PURPOSE: To contrive to reduce data transmission time by providing a switching means setting switching the timing till a slave set sends a reply data from a reference signal in a data from a received master set to the slave set and allowing plural slave sets to give a reply to the master set in the timing set individually.
CONSTITUTION: When a call signal from a telephone line 5 comes to a radio telephone set, it is led to a master set 4, inputted to a control section 46 via a telephone circuit 45, modulated by a transmission section 41 and radiated as a radio wave from a transmission antenna 40. Since IDs of the slave sets 1∼3 is identical, all the slave sets 1∼3 are called, but a signal modulated by a transmission section 29 is radiated as a radio wave from the antenna 28 after a prescribed time elapses from the reference pulse reception included in the call data by the control section 22 in the slave set 2. The slave sets 1∼3 apply the operation of the same content at the transfer of individual pre scribed time to send an acknowledge data to the master set 4 in order. Since the delay time for the reply of each slave set is set by each slave set in this way, one kind of slave sets are enough for the purpose and the time of data transmission/reception is decreased between the master set and the slave sets.
NAKAMURA EIJI
NISHINO YUTAKA
MATSUI HIROYUKI
NIPPON TELEGRAPH & TELEPHONE
| JPS61244136A | 1986-10-30 |