PURPOSE: To provide a cordless telephone device system capable of preventing the competition of the confirmation of a control channel and the interference of a control signal.
CONSTITUTION: A group using only one control channel (46ch) of two control channels, and the group using only the other control channel (89ch) are provided by using the least significant digit of the ID number of a master device, and a set constituted of two master devices by selecting each one from both the groups, that is, the first set (ID0, 1), second set (ID2, 3), third set (ID4, 5), fourth set (ID6, 7) and fifth set (ID8, 9) are prepared. Thus, the transmitting timing of the control signal of each set is made different from each other just like (a) to (e) so that the transmitting time zone of the control signal from the master devices of each set can be prevented from being overlapped on the transmitting time zone of the control signal from the master devices of the other set.
SASAKI YOSHIHIRO
KONDO KOJI
HAYASHI SHINICHI
TOKYO SANYO ELECTRIC CO
OKI ELECTRIC IND CO LTD
| JPH02109433A | 1990-04-23 |