ccrtp with another softphone

Hello

I'm newbie to ccrtp library and I would use ccrtp to create some RTP
applications!
Can I use ccrtp to send packets to another softphone which does not use
ccrtp ?

I've my application with a transmitter (using putData method) and receiver
(using getData method): they work perfectly, but if I try to send pkts to
another softphone I cannot hear anything ...

Could anybody help me ?

Thanks in advance,

Carmelo 
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