I am afraid you didn't understand what the problem is...
So,
When I' m sending the media Description in multiple lines ���
Media Description, name and address (m): audio 2074 RTP/AVP 0
Media Description, name and address (m): audio 2074 RTP/AVP 8
the messenger (you can see from the trace) responds
1) m=audio 58772 RTP/AVP 0
� �a=rtpmap:0 PCMU/8000
So this is a payload Type of "0" (G711ulaw) with an RTP port of 58772
AND
2) m=audio 0 RTP/AVP 0
And this is a Payload Type "0" (G711ulaw), also but with an RTP port of 0
Moreover there is only one machine.
However, changing my implementation, I am sending the Media Descriptors in one line, that means....
m=audio RTP/AVP 0 8
and it responds OK
m=audio 42634 RTP/AVP 0 8
a=rtpmap:0 PCMU/8000
a=rtpmap:8 PCMA/8000
Is it something wrong or it's my idea.
Any advice will be appreciated.
Thanks.
Kedar Patil wrote:
RE: [Sip-implementors] MSN Messenger call problem The RTP port that UAC sends in INVITE is its UDP port where it will receive the RTP packets.
The RTP port that UAS sends in 200OK is its UDP port where it would like to receive RTP packets.So it is most likely that the two ports are different (because they are on two different machines
and are allocated independent of each other).Does this answer your doubt or I misunderstood your question?
thanks,
= Kedar =
> -----Original Message-----
> From: Paraskevopoulos Pavlos [mailto:[EMAIL PROTECTED]]
> Sent: Wednesday, December 18, 2002 8:44 AM
> To: sip-implementors
> Subject: [Sip-implementors] MSN Messenger call problem
>
>
> 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.
>
> \\\\\\|//////
> \\ - - //
> ( @ @ )
> ---oOOo-(_)-oOOo------------------------------------
> * Paraskevopoulos Pavlos.��� tel +30 1 66 74 342
> * Senior Software Engineer.���� fax +30 1 68 74 446
> * MailTo : [EMAIL PROTECTED]
> *
> * RESEARCH & DEVELOPMENT GENERAL DIVISION
> * TERMINAL EQUIPMENT DEPARTMENT
> *
> * INTRACOM S.A.���� http://www.intracom.gr
> *----------------------------------------------------
> * HELLENIC TELECOMMUNICATIONS & ELECTRONICS INDUSTRY
> * Markopoulou Ave, 190 02 Peania,
> * Greece
> ----------Oooo-------------------------------------------
> oooO ( )
> ( ) ) /
> \ ( (_/
> \_)
>
>
>
> _______________________________________________
> Sip-implementors mailing list
> [EMAIL PROTECTED]
> http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
>
