You can connect one or two Surface or Flush Mount door stations direct to the Door Phone Line Sharer.

When the call button of either door phone is activated, the DS Line Sharer will ring all telephones connected to your telephone line, with a different ring, to advise you that you have a visitor at your front door or gate.  Simply answer any telephone (including your cordless phone) and you are then connected to the door phone, so that you can speak to your visitor and even let them in.

The DS system has the advantage over other direct phone line systems in that activating the system does not attract telephone line call rates.