[Asterisk-Users] Snom 190's vs Softphone

[dabigshiznizzle]

    I have been playing with asterisk for a couple of weeks now and I 
have been very happy with its performance.  However, I have run into a 
problem with how I want to deploy this solution.

I have a mix of softphones (SJ and Xlite), ATA's, and a couple of IP 
phones (Snom 190).  The asterisk box is on the public network.  For my 
primary users they will reside behind a watchguard 4500 firewall.  For 
the others there will be a mix of Ethernet routers 
(Linksys/Netgear/DLink).  I have been testing the different deployments 
and have found that the softphones and ATA's work like a champ in 
getting around the firewall  and the NAT of the work at home users.  
However the Snom phones don't perform as well.

I have played with qualify statement in sip.conf and at first I thought 
that I might have been OK with not using that argument, but it didn't 
work.  I continue to get the following:

*CLI> Feb 13 15:50:59 NOTICE[14043]: chan_sip.c:7971 sip_poke_noanswer: 
Peer '9093' is now UNREACHABLE!

When this happens, I can't receive any calls (of course) but I can place 
outbound calls.  Is this normal?

Can anyone help me with this?