| 摘要 |
PURPOSE:To provide a key telephone system in which the state of a master set is recognized by a mobile set being a cordless telephone set accommodated as an extension exclusive telephone set. CONSTITUTION:A display section used to display the state of a master set 101 is provided on mobile sets 110a-110d of a radio telephone set connecting to the extension of the key telephone system, and a state display signal is sent to the display section of the mobile sets 110a-110d [from a state storage section 106 provided on the master set 101 of the key telephone system[ or [from a state storage section provided on stationary sets 109a, 109b of the radio telephone set.] Moreover, the time when the state display signal occupies the radio communication channel is reduced by selecting the time when the state display signal is sent. |
