PURPOSE: To reduce setting work and to guard domestic privacy by connecting main equipment, which connects a trunk line telephone set through a telephone line, to an extension telephone set on a wireless basis.
CONSTITUTION: Main equipment 5 is equipped with a function to place an outgoing call, an incomming call and a call at the section of the trunk line telephone set, and a function to place the outgoing call, incoming call and call between plural telephone sets 61, 62, ... on the wireless basis. The telephone sets 61, 62,... are equipped with the function to place the outgoing call, incoming call and call between any of the other telephone sets 61, 62... through the main equipment 5, or at the section of the trunk line telephone set on the wireless basis, and the main equipment 5 is connected to the plural telephone sets 61, 62,... on the wireless basis. Thus, the minimum wiring work is sufficient, and the telephone set system which can guard the privacy can be obtained.
SASAKI MASAO
FUKUI YOSHIHISA
KOMORI DAISUKE
TAKATO MORIKAZU
