Technical Manual
U-SYS MRS6100 Media Resource Server
Chapter 5 MGCP and SIP
Huawei Technologies Proprietary
5-56
Content-Length: 214
Content-Type: application/sdp
Via: SIP/2.0/UDP 182.20.62.2:5060
User-Agent: MRS6100 DP
v=0
o=TestTeam 4000 4000 IN IP4 182.20.62.2
s=phone-call
c=IN IP4 182.20.70.2
t=0 0
m=audio 8000 RTP/AVP 0 4 8 96 97
a=rtpmap:96 telephone-event/8000/1
a=rtpmap:97 red/8000/1
a=ptime:20
a=x-ssrc:00a6a390
For interpretation of each line, refer to "Request message parameters" in Section
5.3.5 1, "Request messages".
Event 2: MRS6100 returns a 100 Trying response to AS, to notify it that MRS6100 has
received and is processing the request.
SIP/2.0 100 Trying
From: <sip:1@182.20.62.2>;tag=8000
To: <sip:annc.BAU.pa%28an%3dfile%3a//welcome4%29@182.20.60.1>
CSeq: 10 INVITE
Call-ID: 4000@182.20.62.2
Via: SIP/2.0/UDP 182.20.62.2:5060
Content-Length: 0
Event 3: MRS6100 sends 180 Ringing to AS, and then AS forwards it to the remote
caller SIP entity.
SIP/2.0 180 Ringing
From: <sip:1@182.20.62.2>;tag=8000
To:<sip:annc.BAU.pa%28an%3dfile%3a//welcome4%29@182.20.60.1>;tag=1a1e0a
19
CSeq: 10 INVITE
Call-ID: 4000@182.20.62.2
Via: SIP/2.0/UDP 182.20.62.2:5060
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