The second part is a description of the destinations
INVITE sip:408013@172.19.32.2 SIP/2.0
Via: SIP/2.0/UDP 10.25.31.2;rport;branch=z9hG4bK8B0SB9eZy1prc
Max-Forwards: 67
From: "9225505506" <sip:9225505506@10.25.31.2>;tag=9mm0j2jvjZ7cS
To: <sip:408013@172.19.32.2>
Call-ID: dd520e0f-a077-1236-f7b7-782bcb49c95a
CSeq: 120086810 INVITE
Contact: <sip:FreeSWITCH@10.25.31.2:5060;transport=udp;gw=dec9b7f0-df69-4837-aa69-47a5d61838bb>
User-Agent: ss.ats99.ru
Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, INFO, UPDATE, REGISTER, REFER, NOTIFY, PUBLISH, SUBSCRIBE
Supported: timer, path, replaces
Allow-Events: talk, hold, conference, presence, as-feature-event, dialog, line-seize, call-info, sla, include-session-description, presence.winfo, message-summary, refer
Content-Type: application/sdp
Content-Disposition: session
Content-Length: 264
X-FS-Support: update_display,send_info
Remote-Party-ID: "9225505506" <sip:9225505506@10.25.31.2>;party=calling;screen=yes;privacy=off
v=0
o=FreeSWITCH 1520828325 1520828326 IN IP4 10.25.31.2
s=FreeSWITCH
c=IN IP4 10.25.31.2
t=0 0
m=audio 17424 RTP/AVP 8 0 101 13
a=rtpmap:8 PCMA/8000
a=rtpmap:0 PCMU/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-16
a=rtpmap:13 CN/8000
a=ptime:20