Hello,
I've been fighting one-way-audio issues with asterisk and SIP
extensions for some time..., and I want to share with you my findings
;)
My setup:
* 1 ADSL router (Zyxel)
* 1 Asterisk box with private IP, and interesting ports forwarded to it.
* Several extensions, some local some remote
The problem:
* External extensions behind double nat don't get audio when they
initiate a call. But if the extension receives the call, there is no
problem.
The fix:
* Get a Linksys WRT54G, and setup the adsl router in bridge mode,
giving the public IP address to the WRT.
* Setup port forwarding and QoS (optional)
* Enjoy VoIP ;)
I don't know the exact reasons why this happens, but it works ;).
Julian.
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