Hi I am having trouble getting multiple SIP phones to work correctly
through a BT Business Hub Router
connecting to an asterisk server over the T'internet.

I am experiencing one way audio and dropped calls - signs which point
to a firewall issue.

I know the firewall at the asterisk end is fine 'cos it's a proper
Cisco Pix which I've configured
to allow SIP AIX and RTP to and from the external address of the BT
Hub.

Unfortunately I cannot seem to open the ports on the BT router for
more than one internal IP address
as this router's web interface does not seem to give a direct method
for opening ports.

What you have to do is create an 'application' which has ports
assigned to it, and then you can
assign this application to an IP address on the internal network.
Unfortunateley when I try to assign
this application to more than one phone the GUI gives me an error
saying I cannot apply this
to more than one IP.

Has anyone managed to get this working?

Any help gratefully received.


Alister.