Hello,I have the following setup:<BR><BR>UA<->NAT<-->SER/MediaProxy<->Prepaid(B2BUA)<-->PSTNGW<BR> |<BR> IVR<BR><BR>Nat'd user calls a number that is forwarded (t_relay)<BR>to Prepaid and the user is prompted for<BR>PIN#/Destination Phone# and all works fine. Mediaproxy<BR>is invoked and a mediaproxy port# (35774) is assigned<BR>during the whole process. <BR><BR>Once the user enters the destination number, the<BR>Prepaid forwards the call to the PSTNGW and the PSTN<BR>phone rings (Call signalling working fine). When the<BR>PSTN phone is answered, no media can be
heard!!!<BR><BR>I did some investigation and here is what is<BR>happening:<BR><BR>Once the user enters the destination# to dial, The<BR>Prepaid/B2BUA does two things:<BR><BR>1) Sends a re-invite to put the UA on hold. <BR>2) Sends an INVITE to the PSTN GW and retrieves the<BR>SDP from the response from PSTN GW<BR>3) Sends a second-reinvite to the UA via SER with the<BR>SDP info of the PSTNGW<BR>4) SER invokes the mediaproxy (since it is reinvite)<BR>and assigns the SAME MEDIAPROXY PORT# as earlier on<BR>when the media was flowing fine (SDP has audio port#<BR>35774) <BR>5) SER forwards the re-INVITE TO UA<BR>6) UA responds with a 200 OK and sends 200 OK to SER.<BR>SER agains invokes mediaproxy and assigns the SAME<BR>MEDIAPROXY PORT# (audio port 35774) and forwards the<BR>response to Prepaid (which sends it to PSTNGW).<BR><BR>I checked on Cisco PSTNGW that it is creating a<BR>session with the mediaproxy (port:35774). BUT NO AUDIO<BR>CAN BE HEARD IN ANY DIRECTION.
<BR><BR>Can anyone please help? Is this a mediaproxy issue<BR>that when reinvites are sent and mediaproxy is invoked<BR>multiple times, issues arise?<BR><BR>I am running the latest mediaproxy<BR>version.<BR><BR><BR>Thanks<BR>Dave<BR><p>
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