In reply to a post by aks:

Well that means I am stuck for now then, but I will ask Sky how I can use alternative equipment (Ibut 'm expecting to get a useless response from Sky).

If your phone number is important to you, why not port the number to a voip provider such as Voipfone or Sipgate?

Sky may be awkward about giving out details however I will relate what BT did.

On their 2-wire hubs there were 2 VoIP lines on analogue ports. For most people it was a case of go to a specific website and based on user ID it would configure the port with you chosen VoIP number.

If you wanted to use your own VoIP interface, a call to the tech support desk would give two options. They would tell you how to intercept the parameters of it Or if you were willing to allow remote access they would login and grab the data for you.

Try calling support of not you may need some intercept software. One you have it most hardware will work. I prefer Gigaset

I was very clear in my post as another poster pointed out. Whilst it may be transited over VoIP they may refuse to give the VoIP details or may refuse people using their own router with the service - if that is the case then the only way it can be used under their terms is for an analogue phone. If they only sell if for use with an analogue phone then it is a VoIP carrier not a VoIP service.