Since Callcentric's site boldly says "We're a BRING YOUR OWN DEVICE phone company" my impression is I'd need some device (beyond the existing dumb phone). I don't want that. Instead, I want to tell a service provider "Here's my existing number, here's the number to forward its calls to." Can Callcentric do that? If so, I don't see it on their site. I don't have any of the devices they list, nor do I want to add such devices or install software. A few dollars more for simplicity is worth it to me.
I think that only means you
can use a generic adapter (OBi, etc) that you bring to the party. Some companies have their own proprietary adapters.
You did see you can just use a phone or desktop - so that's could be your 'device'. But I don't think you even need to bother setting that up. To answer your question:
Instead, I want to tell a service provider "Here's my existing number, here's the number to forward its calls to." Can Callcentric do that?
Yes. As I said, just get the account, and on the web page interface, set up the forwarding number. As long as the system doesn't see the device (or the phone or desktop you might have used for a test), it forwards the call.
As I said, we had this set up for MIL. Of course she did have a 'box (Obi 100 IIRC), but if it was off, I got her calls. The caller didn't even know they were forwarded.
Just to cover the 0.01% - since MIL did have a device (the OBi 100), I suppose that
might have been involved in setting up the account,
but I really don't think so. The alternative is use the software they list for just that purpose, then trash it.
It would only cost a few bucks to try it.
edit/add - I see one catch - a "forwarded call" is considered an outgoing call, so you'd need to pay for one of the slightly more expensive plans that include outgoing calls.
-ERD50