[asterisk-users] Extensions busy/congested and "circuit-busy"

[Eric "ManxPower" Wieling]

That error message is almost always because the two sides cannot agree 
on a codec.  HOWEVER, if you are using SIPura and G726, there is a 
Makefile option for Asterisk to make it work.

Guy M Guyadeen wrote:
> Our pbx is a Fedora Core 4 box running Asterisk 1.2.6. It has a public 
> IP and is publicly accessible (no NAT, firewall, etc.).
> Our Sipura 841 phones are in several locations, all NAT'ed behind PIX 
> firewalls.
> The system used to work flawlessly, but now any extension we dial comes 
> back as "busy". On the Asterisk CLI, I always see something like:
> 
> Got SIP response 488 "Not Acceptable Here" back from {our IP address}
>     -- SIP/{extension}-d544 is circuit-busy
>   == Everyone is busy/congested at this time (1:0/1/0)
> 
> 
> Would extensions.conf or CLI debug output be helpful?
> 
> Thank you in advance!
> Guy
> 
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