| 摘要 |
PURPOSE:To attain 2-way talking by using the pager of a small size and light weight. CONSTITUTION:A pager PG sends intermittently identification information. A detector D receives the information and sends it to a CPU and it is registered corresponding to an area. When a call comes from a telephone set TEL, the pager PG is called and the pager PG is inserted and connected to a portable telephone set PS. The identification information of the pager PG is sent from the portable telephone set PS to the CPU, in which the information is collated with information relating to the registration and when they are coincident with each other, a channel is formed between the telephone set TEL making a call and the portable telephone set PS. |
