| 摘要 |
PURPOSE:To expand communication attainable range without being mis- connected with other radiotelephony system by providing a repeater relaying radio communication between a master set and a slave set, and using an identification code between the master set and the slave set, between the master set and the repeater and between the slave set and the repeater to attain relay operation. CONSTITUTION:The system consists of a master set connecting to a telephone line, a slave set 2 connecting to the master set 1 via a radio line, and a repeater 3 repeating the radio communication between the master set 1 and the slave set 2. For example, in the case of a call from the slave set 2, the slave set 2 sends an identification code used between the master set 1 and the slave set 2 and between the slave set 2 and the repeater 3 to the repeater 3 and the repeater 3 opens a speech line with the slave set 2 accordingly. Then the repeater 3 sends an identification code used between the master set 1 and the slave set 2 and between the master set 1 and the repeater 3 to the master set 1 to open a speech line with the master set 1. Thus, while being in compliance with laws, the talking distance is expanded. |
