[asterisk-users] Remote Connection to Asterisk

[Gary]

Hello all - 

This is basically an updated re-posting of one I've posted a few days ago.
Thanks to the kind help provided but I still can't make it work.  But I'm
moving a little further down the line (thanks to you folks).

Basically, I've got an Asterisk server in a LAB ENVIRONMENT on my home LAN.

The server has a Wildcard TDM400 installed but has no POTs lines/phones
connected.

The LAN is "talking" to the Internet via a Linksys WRTG-54 router connected
to my cable-modem. - On the home LAN, I've also got a few Cisco phones
(7940's/7960's & one 7905) that work fine talking back and forth with each
other via Asterisk.

Actually, one of the 7960's is connected to my Broadvoice account so I KNOW
sip works over my local LAN connection.

My home (real world) IP address is static.

On the router, I've turned on "DMZ" to point it to my Asterisk box's static
IP address.  I know this is probably overkill, but at this point I'm trying
anything.

I've also set up port forwarding on the router for port '5060' and all the
'RTP' ports asterisk needs to point to the Asterisk box.

I've also set in Asterisk's conf file for 'nat=yes' for all extensions
registering with the server.

The Problem:  Basically - Remote users can register & make calls.  The phone
on the other end rings, but there is no voice traffic. - Just silence.

Remote users have been Cisco 79xx phones, xLite softphones (I think that
name's correct), and Zoiper (we've tried both IAX and SIP on Zoiper).

Any Ideas? - If anybody wants work with me over the phone, I'll be happy to
call them.  E-mail me: gguthary-at-jtech.net - With my Broadvoice phone, I
can call anywhere in 35 countries.  I'll set you up with an extension and
you can test.

Much (VERY MUCH) thanks in advance.  This is very frustrating to say the
least.

Gary G.