Sicherheitslösungen für SIP, Teil 2

SIP- und SDP-Header

INVITE sip: 32374@207.236.65.226:5060 SIP/2.0
Expires: 180
Content-Type: application/sdp
Via SIP/2.0/UDP 207.236.63.221:5060;branch=1FV1xhfvxGJ0K9rWcKdAKOA
Via: SIP/2.0/UDP 10.80.17.138:5060
To:<sip:32374@207.236.65.226>
From: sip:22347@10.80.17.138
Call-ID: c2943000-50405d-6af10a-382e3031@10.80.17.138
CSeq: 100 INVITE
Contact: sip:22347@10.80.17.138:5060
Content-Length:219
User Agent: Cisco IP Phone/Rev.1/SIP enabled
Accept: application/sdp
Record-Route: <sip:32374@207.236.65.226:5060; maddr=207.236.65.226>

v=0
o=CiscoSystemsSIP -IPPhone-UserAgent 17045 11864 IN IP4 10.80.17.138
s=SIP Call
c=IN IP4 10.80.17.138
t=00
m=audio 29118 RTP/Avp 0 101
a=rtpmap:0 pcmu/8000
a=rtpmap:101 telephone-event/8000