I've got a one-way audio problem, but I've looked through a few documents on the subject and I'm not sure that it's the same issue.

User A calls a local Asterisk user B via a public SIP gateway (voiptalk.org) using (sip:[EMAIL PROTECTED])

B is connected to the Asterisk server via VPN

B is registered (and has successful bi-directional conversations with other users on the VPN)

Asterisk correctly forwards the call via SIP and B's phone rings and is answered, but B can't hear A

So there appears to be an audio-path blockage from A via Asterisk to B.

Now if A leaves a voicemail message on the asterisk box, that's fine (the sound file contains a recording of A's voice!)

Therefore, it looks like the problem is to do with the forwarding of RTP packets by Asterisk from A (Internet origin) to B (VPN).

Any ideas?
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