[Sip-implementors] MSN Messenger call problem

[Paraskevopoulos Pavlos]

Hi,

I try to establish a call with the msn messenger.

Sending the following invite....

Session Initiation Protocol
Request-Line: INVITE sip:146.124.120.221:10891 SIP/2.0
Message Header
Max-Forwards: 10
Record-Route: <sip:[EMAIL PROTECTED];branch=0>
Via: SIP/2.0/UDP 146.124.20.189;branch=z9hG4bKb824.76b7a4e3.0
Via: SIP/2.0/UDP 146.124.121.233:5060
From: 4341 <sip:[EMAIL PROTECTED]>;tag=29030
To: <sip:[EMAIL PROTECTED]>
Call-ID: [EMAIL PROTECTED]
CSeq: 1 INVITE
Contact: <sip:[EMAIL PROTECTED]:5060>
Content-Type: application/sdp
User-Agent: netPhone-010104
Content-Length: 147
Session Description Protocol
Session Description, version (v): 0
Owner/Creator, Session Id (o): ppar 2697 2697 IN IP4 146.124.121.233
Session Name (s): Our Conversation
Connection Information (c): IN IP4 146.124.121.233
Time Description, active time (t): 0 0
Media Description, name and address (m): audio 2074 RTP/AVP 0
Media Description, name and address (m): audio 2074 RTP/AVP 8


I get the following 200 response....

Session Initiation Protocol
Status-Line: SIP/2.0 200 OK
Message Header
Via: SIP/2.0/UDP 146.124.20.189;branch=z9hG4bKb824.76b7a4e3.0
Via: SIP/2.0/UDP 146.124.121.233:5060
From: 4341 <sip:[EMAIL PROTECTED]>;tag=29030
To: <sip:[EMAIL PROTECTED]>;tag=5fc8142e-126a-11d7-87a0-00d0596a8d2f
Call-ID: [EMAIL PROTECTED]
CSeq: 1 INVITE
Record-Route: <sip:[EMAIL PROTECTED];branch=0>
Contact: <sip:146.124.120.221:10891>
User-Agent: Windows RTC/1.0
Content-Type: application/sdp
Content-Length: 176
Session Description Protocol
Session Description, version (v): 0
Owner/Creator, Session Id (o): Standard 0 0 IN IP4 146.124.120.221
Session Name (s): Our Conversation
Connection Information (c): IN IP4 146.124.120.221
Bandwidth Information (b): CT:1000
Time Description, active time (t): 0 0
Media Description, name and address (m): audio 58772 RTP/AVP 0
Media Attribute (a): rtpmap:0 PCMU/8000
Media Description, name and address (m): audio 0 RTP/AVP 0


I have a question regarding the Media description part of the SDP body.
I send two media Dscriptions
Media Description, name and address (m): audio 2074 RTP/AVP 0
Media Description, name and address (m): audio 2074 RTP/AVP 8
and the I receive as a response, two media Descriptions with the same payload but with different RTP port to use.

Is there anything wrong with my invitation , or with the setings of MSN messenger?

Thanks in advance.

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* Paraskevopoulos Pavlos. tel +30 1 66 74 342
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