On Mon, 03 Oct 2005 12:48:29 +0100, Sean wrote:
>
> Sadly it is not likely it will ever work. I've used BT VoIP boxes, with
> PSTN connectivity, and they work with a relay. They are on VoIP all the
> time, unless there is a power cut, or the user presses a key which has
> been assigned. When a incoming call comes through on a BT line the CLI
> is sent before the ring voltage, the relay does not switch over until
> the ring is sent. So if your using a cable line (with american CLI) it
> will work, because the phone rings, the relay clicks over, the CLI goes
> thru, the phone rings again.

That makes sense. Surely it would make more sense to have the relay set to
the PSTN line until a VoIP call comes in - that way the BT pre-ring CLI
would get through... I guess the problem is that that would make it more
complicated when the phone goes off hook to make a call - the router would
have to quickly disconnect from the PSTN to stop the call going that way.

> I don't know if what i am blabbering on
> about will help anyone, but BT CLI is not good with VoIP to PSTN
> connectivity. Best to use an additional telephone :)

Heh, true but the idea was to route it all by a nice DECT phone rather than
have two handsets! ...and anyway it says here on the router box:
"Telephony Features: Caller ID" ! ;)

LJ