| 摘要 |
PURPOSE:To make it possible to call a mobile subscriber without previously discriminating an in-use traveling body by an exchange, by exercising calling control over subscribers, possessing traveling-body-mounted telephone sets, sequentially from a representative telephone set. CONSTITUTION:In response to a car telephone call from general subscriber SUB, automatic telephone exchange 2 calls group car telephone 61 first by attaining access to subscribers' memory 8a of home memory station 5. Exchange 2, when incoming answer signal 13 is not obtained within a certain time after call signal 12 is sent out, calls the next car telephone 62 registered in memory 8a. When signal 13 can not be obtained even by calling all of possessed car telephones 61-64, a message from subscriber SUB is written in memory 8a. Signal 14, once sent out by one of possessors of telephone sets 61-64, is transferred to exchange 2 and the message stored in memory 8a is read out and sent out to the car telephone that has sent signal 14 out. |
