[asterisk-users] Weird NAT issue ...

[Steve Davies]

If the two phones attempt to refer to each other using their external
(NAT) IP addresses rather that their internal addresses, then it will
all go horribly wrong. You do not provide enough information about
asterisk IP addresses or firewalls for a possible solution, but
assuming you are using SIP and asterisk, you could try
"canreinvite=no" against the 2 phones to see if keeping the Asterisk
server in-the-loop helps.

Also look on the VoIP wiki for "externip" and "localnet" in the
sip.conf configuration.

Regards,
Steve

On Mon, Mar 17, 2008 at 1:59 PM, Alan Williamson <alan at blog-city.com> wrote:
> Afternoon one and all.
>
>  I am having some interesting fun with our Asterisk setup.
>
>  We have two CISCO handsets (7960) sitting on the same network (NAT).
>
>  Each phone can successfully originate calls.
>
>  Each phone can be called successfully from outside
>
>  Each phone can be directly called by other extensions OUTSIDE the network
>
>
>  HOWEVER -- when those 2 phones try to call each other; the connection is
>  made, but no voice is heard.
>
>  Any advice as to where i need to look?
>
>  thanks
>
>  --
>  Alan Williamson
>
>   Try the free registration-less reminder service
>     http://www.yourli.st/
>
>   myBlog = 'http://alan.blog-city.com/';
>
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