[Serusers] Who is violating SIP protocol here, SER or voice-ISP?

Thu Oct 7 20:20:08 CEST 2004

There are several issues:
1. Your termination provider uses asymetric signaling: it sends packets 
from port 29436, but assumes to receive packets at port 5060. This is 
fine, no violation. If you take a look at the Contact: header in the 183 
and 200 response from Masergy, you can see that it announces port 5060 
to receive SIP messages.

2. You are using rewrite_contact in your ser.cfg. This is necessary to 
rewrite the Contact: header. This works only if the SIP UAs support 
symmetric signaling. As Masergy does not support symetric signaling you 
must not do 'rewrite_contact' on messages from Masergy.

Solution: use rewrite_contact only on messages which come from your 
clients, not on messages from Masergy.

regards,
klaus

Jeremy M. Dolan wrote:
> I will attach a full SIP conversation to this e-mail, but here is the
> summary of what seems to be happening.
> 
> I place a call from my phone here, behind NAT. This contacts a SER
> server with nathelper/rtpproxy out on the 'net, which then forwards
> the requests to Masergy (www.masergy.com), who provide us with LD VoIP
> service. Everything proceeds fine until the "OK" reply from Masergy
> signalling the call has been answered. Here's the transaction there:
> 
>    Masergy port 29436 -> SER port 5060 "OK"
>    SER port 5060 -> My Phone port 5060 "OK"
>    My Phone port 5060 -> SER port 5060 "ACK"
>    SER port 5060 -> Masergy port 29436 "ACK"
> 
> Masergy never receives that last packet.
> 
> However, my phone receives all of the information it needs to establish
> the RTP connection. It does so, and the call appears to be working fine.
> Meanwhile, Masergy's SIP server continues to resend "SIP/2.0 200 OK"
> messages (still from port 29436) every few seconds, waiting for a reply.
> After ~35 seconds of not hearing back, it assumes the worst and sends a
> "BYE", tearing down a call that was going swell, as far as the two
> humans involved were concerned.
> 
> I've spoken with the relevant tech at Masergy, and their determination
> is that our SIP proxy should be sending all SIP traffic to port 5060, 
> regardless of what they may be transmitting from.
> 
> I just built the very latest CVS version of SER (0.8.99-dev8), and am
> seeing the same behavior. Is this a protocol violation on either side?
> (Transmitting to a non-5060 port, or not listening for a reply on a
> port that was just transmitted from). Is there a way to force SER to
> always use 5060? (Which itself probably breaks protocol for some
> cases, which we aren't currently dealing with).
> 
> Thank you for any info.
> 
> Jeremy
> 
> 
> 
> ------------------------------------------------------------------------
> 
> This trace was created with ngrep:
>    ./ngrep -W byline -t -v 'Unauthorized|REGISTER' port 5060 > output
> 
> Phone numbers and IP addresses have been changed to protect the guilty:
>    192.168.0.10 = my phone's IP (1918 address)
>    1.1.1.1 = my firewall's IP (where SER would see my traffic coming from)
>    2.2.2.2 = SER server's IP
>    8.8.8.8 = Masergy's SIP signalling server
>    9.9.9.9 = (one of) Masergy's RTP media servers (seen only in SDP packets)
>    4445555555 = SIP phone's phone number
>    6667777777 = PSTN phone number being called
>    
> 
> interface: eth0 (2.2.2.0/255.255.255.128)
> filter: ip and ( port 5060 )
> don't match: Unauthorized|REGISTER
> #############
> U 2004/10/07 10:42:31.500815 1.1.1.1:5060 -> 2.2.2.2:5060
> INVITE sip:6667777777 at 2.2.2.2;user=phone SIP/2.0.
> Via: SIP/2.0/UDP 192.168.0.10:5060;branch=z9hG4bK4057b0b1.
> From: "User" <sip:4445555555 at 2.2.2.2>;tag=000f902b48ef00092bde0f52-44bd25ec.
> To: <sip:6667777777 at 2.2.2.2;user=phone>.
> Call-ID: 000f902b-48ef000b-389b653d-796379fe at 192.168.0.10.
> Date: Thu, 07 Oct 2004 15:46:20 GMT.
> CSeq: 101 INVITE.
> User-Agent: CSCO/6.
> Contact: <sip:4445555555 at 192.168.0.10:5060>.
> Expires: 180.
> Content-Type: application/sdp.
> Content-Length: 249.
> Accept: application/sdp.
> .
> v=0.
> o=Cisco-SIPUA 27241 24599 IN IP4 192.168.0.10.
> s=SIP Call.
> c=IN IP4 192.168.0.10.
> t=0 0.
> m=audio 25432 RTP/AVP 0 8 18 101.
> a=rtpmap:0 PCMU/8000.
> a=rtpmap:8 PCMA/8000.
> a=rtpmap:18 G729/8000.
> a=rtpmap:101 telephone-event/8000.
> a=fmtp:101 0-15.
> 
> #
> U 2004/10/07 10:42:31.510470 2.2.2.2:5060 -> 1.1.1.1:5060
> SIP/2.0 100 trying -- your call is important to us.
> Via: SIP/2.0/UDP 192.168.0.10:5060;branch=z9hG4bK4057b0b1;rport=5060;received=1.1.1.1.
> From: "User" <sip:4445555555 at 2.2.2.2>;tag=000f902b48ef00092bde0f52-44bd25ec.
> To: <sip:6667777777 at 2.2.2.2;user=phone>.
> Call-ID: 000f902b-48ef000b-389b653d-796379fe at 192.168.0.10.
> CSeq: 101 INVITE.
> Server: Sip EXpress router (0.8.99-dev8 (i386/linux)).
> Content-Length: 0.
> Warning: 392 2.2.2.2:5060 "Noisy feedback tells:  pid=12364 req_src_ip=1.1.1.1 req_src_port=5060 in_uri=sip:6667777777 at 64.47.100.23;user=phone out_uri=sip:17732719830 at 8.8.8.8:5060;user=phone via_cnt==1".
> .
> 
> #
> U 2004/10/07 10:42:31.510621 2.2.2.2:5060 -> 8.8.8.8:5060
> INVITE sip:16667777777 at 8.8.8.8:5060;user=phone SIP/2.0.
> Max-Forwards: 10.
> Record-Route: <sip:2.2.2.2;ftag=000f902b48ef00092bde0f52-44bd25ec;lr=on>.
> Via: SIP/2.0/UDP 2.2.2.2;branch=z9hG4bKc4b2.5492f2f6.0.
> Via: SIP/2.0/UDP 192.168.0.10:5060;rport=5060;received=1.1.1.1;branch=z9hG4bK4057b0b1.
> From: "User" <sip:4445555555 at 2.2.2.2>;tag=000f902b48ef00092bde0f52-44bd25ec.
> To: <sip:6667777777 at 2.2.2.2;user=phone>.
> Call-ID: 000f902b-48ef000b-389b653d-796379fe at 192.168.0.10.
> Date: Thu, 07 Oct 2004 15:46:20 GMT.
> CSeq: 101 INVITE.
> User-Agent: CSCO/6.
> Contact: <sip:4445555555 at 1.1.1.1:5060>.
> Expires: 180.
> Content-Type: application/sdp.
> Content-Length: 266.
> Accept: application/sdp.
> .
> v=0.
> o=Cisco-SIPUA 27241 24599 IN IP4 192.168.0.10.
> s=SIP Call.
> c=IN IP4 2.2.2.2.
> t=0 0.
> m=audio 35018 RTP/AVP 0 8 18 101.
> a=rtpmap:0 PCMU/8000.
> a=rtpmap:8 PCMA/8000.
> a=rtpmap:18 G729/8000.
> a=rtpmap:101 telephone-event/8000.
> a=fmtp:101 0-15.
> a=nortpproxy:yes.
> 
> #
> U 2004/10/07 10:42:31.568787 8.8.8.8:29430 -> 2.2.2.2:5060
> SIP/2.0 100 Trying.
> Via: SIP/2.0/UDP 2.2.2.2;branch=z9hG4bKc4b2.5492f2f6.0.
> Via: SIP/2.0/UDP 192.168.0.10:5060;rport=5060;received=1.1.1.1;branch=z9hG4bK4057b0b1.
> From: "User" <sip:4445555555 at 2.2.2.2>;tag=000f902b48ef00092bde0f52-44bd25ec.
> To: <sip:6667777777 at 2.2.2.2;user=phone>.
> Call-ID: 000f902b-48ef000b-389b653d-796379fe at 192.168.0.10.
> CSeq: 101 INVITE.
> Content-Length: 0.
> .
> 
> #
> U 2004/10/07 10:42:31.687397 2.2.2.2:5060 -> 1.1.1.1:5060
> ....
> #
> U 2004/10/07 10:42:31.835105 8.8.8.8:29430 -> 2.2.2.2:5060
> SIP/2.0 183 Session Progress.
> To: <sip:6667777777 at 2.2.2.2;user=phone>.
> From: "User" <sip:4445555555 at 2.2.2.2>;tag=000f902b48ef00092bde0f52-44bd25ec.
> Call-ID: 000f902b-48ef000b-389b653d-796379fe at 192.168.0.10.
> CSeq: 101 INVITE.
> Contact: sip:16667777777 at 8.8.8.8:5060.
> Content-Type: application/sdp.
> Via: SIP/2.0/UDP 2.2.2.2;branch=z9hG4bKc4b2.5492f2f6.0.
> Via: SIP/2.0/UDP 192.168.0.10:5060;rport=5060;received=1.1.1.1;branch=z9hG4bK4057b0b1.
> Content-Length: 157.
> .
> v=0.
> o=esv1.dfwi.masergy.net 1234 16934 IN IP4 9.9.9.9.
> s=sip call.
> c=IN IP4 9.9.9.9.
> t=0 0.
> m=audio 6376 RTP/AVP 0.
> a=rtpmap:0 PCMU/8000.
> a=sendrecv.
> 
> #
> U 2004/10/07 10:42:31.835856 2.2.2.2:5060 -> 1.1.1.1:5060
> SIP/2.0 183 Session Progress.
> To: <sip:6667777777 at 2.2.2.2;user=phone>.
> From: "User" <sip:4445555555 at 2.2.2.2>;tag=000f902b48ef00092bde0f52-44bd25ec.
> Call-ID: 000f902b-48ef000b-389b653d-796379fe at 192.168.0.10.
> CSeq: 101 INVITE.
> Contact: sip:16667777777 at 8.8.8.8:29430.
> Content-Type: application/sdp.
> Via: SIP/2.0/UDP 192.168.0.10:5060;rport=5060;received=1.1.1.1;branch=z9hG4bK4057b0b1.
> Content-Length: 178.
> .
> v=0.
> o=esv1.dfwi.masergy.net 1234 16934 IN IP4 9.9.9.9.
> s=sip call.
> c=IN IP4 2.2.2.2.
> t=0 0.
> m=audio 35020 RTP/AVP 0.
> a=rtpmap:0 PCMU/8000.
> a=sendrecv.
> a=nortpproxy:yes.
> 
> #
> U 2004/10/07 10:42:36.335312 8.8.8.8:29436 -> 2.2.2.2:5060
> SIP/2.0 200 OK.
> To: <sip:6667777777 at 2.2.2.2;user=phone>;tag=3306152785-310961.
> From: "User" <sip:4445555555 at 2.2.2.2>;tag=000f902b48ef00092bde0f52-44bd25ec.
> Call-ID: 000f902b-48ef000b-389b653d-796379fe at 192.168.0.10.
> CSeq: 101 INVITE.
> Contact: sip:16667777777 at 8.8.8.8:5060.
> Content-Type: application/sdp.
> Via: SIP/2.0/UDP 2.2.2.2;branch=z9hG4bKc4b2.5492f2f6.0.
> Via: SIP/2.0/UDP 192.168.0.10:5060;rport=5060;received=1.1.1.1;branch=z9hG4bK4057b0b1.
> Record-Route: <sip:2.2.2.2;ftag=000f902b48ef00092bde0f52-44bd25ec;lr=on>.
> Content-Length: 157.
> .
> v=0.
> o=esv1.dfwi.masergy.net 1234 16934 IN IP4 9.9.9.9.
> s=sip call.
> c=IN IP4 9.9.9.9.
> t=0 0.
> m=audio 6376 RTP/AVP 0.
> a=rtpmap:0 PCMU/8000.
> a=sendrecv.
> 
> #
> U 2004/10/07 10:42:36.336250 2.2.2.2:5060 -> 1.1.1.1:5060
> SIP/2.0 200 OK.
> To: <sip:6667777777 at 2.2.2.2;user=phone>;tag=3306152785-310961.
> From: "User" <sip:4445555555 at 2.2.2.2>;tag=000f902b48ef00092bde0f52-44bd25ec.
> Call-ID: 000f902b-48ef000b-389b653d-796379fe at 192.168.0.10.
> CSeq: 101 INVITE.
> Contact: sip:16667777777 at 8.8.8.8:29436.
> Content-Type: application/sdp.
> Via: SIP/2.0/UDP 192.168.0.10:5060;rport=5060;received=1.1.1.1;branch=z9hG4bK4057b0b1.
> Record-Route: <sip:2.2.2.2;ftag=000f902b48ef00092bde0f52-44bd25ec;lr=on>.
> Content-Length: 178.
> .
> v=0.
> o=esv1.dfwi.masergy.net 1234 16934 IN IP4 9.9.9.9.
> s=sip call.
> c=IN IP4 2.2.2.2.
> t=0 0.
> m=audio 35020 RTP/AVP 0.
> a=rtpmap:0 PCMU/8000.
> a=sendrecv.
> a=nortpproxy:yes.
> 
> #
> U 2004/10/07 10:42:36.518975 1.1.1.1:5060 -> 2.2.2.2:5060
> ACK sip:2.2.2.2:5060;ftag=000f902b48ef00092bde0f52-44bd25ec;lr=on SIP/2.0.
> Via: SIP/2.0/UDP 192.168.0.10:5060;branch=z9hG4bK3d28987e.
> From: "User" <sip:4445555555 at 2.2.2.2>;tag=000f902b48ef00092bde0f52-44bd25ec.
> To: <sip:6667777777 at 2.2.2.2;user=phone>;tag=3306152785-310961.
> Call-ID: 000f902b-48ef000b-389b653d-796379fe at 192.168.0.10.
> Date: Thu, 07 Oct 2004 15:46:25 GMT.
> CSeq: 101 ACK.
> User-Agent: CSCO/6.
> Route: <sip:16667777777 at 8.8.8.8:29436>.
> Content-Length: 0.
> .
> 
> #
> U 2004/10/07 10:42:36.520741 2.2.2.2:5060 -> 8.8.8.8:29436
> ACK sip:16667777777 at 8.8.8.8:29436 SIP/2.0.
> Max-Forwards: 10.
> Record-Route: <sip:2.2.2.2;ftag=000f902b48ef00092bde0f52-44bd25ec;lr=on>.
> Via: SIP/2.0/UDP 2.2.2.2;branch=0.
> Via: SIP/2.0/UDP 192.168.0.10:5060;rport=5060;received=1.1.1.1;branch=z9hG4bK3d28987e.
> From: "User" <sip:4445555555 at 2.2.2.2>;tag=000f902b48ef00092bde0f52-44bd25ec.
> To: <sip:6667777777 at 2.2.2.2;user=phone>;tag=3306152785-310961.
> Call-ID: 000f902b-48ef000b-389b653d-796379fe at 192.168.0.10.
> Date: Thu, 07 Oct 2004 15:46:25 GMT.
> CSeq: 101 ACK.
> User-Agent: CSCO/6.
> Content-Length: 0.
> .
> 
> #
> U 2004/10/07 10:42:36.840296 8.8.8.8:29436 -> 2.2.2.2:5060
> SIP/2.0 200 OK.
> To: <sip:6667777777 at 2.2.2.2;user=phone>;tag=3306152785-310961.
> From: "User" <sip:4445555555 at 2.2.2.2>;tag=000f902b48ef00092bde0f52-44bd25ec.
> Call-ID: 000f902b-48ef000b-389b653d-796379fe at 192.168.0.10.
> CSeq: 101 INVITE.
> Contact: sip:16667777777 at 8.8.8.8:5060.
> Content-Type: application/sdp.
> Via: SIP/2.0/UDP 2.2.2.2;branch=z9hG4bKc4b2.5492f2f6.0.
> Via: SIP/2.0/UDP 192.168.0.10:5060;rport=5060;received=1.1.1.1;branch=z9hG4bK4057b0b1.
> Record-Route: <sip:2.2.2.2;ftag=000f902b48ef00092bde0f52-44bd25ec;lr=on>.
> Content-Length: 157.
> .
> v=0.
> o=esv1.dfwi.masergy.net 1234 16934 IN IP4 9.9.9.9.
> s=sip call.
> c=IN IP4 9.9.9.9.
> t=0 0.
> m=audio 6376 RTP/AVP 0.
> a=rtpmap:0 PCMU/8000.
> a=sendrecv.
> 
> #
> U 2004/10/07 10:42:36.841030 2.2.2.2:5060 -> 1.1.1.1:5060
> SIP/2.0 200 OK.
> To: <sip:6667777777 at 2.2.2.2;user=phone>;tag=3306152785-310961.
> From: "User" <sip:4445555555 at 2.2.2.2>;tag=000f902b48ef00092bde0f52-44bd25ec.
> Call-ID: 000f902b-48ef000b-389b653d-796379fe at 192.168.0.10.
> CSeq: 101 INVITE.
> Contact: sip:16667777777 at 8.8.8.8:29436.
> Content-Type: application/sdp.
> Via: SIP/2.0/UDP 192.168.0.10:5060;rport=5060;received=1.1.1.1;branch=z9hG4bK4057b0b1.
> Record-Route: <sip:2.2.2.2;ftag=000f902b48ef00092bde0f52-44bd25ec;lr=on>.
> Content-Length: 178.
> .
> v=0.
> o=esv1.dfwi.masergy.net 1234 16934 IN IP4 9.9.9.9.
> s=sip call.
> c=IN IP4 2.2.2.2.
> t=0 0.
> m=audio 35020 RTP/AVP 0.
> a=rtpmap:0 PCMU/8000.
> a=sendrecv.
> a=nortpproxy:yes.
> 
> #
> U 2004/10/07 10:42:36.933976 1.1.1.1:5060 -> 2.2.2.2:5060
> ACK sip:2.2.2.2:5060;ftag=000f902b48ef00092bde0f52-44bd25ec;lr=on SIP/2.0.
> Via: SIP/2.0/UDP 192.168.0.10:5060;branch=z9hG4bK3d28987e.
> From: "User" <sip:4445555555 at 2.2.2.2>;tag=000f902b48ef00092bde0f52-44bd25ec.
> To: <sip:6667777777 at 2.2.2.2;user=phone>;tag=3306152785-310961.
> Call-ID: 000f902b-48ef000b-389b653d-796379fe at 192.168.0.10.
> Date: Thu, 07 Oct 2004 15:46:25 GMT.
> CSeq: 101 ACK.
> User-Agent: CSCO/6.
> Route: <sip:16667777777 at 8.8.8.8:29436>.
> Content-Length: 0.
> .
> 
> #
> U 2004/10/07 10:42:36.934396 2.2.2.2:5060 -> 8.8.8.8:29436
> ACK sip:16667777777 at 8.8.8.8:29436 SIP/2.0.
> Max-Forwards: 10.
> Record-Route: <sip:2.2.2.2;ftag=000f902b48ef00092bde0f52-44bd25ec;lr=on>.
> Via: SIP/2.0/UDP 2.2.2.2;branch=0.
> Via: SIP/2.0/UDP 192.168.0.10:5060;rport=5060;received=1.1.1.1;branch=z9hG4bK3d28987e.
> From: "User" <sip:4445555555 at 2.2.2.2>;tag=000f902b48ef00092bde0f52-44bd25ec.
> To: <sip:6667777777 at 2.2.2.2;user=phone>;tag=3306152785-310961.
> Call-ID: 000f902b-48ef000b-389b653d-796379fe at 192.168.0.10.
> Date: Thu, 07 Oct 2004 15:46:25 GMT.
> CSeq: 101 ACK.
> User-Agent: CSCO/6.
> Content-Length: 0.
> .
> 
> #
> U 2004/10/07 10:42:37.840199 8.8.8.8:29436 -> 2.2.2.2:5060
> SIP/2.0 200 OK.
> To: <sip:6667777777 at 2.2.2.2;user=phone>;tag=3306152785-310961.
> From: "User" <sip:4445555555 at 2.2.2.2>;tag=000f902b48ef00092bde0f52-44bd25ec.
> Call-ID: 000f902b-48ef000b-389b653d-796379fe at 192.168.0.10.
> CSeq: 101 INVITE.
> Contact: sip:16667777777 at 8.8.8.8:5060.
> Content-Type: application/sdp.
> Via: SIP/2.0/UDP 2.2.2.2;branch=z9hG4bKc4b2.5492f2f6.0.
> Via: SIP/2.0/UDP 192.168.0.10:5060;rport=5060;received=1.1.1.1;branch=z9hG4bK4057b0b1.
> Record-Route: <sip:2.2.2.2;ftag=000f902b48ef00092bde0f52-44bd25ec;lr=on>.
> Content-Length: 157.
> .
> v=0.
> o=esv1.dfwi.masergy.net 1234 16934 IN IP4 9.9.9.9.
> s=sip call.
> c=IN IP4 9.9.9.9.
> t=0 0.
> m=audio 6376 RTP/AVP 0.
> a=rtpmap:0 PCMU/8000.
> a=sendrecv.
> 
> #
> U 2004/10/07 10:42:37.840989 2.2.2.2:5060 -> 1.1.1.1:5060
> SIP/2.0 200 OK.
> To: <sip:6667777777 at 2.2.2.2;user=phone>;tag=3306152785-310961.
> From: "User" <sip:4445555555 at 2.2.2.2>;tag=000f902b48ef00092bde0f52-44bd25ec.
> Call-ID: 000f902b-48ef000b-389b653d-796379fe at 192.168.0.10.
> CSeq: 101 INVITE.
> Contact: sip:16667777777 at 8.8.8.8:29436.
> Content-Type: application/sdp.
> Via: SIP/2.0/UDP 192.168.0.10:5060;rport=5060;received=1.1.1.1;branch=z9hG4bK4057b0b1.
> Record-Route: <sip:2.2.2.2;ftag=000f902b48ef00092bde0f52-44bd25ec;lr=on>.
> Content-Length: 178.
> .
> v=0.
> o=esv1.dfwi.masergy.net 1234 16934 IN IP4 9.9.9.9.
> s=sip call.
> c=IN IP4 2.2.2.2.
> t=0 0.
> m=audio 35020 RTP/AVP 0.
> a=rtpmap:0 PCMU/8000.
> a=sendrecv.
> a=nortpproxy:yes.
> 
> #
> U 2004/10/07 10:42:37.933918 1.1.1.1:5060 -> 2.2.2.2:5060
> ACK sip:2.2.2.2:5060;ftag=000f902b48ef00092bde0f52-44bd25ec;lr=on SIP/2.0.
> Via: SIP/2.0/UDP 192.168.0.10:5060;branch=z9hG4bK3d28987e.
> From: "User" <sip:4445555555 at 2.2.2.2>;tag=000f902b48ef00092bde0f52-44bd25ec.
> To: <sip:6667777777 at 2.2.2.2;user=phone>;tag=3306152785-310961.
> Call-ID: 000f902b-48ef000b-389b653d-796379fe at 192.168.0.10.
> Date: Thu, 07 Oct 2004 15:46:25 GMT.
> CSeq: 101 ACK.
> User-Agent: CSCO/6.
> Route: <sip:16667777777 at 8.8.8.8:29436>.
> Content-Length: 0.
> .
> 
> #
> U 2004/10/07 10:42:37.934311 2.2.2.2:5060 -> 8.8.8.8:29436
> ACK sip:16667777777 at 8.8.8.8:29436 SIP/2.0.
> Max-Forwards: 10.
> Record-Route: <sip:2.2.2.2;ftag=000f902b48ef00092bde0f52-44bd25ec;lr=on>.
> Via: SIP/2.0/UDP 2.2.2.2;branch=0.
> Via: SIP/2.0/UDP 192.168.0.10:5060;rport=5060;received=1.1.1.1;branch=z9hG4bK3d28987e.
> From: "User" <sip:4445555555 at 2.2.2.2>;tag=000f902b48ef00092bde0f52-44bd25ec.
> To: <sip:6667777777 at 2.2.2.2;user=phone>;tag=3306152785-310961.
> Call-ID: 000f902b-48ef000b-389b653d-796379fe at 192.168.0.10.
> Date: Thu, 07 Oct 2004 15:46:25 GMT.
> CSeq: 101 ACK.
> User-Agent: CSCO/6.
> Content-Length: 0.
> .
> 
> #################
> U 2004/10/07 10:42:39.850082 8.8.8.8:29438 -> 2.2.2.2:5060
> SIP/2.0 200 OK.
> To: <sip:6667777777 at 2.2.2.2;user=phone>;tag=3306152785-310961.
> From: "User" <sip:4445555555 at 2.2.2.2>;tag=000f902b48ef00092bde0f52-44bd25ec.
> Call-ID: 000f902b-48ef000b-389b653d-796379fe at 192.168.0.10.
> CSeq: 101 INVITE.
> Contact: sip:16667777777 at 8.8.8.8:5060.
> Content-Type: application/sdp.
> Via: SIP/2.0/UDP 2.2.2.2;branch=z9hG4bKc4b2.5492f2f6.0.
> Via: SIP/2.0/UDP 192.168.0.10:5060;rport=5060;received=1.1.1.1;branch=z9hG4bK4057b0b1.
> Record-Route: <sip:2.2.2.2;ftag=000f902b48ef00092bde0f52-44bd25ec;lr=on>.
> Content-Length: 157.
> .
> v=0.
> o=esv1.dfwi.masergy.net 1234 16934 IN IP4 9.9.9.9.
> s=sip call.
> c=IN IP4 9.9.9.9.
> t=0 0.
> m=audio 6376 RTP/AVP 0.
> a=rtpmap:0 PCMU/8000.
> a=sendrecv.
> 
> #
> U 2004/10/07 10:42:39.850789 2.2.2.2:5060 -> 1.1.1.1:5060
> SIP/2.0 200 OK.
> To: <sip:6667777777 at 2.2.2.2;user=phone>;tag=3306152785-310961.
> From: "User" <sip:4445555555 at 2.2.2.2>;tag=000f902b48ef00092bde0f52-44bd25ec.
> Call-ID: 000f902b-48ef000b-389b653d-796379fe at 192.168.0.10.
> CSeq: 101 INVITE.
> Contact: sip:16667777777 at 8.8.8.8:29438.
> Content-Type: application/sdp.
> Via: SIP/2.0/UDP 192.168.0.10:5060;rport=5060;received=1.1.1.1;branch=z9hG4bK4057b0b1.
> Record-Route: <sip:2.2.2.2;ftag=000f902b48ef00092bde0f52-44bd25ec;lr=on>.
> Content-Length: 178.
> .
> v=0.
> o=esv1.dfwi.masergy.net 1234 16934 IN IP4 9.9.9.9.
> s=sip call.
> c=IN IP4 2.2.2.2.
> t=0 0.
> m=audio 35020 RTP/AVP 0.
> a=rtpmap:0 PCMU/8000.
> a=sendrecv.
> a=nortpproxy:yes.
> 
> #
> U 2004/10/07 10:42:39.938775 1.1.1.1:5060 -> 2.2.2.2:5060
> ACK sip:2.2.2.2:5060;ftag=000f902b48ef00092bde0f52-44bd25ec;lr=on SIP/2.0.
> Via: SIP/2.0/UDP 192.168.0.10:5060;branch=z9hG4bK3d28987e.
> From: "User" <sip:4445555555 at 2.2.2.2>;tag=000f902b48ef00092bde0f52-44bd25ec.
> To: <sip:6667777777 at 2.2.2.2;user=phone>;tag=3306152785-310961.
> Call-ID: 000f902b-48ef000b-389b653d-796379fe at 192.168.0.10.
> Date: Thu, 07 Oct 2004 15:46:25 GMT.
> CSeq: 101 ACK.
> User-Agent: CSCO/6.
> Route: <sip:16667777777 at 8.8.8.8:29436>.
> Content-Length: 0.
> .
> 
> #
> U 2004/10/07 10:42:39.939154 2.2.2.2:5060 -> 8.8.8.8:29436
> ACK sip:16667777777 at 8.8.8.8:29436 SIP/2.0.
> Max-Forwards: 10.
> Record-Route: <sip:2.2.2.2;ftag=000f902b48ef00092bde0f52-44bd25ec;lr=on>.
> Via: SIP/2.0/UDP 2.2.2.2;branch=0.
> Via: SIP/2.0/UDP 192.168.0.10:5060;rport=5060;received=1.1.1.1;branch=z9hG4bK3d28987e.
> From: "User" <sip:4445555555 at 2.2.2.2>;tag=000f902b48ef00092bde0f52-44bd25ec.
> To: <sip:6667777777 at 2.2.2.2;user=phone>;tag=3306152785-310961.
> Call-ID: 000f902b-48ef000b-389b653d-796379fe at 192.168.0.10.
> Date: Thu, 07 Oct 2004 15:46:25 GMT.
> CSeq: 101 ACK.
> User-Agent: CSCO/6.
> Content-Length: 0.
> .
> 
> #####
> U 2004/10/07 10:42:41.787396 2.2.2.2:5060 -> 1.1.1.1:5060
> ....
> #####
> U 2004/10/07 10:42:43.850035 8.8.8.8:29440 -> 2.2.2.2:5060
> SIP/2.0 200 OK.
> To: <sip:6667777777 at 2.2.2.2;user=phone>;tag=3306152785-310961.
> From: "User" <sip:4445555555 at 2.2.2.2>;tag=000f902b48ef00092bde0f52-44bd25ec.
> Call-ID: 000f902b-48ef000b-389b653d-796379fe at 192.168.0.10.
> CSeq: 101 INVITE.
> Contact: sip:16667777777 at 8.8.8.8:5060.
> Content-Type: application/sdp.
> Via: SIP/2.0/UDP 2.2.2.2;branch=z9hG4bKc4b2.5492f2f6.0.
> Via: SIP/2.0/UDP 192.168.0.10:5060;rport=5060;received=1.1.1.1;branch=z9hG4bK4057b0b1.
> Record-Route: <sip:2.2.2.2;ftag=000f902b48ef00092bde0f52-44bd25ec;lr=on>.
> Content-Length: 157.
> .
> v=0.
> o=esv1.dfwi.masergy.net 1234 16934 IN IP4 9.9.9.9.
> s=sip call.
> c=IN IP4 9.9.9.9.
> t=0 0.
> m=audio 6376 RTP/AVP 0.
> a=rtpmap:0 PCMU/8000.
> a=sendrecv.
> 
> #
> U 2004/10/07 10:42:43.850934 2.2.2.2:5060 -> 1.1.1.1:5060
> SIP/2.0 200 OK.
> To: <sip:6667777777 at 2.2.2.2;user=phone>;tag=3306152785-310961.
> From: "User" <sip:4445555555 at 2.2.2.2>;tag=000f902b48ef00092bde0f52-44bd25ec.
> Call-ID: 000f902b-48ef000b-389b653d-796379fe at 192.168.0.10.
> CSeq: 101 INVITE.
> Contact: sip:16667777777 at 8.8.8.8:29440.
> Content-Type: application/sdp.
> Via: SIP/2.0/UDP 192.168.0.10:5060;rport=5060;received=1.1.1.1;branch=z9hG4bK4057b0b1.
> Record-Route: <sip:2.2.2.2;ftag=000f902b48ef00092bde0f52-44bd25ec;lr=on>.
> Content-Length: 178.
> .
> v=0.
> o=esv1.dfwi.masergy.net 1234 16934 IN IP4 9.9.9.9.
> s=sip call.
> c=IN IP4 2.2.2.2.
> t=0 0.
> m=audio 35020 RTP/AVP 0.
> a=rtpmap:0 PCMU/8000.
> a=sendrecv.
> a=nortpproxy:yes.
> 
> #
> U 2004/10/07 10:42:43.948604 1.1.1.1:5060 -> 2.2.2.2:5060
> ACK sip:2.2.2.2:5060;ftag=000f902b48ef00092bde0f52-44bd25ec;lr=on SIP/2.0.
> Via: SIP/2.0/UDP 192.168.0.10:5060;branch=z9hG4bK3d28987e.
> From: "User" <sip:4445555555 at 2.2.2.2>;tag=000f902b48ef00092bde0f52-44bd25ec.
> To: <sip:6667777777 at 2.2.2.2;user=phone>;tag=3306152785-310961.
> Call-ID: 000f902b-48ef000b-389b653d-796379fe at 192.168.0.10.
> Date: Thu, 07 Oct 2004 15:46:25 GMT.
> CSeq: 101 ACK.
> User-Agent: CSCO/6.
> Route: <sip:16667777777 at 8.8.8.8:29436>.
> Content-Length: 0.
> .
> 
> #
> U 2004/10/07 10:42:43.949012 2.2.2.2:5060 -> 8.8.8.8:29436
> ACK sip:16667777777 at 8.8.8.8:29436 SIP/2.0.
> Max-Forwards: 10.
> Record-Route: <sip:2.2.2.2;ftag=000f902b48ef00092bde0f52-44bd25ec;lr=on>.
> Via: SIP/2.0/UDP 2.2.2.2;branch=0.
> Via: SIP/2.0/UDP 192.168.0.10:5060;rport=5060;received=1.1.1.1;branch=z9hG4bK3d28987e.
> From: "User" <sip:4445555555 at 2.2.2.2>;tag=000f902b48ef00092bde0f52-44bd25ec.
> To: <sip:6667777777 at 2.2.2.2;user=phone>;tag=3306152785-310961.
> Call-ID: 000f902b-48ef000b-389b653d-796379fe at 192.168.0.10.
> Date: Thu, 07 Oct 2004 15:46:25 GMT.
> CSeq: 101 ACK.
> User-Agent: CSCO/6.
> Content-Length: 0.
> .
> 
> #########
> U 2004/10/07 10:42:47.859666 8.8.8.8:29442 -> 2.2.2.2:5060
> SIP/2.0 200 OK.
> To: <sip:6667777777 at 2.2.2.2;user=phone>;tag=3306152785-310961.
> From: "User" <sip:4445555555 at 2.2.2.2>;tag=000f902b48ef00092bde0f52-44bd25ec.
> Call-ID: 000f902b-48ef000b-389b653d-796379fe at 192.168.0.10.
> CSeq: 101 INVITE.
> Contact: sip:16667777777 at 8.8.8.8:5060.
> Content-Type: application/sdp.
> Via: SIP/2.0/UDP 2.2.2.2;branch=z9hG4bKc4b2.5492f2f6.0.
> Via: SIP/2.0/UDP 192.168.0.10:5060;rport=5060;received=1.1.1.1;branch=z9hG4bK4057b0b1.
> Record-Route: <sip:2.2.2.2;ftag=000f902b48ef00092bde0f52-44bd25ec;lr=on>.
> Content-Length: 157.
> .
> v=0.
> o=esv1.dfwi.masergy.net 1234 16934 IN IP4 9.9.9.9.
> s=sip call.
> c=IN IP4 9.9.9.9.
> t=0 0.
> m=audio 6376 RTP/AVP 0.
> a=rtpmap:0 PCMU/8000.
> a=sendrecv.
> 
> #
> U 2004/10/07 10:42:47.860529 2.2.2.2:5060 -> 1.1.1.1:5060
> SIP/2.0 200 OK.
> To: <sip:6667777777 at 2.2.2.2;user=phone>;tag=3306152785-310961.
> From: "User" <sip:4445555555 at 2.2.2.2>;tag=000f902b48ef00092bde0f52-44bd25ec.
> Call-ID: 000f902b-48ef000b-389b653d-796379fe at 192.168.0.10.
> CSeq: 101 INVITE.
> Contact: sip:16667777777 at 8.8.8.8:29442.
> Content-Type: application/sdp.
> Via: SIP/2.0/UDP 192.168.0.10:5060;rport=5060;received=1.1.1.1;branch=z9hG4bK4057b0b1.
> Record-Route: <sip:2.2.2.2;ftag=000f902b48ef00092bde0f52-44bd25ec;lr=on>.
> Content-Length: 178.
> .
> v=0.
> o=esv1.dfwi.masergy.net 1234 16934 IN IP4 9.9.9.9.
> s=sip call.
> c=IN IP4 2.2.2.2.
> t=0 0.
> m=audio 35020 RTP/AVP 0.
> a=rtpmap:0 PCMU/8000.
> a=sendrecv.
> a=nortpproxy:yes.
> 
> #
> U 2004/10/07 10:42:47.953324 1.1.1.1:5060 -> 2.2.2.2:5060
> ACK sip:2.2.2.2:5060;ftag=000f902b48ef00092bde0f52-44bd25ec;lr=on SIP/2.0.
> Via: SIP/2.0/UDP 192.168.0.10:5060;branch=z9hG4bK3d28987e.
> From: "User" <sip:4445555555 at 2.2.2.2>;tag=000f902b48ef00092bde0f52-44bd25ec.
> To: <sip:6667777777 at 2.2.2.2;user=phone>;tag=3306152785-310961.
> Call-ID: 000f902b-48ef000b-389b653d-796379fe at 192.168.0.10.
> Date: Thu, 07 Oct 2004 15:46:25 GMT.
> CSeq: 101 ACK.
> User-Agent: CSCO/6.
> Route: <sip:16667777777 at 8.8.8.8:29436>.
> Content-Length: 0.
> .
> 
> #
> U 2004/10/07 10:42:47.953722 2.2.2.2:5060 -> 8.8.8.8:29436
> ACK sip:16667777777 at 8.8.8.8:29436 SIP/2.0.
> Max-Forwards: 10.
> Record-Route: <sip:2.2.2.2;ftag=000f902b48ef00092bde0f52-44bd25ec;lr=on>.
> Via: SIP/2.0/UDP 2.2.2.2;branch=0.
> Via: SIP/2.0/UDP 192.168.0.10:5060;rport=5060;received=1.1.1.1;branch=z9hG4bK3d28987e.
> From: "User" <sip:4445555555 at 2.2.2.2>;tag=000f902b48ef00092bde0f52-44bd25ec.
> To: <sip:6667777777 at 2.2.2.2;user=phone>;tag=3306152785-310961.
> Call-ID: 000f902b-48ef000b-389b653d-796379fe at 192.168.0.10.
> Date: Thu, 07 Oct 2004 15:46:25 GMT.
> CSeq: 101 ACK.
> User-Agent: CSCO/6.
> Content-Length: 0.
> .
> 
> #
> U 2004/10/07 10:42:51.869469 8.8.8.8:29444 -> 2.2.2.2:5060
> SIP/2.0 200 OK.
> To: <sip:6667777777 at 2.2.2.2;user=phone>;tag=3306152785-310961.
> From: "User" <sip:4445555555 at 2.2.2.2>;tag=000f902b48ef00092bde0f52-44bd25ec.
> Call-ID: 000f902b-48ef000b-389b653d-796379fe at 192.168.0.10.
> CSeq: 101 INVITE.
> Contact: sip:16667777777 at 8.8.8.8:5060.
> Content-Type: application/sdp.
> Via: SIP/2.0/UDP 2.2.2.2;branch=z9hG4bKc4b2.5492f2f6.0.
> Via: SIP/2.0/UDP 192.168.0.10:5060;rport=5060;received=1.1.1.1;branch=z9hG4bK4057b0b1.
> Record-Route: <sip:2.2.2.2;ftag=000f902b48ef00092bde0f52-44bd25ec;lr=on>.
> Content-Length: 157.
> .
> v=0.
> o=esv1.dfwi.masergy.net 1234 16934 IN IP4 9.9.9.9.
> s=sip call.
> c=IN IP4 9.9.9.9.
> t=0 0.
> m=audio 6376 RTP/AVP 0.
> a=rtpmap:0 PCMU/8000.
> a=sendrecv.
> 
> #
> U 2004/10/07 10:42:51.870300 2.2.2.2:5060 -> 1.1.1.1:5060
> SIP/2.0 200 OK.
> To: <sip:6667777777 at 2.2.2.2;user=phone>;tag=3306152785-310961.
> From: "User" <sip:4445555555 at 2.2.2.2>;tag=000f902b48ef00092bde0f52-44bd25ec.
> Call-ID: 000f902b-48ef000b-389b653d-796379fe at 192.168.0.10.
> CSeq: 101 INVITE.
> Contact: sip:16667777777 at 8.8.8.8:29444.
> Content-Type: application/sdp.
> Via: SIP/2.0/UDP 192.168.0.10:5060;rport=5060;received=1.1.1.1;branch=z9hG4bK4057b0b1.
> Record-Route: <sip:2.2.2.2;ftag=000f902b48ef00092bde0f52-44bd25ec;lr=on>.
> Content-Length: 178.
> .
> v=0.
> o=esv1.dfwi.masergy.net 1234 16934 IN IP4 9.9.9.9.
> s=sip call.
> c=IN IP4 2.2.2.2.
> t=0 0.
> m=audio 35020 RTP/AVP 0.
> a=rtpmap:0 PCMU/8000.
> a=sendrecv.
> a=nortpproxy:yes.
> 
> #
> U 2004/10/07 10:42:51.887443 2.2.2.2:5060 -> 1.1.1.1:5060
> ....
> #
> U 2004/10/07 10:42:51.964233 1.1.1.1:5060 -> 2.2.2.2:5060
> ACK sip:2.2.2.2:5060;ftag=000f902b48ef00092bde0f52-44bd25ec;lr=on SIP/2.0.
> Via: SIP/2.0/UDP 192.168.0.10:5060;branch=z9hG4bK3d28987e.
> From: "User" <sip:4445555555 at 2.2.2.2>;tag=000f902b48ef00092bde0f52-44bd25ec.
> To: <sip:6667777777 at 2.2.2.2;user=phone>;tag=3306152785-310961.
> Call-ID: 000f902b-48ef000b-389b653d-796379fe at 192.168.0.10.
> Date: Thu, 07 Oct 2004 15:46:25 GMT.
> CSeq: 101 ACK.
> User-Agent: CSCO/6.
> Route: <sip:16667777777 at 8.8.8.8:29436>.
> Content-Length: 0.
> .
> 
> #
> U 2004/10/07 10:42:51.964630 2.2.2.2:5060 -> 8.8.8.8:29436
> ACK sip:16667777777 at 8.8.8.8:29436 SIP/2.0.
> Max-Forwards: 10.
> Record-Route: <sip:2.2.2.2;ftag=000f902b48ef00092bde0f52-44bd25ec;lr=on>.
> Via: SIP/2.0/UDP 2.2.2.2;branch=0.
> Via: SIP/2.0/UDP 192.168.0.10:5060;rport=5060;received=1.1.1.1;branch=z9hG4bK3d28987e.
> From: "User" <sip:4445555555 at 2.2.2.2>;tag=000f902b48ef00092bde0f52-44bd25ec.
> To: <sip:6667777777 at 2.2.2.2;user=phone>;tag=3306152785-310961.
> Call-ID: 000f902b-48ef000b-389b653d-796379fe at 192.168.0.10.
> Date: Thu, 07 Oct 2004 15:46:25 GMT.
> CSeq: 101 ACK.
> User-Agent: CSCO/6.
> Content-Length: 0.
> .
> 
> #
> U 2004/10/07 10:43:01.987391 2.2.2.2:5060 -> 1.1.1.1:5060
> ....
> #####################
> U 2004/10/07 10:43:11.832964 8.8.8.8:29451 -> 2.2.2.2:5060
> BYE sip:2.2.2.2;ftag=000f902b48ef00092bde0f52-44bd25ec;lr=on SIP/2.0.
> Max-Forwards: 68.
> Route: <sip:4445555555 at 1.1.1.1:5060>.
> To: "User" <sip:4445555555 at 2.2.2.2>;tag=000f902b48ef00092bde0f52-44bd25ec.
> From: <sip:6667777777 at 2.2.2.2;user=phone>;tag=3306152785-310961.
> Call-ID: 000f902b-48ef000b-389b653d-796379fe at 192.168.0.10.
> CSeq: 2 BYE.
> Via: SIP/2.0/UDP 8.8.8.8:5060.
> Contact: sip:16667777777 at 8.8.8.8:5060.
> Content-Length: 0.
> .
> 
> #
> U 2004/10/07 10:43:11.833608 2.2.2.2:5060 -> 1.1.1.1:5060
> BYE sip:4445555555 at 1.1.1.1:5060 SIP/2.0.
> Record-Route: <sip:2.2.2.2;ftag=3306152785-310961;lr=on>.
> Max-Forwards: 16.
> To: "User" <sip:4445555555 at 2.2.2.2>;tag=000f902b48ef00092bde0f52-44bd25ec.
> From: <sip:6667777777 at 2.2.2.2;user=phone>;tag=3306152785-310961.
> Call-ID: 000f902b-48ef000b-389b653d-796379fe at 192.168.0.10.
> CSeq: 2 BYE.
> Via: SIP/2.0/UDP 2.2.2.2;branch=z9hG4bKdac.d168c652.0.
> Via: SIP/2.0/UDP 8.8.8.8:5060;rport=29451.
> Contact: sip:16667777777 at 8.8.8.8:29451.
> Content-Length: 0.
> .
> 
> #
> U 2004/10/07 10:43:11.957265 1.1.1.1:5060 -> 2.2.2.2:5060
> SIP/2.0 200 OK.
> Via: SIP/2.0/UDP 2.2.2.2;branch=z9hG4bKdac.d168c652.0,SIP/2.0/UDP 8.8.8.8:5060;rport=29451.
> From: <sip:6667777777 at 2.2.2.2;user=phone>;tag=3306152785-310961.
> To: "User" <sip:4445555555 at 2.2.2.2>;tag=000f902b48ef00092bde0f52-44bd25ec.
> Call-ID: 000f902b-48ef000b-389b653d-796379fe at 192.168.0.10.
> Date: Thu, 07 Oct 2004 15:47:00 GMT.
> CSeq: 2 BYE.
> Server: CSCO/6.
> Content-Length: 0.
> RTP-RxStat: Dur=40,Pkt=1986,Oct=317760,LatePkt=0,LostPkt=0,AvgJit=0.
> RTP-TxStat: Dur=40,Pkt=1992,Oct=318720.
> .
> 
> #
> U 2004/10/07 10:43:11.957523 2.2.2.2:5060 -> 8.8.8.8:29451
> SIP/2.0 200 OK.
> Via: SIP/2.0/UDP 8.8.8.8:5060;rport=29451.
> From: <sip:6667777777 at 2.2.2.2;user=phone>;tag=3306152785-310961.
> To: "User" <sip:4445555555 at 2.2.2.2>;tag=000f902b48ef00092bde0f52-44bd25ec.
> Call-ID: 000f902b-48ef000b-389b653d-796379fe at 192.168.0.10.
> Date: Thu, 07 Oct 2004 15:47:00 GMT.
> CSeq: 2 BYE.
> Server: CSCO/6.
> Content-Length: 0.
> RTP-RxStat: Dur=40,Pkt=1986,Oct=317760,LatePkt=0,LostPkt=0,AvgJit=0.
> RTP-TxStat: Dur=40,Pkt=1992,Oct=318720.
> .
> 
> #
> U 2004/10/07 10:43:12.087422 2.2.2.2:5060 -> 1.1.1.1:5060
> ....
> #
> U 2004/10/07 10:43:12.336993 8.8.8.8:29451 -> 2.2.2.2:5060
> BYE sip:2.2.2.2;ftag=000f902b48ef00092bde0f52-44bd25ec;lr=on SIP/2.0.
> Max-Forwards: 68.
> Route: <sip:4445555555 at 1.1.1.1:5060>.
> To: "User" <sip:4445555555 at 2.2.2.2>;tag=000f902b48ef00092bde0f52-44bd25ec.
> From: <sip:6667777777 at 2.2.2.2;user=phone>;tag=3306152785-310961.
> Call-ID: 000f902b-48ef000b-389b653d-796379fe at 192.168.0.10.
> CSeq: 2 BYE.
> Via: SIP/2.0/UDP 8.8.8.8:5060.
> Contact: sip:16667777777 at 8.8.8.8:5060.
> Content-Length: 0.
> .
> 
> #
> U 2004/10/07 10:43:12.337450 2.2.2.2:5060 -> 8.8.8.8:29451
> SIP/2.0 200 OK.
> Via: SIP/2.0/UDP 8.8.8.8:5060;rport=29451.
> From: <sip:6667777777 at 2.2.2.2;user=phone>;tag=3306152785-310961.
> To: "User" <sip:4445555555 at 2.2.2.2>;tag=000f902b48ef00092bde0f52-44bd25ec.
> Call-ID: 000f902b-48ef000b-389b653d-796379fe at 192.168.0.10.
> Date: Thu, 07 Oct 2004 15:47:00 GMT.
> CSeq: 2 BYE.
> Server: CSCO/6.
> Content-Length: 0.
> RTP-RxStat: Dur=40,Pkt=1986,Oct=317760,LatePkt=0,LostPkt=0,AvgJit=0.
> RTP-TxStat: Dur=40,Pkt=1992,Oct=318720.
> .
> 
> #
> U 2004/10/07 10:43:13.341806 8.8.8.8:29452 -> 2.2.2.2:5060
> BYE sip:2.2.2.2;ftag=000f902b48ef00092bde0f52-44bd25ec;lr=on SIP/2.0.
> Max-Forwards: 68.
> Route: <sip:4445555555 at 1.1.1.1:5060>.
> To: "User" <sip:4445555555 at 2.2.2.2>;tag=000f902b48ef00092bde0f52-44bd25ec.
> From: <sip:6667777777 at 2.2.2.2;user=phone>;tag=3306152785-310961.
> Call-ID: 000f902b-48ef000b-389b653d-796379fe at 192.168.0.10.
> CSeq: 2 BYE.
> Via: SIP/2.0/UDP 8.8.8.8:5060.
> Contact: sip:16667777777 at 8.8.8.8:5060.
> Content-Length: 0.
> .
> 
> #
> U 2004/10/07 10:43:13.342319 2.2.2.2:5060 -> 8.8.8.8:29451
> SIP/2.0 200 OK.
> Via: SIP/2.0/UDP 8.8.8.8:5060;rport=29451.
> From: <sip:6667777777 at 2.2.2.2;user=phone>;tag=3306152785-310961.
> To: "User" <sip:4445555555 at 2.2.2.2>;tag=000f902b48ef00092bde0f52-44bd25ec.
> Call-ID: 000f902b-48ef000b-389b653d-796379fe at 192.168.0.10.
> Date: Thu, 07 Oct 2004 15:47:00 GMT.
> CSeq: 2 BYE.
> Server: CSCO/6.
> Content-Length: 0.
> RTP-RxStat: Dur=40,Pkt=1986,Oct=317760,LatePkt=0,LostPkt=0,AvgJit=0.
> RTP-TxStat: Dur=40,Pkt=1992,Oct=318720.
> .
> 
> #####
> U 2004/10/07 10:43:15.351780 8.8.8.8:29453 -> 2.2.2.2:5060
> BYE sip:2.2.2.2;ftag=000f902b48ef00092bde0f52-44bd25ec;lr=on SIP/2.0.
> Max-Forwards: 68.
> Route: <sip:4445555555 at 1.1.1.1:5060>.
> To: "User" <sip:4445555555 at 2.2.2.2>;tag=000f902b48ef00092bde0f52-44bd25ec.
> From: <sip:6667777777 at 2.2.2.2;user=phone>;tag=3306152785-310961.
> Call-ID: 000f902b-48ef000b-389b653d-796379fe at 192.168.0.10.
> CSeq: 2 BYE.
> Via: SIP/2.0/UDP 8.8.8.8:5060.
> Contact: sip:16667777777 at 8.8.8.8:5060.
> Content-Length: 0.
> .
> 
> #
> U 2004/10/07 10:43:15.352338 2.2.2.2:5060 -> 8.8.8.8:29451
> SIP/2.0 200 OK.
> Via: SIP/2.0/UDP 8.8.8.8:5060;rport=29451.
> From: <sip:6667777777 at 2.2.2.2;user=phone>;tag=3306152785-310961.
> To: "User" <sip:4445555555 at 2.2.2.2>;tag=000f902b48ef00092bde0f52-44bd25ec.
> Call-ID: 000f902b-48ef000b-389b653d-796379fe at 192.168.0.10.
> Date: Thu, 07 Oct 2004 15:47:00 GMT.
> CSeq: 2 BYE.
> Server: CSCO/6.
> Content-Length: 0.
> RTP-RxStat: Dur=40,Pkt=1986,Oct=317760,LatePkt=0,LostPkt=0,AvgJit=0.
> RTP-TxStat: Dur=40,Pkt=1992,Oct=318720.
> .
> 
> ########exit
> 138 received, 0 dropped
> 
> 
> ------------------------------------------------------------------------
> 
> _______________________________________________
> Serusers mailing list
> serusers at lists.iptel.org
> http://lists.iptel.org/mailman/listinfo/serusers