You probably want to avoid rtpproxy with the PSTN gw as it is (should be at least) on a public IP.
Don't touch the messages from the gw (only from the UA). You can use active media if the gw supports that. If not, you have to use rtpproxy when your ua is behind a symmetric NAT.
g-)

jorain wrote:

Hi all,

I have a PSTN gateway (IP:123.456.78.90), when I route to it, there is no audio between PSTN and UA.

I found that the PSTN gateway IP is different from the media IP, which is specified inside the SDP Connection Information (c) : IN IP4 xxx.xxx.xxx.xxx

My RTPProxy is working and tested before.

Please help.

Thanks

Regards,

jorain
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