It happens that alexd formulated :[color=blue]
> On Mon, 14 Jan 2008 00:51:21 +0000, Iain wrote:
>[color=green]
>> Graham. wrote:
>>[color=darkred]
>>>> Well, if you set things up properly, you ought to be able to configure
>>>> it remotely.
>>>
>>> Its just a BT landline, what do you suggest?[/color]
>>
>> Ah, I see. Thought the ATA was at the remote end. Can you set up call
>> diversion on the line? Possibly not remotely, knowing BT.[/color]
>
> You can probably ring BT and ask them to do it for you. Paying for the
> diversion beats a 200 mile round trip in my book![/color]

.....BT have a service called "Smart Divert"

This allows a user to dial a control number and set up / turn on/off
diverts remotely. AFAIK, it is only available on business lines. Good
little service, though.

Alternatively, an "Administration Provided Call Divert" can be
requested. This should be available on Residential lines, however, has
the disadvantage of it being necessary to contact the SP to make any
changes. that said, you can have divert on busy/no answer or all calls
set up.