Sip Call Routing Examples - AudioCodes Mediant 800 MSBG User Manual

SIP User's Manual
8.3.9

SIP Call Routing Examples

8.3.9.1 SIP Call Flow Example
The SIP call flow (shown in the following figure), describes SIP messages exchanged
between two devices during a basic call. In this call flow example, device (10.8.201.158)
with phone number '6000' dials device (10.8.201.161) with phone number '2000'.
F1 INVITE (10.8.201.108 >> 10.8.201.161):
INVITE sip:2000@10.8.201.161;user=phone SIP/2.0
Via: SIP/2.0/UDP 10.8.201.108;branch=z9hG4bKacsiJkDGd
From: <sip:6000@10.8.201.108>;tag=1c5354
To: <sip:2000@10.8.201.161>
Call-ID: 534366556655skKw-6000--2000@10.8.201.108
CSeq: 18153 INVITE
Contact: <sip:8000@10.8.201.108;user=phone>
User-Agent: Audiocodes-Sip-Gateway/Mediant 800 MSBG/v.6.00.010.006
Supported: 100rel,em
Allow: REGISTER,OPTIONS,INVITE,ACK,CANCEL,BYE,
NOTIFY,PRACK,REFER,INFO
Content-Type: application/sdp
Content-Length: 208
v=0
o=AudiocodesGW 18132 74003 IN IP4 10.8.201.108
s=Phone-Call
c=IN IP4 10.8.201.108
t=0 0
Version 6.2
Figure 8-34: SIP Call Flow
469
8. IP Telephony Capabilities
February 2011