kiwibob1:Curiously the problem solved itself shortly after I contacted 2talk. Basically I can confirm that the settings posted are correct!
Unfortunately I was a bit too quick to determine that the problem was solved. A few tests give two way sound but mostly no outbound.
I've found out how to do a trace on the Fritz Box and with wireshark how to replay the RTP stream (very clever stuff). Even when the caller (my mobile) receives no sound the RTP replay has two way. So somehow the outbound is getting lost between the Fritz Box and my mobile.
Be grateful for any thought before I leave 2talk and go back too 2degrees......
I'm having the same problem. I've used 2Talk since forever with a Cisco SPA112 ATA - it almost doesn't matter what combination of settings I use for that, the VOIP service works just fine. I thought I could retire it now that I have Fritz!Box and it appeared to work except that voice from the remote phone doesn't come through. Tried with and without STUN and PROXY.
Using Fritzbox is a nice-to-have as the Cisco ATA works just fine in my case but I'd like to eliminate a device if I can.
I am on Vodafone currently, moving to 2degrees shortly (hence the Fritz).
Any other suggestions? Using sip.2talk.co.nz for registration and the one-number feature.
did you ever find an answer for this ? I'm having the same issue with trying to use Voyager's VOIP service on a Fritzbox.
the only fix I've found from googling around is to shift back to a 192.168.1.x IP address range for the LAN but that wont work for me :(
see the last post here: http://forums.whirlpool.net.au/archive/1958331