
> Content-Disposition: session;handling=required.
> Content-Type: application/sdp.
> Content-Length: 248.
> P-hint: Loose Routed.
> P-hint: reINVITE.
> .
> v=0.
> o=Sonus_UAC 29190 4768 IN IP4 216.229.118.76.
> s=SIP Media Capabilities.
> c=IN IP4 216.229.118.101.
> t=0 0.
> m=audio 19110 RTP/AVP 18 101.
> a=rtpmap:18 G729/8000.
> a=fmtp:18 annexb=no.
> a=rtpmap:101 telephone-event/8000.
> a=fmtp:101 0-15.
> a=sendrecv.
>  
> #
> U 2005/03/22 12:25:36.117937 71.53.192.101:5060 -> 10.3.0.221:5060
> SIP/2.0 100 Trying.
> Via: SIP/2.0/UDP 10.3.0.221;branch=z9hG4bK33f9.e43cae62.0.
> Via: SIP/2.0/UDP 216.229.127.60:5060;branch=z9hG4bK13feab54230-e59180e0.
> Via: SIP/2.0/UDP 216.229.118.76:4060;branch=z9hG4bK059b684ace3bac70.
> From: <sip:3219392336 at sip.mycompany.net>;tag=0b8cd3ae.
> To: "Paul" <sip:3212514277 at 216.229.127.60>;tag=3384063503.
> Call-ID: 1401520636 at 71.53.192.101.
> CSeq: 7361 INVITE.
> Content-Length: 0.
> .
>  
> #
> U 2005/03/22 12:25:36.231264 71.53.192.101:5060 -> 10.3.0.221:5060
> SIP/2.0 200 OK.
> Via: SIP/2.0/UDP 10.3.0.221;branch=z9hG4bK33f9.e43cae62.0.
> Via: SIP/2.0/UDP 216.229.127.60:5060;branch=z9hG4bK13feab54230-e59180e0.
> Via: SIP/2.0/UDP 216.229.118.76:4060;branch=z9hG4bK059b684ace3bac70.
> Record-Route: <sip:10.3.0.221;ftag=0b8cd3ae;lr>.
> Record-Route: <sip:216.229.127.60:5060;lr>.
> From: <sip:3219392336 at sip.mycompany.net>;tag=0b8cd3ae.
> To: "Paul" <sip:3212514277 at 216.229.127.60>;tag=3384063503.
> Call-ID: 1401520636 at 71.53.192.101.
> CSeq: 7361 INVITE.
> Contact: <sip:3212514277 at 71.53.192.101:5060>.
> content-type: application/sdp.
> Allow: INVITE, ACK, OPTIONS, CANCEL, BYE.
> Content-Length:   184.
> .
> v=0.
> o=- 13175 3102 IN IP4 71.53.192.101.
> s=-.
> c=IN IP4 71.53.192.101.
> t=0 0.
> m=audio 13456 RTP/AVP 18 101.
> a=rtpmap:101 telephone-event/8000.
> a=fmtp:101 0-15.
> a=sendrecv.
> a=ptime:20.
>  
> #
> U 2005/03/22 12:25:36.231756 10.3.0.221:5060 -> 216.229.127.60:5060
> SIP/2.0 200 OK.
> Via: SIP/2.0/UDP 216.229.127.60:5060;branch=z9hG4bK13feab54230-e59180e0.
> Via: SIP/2.0/UDP 216.229.118.76:4060;branch=z9hG4bK059b684ace3bac70.
> Record-Route: <sip:10.3.0.221;ftag=0b8cd3ae;lr>.
> Record-Route: <sip:216.229.127.60:5060;lr>.
> From: <sip:3219392336 at sip.mycompany.net>;tag=0b8cd3ae.
> To: "Paul" <sip:3212514277 at 216.229.127.60>;tag=3384063503.
> Call-ID: 1401520636 at 71.53.192.101.
> CSeq: 7361 INVITE.
> Contact: <sip:3212514277 at 71.53.192.101:5060>.
> content-type: application/sdp.
> Allow: INVITE, ACK, OPTIONS, CANCEL, BYE.
> Content-Length:   184.
> .
> v=0.
> o=- 13175 3102 IN IP4 71.53.192.101.
> s=-.
> c=IN IP4 71.53.192.101.
> t=0 0.
> m=audio 13456 RTP/AVP 18 101.
> a=rtpmap:101 telephone-event/8000.
> a=fmtp:101 0-15.
> a=sendrecv.
> a=ptime:20.
>  
> #
> U 2005/03/22 12:25:36.327389 216.229.127.60:5060 -> 10.3.0.221:5060
> INVITE sip:3212514277 at 71.53.192.101:5060 SIP/2.0.
> Via: SIP/2.0/UDP 216.229.127.60:5060;branch=z9hG4bKac0cd476021-e59180e0.
> Via: SIP/2.0/UDP 216.229.118.76:4060;branch=z9hG4bK059b684ace3bac70.
> To: "Paul" <sip:3212514277 at 216.229.127.60>;tag=3384063503.
> From: sip:3219392336 at sip.mycompany.net;tag=0b8cd3ae.
> Call-ID: 1401520636 at 71.53.192.101.
> CSeq: 7361 INVITE.
> Max-Forwards: 69.
> Contact: sip:3219392336 at 216.229.118.76:4060.
> Record-Route: <sip:216.229.127.60:5060;lr>.
> Route: <sip:10.3.0.221:5060;ftag=3384063503;lr>.
> Allow: OPTIONS, INVITE, CANCEL, ACK, BYE, PRACK, INFO.
> Accept: multipart/mixed, application/sdp, application/isup, application/dtmf, application/dtmf-relay.
> Supported: timer.
> Session-Expires: 240;refresher=uac.
> Content-Disposition: session;handling=required.
> Content-Type: application/sdp.
> Content-Length: 248.
> .
> v=0.
> o=Sonus_UAC 29190 4768 IN IP4 216.229.118.76.
> s=SIP Media Capabilities.
> c=IN IP4 216.229.118.101.
> t=0 0.
> m=audio 19110 RTP/AVP 18 101.
> a=rtpmap:18 G729/8000.
> a=fmtp:18 annexb=no.
> a=rtpmap:101 telephone-event/8000.
> a=fmtp:101 0-15.
> a=sendrecv.
>  
> #
> U 2005/03/22 12:25:36.328039 10.3.0.221:5060 -> 216.229.127.60:5060
> SIP/2.0 100 trying -- your call is important to us.
> Via: SIP/2.0/UDP 216.229.127.60:5060;branch=z9hG4bKac0cd476021-e59180e0.
> Via: SIP/2.0/UDP 216.229.118.76:4060;branch=z9hG4bK059b684ace3bac70.
> To: "Paul" <sip:3212514277 at 216.229.127.60>;tag=3384063503.
> From: sip:3219392336 at sip.mycompany.net;tag=0b8cd3ae.
> Call-ID: 1401520636 at 71.53.192.101.
> CSeq: 7361 INVITE.
> Content-Length: 0.
> .
>  
> #
> U 2005/03/22 12:25:36.328139 10.3.0.221:5060 -> 71.53.192.101:5060
> INVITE sip:3212514277 at 71.53.192.101:5060 SIP/2.0.
> Record-Route: <sip:10.3.0.221;ftag=0b8cd3ae;lr>.
> Via: SIP/2.0/UDP 10.3.0.221;branch=z9hG4bK33f9.f43cae62.0.
> Via: SIP/2.0/UDP 216.229.127.60:5060;branch=z9hG4bKac0cd476021-e59180e0.
> Via: SIP/2.0/UDP 216.229.118.76:4060;branch=z9hG4bK059b684ace3bac70.
> To: "Paul" <sip:3212514277 at 216.229.127.60>;tag=3384063503.
> From: sip:3219392336 at sip.mycompany.net;tag=0b8cd3ae.
> Call-ID: 1401520636 at 71.53.192.101.
> CSeq: 7361 INVITE.
> Max-Forwards: 16.
> Contact: sip:3219392336 at 216.229.118.76:4060.
> Record-Route: <sip:216.229.127.60:5060;lr>.
> Allow: OPTIONS, INVITE, CANCEL, ACK, BYE, PRACK, INFO.
> Accept: multipart/mixed, application/sdp, application/isup, application/dtmf, application/dtmf-relay.
> Supported: timer.
> Session-Expires: 240;refresher=uac.
> Content-Disposition: session;handling=required.
> Content-Type: application/sdp.
> Content-Length: 248.
> P-hint: Loose Routed.
> P-hint: reINVITE.
> .
> v=0.
> o=Sonus_UAC 29190 4768 IN IP4 216.229.118.76.
> s=SIP Media Capabilities.
> c=IN IP4 216.229.118.101.
> t=0 0.
> m=audio 19110 RTP/AVP 18 101.
> a=rtpmap:18 G729/8000.
> a=fmtp:18 annexb=no.
> a=rtpmap:101 telephone-event/8000.
> a=fmtp:101 0-15.
> a=sendrecv.
>  
> #
> U 2005/03/22 12:25:36.333928 216.229.127.60:5060 -> 10.3.0.221:5060
> ACK sip:3212514277 at 71.53.192.101:5060 SIP/2.0.
> Via: SIP/2.0/UDP 216.229.127.60:5060;branch=z9hG4bK059b684ace3bac70.
> Via: SIP/2.0/UDP 216.229.118.76:4060;branch=z9hG4bK059b684ace3bac70.
> To: "Paul" <sip:3212514277 at 216.229.127.60>;tag=3384063503.
> From: sip:3219392336 at sip.mycompany.net;tag=0b8cd3ae.
> Call-ID: 1401520636 at 71.53.192.101.
> CSeq: 7361 ACK.
> Max-Forwards: 69.
> Record-Route: <sip:216.229.127.60:5060;lr>.
> Route: <sip:10.3.0.221:5060;ftag=3384063503;lr>.
> Content-Length: 0.
> .
>  
> #
> U 2005/03/22 12:25:36.334345 10.3.0.221:5060 -> 71.53.192.101:5060
> ACK sip:3212514277 at 71.53.192.101:5060 SIP/2.0.
> Record-Route: <sip:10.3.0.221;ftag=0b8cd3ae;lr>.
> Via: SIP/2.0/UDP 10.3.0.221;branch=0.
> Via: SIP/2.0/UDP 216.229.127.60:5060;branch=z9hG4bK059b684ace3bac70.
> Via: SIP/2.0/UDP 216.229.118.76:4060;branch=z9hG4bK059b684ace3bac70.
> To: "Paul" <sip:3212514277 at 216.229.127.60>;tag=3384063503.
> From: sip:3219392336 at sip.mycompany.net;tag=0b8cd3ae.
> Call-ID: 1401520636 at 71.53.192.101.
> CSeq: 7361 ACK.
> Max-Forwards: 16.
> Record-Route: <sip:216.229.127.60:5060;lr>.
> Content-Length: 0.
> P-hint: Loose Routed.
> P-hint: reINVITE.
> .
>  
> ##
> U 2005/03/22 12:25:36.676029 10.3.0.221:5060 -> 71.53.192.101:5060
> INVITE sip:3212514277 at 71.53.192.101:5060 SIP/2.0.
> Record-Route: <sip:10.3.0.221;ftag=0b8cd3ae;lr>.
> Via: SIP/2.0/UDP 10.3.0.221;branch=z9hG4bK33f9.f43cae62.0.
> Via: SIP/2.0/UDP 216.229.127.60:5060;branch=z9hG4bKac0cd476021-e59180e0.
> Via: SIP/2.0/UDP 216.229.118.76:4060;branch=z9hG4bK059b684ace3bac70.
> To: "Paul" <sip:3212514277 at 216.229.127.60>;tag=3384063503.
> From: sip:3219392336 at sip.mycompany.net;tag=0b8cd3ae.
> Call-ID: 1401520636 at 71.53.192.101.
> CSeq: 7361 INVITE.
> Max-Forwards: 16.
> Contact: sip:3219392336 at 216.229.118.76:4060.
> Record-Route: <sip:216.229.127.60:5060;lr>.
> Allow: OPTIONS, INVITE, CANCEL, ACK, BYE, PRACK, INFO.
> Accept: multipart/mixed, application/sdp, application/isup, application/dtmf, application/dtmf-relay.
> Supported: timer.
> Session-Expires: 240;refresher=uac.
> Content-Disposition: session;handling=required.
> Content-Type: application/sdp.
> Content-Length: 248.
> P-hint: Loose Routed.
> P-hint: reINVITE.
> .
> v=0.
> o=Sonus_UAC 29190 4768 IN IP4 216.229.118.76.
> s=SIP Media Capabilities.
> c=IN IP4 216.229.118.101.
> t=0 0.
> m=audio 19110 RTP/AVP 18 101.
> a=rtpmap:18 G729/8000.
> a=fmtp:18 annexb=no.
> a=rtpmap:101 telephone-event/8000.
> a=fmtp:101 0-15.
> a=sendrecv.
>  
> ##
> U 2005/03/22 12:25:38.696023 10.3.0.221:5060 -> 71.53.192.101:5060
> INVITE sip:3212514277 at 71.53.192.101:5060 SIP/2.0.
> Record-Route: <sip:10.3.0.221;ftag=0b8cd3ae;lr>.
> Via: SIP/2.0/UDP 10.3.0.221;branch=z9hG4bK33f9.f43cae62.0.
> Via: SIP/2.0/UDP 216.229.127.60:5060;branch=z9hG4bKac0cd476021-e59180e0.
> Via: SIP/2.0/UDP 216.229.118.76:4060;branch=z9hG4bK059b684ace3bac70.
> To: "Paul" <sip:3212514277 at 216.229.127.60>;tag=3384063503.
> From: sip:3219392336 at sip.mycompany.net;tag=0b8cd3ae.
> Call-ID: 1401520636 at 71.53.192.101.
> CSeq: 7361 INVITE.
> Max-Forwards: 16.
> Contact: sip:3219392336 at 216.229.118.76:4060.
> Record-Route: <sip:216.229.127.60:5060;lr>.
> Allow: OPTIONS, INVITE, CANCEL, ACK, BYE, PRACK, INFO.
> Accept: multipart/mixed, application/sdp, application/isup, application/dtmf, application/dtmf-relay.
> Supported: timer.
> Session-Expires: 240;refresher=uac.
> Content-Disposition: session;handling=required.
> Content-Type: application/sdp.
> Content-Length: 248.
> P-hint: Loose Routed.
> P-hint: reINVITE.
> .
> v=0.
> o=Sonus_UAC 29190 4768 IN IP4 216.229.118.76.
> s=SIP Media Capabilities.
> c=IN IP4 216.229.118.101.
> t=0 0.
> m=audio 19110 RTP/AVP 18 101.
> a=rtpmap:18 G729/8000.
> a=fmtp:18 annexb=no.
> a=rtpmap:101 telephone-event/8000.
> a=fmtp:101 0-15.
> a=sendrecv.
>  
> ###
> U 2005/03/22 12:25:42.736054 10.3.0.221:5060 -> 71.53.192.101:5060
> INVITE sip:3212514277 at 71.53.192.101:5060 SIP/2.0.
> Record-Route: <sip:10.3.0.221;ftag=0b8cd3ae;lr>.
> Via: SIP/2.0/UDP 10.3.0.221;branch=z9hG4bK33f9.f43cae62.0.
> Via: SIP/2.0/UDP 216.229.127.60:5060;branch=z9hG4bKac0cd476021-e59180e0.
> Via: SIP/2.0/UDP 216.229.118.76:4060;branch=z9hG4bK059b684ace3bac70.
> To: "Paul" <sip:3212514277 at 216.229.127.60>;tag=3384063503.
> From: sip:3219392336 at sip.mycompany.net;tag=0b8cd3ae.
> Call-ID: 1401520636 at 71.53.192.101.
> CSeq: 7361 INVITE.
> Max-Forwards: 16.
> Contact: sip:3219392336 at 216.229.118.76:4060.
> Record-Route: <sip:216.229.127.60:5060;lr>.
> Allow: OPTIONS, INVITE, CANCEL, ACK, BYE, PRACK, INFO.
> Accept: multipart/mixed, application/sdp, application/isup, application/dtmf, application/dtmf-relay.
> Supported: timer.
> Session-Expires: 240;refresher=uac.
> Content-Disposition: session;handling=required.
> Content-Type: application/sdp.
> Content-Length: 248.
> P-hint: Loose Routed.
> P-hint: reINVITE.
> .
> v=0.
> o=Sonus_UAC 29190 4768 IN IP4 216.229.118.76.
> s=SIP Media Capabilities.
> c=IN IP4 216.229.118.101.
> t=0 0.
> m=audio 19110 RTP/AVP 18 101.
> a=rtpmap:18 G729/8000.
> a=fmtp:18 annexb=no.
> a=rtpmap:101 telephone-event/8000.
> a=fmtp:101 0-15.
> a=sendrecv.
>  
> #
> U 2005/03/22 12:25:46.776026 10.3.0.221:5060 -> 71.53.192.101:5060
> INVITE sip:3212514277 at 71.53.192.101:5060 SIP/2.0.
> Record-Route: <sip:10.3.0.221;ftag=0b8cd3ae;lr>.
> Via: SIP/2.0/UDP 10.3.0.221;branch=z9hG4bK33f9.f43cae62.0.
> Via: SIP/2.0/UDP 216.229.127.60:5060;branch=z9hG4bKac0cd476021-e59180e0.
> Via: SIP/2.0/UDP 216.229.118.76:4060;branch=z9hG4bK059b684ace3bac70.
> To: "Paul" <sip:3212514277 at 216.229.127.60>;tag=3384063503.
> From: sip:3219392336 at sip.mycompany.net;tag=0b8cd3ae.
> Call-ID: 1401520636 at 71.53.192.101.
> CSeq: 7361 INVITE.
> Max-Forwards: 16.
> Contact: sip:3219392336 at 216.229.118.76:4060.
> Record-Route: <sip:216.229.127.60:5060;lr>.
> Allow: OPTIONS, INVITE, CANCEL, ACK, BYE, PRACK, INFO.
> Accept: multipart/mixed, application/sdp, application/isup, application/dtmf, application/dtmf-relay.
> Supported: timer.
> Session-Expires: 240;refresher=uac.
> Content-Disposition: session;handling=required.
> Content-Type: application/sdp.
> Content-Length: 248.
> P-hint: Loose Routed.
> P-hint: reINVITE.
> .
> v=0.
> o=Sonus_UAC 29190 4768 IN IP4 216.229.118.76.
> s=SIP Media Capabilities.
> c=IN IP4 216.229.118.101.
> t=0 0.
> m=audio 19110 RTP/AVP 18 101.
> a=rtpmap:18 G729/8000.
> a=fmtp:18 annexb=no.
> a=rtpmap:101 telephone-event/8000.
> a=fmtp:101 0-15.
> a=sendrecv.
>  
> ###
> U 2005/03/22 12:25:50.816030 10.3.0.221:5060 -> 71.53.192.101:5060
> INVITE sip:3212514277 at 71.53.192.101:5060 SIP/2.0.
> Record-Route: <sip:10.3.0.221;ftag=0b8cd3ae;lr>.
> Via: SIP/2.0/UDP 10.3.0.221;branch=z9hG4bK33f9.f43cae62.0.
> Via: SIP/2.0/UDP 216.229.127.60:5060;branch=z9hG4bKac0cd476021-e59180e0.
> Via: SIP/2.0/UDP 216.229.118.76:4060;branch=z9hG4bK059b684ace3bac70.
> To: "Paul" <sip:3212514277 at 216.229.127.60>;tag=3384063503.
> From: sip:3219392336 at sip.mycompany.net;tag=0b8cd3ae.
> Call-ID: 1401520636 at 71.53.192.101.
> CSeq: 7361 INVITE.
> Max-Forwards: 16.
> Contact: sip:3219392336 at 216.229.118.76:4060.
> Record-Route: <sip:216.229.127.60:5060;lr>.
> Allow: OPTIONS, INVITE, CANCEL, ACK, BYE, PRACK, INFO.
> Accept: multipart/mixed, application/sdp, application/isup, application/dtmf, application/dtmf-relay.
> Supported: timer.
> Session-Expires: 240;refresher=uac.
> Content-Disposition: session;handling=required.
> Content-Type: application/sdp.
> Content-Length: 248.
> P-hint: Loose Routed.
> P-hint: reINVITE.
> .
> v=0.
> o=Sonus_UAC 29190 4768 IN IP4 216.229.118.76.
> s=SIP Media Capabilities.
> c=IN IP4 216.229.118.101.
> t=0 0.
> m=audio 19110 RTP/AVP 18 101.
> a=rtpmap:18 G729/8000.
> a=fmtp:18 annexb=no.
> a=rtpmap:101 telephone-event/8000.
> a=fmtp:101 0-15.
> a=sendrecv.
>  
> ###################
> U 2005/03/22 12:25:54.856039 10.3.0.221:5060 -> 71.53.192.101:5060
> INVITE sip:3212514277 at 71.53.192.101:5060 SIP/2.0.
> Record-Route: <sip:10.3.0.221;ftag=0b8cd3ae;lr>.
> Via: SIP/2.0/UDP 10.3.0.221;branch=z9hG4bK33f9.f43cae62.0.
> Via: SIP/2.0/UDP 216.229.127.60:5060;branch=z9hG4bKac0cd476021-e59180e0.
> Via: SIP/2.0/UDP 216.229.118.76:4060;branch=z9hG4bK059b684ace3bac70.
> To: "Paul" <sip:3212514277 at 216.229.127.60>;tag=3384063503.
> From: sip:3219392336 at sip.mycompany.net;tag=0b8cd3ae.
> Call-ID: 1401520636 at 71.53.192.101.
> CSeq: 7361 INVITE.
> Max-Forwards: 16.
> Contact: sip:3219392336 at 216.229.118.76:4060.
> Record-Route: <sip:216.229.127.60:5060;lr>.
> Allow: OPTIONS, INVITE, CANCEL, ACK, BYE, PRACK, INFO.
> Accept: multipart/mixed, application/sdp, application/isup, application/dtmf, application/dtmf-relay.
> Supported: timer.
> Session-Expires: 240;refresher=uac.
> Content-Disposition: session;handling=required.
> Content-Type: application/sdp.
> Content-Length: 248.
> P-hint: Loose Routed.
> P-hint: reINVITE.
> .
> v=0.
> o=Sonus_UAC 29190 4768 IN IP4 216.229.118.76.
> s=SIP Media Capabilities.
> c=IN IP4 216.229.118.101.
> t=0 0.
> m=audio 19110 RTP/AVP 18 101.
> a=rtpmap:18 G729/8000.
> a=fmtp:18 annexb=no.
> a=rtpmap:101 telephone-event/8000.
> a=fmtp:101 0-15.
> a=sendrecv.
>  
> ##
> U 2005/03/22 12:25:57.886157 10.3.0.221:5060 -> 216.229.127.60:5060
> SIP/2.0 408 Request Timeout.
> Via: SIP/2.0/UDP 216.229.127.60:5060;branch=z9hG4bKac0cd476021-e59180e0.
> Via: SIP/2.0/UDP 216.229.118.76:4060;branch=z9hG4bK059b684ace3bac70.
> To: "Paul" <sip:3212514277 at 216.229.127.60>;tag=3384063503.
> From: sip:3219392336 at sip.mycompany.net;tag=0b8cd3ae.
> Call-ID: 1401520636 at 71.53.192.101.
> CSeq: 7361 INVITE.
> Content-Length: 0.
> .
>  
> ##
> U 2005/03/22 12:25:57.925977 216.229.127.60:5060 -> 10.3.0.221:5060
> ACK sip:3212514277 at 71.53.192.101:5060 SIP/2.0.
> Via: SIP/2.0/UDP 216.229.127.60:5060;branch=z9hG4bKac0cd476021-e59180e0.
> To: "Paul" <sip:3212514277 at 216.229.127.60>;tag=3384063503.
> From: sip:3219392336 at sip.mycompany.net;tag=0b8cd3ae.
> Call-ID: 1401520636 at 71.53.192.101.
> CSeq: 7361 ACK.
> Route: <sip:10.3.0.221:5060;ftag=3384063503;lr>.
> Content-Length: 0.
> .
>  
> #
> U 2005/03/22 12:25:57.942385 216.229.127.60:5060 -> 10.3.0.221:5060
> BYE sip:3212514277 at 71.53.192.101:5060 SIP/2.0.
> Via: SIP/2.0/UDP 216.229.127.60:5060;branch=z9hG4bK86edc343bce-13148c23.
> Via: SIP/2.0/UDP 216.229.118.76:4060;branch=z9hG4bK059d4a0ece3bac70.
> To: "Paul" <sip:3212514277 at 216.229.127.60>;tag=3384063503.
> From: sip:3219392336 at sip.mycompany.net;tag=0b8cd3ae.
> Call-ID: 1401520636 at 71.53.192.101.
> CSeq: 7362 BYE.
> Max-Forwards: 69.
> Record-Route: <sip:216.229.127.60:5060;lr>.
> Route: <sip:10.3.0.221:5060;ftag=3384063503;lr>.
> Supported: 100rel, timer.
> Content-Length: 0.
> .
>  
> #
> U 2005/03/22 12:25:57.943998 10.3.0.221:5060 -> 71.53.192.101:5060
> BYE sip:3212514277 at 71.53.192.101:5060 SIP/2.0.
> Record-Route: <sip:10.3.0.221;ftag=0b8cd3ae;lr>.
> Via: SIP/2.0/UDP 10.3.0.221;branch=z9hG4bK03f9.5ae311b1.0.
> Via: SIP/2.0/UDP 216.229.127.60:5060;branch=z9hG4bK86edc343bce-13148c23.
> Via: SIP/2.0/UDP 216.229.118.76:4060;branch=z9hG4bK059d4a0ece3bac70.
> To: "Paul" <sip:3212514277 at 216.229.127.60>;tag=3384063503.
> From: sip:3219392336 at sip.mycompany.net;tag=0b8cd3ae.
> Call-ID: 1401520636 at 71.53.192.101.
> CSeq: 7362 BYE.
> Max-Forwards: 16.
> Record-Route: <sip:216.229.127.60:5060;lr>.
> Supported: 100rel, timer.
> Content-Length: 0.
> P-hint: Loose Routed.
> .
>  
> #
> U 2005/03/22 12:25:58.115313 71.53.192.101:5060 -> 10.3.0.221:5060
> SIP/2.0 200 OK.
> Via: SIP/2.0/UDP 10.3.0.221;branch=z9hG4bK03f9.5ae311b1.0.
> Via: SIP/2.0/UDP 216.229.127.60:5060;branch=z9hG4bK86edc343bce-13148c23.
> Via: SIP/2.0/UDP 216.229.118.76:4060;branch=z9hG4bK059d4a0ece3bac70.
> From: <sip:3219392336 at sip.mycompany.net>;tag=0b8cd3ae.
> To: "Paul" <sip:3212514277 at 216.229.127.60>;tag=3384063503.
> Call-ID: 1401520636 at 71.53.192.101.
> CSeq: 7362 BYE.
> Content-Length: 0.
> .
>  
> #
> U 2005/03/22 12:25:58.115578 10.3.0.221:5060 -> 216.229.127.60:5060
> SIP/2.0 200 OK.
> Via: SIP/2.0/UDP 216.229.127.60:5060;branch=z9hG4bK86edc343bce-13148c23.
> Via: SIP/2.0/UDP 216.229.118.76:4060;branch=z9hG4bK059d4a0ece3bac70.
> From: <sip:3219392336 at sip.mycompany.net>;tag=0b8cd3ae.
> To: "Paul" <sip:3212514277 at 216.229.127.60>;tag=3384063503.
> Call-ID: 1401520636 at 71.53.192.101.
> CSeq: 7362 BYE.
> Content-Length: 0.
> .

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