[asterisk-users] Unable to create channel of type 'IAX2' (cause 20 - Unknown)

[Alejandro Imass]

On Sat, Apr 14, 2012 at 7:55 PM, Joseph <syscon780 at gmail.com> wrote:
> I forgot to add:
>
> clinic-amd*CLI> iax2 show peers
> Name/Username    Host                 Mask             Port          Status
>    home_server      (null)          (D)  255.255.255.255  0
> Unmonitored
> iaxy-322/iaxy-3  (null)          (D)  255.255.255.255  0
> Unmonitored

The two Asterisk boxes have to register to each other so home server
and clinic have to be on the peers list on both sides (or at min on
one side) and you must see the IP. Make sure you are resolving the
names correctly and that Asterisk is set-up to resolv DNS names or use
the IP instead.