My setup is as follows:
Asterisk installed at site1.com behind a NAT with port 5060 forwarded to it
SPA921 at site2.com
I have tried SPA921 with an external IP (connected directly to the internet), as well as behind the firewall (NAT), and have had the same results regardless. The phone can register the account, connect calls, but is unable to send or receive audio. The only case where audio will come through is when I try to check the mailbox - but even then, I can’t actually check the mail, because the keypresses for the password are not being sent to the Asterisk server. I’ve attempted to tell the phone to use STUN, as well as to tell it that it is behind a NAT or otherwise, and this is the best I have been able to do. Does anyone have any ideas or clues that might help me sort this out?
Thanks in advance for any help,