| 摘要 |
PURPOSE:To devise the system such that plural radio telephone sets belonging to one zone ring for an incoming call simultaneously when a group incoming call signal is received and compares it with information of a radio one number stored in a 2nd storage means and sends a control signal when they are matched. CONSTITUTION:When a radio line controller (RCU) 37 detects an incoming call 10 to one specific trunk line 36C corresponding to a radio zone 38C, an RCU sends a radio zone number (CEG-ID) 11 to radio connection devices CE1 - CE3. The CE 1 sends a group incoming call (CEG-ID) 21 representing the designation of zone to radio telephone sets RT1 - RT3 resident in the radio zone 38C. When the group incoming code of the radio zone stored and belonging at present is matched with the incoming group code, the RT1 - RT3 starts bell ringing simultaneously. Thus, plural radio telephone sets belonging to one zone simultaneously.
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