ASTERISK - [Asterisk-Users] [Asterisk-Dev] Digium to Sponsor a Pizza party at

[phpmechanic]

Hi,

I've got two Yuxin phones that I want to use to make calls between two 
branch offices - ip to ip calling.

I've given both phones (behind a firewall) static IPs. I've set up port 
forwarding on the firewall for udp on ports 5060-5061 to connect both 
phones.

I'm using the sip protocol and have set up the register,  signal and 
control port on both to 5060 and the rcp port to 5601.

The problem is that each phone can ring each other and a connection is 
made when the other party picks up but there is no sound. It all worked 
fine when they were on the same IP segment.

I'm not sure if I I have some ports wrong or if for IP to IP calling on 
these phones I should try h323 instead..

Does anyone have any suggestions as to what I should try to get this 
working ?