ATA (VOIP) device connected - FRUSTRATION

[lifeisfun]

Hi folks,
I just got new WL-500W and I'm ready to step on it
I have Sipura SPA3000 working 100% behind netgear DG834
but if I connect it to the Asus router either it will not register at all
or incoming voice is perfect but outgoing is terribly choppy.

I forwarded same ports on the Asus as I had it on the Netgear ( 5060 )

Can you PLEASE save my sanity and help newbie ?

Using firmware 2.0.0.1

Thanks

[al37919]

spa3102 works fine through wl500gP (Oleg's fw, however, I don't think that that's the issue) without any port-forwarding.

I would guess, it could be helpful to give to SPA an address of STUN server.

[lifeisfun]

Thanks for reply !
I use STUN server as well.
Even if I put my Sipura to DMZ it doesn't work
( My provider is FWD - Free World Dialup )