Invalid Media Description

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  Hello,

   

  I'm getting this error in the event log from MSS:

   

  Application Error 50000: An exception occurred in the Speech workflow with Id cec8ce2e-07c1-4a25-ab07-cfbae8f9b468. The exception was: An invalid media description was received from the remote end.
  

   

  Here's the SDP from the INVITE coming from MSS:

   

        v=0
          o=- 0 0 IN IP4 10.0.0.29
          s=Microsoft Speech Server session
          c=IN IP4 10.0.0.29
          t=0 0
          m=audio 38400 RTP/AVP 114 115 4 0 8 101
          a=rtpmap:114 x-msrta/16000
          a=fmtp:114 bitrate=12000
          a=rtpmap:115 x-msrta/8000
          a=fmtp:115 bitrate=12000
          a=rtpmap:101 telephone-event/8000
          a=fmtp:101 0-16
          a=ptime:20

   

  And here's the SDP in the OK from my gateway:

   

        v=0
          o=8888888 8000 8000 IN IP4 10.0.0.40
          s=SIP Call
          c=IN IP4 10.0.0.40
          t=0 0
          m=audio 5004 RTP/AVP 4
          a=sendrecv
          a=rtpmap:4 G723/8000
          a=ptime:20

   

  4 is Media Format: ITU-T G.723, and it is listed as one of the formats in the initial INVITE. 

   

  Why doesn't this work?

   

  Thanks!

   

  EZB

  Wednesday, April 25, 2007 1:51 PM