Twin Talk works your home phone line harder and reduces the need for a second line. Using TwinTalk enables a business extension on your home phone line, or a connection for your fax with its own telephone number. With TwinTalk, your children, flatmates or lodgers get their own extension in their rooms with their own phone number; you needn't be their receptionist any more. BT's CallSign service lets you have two numbers on your telephone line and with TwinTalk, you can decide which of your phones or faxes will ring when each number is called. TwinTalk GuardCall keeps calls private and fax data secure. more