User`s manual

Table Of Contents
SIP User's Manual 8. Telephony Capabilities
Version 5.0 223 October 2006
8.12 SIP Call Flow Example
The SIP call flow, shown in Figure 8-2, describes SIP messages exchanged between a
Mediant 2000 gateway and an MP-108 gateway during a simple call. MP-108
(10.8.201.108) with phone number ‘8000’, calls Mediant 2000 (10.8.201.10) with phone
number ‘1000’:
Figure 8-2: SIP Call Flow Example
F1 10.8.201.108 ==> 10.8.201.10 INVITE
INVITE sip:1000@10.8.201.10;user=phone SIP/2.0
Via: SIP/2.0/UDP 10.8.201.108;branch=z9hG4bKacsiJkDGd
From: <sip:8000@10.8.201.108>;tag=1c5354
To: <sip:1000@10.8.201.10>
Call-ID: 534366556655skKw-8000--1000@10.8.201.108
CSeq: 18153 INVITE
Contact: <sip:8000@10.8.201.108;user=phone>
User-Agent: Audiocodes-Sip-Gateway/MP-108 FXS/v.4.20.299.410
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
m=audio 4000 RTP/AVP 8 96
a=rtpmap:8 pcma/8000
a=rtpmap:96 telephone-event/8000
a=fmtp:96 0-15
a=ptime:20