| 摘要 |
PROBLEM TO BE SOLVED: To avoid the occurrence of a temporary originatingreceiving call disabled state in a radio slave by preventing the collision between control carriers from each base station housed in each telephone system connected to an analog network. SOLUTION: Synchronous units 11A and 11B are provided in each telephone system and a synchronizing clock generating section (composed of an oscillation circuit and a frequency dividing circuit) which generates a synchronizing clock for synchronizing communication between each unit 11A and 11B and a radio slave and a change-over switch 14 which sets the units 11A and 11B as master synchronous units or slave synchronous units are installed to each unit 11a and 11B. When each unit 11A and 11B is set as a master synchronous unit, the synchronizing clock from its own telephone system to a base station and the slave side connected to its own unit and, when the unit is set as a slave synchronous unit, the unit supplies the synchronizing clock from the master side to the base station connected to its own unit. |
