[asterisk-users] Phones lose contact

[Jerry Jones]

On Oct 17, 2008, at 5:14 PM, Paul Douglas Franklin wrote:

> When off site, our IP phones lose contact after a few minutes of
> inactivity.  They no longer receive calls, though they can call out.
> Asterisk acts as if it is ringing the phone, but the phone does not  
> ring.
> The phones are behind a NAT/firewall.
> What is the most reasonable solution?

qualify=yes