| abstract |
(57) [Abstract] [Problem] In an emergency telephone facility of a building having a plurality of centers, each of which is provided with a master unit of the emergency telephone facility, It is intended for emergency telephone equipment that can be operated at each center and can be centrally controlled at the central center. SOLUTION: One of a plurality of parent machines, each of which has an interlocking function of a controlled device, is set as a main parent machine, and a main parent machine is provided with an interlocking control means for controlling the interlocking function of a sub-parent machine. Also, The main master unit has a setting function for setting the sub master unit to the unattended mode, and the line that arrives at the sub master unit set to the unattended mode is transferred from the sub master unit or the exchange to the main master unit. |