02:28:17.315593 IP (tos 0x68, ttl 62, id 47666, offset 0, flags [none], proto UDP (17), length 1118)
    10.46.80.60.5063 > 203.25.118.50.5060: SIP, length: 1090
        INVITE sip:998@203.25.118.50 SIP/2.0
        Via: SIP/2.0/UDP 10.46.80.60:5063;branch=z9hG4bK-b70e4687
        From: "500 on 203" <sip:500@203.25.118.50>;tag=fccbaa27c749b507o3
        To: <sip:998@203.25.118.50>
        Call-ID: 186428a7-eb274887@10.46.80.60
        CSeq: 101 INVITE
        Max-Forwards: 70
        Contact: "500 on 203" <sip:500@10.46.80.60:5063>
        Expires: 240
        User-Agent: Cisco/SPA504G-7.6.2d
        Content-Length: 562
        Allow: ACK, BYE, CANCEL, INFO, INVITE, NOTIFY, OPTIONS, PRACK, REFER, UPDATE
        Supported: 100rel, replaces
        Content-Type: application/sdp
        v=0
        o=- 523907 523907 IN IP4 10.46.80.60
        s=-
        c=IN IP4 10.46.80.60
        t=0 0
        m=audio 16384 RTP/SAVP 9 0 8 2 18 96 97 98 101
        a=rtpmap:9 G722/8000
        a=rtpmap:0 PCMU/8000
        a=rtpmap:8 PCMA/8000
        a=rtpmap:2 G726-32/8000
        a=rtpmap:18 G729a/8000
        a=rtpmap:96 G726-40/8000
        a=rtpmap:97 G726-24/8000
        a=rtpmap:98 G726-16/8000
        a=rtpmap:101 telephone-event/8000
        a=fmtp:101 0-15
        a=ptime:30
        a=sendrecv
        a=crypto:1 AES_CM_128_HMAC_SHA1_32 inline:qzlch1PApicmeOkHJnKDp4N0qYf9db0nau6+B+nu
        a=crypto:2 AES_CM_128_HMAC_SHA1_80 inline:qzlch1PApicmeOkHJnKDp4N0qYf9db0nau6+B+nu
02:28:19.314711 IP (tos 0x68, ttl 62, id 47667, offset 0, flags [none], proto UDP (17), length 1118)
    10.46.80.60.5063 > 203.25.118.50.5060: SIP, length: 1090
        INVITE sip:998@203.25.118.50 SIP/2.0
        Via: SIP/2.0/UDP 10.46.80.60:5063;branch=z9hG4bK-b70e4687
        From: "500 on 203" <sip:500@203.25.118.50>;tag=fccbaa27c749b507o3
        To: <sip:998@203.25.118.50>
        Call-ID: 186428a7-eb274887@10.46.80.60
        CSeq: 101 INVITE
        Max-Forwards: 70
        Contact: "500 on 203" <sip:500@10.46.80.60:5063>
        Expires: 240
        User-Agent: Cisco/SPA504G-7.6.2d
        Content-Length: 562
        Allow: ACK, BYE, CANCEL, INFO, INVITE, NOTIFY, OPTIONS, PRACK, REFER, UPDATE
        Supported: 100rel, replaces
        Content-Type: application/sdp
        v=0
        o=- 523907 523907 IN IP4 10.46.80.60
        s=-
        c=IN IP4 10.46.80.60
        t=0 0
        m=audio 16384 RTP/SAVP 9 0 8 2 18 96 97 98 101
        a=rtpmap:9 G722/8000
        a=rtpmap:0 PCMU/8000
        a=rtpmap:8 PCMA/8000
        a=rtpmap:2 G726-32/8000
        a=rtpmap:18 G729a/8000
        a=rtpmap:96 G726-40/8000
        a=rtpmap:97 G726-24/8000
        a=rtpmap:98 G726-16/8000
        a=rtpmap:101 telephone-event/8000
        a=fmtp:101 0-15
        a=ptime:30
        a=sendrecv
        a=crypto:1 AES_CM_128_HMAC_SHA1_32 inline:qzlch1PApicmeOkHJnKDp4N0qYf9db0nau6+B+nu
        a=crypto:2 AES_CM_128_HMAC_SHA1_80 inline:qzlch1PApicmeOkHJnKDp4N0qYf9db0nau6+B+nu
02:28:20.611847 IP (tos 0x68, ttl 62, id 47668, offset 0, flags [none], proto UDP (17), length 516)
    10.46.80.60.5063 > 203.25.118.50.5060: SIP, length: 488
        SUBSCRIBE sip:500@203.25.118.50 SIP/2.0
        Via: SIP/2.0/UDP 10.46.80.60:5063;branch=z9hG4bK-af9fcb38
        From: "500 on 203" <sip:500@203.25.118.50>;tag=e81b1dc16ba5876
        To: "500 on 203" <sip:500@203.25.118.50>
        Call-ID: bdc31dbb-d734a82d@10.46.80.60
        CSeq: 1001 SUBSCRIBE
        Max-Forwards: 70
        Contact: "500 on 203" <sip:500@10.46.80.60:5063>
        Accept: application/x-broadworks-callpark-info+xml
        Expires: 1800
        Event: x-broadworks-callpark
        User-Agent: Cisco/SPA504G-7.6.2d
        Content-Length: 0
02:28:20.902604 IP (tos 0x68, ttl 62, id 47669, offset 0, flags [none], proto UDP (17), length 352)
    10.46.80.60.5063 > 203.25.118.50.5060: SIP, length: 324
        CANCEL sip:998@203.25.118.50 SIP/2.0
        Via: SIP/2.0/UDP 10.46.80.60:5063;branch=z9hG4bK-b70e4687
        From: "500 on 203" <sip:500@203.25.118.50>;tag=fccbaa27c749b507o3
        To: <sip:998@203.25.118.50>
        Call-ID: 186428a7-eb274887@10.46.80.60
        CSeq: 101 CANCEL
        Max-Forwards: 70
        User-Agent: Cisco/SPA504G-7.6.2d
        Content-Length: 0
02:28:20.902823 IP (tos 0x60, ttl 64, id 34420, offset 0, flags [DF], proto UDP (17), length 382)
    203.25.118.50.5060 > 10.46.80.60.5063: SIP, length: 354
        SIP/2.0 481 Call/Transaction Does Not Exist
        Via: SIP/2.0/UDP 10.46.80.60:5063;received=10.46.80.60;branch=z9hG4bK-b70e4687
        Call-ID: 186428a7-eb274887@10.46.80.60
        From: "500 on 203" <sip:500@203.25.118.50>;tag=fccbaa27c749b507o3
        To: <sip:998@203.25.118.50>;tag=z9hG4bK-b70e4687
        CSeq: 101 CANCEL
        Server: FPBX-14.0.3.6(13.22.0)
        Content-Length:  0