Jono <nothanks@blueyonder.invalid> wrote:[color=blue]
> I take it you're not a FeePBX user...[/color]

No, just plain old Asterisk for me :)
[color=blue]
> I can enter the CLI for the trunk; any calls going out on that trunk
> will default to show that CLI.[/color]

Ah, right. In plain Asterisk-speak that sounds equivalent to this in
sip.conf:

[someprovider]
callerid=00441234567...
host=sip.someprovider.net
....
[color=blue]
> I can also enter the Outbound CLI for an extension. This has the effect
> of over-riding the default CLI set in the trunk.[/color]

While that's something like this in extensions.conf:
[someextensioncontext]
exten => 1236,1,Answer
exten => 1236,2,Play(tt-weasels)
exten => 1236,3,Set(${CALLERID(num)}=0044.....)
(and various other ways of saying the same thing)

But neither work for me :(

Theo