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List:       sip-implementors
Subject:    RE: [Sip-implementors] FW: SDP confusion
From:       Attila Sipos <AttilaS () vegastream ! com>
Date:       2003-02-19 7:25:30
Message-ID: CFAC7B538F46D41185C000508BD9312B017792B1 () brack-exch ! bracknell ! pace ! co ! uk
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Hi Jade,

You need to say what profile "101" is.
So, you need to include a line like this:
  a=rtpmap:101 telephone-event/8000

"telephone-event" tells the remote side
that you can receive RFC2833.

So, your SDP will look like this:
      v=0
      o=jade 2890844526 2890842807 IN IP4 11.11.2.2
      s=POI Seminar
      i=A Seminar on how to make Presentations on the Internet
      u=http://www.ee.org
      c=IN IP4 11.11.2.2/127
      m=audio 49170 RTP/AVP 0 101
      a=rtpmap:0 PCMU/8000
      a=rtpmap:101 telephone-event/8000
      a=fmtp:101 0-15


Regards,

Attila

Attila Sipos    
Software Engineer 
<http://www.vegastream.com> 
VegaStream : A World of difference for your Integrated Communications 


> -----Original Message-----
> From: Jade Chen Yan [mailto:jade@tencent.com]
> Sent: 19 February 2003 04:21
> To: Sip-Implementors (E-mail)
> Subject: [Sip-implementors] FW: SDP confusion
> 
> 
> Hi, List,
> 
> In rfc 2833 ,DTMF event  use the same port as audio.
> the SDP will like this:
> 
>       v=0
>       o=jade 2890844526 2890842807 IN IP4 11.11.2.2
>       s=POI Seminar
>       i=A Seminar on how to make Presentations on the Internet
>       u=http://www.ee.org
>       c=IN IP4 11.11.2.2/127
>       m=audio 49170 RTP/AVP 0 101    //101 is the payload 
> type for DTMF
> enent.
>       a=rtpmap:0 PCMU/8000
>       a=fmtp:101 0-15  // we only support 0-15 event.
> 
> Can the remote side read that the other side supports RFC 2833?
> 
> Best Regards,
> Jade
> 
> 
> 
> _______________________________________________
> Sip-implementors mailing list
> Sip-implementors@cs.columbia.edu
> http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
> 

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