In Line 439 of the attached log, you can see the REFER-TO
arriving at the Patton Smartnode 4960 gateway... the
REFER-TO is destined for mailto:'4...@voip.royalroads.ca'. 
This results in the gateway trying to send the INVITE back
to the SipXecs server, instead of to the correct remote
destination (which in this case would be out an PRI line to
a Nortel legacy system).

If I do the same capture, but use the same handset, and dial
a call to '4495', the INVITE that arrives at the Patton
gateway destined for mailto:'994495@10.60.0.10' (the number,
translated as per the dial plan, and the destination domain
as the IP address of the Patton).  This is handled correctly
by the gateway, and the call routed correctly.

The root of the problem is, the SipXecs server, does not
evaluate/modify REFER-TO packets according to the same rules
that it evaluates initial INVITE packets, defined in the
dialplan.

I should also mention here, as I did in the ticket, that I
have updated the system from 4.2.1 to 4.4.0, and that the
behaviour still exists, and is consistent on both versions.

Cheers,

...Steve...


09:43:17.866355 IP (tos 0x0, ttl 128, id 19700, offset 0, flags [none], proto: 
UDP (17), length: 858) 10.60.0.10.sip > telecom-1.royalroads.ca.sip: SIP, 
length: 830
        INVITE sip:3912...@voip.royalroads.ca SIP/2.0
        Via: SIP/2.0/UDP 10.60.0.10:5060;branch=z9hG4bK43a013792ac9c802a
        Max-Forwards: 70
        From: <sip:2507018373@10.60.0.10:5060>;tag=6e1b873eba
        To: <sip:3912...@voip.royalroads.ca>
        Call-ID: 55fe4dd023300b8e
        CSeq: 23058 INVITE
        Contact: <sip:2507018373@10.60.0.10:5060>
        P-Asserted-Identity: <sip:2507018373@10.60.0.10:5060>
        Supported: replaces
        User-Agent: Patton SN4960 4E48V 00A0BA050AA0 R5.7 2011-05-13 H323 RBS 
SIP M5T SIP Stack/4.0.30.30
        Content-Type: application/sdp
        Content-Length: 287

        v=0
        o=MxSIP 0 336 IN IP4 10.60.0.10
        s=SIP Call
        c=IN IP4 10.60.0.10
        t=0 0
        m=audio 4998 RTP/AVP 18 0 8 4 101
        a=rtpmap:18 G729/8000
        a=rtpmap:0 PCMU/8000
        a=rtpmap:8 PCMA/8000
        a=rtpmap:4 G723/8000
        a=rtpmap:101 telephone-event/8000
        a=fmtp:18 annexb=no
        a=fmtp:101 0-16
        a=sendrecv

09:43:17.867001 IP (tos 0x0, ttl  64, id 31503, offset 0, flags [none], proto: 
UDP (17), length: 275) telecom-1.royalroads.ca.sip > 10.60.0.10.sip: SIP, 
length: 247
        SIP/2.0 100 Trying
        From: <sip:2507018373@10.60.0.10:5060>;tag=6e1b873eba
        To: <sip:3912...@voip.royalroads.ca>
        Call-Id: 55fe4dd023300b8e
        Cseq: 23058 INVITE
        Via: SIP/2.0/UDP 10.60.0.10:5060;branch=z9hG4bK43a013792ac9c802a
        Content-Length: 0


09:43:17.883114 IP (tos 0x0, ttl  64, id 47280, offset 0, flags [none], proto: 
UDP (17), length: 1453) telecom-1.royalroads.ca.sip > 10.60.100.185.5180: SIP, 
length: 1425
        INVITE sip:2555@10.60.100.185:5180;transport=udp;x-sipX-nonat SIP/2.0
        Record-Route: 
<sip:10.60.0.25:5060;lr;sipXecs-CallDest=AL%2CINT;sipXecs-rs=%2Aauth%7E.%2Afrom%7ENmUxYjg3M2ViYQ%60%60.900_ntap%2Aid%7EMzIzMzctMTg%60%21f691a8d5de2a94fee3f065d000e4edff>
        Via: SIP/2.0/UDP 10.60.0.25;branch=z9hG4bK-XX-0553XWHMGQMEpEritGHIYnLW3Q
        Via: SIP/2.0/UDP 
10.60.0.25;branch=z9hG4bK-XX-054eFaN10d_PPjE9rVJYUj9ecA~bPine`quVqVKJow6H`kWtQ;id=32337-18
        Via: SIP/2.0/UDP 
10.60.0.25;branch=z9hG4bK-XX-0545`rn8V2ZjILu72qL_ttf6Kg~JTPUgDqL44kPEbPhfkdu3A
        Via: SIP/2.0/UDP 10.60.0.10:5060;branch=z9hG4bK43a013792ac9c802a
        Max-Forwards: 16
        From: <sip:2507018373@10.60.0.10:5060>;tag=6e1b873eba
        To: <sip:3912...@voip.royalroads.ca>
        Call-Id: 55fe4dd023300b8e
        Cseq: 23058 INVITE
        Contact: <sip:2507018373@10.60.0.10:5060;x-sipX-nonat>
        P-Asserted-Identity: <sip:2507018373@10.60.0.10:5060>
        Supported: replaces
        User-Agent: Patton SN4960 4E48V 00A0BA050AA0 R5.7 2011-05-13 H323 RBS 
SIP M5T SIP Stack/4.0.30.30
        Content-Type: application/sdp
        Content-Length: 287
        Date: Wed, 03 Aug 2011 16:43:17 GMT
        Expires: 20
        X-Sipx-Handled: X10.60.0.25-207.23.111.25

        v=0
        o=MxSIP 0 336 IN IP4 10.60.0.10
        s=SIP Call
        c=IN IP4 10.60.0.10
        t=0 0
        m=audio 4998 RTP/AVP 18 0 8 4 101
        a=rtpmap:18 G729/8000
        a=rtpmap:0 PCMU/8000
        a=rtpmap:8 PCMA/8000
        a=rtpmap:4 G723/8000
        a=rtpmap:101 telephone-event/8000
        a=fmtp:18 annexb=no
        a=fmtp:101 0-16
        a=sendrecv

09:43:17.919872 IP (tos 0xc0, ttl 255, id 12129, offset 0, flags [none], proto: 
UDP (17), length: 596) 10.60.100.185.5180 > telecom-1.royalroads.ca.sip: SIP, 
length: 568
        SIP/2.0 100 Trying
        Via: SIP/2.0/UDP 10.60.0.25;branch=z9hG4bK-XX-0553XWHMGQMEpEritGHIYnLW3Q
        Via: SIP/2.0/UDP 
10.60.0.25;branch=z9hG4bK-XX-054eFaN10d_PPjE9rVJYUj9ecA~bPine`quVqVKJow6H`kWtQ;id=32337-18
        Via: SIP/2.0/UDP 
10.60.0.25;branch=z9hG4bK-XX-0545`rn8V2ZjILu72qL_ttf6Kg~JTPUgDqL44kPEbPhfkdu3A
        Via: SIP/2.0/UDP 10.60.0.10:5060;branch=z9hG4bK43a013792ac9c802a
        From: <sip:2507018373@10.60.0.10:5060>;tag=6e1b873eba
        To: <sip:3912...@voip.royalroads.ca>
        Call-ID: 55fe4dd023300b8e
        CSeq: 23058 INVITE
        User-Agent: Grandstream GXP2000 1.2.5.3
        Content-Length: 0


09:43:17.933000 IP (tos 0xc0, ttl 255, id 12130, offset 0, flags [none], proto: 
UDP (17), length: 944) 10.60.100.185.5180 > telecom-1.royalroads.ca.sip: SIP, 
length: 916
        SIP/2.0 180 Ringing
        Via: SIP/2.0/UDP 10.60.0.25;branch=z9hG4bK-XX-0553XWHMGQMEpEritGHIYnLW3Q
        Via: SIP/2.0/UDP 
10.60.0.25;branch=z9hG4bK-XX-054eFaN10d_PPjE9rVJYUj9ecA~bPine`quVqVKJow6H`kWtQ;id=32337-18
        Via: SIP/2.0/UDP 
10.60.0.25;branch=z9hG4bK-XX-0545`rn8V2ZjILu72qL_ttf6Kg~JTPUgDqL44kPEbPhfkdu3A
        Via: SIP/2.0/UDP 10.60.0.10:5060;branch=z9hG4bK43a013792ac9c802a
        Record-Route: 
<sip:10.60.0.25:5060;lr;sipXecs-CallDest=AL%2CINT;sipXecs-rs=%2Aauth%7E.%2Afrom%7ENmUxYjg3M2ViYQ%60%60.900_ntap%2Aid%7EMzIzMzctMTg%60%21f691a8d5de2a94fee3f065d000e4edff>
        From: <sip:2507018373@10.60.0.10:5060>;tag=6e1b873eba
        To: <sip:3912...@voip.royalroads.ca>;tag=ac10de2f39520497
        Call-ID: 55fe4dd023300b8e
        CSeq: 23058 INVITE
        User-Agent: Grandstream GXP2000 1.2.5.3
        Contact: <sip:2555@10.60.100.185:5180;transport=udp>
        Allow: 
INVITE,ACK,CANCEL,BYE,NOTIFY,REFER,OPTIONS,INFO,SUBSCRIBE,UPDATE,PRACK,MESSAGE
        Content-Length: 0


09:43:17.934311 IP (tos 0x0, ttl  64, id 31504, offset 0, flags [none], proto: 
UDP (17), length: 713) telecom-1.royalroads.ca.sip > 10.60.0.10.sip: SIP, 
length: 685
        SIP/2.0 180 Ringing
        Record-Route: 
<sip:10.60.0.25:5060;lr;sipXecs-CallDest=AL%2CINT;sipXecs-rs=%2Aauth%7E.%2Afrom%7ENmUxYjg3M2ViYQ%60%60.900_ntap%2Aid%7EMzIzMzctMTg%60%21f691a8d5de2a94fee3f065d000e4edff;x-sipX-done>
        Via: SIP/2.0/UDP 10.60.0.10:5060;branch=z9hG4bK43a013792ac9c802a
        From: <sip:2507018373@10.60.0.10:5060>;tag=6e1b873eba
        To: <sip:3912...@voip.royalroads.ca>;tag=ac10de2f39520497
        Call-Id: 55fe4dd023300b8e
        Cseq: 23058 INVITE
        User-Agent: Grandstream GXP2000 1.2.5.3
        Contact: <sip:2555@10.60.100.185:5180;transport=udp>
        Allow: 
INVITE,ACK,CANCEL,BYE,NOTIFY,REFER,OPTIONS,INFO,SUBSCRIBE,UPDATE,PRACK,MESSAGE
        Content-Length: 0
        Date: Wed, 03 Aug 2011 16:43:17 GMT


09:43:19.309278 IP (tos 0xc0, ttl 255, id 12131, offset 0, flags [none], proto: 
UDP (17), length: 1216) 10.60.100.185.5180 > telecom-1.royalroads.ca.sip: SIP, 
length: 1188
        SIP/2.0 200 OK
        Via: SIP/2.0/UDP 10.60.0.25;branch=z9hG4bK-XX-0553XWHMGQMEpEritGHIYnLW3Q
        Via: SIP/2.0/UDP 
10.60.0.25;branch=z9hG4bK-XX-054eFaN10d_PPjE9rVJYUj9ecA~bPine`quVqVKJow6H`kWtQ;id=32337-18
        Via: SIP/2.0/UDP 
10.60.0.25;branch=z9hG4bK-XX-0545`rn8V2ZjILu72qL_ttf6Kg~JTPUgDqL44kPEbPhfkdu3A
        Via: SIP/2.0/UDP 10.60.0.10:5060;branch=z9hG4bK43a013792ac9c802a
        Record-Route: 
<sip:10.60.0.25:5060;lr;sipXecs-CallDest=AL%2CINT;sipXecs-rs=%2Aauth%7E.%2Afrom%7ENmUxYjg3M2ViYQ%60%60.900_ntap%2Aid%7EMzIzMzctMTg%60%21f691a8d5de2a94fee3f065d000e4edff>
        From: <sip:2507018373@10.60.0.10:5060>;tag=6e1b873eba
        To: <sip:3912...@voip.royalroads.ca>;tag=ac10de2f39520497
        Call-ID: 55fe4dd023300b8e
        CSeq: 23058 INVITE
        User-Agent: Grandstream GXP2000 1.2.5.3
        Contact: <sip:2555@10.60.100.185:5180;transport=udp>
        Allow: 
INVITE,ACK,CANCEL,BYE,NOTIFY,REFER,OPTIONS,INFO,SUBSCRIBE,UPDATE,PRACK,MESSAGE
        Content-Type: application/sdp
        Supported: replaces, timer
        Content-Length: 216

        v=0
        o=2555 8000 8000 IN IP4 10.60.100.185
        s=SIP Call
        c=IN IP4 10.60.100.185
        t=0 0
        m=audio 55224 RTP/AVP 18 101
        a=sendrecv
        a=rtpmap:18 G729/8000
        a=ptime:20
        a=rtpmap:101 telephone-event/8000
        a=fmtp:101 0-11

09:43:19.312262 IP (tos 0x0, ttl  64, id 31505, offset 0, flags [none], proto: 
UDP (17), length: 985) telecom-1.royalroads.ca.sip > 10.60.0.10.sip: SIP, 
length: 957
        SIP/2.0 200 OK
        Record-Route: 
<sip:10.60.0.25:5060;lr;sipXecs-CallDest=AL%2CINT;sipXecs-rs=%2Aauth%7E.%2Afrom%7ENmUxYjg3M2ViYQ%60%60.900_ntap%2Aid%7EMzIzMzctMTg%60%21f691a8d5de2a94fee3f065d000e4edff;x-sipX-done>
        Via: SIP/2.0/UDP 10.60.0.10:5060;branch=z9hG4bK43a013792ac9c802a
        From: <sip:2507018373@10.60.0.10:5060>;tag=6e1b873eba
        To: <sip:3912...@voip.royalroads.ca>;tag=ac10de2f39520497
        Call-Id: 55fe4dd023300b8e
        Cseq: 23058 INVITE
        User-Agent: Grandstream GXP2000 1.2.5.3
        Contact: <sip:2555@10.60.100.185:5180;transport=udp>
        Allow: 
INVITE,ACK,CANCEL,BYE,NOTIFY,REFER,OPTIONS,INFO,SUBSCRIBE,UPDATE,PRACK,MESSAGE
        Content-Type: application/sdp
        Supported: replaces, timer
        Content-Length: 216
        Date: Wed, 03 Aug 2011 16:43:19 GMT

        v=0
        o=2555 8000 8000 IN IP4 10.60.100.185
        s=SIP Call
        c=IN IP4 10.60.100.185
        t=0 0
        m=audio 55224 RTP/AVP 18 101
        a=sendrecv
        a=rtpmap:18 G729/8000
        a=ptime:20
        a=rtpmap:101 telephone-event/8000
        a=fmtp:101 0-11

09:43:19.347467 IP (tos 0x0, ttl 128, id 19836, offset 0, flags [none], proto: 
UDP (17), length: 621) 10.60.0.10.sip > telecom-1.royalroads.ca.sip: SIP, 
length: 593
        ACK sip:2555@10.60.100.185:5180;transport=udp SIP/2.0
        Via: SIP/2.0/UDP 10.60.0.10:5060;branch=z9hG4bK68eab2d8d9d33ae9a
        Route: 
<sip:10.60.0.25:5060;lr;sipXecs-CallDest=AL%2cINT;sipXecs-rs=*auth~.*from~NmUxYjg3M2ViYQ%60%60.900_ntap*id~MzIzMzctMTg%60!f691a8d5de2a94fee3f065d000e4edff;x-sipX-done>
        Max-Forwards: 70
        From: <sip:2507018373@10.60.0.10:5060>;tag=6e1b873eba
        To: <sip:3912...@voip.royalroads.ca>;tag=ac10de2f39520497
        Call-ID: 55fe4dd023300b8e
        CSeq: 23058 ACK
        User-Agent: Patton SN4960 4E48V 00A0BA050AA0 R5.7 2011-05-13 H323 RBS 
SIP M5T SIP Stack/4.0.30.30
        Content-Length: 0


09:43:19.349551 IP (tos 0x0, ttl  64, id 47281, offset 0, flags [none], proto: 
UDP (17), length: 556) telecom-1.royalroads.ca.sip > 10.60.100.185.5180: SIP, 
length: 528
        ACK sip:2555@10.60.100.185:5180;transport=udp SIP/2.0
        Via: SIP/2.0/UDP 10.60.0.25;branch=z9hG4bK-XX-0555PhqWIdqoFXXQD4P6lLnRZA
        Via: SIP/2.0/UDP 10.60.0.10:5060;branch=z9hG4bK68eab2d8d9d33ae9a
        Max-Forwards: 20
        From: <sip:2507018373@10.60.0.10:5060>;tag=6e1b873eba
        To: <sip:3912...@voip.royalroads.ca>;tag=ac10de2f39520497
        Call-Id: 55fe4dd023300b8e
        Cseq: 23058 ACK
        User-Agent: Patton SN4960 4E48V 00A0BA050AA0 R5.7 2011-05-13 H323 RBS 
SIP M5T SIP Stack/4.0.30.30
        Content-Length: 0
        Date: Wed, 03 Aug 2011 16:43:19 GMT


09:43:20.911496 IP (tos 0xc0, ttl 255, id 12133, offset 0, flags [none], proto: 
UDP (17), length: 1215) 10.60.100.185.5180 > telecom-1.royalroads.ca.sip: SIP, 
length: 1187
        INVITE sip:2507018373@10.60.0.10:5060;x-sipX-nonat SIP/2.0
        Via: SIP/2.0/UDP 10.60.100.185:5180;branch=z9hG4bKbe89f11b3df41a12
        Route: 
<sip:10.60.0.25:5060;lr;sipXecs-CallDest=AL%2CINT;sipXecs-rs=%2Aauth%7E.%2Afrom%7ENmUxYjg3M2ViYQ%60%60.900_ntap%2Aid%7EMzIzMzctMTg%60%21f691a8d5de2a94fee3f065d000e4edff>
        From: <sip:3912...@voip.royalroads.ca>;tag=ac10de2f39520497
        To: <sip:2507018373@10.60.0.10:5060>;tag=6e1b873eba
        Contact: <sip:2555@10.60.100.185:5180;transport=udp>
        Supported: replaces, timer, path
        P-Early-Media: Supported
        Call-ID: 55fe4dd023300b8e
        CSeq: 9917 INVITE
        User-Agent: Grandstream GXP2000 1.2.5.3
        Max-Forwards: 70
        Allow: 
INVITE,ACK,CANCEL,BYE,NOTIFY,REFER,OPTIONS,INFO,SUBSCRIBE,UPDATE,PRACK,MESSAGE
        Content-Type: application/sdp
        Content-Length: 407

        v=0
        o=2555 8000 8001 IN IP4 10.60.100.185
        s=SIP Call
        c=IN IP4 10.60.100.185
        t=0 0
        m=audio 55224 RTP/AVP 18 0 3 9 2 4 97 8 101
        a=sendonly
        a=rtpmap:18 G729/8000
        a=rtpmap:0 PCMU/8000
        a=rtpmap:3 GSM/8000
        a=rtpmap:9 G722/8000
        a=rtpmap:2 G726-32/8000
        a=rtpmap:4 G723/8000
        a=rtpmap:97 iLBC/8000
        a=fmtp:97 mode=20
        a=rtpmap:8 PCMA/8000
        a=ptime:20
        a=rtpmap:101 telephone-event/8000
        a=fmtp:101 0-11

09:43:20.912347 IP (tos 0x0, ttl  64, id 47282, offset 0, flags [none], proto: 
UDP (17), length: 297) telecom-1.royalroads.ca.sip > 10.60.100.185.5180: SIP, 
length: 269
        SIP/2.0 100 Trying
        From: <sip:3912...@voip.royalroads.ca>;tag=ac10de2f39520497
        To: <sip:2507018373@10.60.0.10:5060>;tag=6e1b873eba
        Call-Id: 55fe4dd023300b8e
        Cseq: 9917 INVITE
        Via: SIP/2.0/UDP 10.60.100.185:5180;branch=z9hG4bKbe89f11b3df41a12
        Content-Length: 0


09:43:20.913700 IP (tos 0x0, ttl  64, id 31506, offset 0, flags [none], proto: 
UDP (17), length: 1216) telecom-1.royalroads.ca.sip > 10.60.0.10.sip: SIP, 
length: 1188
        INVITE sip:2507018373@10.60.0.10:5060;x-sipX-nonat SIP/2.0
        Via: SIP/2.0/UDP 10.60.0.25;branch=z9hG4bK-XX-0557KFD7V1aSnqhHdAuhMRgRVg
        Via: SIP/2.0/UDP 
10.60.100.185:5180;branch=z9hG4bKbe89f11b3df41a12;id=32337-18
        From: <sip:3912...@voip.royalroads.ca>;tag=ac10de2f39520497
        To: <sip:2507018373@10.60.0.10:5060>;tag=6e1b873eba
        Contact: <sip:2555@10.60.100.185:5180;transport=udp;x-sipX-nonat>
        Supported: replaces, timer, path
        P-Early-Media: Supported
        Call-Id: 55fe4dd023300b8e
        Cseq: 9917 INVITE
        User-Agent: Grandstream GXP2000 1.2.5.3
        Max-Forwards: 20
        Allow: 
INVITE,ACK,CANCEL,BYE,NOTIFY,REFER,OPTIONS,INFO,SUBSCRIBE,UPDATE,PRACK,MESSAGE
        Content-Type: application/sdp
        Content-Length: 407
        Date: Wed, 03 Aug 2011 16:43:20 GMT
        X-Sipx-Handled: X10.60.0.25-207.23.111.25

        v=0
        o=2555 8000 8001 IN IP4 10.60.100.185
        s=SIP Call
        c=IN IP4 10.60.100.185
        t=0 0
        m=audio 55224 RTP/AVP 18 0 3 9 2 4 97 8 101
        a=sendonly
        a=rtpmap:18 G729/8000
        a=rtpmap:0 PCMU/8000
        a=rtpmap:3 GSM/8000
        a=rtpmap:9 G722/8000
        a=rtpmap:2 G726-32/8000
        a=rtpmap:4 G723/8000
        a=rtpmap:97 iLBC/8000
        a=fmtp:97 mode=20
        a=rtpmap:8 PCMA/8000
        a=ptime:20
        a=rtpmap:101 telephone-event/8000
        a=fmtp:101 0-11

09:43:20.947987 IP (tos 0x0, ttl 128, id 19904, offset 0, flags [none], proto: 
UDP (17), length: 929) 10.60.0.10.sip > telecom-1.royalroads.ca.sip: SIP, 
length: 901
        SIP/2.0 200 OK
        Via: SIP/2.0/UDP 
10.60.0.25;branch=z9hG4bK-XX-0557KFD7V1aSnqhHdAuhMRgRVg, SIP/2.0/UDP 
10.60.100.185:5180;branch=z9hG4bKbe89f11b3df41a12;id=32337-18
        From: <sip:3912...@voip.royalroads.ca>;tag=ac10de2f39520497
        To: <sip:2507018373@10.60.0.10:5060>;tag=6e1b873eba
        Call-ID: 55fe4dd023300b8e
        CSeq: 9917 INVITE
        Contact: <sip:2507018373@10.60.0.10:5060>
        P-Asserted-Identity: <sip:2507018373@10.60.0.10:5060>
        Server: Patton SN4960 4E48V 00A0BA050AA0 R5.7 2011-05-13 H323 RBS SIP 
M5T SIP Stack/4.0.30.30
        Supported: replaces
        Content-Type: application/sdp
        Content-Length: 308

        v=0
        o=MxSIP 0 337 IN IP4 10.60.0.10
        s=SIP Call
        c=IN IP4 10.60.0.10
        t=0 0
        m=audio 4998 RTP/AVP 18 0 4 8 101
        a=rtpmap:18 G729/8000
        a=rtpmap:0 PCMU/8000
        a=rtpmap:4 G723/8000
        a=rtpmap:8 PCMA/8000
        a=rtpmap:101 telephone-event/8000
        a=fmtp:18 annexb=no
        a=fmtp:4 annexa=yes
        a=fmtp:101 0-11
        a=recvonly

09:43:20.948912 IP (tos 0x0, ttl  64, id 47283, offset 0, flags [none], proto: 
UDP (17), length: 897) telecom-1.royalroads.ca.sip > 10.60.100.185.5180: SIP, 
length: 869
        SIP/2.0 200 OK
        From: <sip:3912...@voip.royalroads.ca>;tag=ac10de2f39520497
        To: <sip:2507018373@10.60.0.10:5060>;tag=6e1b873eba
        Call-Id: 55fe4dd023300b8e
        Cseq: 9917 INVITE
        Contact: <sip:2507018373@10.60.0.10:5060>
        P-Asserted-Identity: <sip:2507018373@10.60.0.10:5060>
        Server: Patton SN4960 4E48V 00A0BA050AA0 R5.7 2011-05-13 H323 RBS SIP 
M5T SIP Stack/4.0.30.30
        Supported: replaces
        Content-Type: application/sdp
        Content-Length: 308
        Date: Wed, 03 Aug 2011 16:43:20 GMT
        Via: SIP/2.0/UDP 
10.60.100.185:5180;branch=z9hG4bKbe89f11b3df41a12;id=32337-18

        v=0
        o=MxSIP 0 337 IN IP4 10.60.0.10
        s=SIP Call
        c=IN IP4 10.60.0.10
        t=0 0
        m=audio 4998 RTP/AVP 18 0 4 8 101
        a=rtpmap:18 G729/8000
        a=rtpmap:0 PCMU/8000
        a=rtpmap:4 G723/8000
        a=rtpmap:8 PCMA/8000
        a=rtpmap:101 telephone-event/8000
        a=fmtp:18 annexb=no
        a=fmtp:4 annexa=yes
        a=fmtp:101 0-11
        a=recvonly

09:43:21.064306 IP (tos 0xc0, ttl 255, id 12134, offset 0, flags [none], proto: 
UDP (17), length: 713) 10.60.100.185.5180 > telecom-1.royalroads.ca.sip: SIP, 
length: 685
        ACK sip:2507018373@10.60.0.10:5060 SIP/2.0
        Via: SIP/2.0/UDP 10.60.100.185:5180;branch=z9hG4bK0c5d7df8d96a82a3
        Route: 
<sip:10.60.0.25:5060;lr;sipXecs-CallDest=AL%2CINT;sipXecs-rs=%2Aauth%7E.%2Afrom%7ENmUxYjg3M2ViYQ%60%60.900_ntap%2Aid%7EMzIzMzctMTg%60%21f691a8d5de2a94fee3f065d000e4edff>
        From: <sip:3912...@voip.royalroads.ca>;tag=ac10de2f39520497
        To: <sip:2507018373@10.60.0.10:5060>;tag=6e1b873eba
        Contact: <sip:2555@10.60.100.185:5180;transport=udp>
        Supported: path
        Call-ID: 55fe4dd023300b8e
        CSeq: 9917 ACK
        User-Agent: Grandstream GXP2000 1.2.5.3
        Max-Forwards: 70
        Allow: 
INVITE,ACK,CANCEL,BYE,NOTIFY,REFER,OPTIONS,INFO,SUBSCRIBE,UPDATE,PRACK,MESSAGE
        Content-Length: 0


09:43:21.065872 IP (tos 0x0, ttl  64, id 31507, offset 0, flags [none], proto: 
UDP (17), length: 659) telecom-1.royalroads.ca.sip > 10.60.0.10.sip: SIP, 
length: 631
        ACK sip:2507018373@10.60.0.10:5060 SIP/2.0
        Via: SIP/2.0/UDP 10.60.0.25;branch=z9hG4bK-XX-055arN9aI_IOFxBbw9`91gxWBQ
        Via: SIP/2.0/UDP 10.60.100.185:5180;branch=z9hG4bK0c5d7df8d96a82a3
        From: <sip:3912...@voip.royalroads.ca>;tag=ac10de2f39520497
        To: <sip:2507018373@10.60.0.10:5060>;tag=6e1b873eba
        Contact: <sip:2555@10.60.100.185:5180;transport=udp;x-sipX-nonat>
        Supported: path
        Call-Id: 55fe4dd023300b8e
        Cseq: 9917 ACK
        User-Agent: Grandstream GXP2000 1.2.5.3
        Max-Forwards: 20
        Allow: 
INVITE,ACK,CANCEL,BYE,NOTIFY,REFER,OPTIONS,INFO,SUBSCRIBE,UPDATE,PRACK,MESSAGE
        Content-Length: 0
        Date: Wed, 03 Aug 2011 16:43:21 GMT


09:43:23.170779 IP (tos 0xc0, ttl 255, id 12135, offset 0, flags [none], proto: 
UDP (17), length: 812) 10.60.100.185.5180 > telecom-1.royalroads.ca.sip: SIP, 
length: 784
        REFER sip:2507018373@10.60.0.10:5060 SIP/2.0
        Via: SIP/2.0/UDP 10.60.100.185:5180;branch=z9hG4bK18de5667e58f5a11
        Route: 
<sip:10.60.0.25:5060;lr;sipXecs-CallDest=AL%2CINT;sipXecs-rs=%2Aauth%7E.%2Afrom%7ENmUxYjg3M2ViYQ%60%60.900_ntap%2Aid%7EMzIzMzctMTg%60%21f691a8d5de2a94fee3f065d000e4edff>
        From: <sip:3912...@voip.royalroads.ca>;tag=ac10de2f39520497
        To: <sip:2507018373@10.60.0.10:5060>;tag=6e1b873eba
        Contact: <sip:2555@10.60.100.185:5180;transport=udp>
        Supported: replaces, path
        Refer-To: <sip:4...@voip.royalroads.ca>
        Referred-By: <sip:2...@voip.royalroads.ca>
        Call-ID: 55fe4dd023300b8e
        CSeq: 9918 REFER
        User-Agent: Grandstream GXP2000 1.2.5.3
        Max-Forwards: 70
        Allow: 
INVITE,ACK,CANCEL,BYE,NOTIFY,REFER,OPTIONS,INFO,SUBSCRIBE,UPDATE,PRACK,MESSAGE
        Content-Length: 0


09:43:23.172150 IP (tos 0x0, ttl  64, id 47284, offset 0, flags [none], proto: 
UDP (17), length: 522) telecom-1.royalroads.ca.sip > 10.60.100.185.5180: SIP, 
length: 494
        SIP/2.0 407 Proxy Authentication Required
        From: <sip:3912...@voip.royalroads.ca>;tag=ac10de2f39520497
        To: <sip:2507018373@10.60.0.10:5060>;tag=6e1b873eba
        Call-Id: 55fe4dd023300b8e
        Cseq: 9918 REFER
        Via: SIP/2.0/UDP 10.60.100.185:5180;branch=z9hG4bK18de5667e58f5a11
        Proxy-Authenticate: Digest realm="voip.royalroads.ca", 
nonce="e5e1293ea49d99e98140d4435d81339d4e397aab", qop="auth"
        Server: sipXecs/4.2.1 sipXecs/sipXproxy (Linux)
        Date: Wed, 03 Aug 2011 16:43:23 GMT
        Content-Length: 0


09:43:23.271468 IP (tos 0xc0, ttl 255, id 12136, offset 0, flags [none], proto: 
UDP (17), length: 1083) 10.60.100.185.5180 > telecom-1.royalroads.ca.sip: SIP, 
length: 1055
        REFER sip:2507018373@10.60.0.10:5060 SIP/2.0
        Via: SIP/2.0/UDP 10.60.100.185:5180;branch=z9hG4bK8bce6c77e3572ef9
        Route: 
<sip:10.60.0.25:5060;lr;sipXecs-CallDest=AL%2CINT;sipXecs-rs=%2Aauth%7E.%2Afrom%7ENmUxYjg3M2ViYQ%60%60.900_ntap%2Aid%7EMzIzMzctMTg%60%21f691a8d5de2a94fee3f065d000e4edff>
        From: <sip:3912...@voip.royalroads.ca>;tag=ac10de2f39520497
        To: <sip:2507018373@10.60.0.10:5060>;tag=6e1b873eba
        Contact: <sip:2555@10.60.100.185:5180;transport=udp>
        Supported: replaces, path
        Refer-To: <sip:4...@voip.royalroads.ca>
        Referred-By: <sip:2...@voip.royalroads.ca>
        Proxy-Authorization: Digest username="2555", 
realm="voip.royalroads.ca", algorithm=MD5, 
uri="sip:2507018373@10.60.0.10:5060", qop=auth, nc=00000001, 
cnonce="f7dc65bc25ded4ad", nonce="e5e1293ea49d99e98140d4435d81339d4e397aab", 
response="7b046ce83640338c8a12f4132dd7dc8d"
        Call-ID: 55fe4dd023300b8e
        CSeq: 9919 REFER
        User-Agent: Grandstream GXP2000 1.2.5.3
        Max-Forwards: 70
        Allow: 
INVITE,ACK,CANCEL,BYE,NOTIFY,REFER,OPTIONS,INFO,SUBSCRIBE,UPDATE,PRACK,MESSAGE
        Content-Length: 0


09:43:23.273320 IP (tos 0x0, ttl  64, id 31508, offset 0, flags [none], proto: 
UDP (17), length: 1206) telecom-1.royalroads.ca.sip > 10.60.0.10.sip: SIP, 
length: 1178
        REFER sip:2507018373@10.60.0.10:5060 SIP/2.0
        Via: SIP/2.0/UDP 10.60.0.25;branch=z9hG4bK-XX-055dgsiakvXo0YpHssImkADa7A
        Via: SIP/2.0/UDP 
10.60.100.185:5180;branch=z9hG4bK8bce6c77e3572ef9;id=32337-18
        From: <sip:3912...@voip.royalroads.ca>;tag=ac10de2f39520497
        To: <sip:2507018373@10.60.0.10:5060>;tag=6e1b873eba
        Contact: <sip:2555@10.60.100.185:5180;transport=udp;x-sipX-nonat>
        Supported: replaces, path
        Refer-To: 
<sip:4...@voip.royalroads.ca?X-sipX-Authidentity=%3Csip%3A2555%40voip.royalroads.ca%3Bsignature%3D4E397AAB%253A%253A47aee97d79bcd16cd483c0011cef2b47%3E&REFERENCES=55fe4dd023300b8e%3Brel%3Drefer>
        Referred-By: <sip:2...@voip.royalroads.ca>
        Proxy-Authorization: Digest username="2555", 
realm="voip.royalroads.ca", algorithm=MD5, 
uri="sip:2507018373@10.60.0.10:5060", qop=auth, nc=00000001, 
cnonce="f7dc65bc25ded4ad", nonce="e5e1293ea49d99e98140d4435d81339d4e397aab", 
response="7b046ce83640338c8a12f4132dd7dc8d"
        Call-Id: 55fe4dd023300b8e
        Cseq: 9919 REFER
        User-Agent: Grandstream GXP2000 1.2.5.3
        Max-Forwards: 20
        Allow: 
INVITE,ACK,CANCEL,BYE,NOTIFY,REFER,OPTIONS,INFO,SUBSCRIBE,UPDATE,PRACK,MESSAGE
        Content-Length: 0
        Date: Wed, 03 Aug 2011 16:43:23 GMT


09:43:23.279406 IP (tos 0x0, ttl 128, id 19929, offset 0, flags [none], proto: 
UDP (17), length: 517) 10.60.0.10.sip > telecom-1.royalroads.ca.sip: SIP, 
length: 489
        SIP/2.0 202 Accepted
        Via: SIP/2.0/UDP 
10.60.0.25;branch=z9hG4bK-XX-055dgsiakvXo0YpHssImkADa7A, SIP/2.0/UDP 
10.60.100.185:5180;branch=z9hG4bK8bce6c77e3572ef9;id=32337-18
        From: <sip:3912...@voip.royalroads.ca>;tag=ac10de2f39520497
        To: <sip:2507018373@10.60.0.10:5060>;tag=6e1b873eba
        Call-ID: 55fe4dd023300b8e
        CSeq: 9919 REFER
        Contact: <sip:2507018373@10.60.0.10:5060>
        Server: Patton SN4960 4E48V 00A0BA050AA0 R5.7 2011-05-13 H323 RBS SIP 
M5T SIP Stack/4.0.30.30
        Content-Length: 0


09:43:23.280016 IP (tos 0x0, ttl  64, id 47285, offset 0, flags [none], proto: 
UDP (17), length: 485) telecom-1.royalroads.ca.sip > 10.60.100.185.5180: SIP, 
length: 457
        SIP/2.0 202 Accepted
        From: <sip:3912...@voip.royalroads.ca>;tag=ac10de2f39520497
        To: <sip:2507018373@10.60.0.10:5060>;tag=6e1b873eba
        Call-Id: 55fe4dd023300b8e
        Cseq: 9919 REFER
        Contact: <sip:2507018373@10.60.0.10:5060>
        Server: Patton SN4960 4E48V 00A0BA050AA0 R5.7 2011-05-13 H323 RBS SIP 
M5T SIP Stack/4.0.30.30
        Content-Length: 0
        Date: Wed, 03 Aug 2011 16:43:23 GMT
        Via: SIP/2.0/UDP 
10.60.100.185:5180;branch=z9hG4bK8bce6c77e3572ef9;id=32337-18


09:43:23.284497 IP (tos 0x0, ttl 128, id 19939, offset 0, flags [none], proto: 
UDP (17), length: 797) 10.60.0.10.sip > telecom-1.royalroads.ca.sip: SIP, 
length: 769
        NOTIFY sip:2555@10.60.100.185:5180;transport=udp;x-sipX-nonat SIP/2.0
        Via: SIP/2.0/UDP 10.60.0.10:5060;branch=z9hG4bK74ae3f70fc463930c
        Route: 
<sip:10.60.0.25:5060;lr;sipXecs-CallDest=AL%2cINT;sipXecs-rs=*auth~.*from~NmUxYjg3M2ViYQ%60%60.900_ntap*id~MzIzMzctMTg%60!f691a8d5de2a94fee3f065d000e4edff;x-sipX-done>
        Max-Forwards: 70
        From: <sip:2507018373@10.60.0.10:5060>;tag=6e1b873eba
        To: <sip:3912...@voip.royalroads.ca>;tag=ac10de2f39520497
        Call-ID: 55fe4dd023300b8e
        CSeq: 23059 NOTIFY
        Contact: <sip:2507018373@10.60.0.10:5060>
        Event: refer;id=9919
        Subscription-State: pending;expires=60
        User-Agent: Patton SN4960 4E48V 00A0BA050AA0 R5.7 2011-05-13 H323 RBS 
SIP M5T SIP Stack/4.0.30.30
        Content-Type: message/sipfrag
        Content-Length: 20

        SIP/2.0 100 Trying

09:43:23.285938 IP (tos 0x0, ttl  64, id 47286, offset 0, flags [none], proto: 
UDP (17), length: 757) telecom-1.royalroads.ca.sip > 10.60.100.185.5180: SIP, 
length: 729
        NOTIFY sip:2555@10.60.100.185:5180;transport=udp;x-sipX-nonat SIP/2.0
        Via: SIP/2.0/UDP 10.60.0.25;branch=z9hG4bK-XX-0560oS3F_EYOwW1hMAiQIfvKDg
        Via: SIP/2.0/UDP 
10.60.0.10:5060;branch=z9hG4bK74ae3f70fc463930c;id=32337-18
        Max-Forwards: 20
        From: <sip:2507018373@10.60.0.10:5060>;tag=6e1b873eba
        To: <sip:3912...@voip.royalroads.ca>;tag=ac10de2f39520497
        Call-Id: 55fe4dd023300b8e
        Cseq: 23059 NOTIFY
        Contact: <sip:2507018373@10.60.0.10:5060;x-sipX-nonat>
        Event: refer;id=9919
        Subscription-State: pending;expires=60
        User-Agent: Patton SN4960 4E48V 00A0BA050AA0 R5.7 2011-05-13 H323 RBS 
SIP M5T SIP Stack/4.0.30.30
        Content-Type: message/sipfrag
        Content-Length: 20
        Date: Wed, 03 Aug 2011 16:43:23 GMT

        SIP/2.0 100 Trying

09:43:23.323088 IP (tos 0x0, ttl 128, id 19975, offset 0, flags [none], proto: 
UDP (17), length: 851) 10.60.0.10.sip > telecom-1.royalroads.ca.sip: SIP, 
length: 823
        INVITE sip:4...@voip.royalroads.ca SIP/2.0
        Via: SIP/2.0/UDP 10.60.0.10:5060;branch=z9hG4bK3ff5c69919674fb92
        Max-Forwards: 70
        From: <sip:2507018373@10.60.0.10:5060>;tag=c2c3e70979
        To: <sip:4...@voip.royalroads.ca>
        Call-ID: 98cffc5f45c1688d
        CSeq: 1249 INVITE
        Contact: <sip:2507018373@10.60.0.10:5060>
        P-Asserted-Identity: <sip:2507018373@10.60.0.10:5060>
        Supported: replaces
        User-Agent: Patton SN4960 4E48V 00A0BA050AA0 R5.7 2011-05-13 H323 RBS 
SIP M5T SIP Stack/4.0.30.30
        Content-Type: application/sdp
        Content-Length: 287

        v=0
        o=MxSIP 0 338 IN IP4 10.60.0.10
        s=SIP Call
        c=IN IP4 10.60.0.10
        t=0 0
        m=audio 5000 RTP/AVP 18 0 8 4 101
        a=rtpmap:18 G729/8000
        a=rtpmap:0 PCMU/8000
        a=rtpmap:8 PCMA/8000
        a=rtpmap:4 G723/8000
        a=rtpmap:101 telephone-event/8000
        a=fmtp:18 annexb=no
        a=fmtp:101 0-16
        a=sendrecv

09:43:23.323771 IP (tos 0x0, ttl  64, id 31509, offset 0, flags [none], proto: 
UDP (17), length: 271) telecom-1.royalroads.ca.sip > 10.60.0.10.sip: SIP, 
length: 243
        SIP/2.0 100 Trying
        From: <sip:2507018373@10.60.0.10:5060>;tag=c2c3e70979
        To: <sip:4...@voip.royalroads.ca>
        Call-Id: 98cffc5f45c1688d
        Cseq: 1249 INVITE
        Via: SIP/2.0/UDP 10.60.0.10:5060;branch=z9hG4bK3ff5c69919674fb92
        Content-Length: 0


09:43:23.333606 IP (tos 0x0, ttl  64, id 31510, offset 0, flags [none], proto: 
UDP (17), length: 582) telecom-1.royalroads.ca.sip > 10.60.0.10.sip: SIP, 
length: 554
        SIP/2.0 407 Proxy Authentication Required
        Record-Route: <sip:10.60.0.25:5060;lr;sipXecs-CallDest=CUST;x-sipX-done>
        From: <sip:2507018373@10.60.0.10:5060>;tag=c2c3e70979
        To: <sip:4...@voip.royalroads.ca>;tag=FfJ43t
        Call-Id: 98cffc5f45c1688d
        Cseq: 1249 INVITE
        Via: SIP/2.0/UDP 10.60.0.10:5060;branch=z9hG4bK3ff5c69919674fb92
        Proxy-Authenticate: Digest realm="voip.royalroads.ca", 
nonce="904e2e73259a36fcf2bd7c9e83677f954e397aab", qop="auth"
        Server: sipXecs/4.2.1 sipXecs/sipXproxy (Linux)
        Date: Wed, 03 Aug 2011 16:43:23 GMT
        Content-Length: 0


09:43:23.335819 IP (tos 0x0, ttl 128, id 19987, offset 0, flags [none], proto: 
UDP (17), length: 417) 10.60.0.10.sip > telecom-1.royalroads.ca.sip: SIP, 
length: 389
        ACK sip:4...@voip.royalroads.ca SIP/2.0
        Via: SIP/2.0/UDP 10.60.0.10:5060;branch=z9hG4bK3ff5c69919674fb92
        Max-Forwards: 70
        From: <sip:2507018373@10.60.0.10:5060>;tag=c2c3e70979
        To: <sip:4...@voip.royalroads.ca>;tag=FfJ43t
        Call-ID: 98cffc5f45c1688d
        CSeq: 1249 ACK
        User-Agent: Patton SN4960 4E48V 00A0BA050AA0 R5.7 2011-05-13 H323 RBS 
SIP M5T SIP Stack/4.0.30.30
        Content-Length: 0


09:43:23.387541 IP (tos 0x0, ttl  64, id 47287, offset 0, flags [none], proto: 
UDP (17), length: 757) telecom-1.royalroads.ca.sip > 10.60.100.185.5180: SIP, 
length: 729
        NOTIFY sip:2555@10.60.100.185:5180;transport=udp;x-sipX-nonat SIP/2.0
        Via: SIP/2.0/UDP 10.60.0.25;branch=z9hG4bK-XX-0560oS3F_EYOwW1hMAiQIfvKDg
        Via: SIP/2.0/UDP 
10.60.0.10:5060;branch=z9hG4bK74ae3f70fc463930c;id=32337-18
        Max-Forwards: 20
        From: <sip:2507018373@10.60.0.10:5060>;tag=6e1b873eba
        To: <sip:3912...@voip.royalroads.ca>;tag=ac10de2f39520497
        Call-Id: 55fe4dd023300b8e
        Cseq: 23059 NOTIFY
        Contact: <sip:2507018373@10.60.0.10:5060;x-sipX-nonat>
        Event: refer;id=9919
        Subscription-State: pending;expires=60
        User-Agent: Patton SN4960 4E48V 00A0BA050AA0 R5.7 2011-05-13 H323 RBS 
SIP M5T SIP Stack/4.0.30.30
        Content-Type: message/sipfrag
        Content-Length: 20
        Date: Wed, 03 Aug 2011 16:43:23 GMT

        SIP/2.0 100 Trying

09:43:23.402411 IP (tos 0xc0, ttl 255, id 12137, offset 0, flags [none], proto: 
UDP (17), length: 588) 10.60.100.185.5180 > telecom-1.royalroads.ca.sip: SIP, 
length: 560
        SIP/2.0 200 OK
        Via: SIP/2.0/UDP 10.60.0.25;branch=z9hG4bK-XX-0560oS3F_EYOwW1hMAiQIfvKDg
        Via: SIP/2.0/UDP 
10.60.0.10:5060;branch=z9hG4bK74ae3f70fc463930c;id=32337-18
        From: <sip:2507018373@10.60.0.10:5060>;tag=6e1b873eba
        To: <sip:3912...@voip.royalroads.ca>;tag=ac10de2f39520497
        Call-ID: 55fe4dd023300b8e
        CSeq: 23059 NOTIFY
        User-Agent: Grandstream GXP2000 1.2.5.3
        Contact: <sip:2555@10.60.100.185:5180;transport=udp>
        Allow: 
INVITE,ACK,CANCEL,BYE,NOTIFY,REFER,OPTIONS,INFO,SUBSCRIBE,UPDATE,PRACK,MESSAGE
        Supported: replaces, timer
        Content-Length: 0


09:43:23.402898 IP (tos 0x0, ttl  64, id 31511, offset 0, flags [none], proto: 
UDP (17), length: 551) telecom-1.royalroads.ca.sip > 10.60.0.10.sip: SIP, 
length: 523
        SIP/2.0 200 OK
        Via: SIP/2.0/UDP 
10.60.0.10:5060;branch=z9hG4bK74ae3f70fc463930c;id=32337-18
        From: <sip:2507018373@10.60.0.10:5060>;tag=6e1b873eba
        To: <sip:3912...@voip.royalroads.ca>;tag=ac10de2f39520497
        Call-Id: 55fe4dd023300b8e
        Cseq: 23059 NOTIFY
        User-Agent: Grandstream GXP2000 1.2.5.3
        Contact: <sip:2555@10.60.100.185:5180;transport=udp>
        Allow: 
INVITE,ACK,CANCEL,BYE,NOTIFY,REFER,OPTIONS,INFO,SUBSCRIBE,UPDATE,PRACK,MESSAGE
        Supported: replaces, timer
        Content-Length: 0
        Date: Wed, 03 Aug 2011 16:43:23 GMT


09:43:23.463415 IP (tos 0xc0, ttl 255, id 12138, offset 0, flags [none], proto: 
UDP (17), length: 588) 10.60.100.185.5180 > telecom-1.royalroads.ca.sip: SIP, 
length: 560
        SIP/2.0 200 OK
        Via: SIP/2.0/UDP 10.60.0.25;branch=z9hG4bK-XX-0560oS3F_EYOwW1hMAiQIfvKDg
        Via: SIP/2.0/UDP 
10.60.0.10:5060;branch=z9hG4bK74ae3f70fc463930c;id=32337-18
        From: <sip:2507018373@10.60.0.10:5060>;tag=6e1b873eba
        To: <sip:3912...@voip.royalroads.ca>;tag=ac10de2f39520497
        Call-ID: 55fe4dd023300b8e
        CSeq: 23059 NOTIFY
        User-Agent: Grandstream GXP2000 1.2.5.3
        Contact: <sip:2555@10.60.100.185:5180;transport=udp>
        Allow: 
INVITE,ACK,CANCEL,BYE,NOTIFY,REFER,OPTIONS,INFO,SUBSCRIBE,UPDATE,PRACK,MESSAGE
        Supported: replaces, timer
        Content-Length: 0


09:43:26.682031 IP (tos 0xc0, ttl 255, id 12139, offset 0, flags [none], proto: 
UDP (17), length: 964) 10.60.100.185.5180 > telecom-1.royalroads.ca.sip: SIP, 
length: 936
        BYE sip:2507018373@10.60.0.10:5060 SIP/2.0
        Via: SIP/2.0/UDP 10.60.100.185:5180;branch=z9hG4bK1a04c5b0d0affbf4
        Route: 
<sip:10.60.0.25:5060;lr;sipXecs-CallDest=AL%2CINT;sipXecs-rs=%2Aauth%7E.%2Afrom%7ENmUxYjg3M2ViYQ%60%60.900_ntap%2Aid%7EMzIzMzctMTg%60%21f691a8d5de2a94fee3f065d000e4edff>
        From: <sip:3912...@voip.royalroads.ca>;tag=ac10de2f39520497
        To: <sip:2507018373@10.60.0.10:5060>;tag=6e1b873eba
        Supported: path
        Proxy-Authorization: Digest username="2555", 
realm="voip.royalroads.ca", algorithm=MD5, 
uri="sip:2507018373@10.60.0.10:5060", qop=auth, nc=00000002, 
cnonce="7c13477b438dceca", nonce="e5e1293ea49d99e98140d4435d81339d4e397aab", 
response="97625e5f9d50c6b0aa956fb87b12201b"
        Call-ID: 55fe4dd023300b8e
        CSeq: 9920 BYE
        User-Agent: Grandstream GXP2000 1.2.5.3
        Max-Forwards: 70
        Allow: 
INVITE,ACK,CANCEL,BYE,NOTIFY,REFER,OPTIONS,INFO,SUBSCRIBE,UPDATE,PRACK,MESSAGE
        Reason: SIP ;text="Onhook event"
        Content-Length: 0


09:43:26.683811 IP (tos 0x0, ttl  64, id 31512, offset 0, flags [none], proto: 
UDP (17), length: 897) telecom-1.royalroads.ca.sip > 10.60.0.10.sip: SIP, 
length: 869
        BYE sip:2507018373@10.60.0.10:5060 SIP/2.0
        Via: SIP/2.0/UDP 10.60.0.25;branch=z9hG4bK-XX-056aoHWgyR5xPYhvWLjS08dtSg
        Via: SIP/2.0/UDP 10.60.100.185:5180;branch=z9hG4bK1a04c5b0d0affbf4
        From: <sip:3912...@voip.royalroads.ca>;tag=ac10de2f39520497
        To: <sip:2507018373@10.60.0.10:5060>;tag=6e1b873eba
        Supported: path
        Proxy-Authorization: Digest username="2555", 
realm="voip.royalroads.ca", algorithm=MD5, 
uri="sip:2507018373@10.60.0.10:5060", qop=auth, nc=00000002, 
cnonce="7c13477b438dceca", nonce="e5e1293ea49d99e98140d4435d81339d4e397aab", 
response="97625e5f9d50c6b0aa956fb87b12201b"
        Call-Id: 55fe4dd023300b8e
        Cseq: 9920 BYE
        User-Agent: Grandstream GXP2000 1.2.5.3
        Max-Forwards: 20
        Allow: 
INVITE,ACK,CANCEL,BYE,NOTIFY,REFER,OPTIONS,INFO,SUBSCRIBE,UPDATE,PRACK,MESSAGE
        Reason: SIP ;text="Onhook event"
        Content-Length: 0
        Date: Wed, 03 Aug 2011 16:43:26 GMT


09:43:26.688572 IP (tos 0x0, ttl 128, id 20044, offset 0, flags [none], proto: 
UDP (17), length: 454) 10.60.0.10.sip > telecom-1.royalroads.ca.sip: SIP, 
length: 426
        SIP/2.0 200 OK
        Via: SIP/2.0/UDP 
10.60.0.25;branch=z9hG4bK-XX-056aoHWgyR5xPYhvWLjS08dtSg, SIP/2.0/UDP 
10.60.100.185:5180;branch=z9hG4bK1a04c5b0d0affbf4
        From: <sip:3912...@voip.royalroads.ca>;tag=ac10de2f39520497
        To: <sip:2507018373@10.60.0.10:5060>;tag=6e1b873eba
        Call-ID: 55fe4dd023300b8e
        CSeq: 9920 BYE
        Server: Patton SN4960 4E48V 00A0BA050AA0 R5.7 2011-05-13 H323 RBS SIP 
M5T SIP Stack/4.0.30.30
        Content-Length: 0


09:43:26.689011 IP (tos 0x0, ttl  64, id 47288, offset 0, flags [none], proto: 
UDP (17), length: 422) telecom-1.royalroads.ca.sip > 10.60.100.185.5180: SIP, 
length: 394
        SIP/2.0 200 OK
        From: <sip:3912...@voip.royalroads.ca>;tag=ac10de2f39520497
        To: <sip:2507018373@10.60.0.10:5060>;tag=6e1b873eba
        Call-Id: 55fe4dd023300b8e
        Cseq: 9920 BYE
        Server: Patton SN4960 4E48V 00A0BA050AA0 R5.7 2011-05-13 H323 RBS SIP 
M5T SIP Stack/4.0.30.30
        Content-Length: 0
        Date: Wed, 03 Aug 2011 16:43:26 GMT
        Via: SIP/2.0/UDP 10.60.100.185:5180;branch=z9hG4bK1a04c5b0d0affbf4
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