[Asterisk-Users] OT: Multiple SIP phones behind NAT gateway?

[Matthew Farley]

     Though it does not provide a solution to your challenge with the
hardware you mention, I have had very good luck with Cisco ATA-186
devices (one or many) behind NAT (nothing special... any basic NAT
router seems to be fine) connecting via SIP to an asterisk server with a
public IP. My understanding is that some of the IP phones from Cisco can
do this just as well, if you want to avoid having ordainary phones on
the desks.

     I overcome the ordainary-phone problem by putting Nortel Vista 350s
on the ATA-186s... They don't deliver the features of the true
IP-Phones, but my users seem to expect that an IP-connected telephone
look like something out-of-the-ordainary. :)

Just my $0.02...

-Matthew Farley

On Wed, 2003-04-23 at 11:02, WipeOut . wrote:
> Hi,
> 
> I know this is slightly off topic but I figured the knowlege here is probably the best on the subject..
> 
> I want to setup remote offices with 4 to 6 SIP phones (SNOM 200) using ADSL and the internet to connect to the Asterisk box..
> 
> These phone will be behind an ADSL router using NAT...
> 
> I don't want to setup another Asterisk system in each office so IAX is not an option..
> 
> I could use static port mapping on the NAT gateway but I am not sure how to do this for 6 phones.. I guess I would have to allocate a seperate port to each.. Also this could have major security implications..
> 
> I could use a STUN server but I have not found a free one yet..
> 
> I could use an ADSL router with a built in SIP proxy/registrar but the only one I have found is the Intertex IX66 and they seem quite expensive..
> 
> Anyone got any ideas or thoughts?? or even better experiences..
-- 
Matthew Farley <asterisk at wheatstate.net>