BT Broadband Voice uses VoIP (Voice over IP) to make and receive phone calls via your BT Broadband line. It's flexible, cost-effective alternative to ordinary phone lines with 500 inclusive UK minutes. You can have 1 or 2 Broadband Voice lines running off a single BT Broadband line.
Unlike some other VoIP services, you don't have to have your computer switched on to do it.
Interested? Visit BT Business Broadband Voice (VoIP)