I have a tunnel up and running and a registered 7960 on the remote end.
Tunnel setup is on a 7120 o my end PIX 525 on the remote end. My core is a 6509 doing our L3 switching
and I have routes out.
Both phones have a 10.x.x.x address moving across the tunnel I have no audio but I can call both phones and they are registered.
I also have them in a g729 region.