With most wholesale SIP providers don't register each DID like it was a separate phone line, you have one account that you add all the DIDs to then you route each DID to whichever SIP server you want it to go to. For outbound call you don't have to register with the carriers server, your IP is allowed in their system and you just point your outbound calls at that carrier channel. What I cant work out with 3CX is how to setup a provider channel without having to add an external phone number and user info and make it register like it was a single terminal. I have made it work by using bogus authentication info but the problem is the outbound CLID always show the number of the channel instead of the CLID of the originating extention. Has anyone setup 3CX with wholesale SIP providers like VTWhite or iCall?