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Mediant 2000 SIP User’s Manual 8. Gateway Capabilities Description
Version 4.4 153 July 2005
8.11 SIP Call Flow Example
The Call Flow, shown in Figure 8-3, describes SIP messages exchanged between Mediant 2000
gateway and an MP-108 gateway during a simple call.
MP-108 with phone number “8000”, calls Mediant 2000 with phone number “1000”:
Figure
8-3: SIP Call Flow Example
INVITE F1
Trying F2
Ringing F3
200 OK F4
Ack F5
BYE F6
200 OK F7
Mediant 2000
10.8.201.10
MP-108
10.8.201.108
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
Accept-Language: en
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