----- Original Message -----
From: "Paul Warner" <paul.warner@bigfoot.com>

> The company that I work for wants to do a proof of concept VOIP via
> ADSL. Yeah I know ADSL in NZ is not the best for VOIP but it can be
done.
>
> (snip)
>
> We asked our parent in Oz and they say that they have one site doing
> this over there using a VPN over ADSL set up .

I suspect the VPN is a red herring, at least for a proof of concept.
The VPN will allow data through the firewall/router, but if you don't have a
VPN already, you would have to modify the routers/firewalls to allow VPN
through, so why not modify them to allow VOIP through?

I tried sipserve.co.nz (currently free for PC to PC calls, costs per minute
for PC to real phone numbers), and it worked OK.
I had to pinhole some ports in my router.
(You'll have to google to find out how to pinhole/forward ports for your
routers/firewalls.)

The PC based iPhone that sipserve suggest (XTen X-Lite), didn't work without
some ports pinholed/forwarded, and it was difficult to find out which ports
to forward.
(XTen try and use STUN and xTunnel and other mumbo jumbo in an attempt to
avoid having to pinhole ports, but it didn't work.)

Pinhole port 5060, protocol UDP and ports 8000 thru 800x protocol UDP
through to the test PCs.
(These ports listed in the X-Lite setup menu under System
Settings>Network>Listen SIP and Listen RTP ports.)

You only *need* one 800x port, but more would allow conferencing and such...

Mark

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