I have a client running their business telephony using Asterisk on a
Gentoo Linux server, and they need to change providers because their old
provider is going out of business. I have tried to set up a new SIP
trunk service on their server and also on a test Asterisk installation I
set up on my own Debian system, but I can't get calls to work either
inbound or outbound. Anyone out there know how to configure Asterisk?