Untitled

INVITE sip:2000@81.187.132.4:5060 SIP/2.0
Via: SIP/2.0/UDP 81.187.132.26:5060;branch=z9hG4bK-ec8ece7c
From: spa3k line <sip:spa-fxo@81.187.132.4>;tag=8f4565e747cd8c44o1
To: <sip:2000@81.187.132.4:5060>
Call-ID: 5477e4e3-5f6b978@81.187.132.26
CSeq: 101 INVITE
Max-Forwards: 70
Contact: spa3k line <sip:spa-fxo@81.187.132.26:5060>
Expires: 240
User-Agent: Linksys/SPA3000-3.1.10(GWd)
Content-Length: 442
Allow: ACK, BYE, CANCEL, INFO, INVITE, NOTIFY, OPTIONS, REFER
Supported: x-sipura
Content-Type: application/sdp

v=0
o=- 24192 24192 IN IP4 81.187.132.26
s=-
c=IN IP4 81.187.132.26
t=0 0
m=audio 16478 RTP/AVP 0 2 4 8 18 96 97 98 100 101
a=rtpmap:0 PCMU/8000
a=rtpmap:2 G726-32/8000
a=rtpmap:4 G723/8000
a=rtpmap:8 PCMA/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:100 NSE/8000
a=fmtp:100 192-193
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-15
a=ptime:30
a=sendrecv
caller id is: spa-fxo