SlashGear

Xlink allows users to transfer calls from their mobile phone to any phone in the house. This service works with any Bluetooth capable phone. Pair up to any three devices that will also shoot over any caller information straight to the home phone.

Say you’re at home and your phone rings but you would like to speak on your home phone rather than being stuck to a wall charger with a dead phone. Now you can just transfer any call to your home phone and pick it up from there. This replaces the need for several other services provided by your mobile provider.

Frankly, for $79.99 it seems a bargain.  XLink also sell the BTTN gateway, which can connect to up to three cellphones plus a landline (or VoIP line), for $109.99.