1. .....
2. .....
3. .....
4.    Call-ID: 267adcfe-41f9-1237-a3b5-96b7153df19c
5.    CSeq: 128965643 INVITE
6.    Contact: <sip:gw+05b0a307-7d63-4c3e-990f-9e3c0280a661@10.3.3.53:5060;transport=udp;gw=05b0a307-7d63-4c3e-990f-9e3c0280a661>
7.    User-Agent: FreeSWITCH
8.    Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, INFO, UPDATE, REGISTER, REFER, NOTIFY, PUBLISH, SUBSCRIBE
9.    Supported: timer, path, replaces
10.    Allow-Events: talk, hold, conference, presence, as-feature-event, dialog, line-seize, call-info, sla, include-session-description, presence.winfo, message-summary, refer
11.    Content-Type: application/sdp
12.    Content-Disposition: session
13.    Content-Length: 896
14.    X-accountcode: voice.polarisnetworks.ca
15.    X-FS-Support: update_display,send_info
16.    Remote-Party-ID: ******
17.  
18.    v=0
19.    o=FreeSWITCH 1538582118 1538582119 IN IP4 10.3.3.53
20.    s=FreeSWITCH
21.    c=IN IP4 10.3.3.53
22.    t=0 0
23.    m=audio 21296 RTP/AVP 8 101 13 104 105 106 107
24.    a=rtpmap:8 PCMA/8000
25.    a=rtpmap:101 telephone-event/8000
26.    a=fmtp:101 0-16
27.    a=rtpmap:13 CN/8000
28.    a=rtpmap:104 telephone-event/32000
29.    a=fmtp:104 0-16
30.    a=rtpmap:105 CN/32000
31.    a=rtpmap:106 telephone-event/16000
32.    a=fmtp:106 0-16
33.    a=rtpmap:107 CN/16000
34.    a=ptime:30
35.    m=audio 21296 RTP/AVP 0 8 102 103 9 3 101 13 104 105 106 107
36.    a=rtpmap:0 PCMU/8000
37.    a=rtpmap:8 PCMA/8000
38.    a=rtpmap:102 G7221/32000
39.    a=fmtp:102 bitrate=48000
40.    a=rtpmap:103 G7221/16000
41.    a=fmtp:103 bitrate=32000
42.    a=rtpmap:9 G722/8000
43.    a=rtpmap:3 GSM/8000
44.    a=rtpmap:101 telephone-event/8000
45.    a=fmtp:101 0-16
46.    a=rtpmap:13 CN/8000
47.    a=rtpmap:104 telephone-event/32000
48.    a=fmtp:104 0-16
49.    a=rtpmap:105 CN/32000
50.    a=rtpmap:106 telephone-event/16000
51.    a=fmtp:106 0-16
52.    a=rtpmap:107 CN/16000
53.    a=ptime:20
54.    ------------------------------------------------------------------------
55.