Does anybody use Gamma UK SIP trunks?
Have been trying for the last two days to configure a Gamma SIP trunk and I’m having no luck.
They do not use user registration, but authenticate by IP address.
I’m only really interested in incoming calls. At the moment my sip.conf for incoming is:
host=gamma ip address
I’ve set my externip, localnet and nat(asterisk is behind firewall).
I’m forwarding everything from gamma (udp & tcp - all ports - 0 - 65535) but no joy.
I can see the gamma traffic hitting the firewall which is forwarding to asterisk, but in asterisk I see nothing. Not even failure/s. It’s as if the traffic is not getting to asterisk. I know traffic is forwarded from the firewall because I’ve setup a SIP phone at home that connects to asterisk no problem.
When I’ve tried to dial out via gamma I see no traffic from asterisk to gamma via the firewall. It’s as if asterisk doesn’t know how to get to the internet.
Any help/pointers would be very much appreciated.