Sorry my thoughts weren't correct. When disabling rtpproxy in the local
kamailio installation, I have one way audio. The caller, local SIP user,
can hear audio from the user registered on the PSTN address, which also
can't hang up the call.
It seems to me that the kamailio PSTN gateway can't engage rtpproxy
correctly when receving a call from the local kamailio+rtpproxy.
I changed the configuration from a the basic one to this here
http://kb.asipto.com/kamailio:skype-like-service-in-less-than-one-hour
(I have only updated the outdated functions) and it works well for calls
between mobile phones) but again the same problem described above.
If anyone could give me an advice it would be much appreciated
Thanks