BT TWIN TALK CALL LINE ENHANCER - BRAND NEW IN BOX The BT Twin Talk lets you connect two phones with their own numbers (or one phone and one fax) on a single BT line. Twin Talk works in conjunction with the BT Call Sign service, an additional service available from BT. This service gives you an additional number for your phone line, which will have a separate ringing tone when called. There is usually an additional monthly charge for this service. Check with BT for more deatils. There are many ways to use the Twin Talk adapters, for instance: Set up a business extension on your home phone line. Use a separate number to receive faxes or for your home business.
