Hi all,

I have developed a softphone using SipXTapiDotNet library.
I regsitered my softphone with interop.pingtel.com server.
Then I call their (server's) IVR service number 100.
On receiving 200 OK reponse of INVITE, my softphone sends first RTP packet 
which indicates "Unknown RTP version 0". After that my softphone start sending 
RTP packets with payload all F's.

Can anybody tell me why is it so?
Please help me as it is very urgent.

Thanx in advance.

regards,
Manoj Kumar



      
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