| 摘要 |
PURPOSE:To utilize a radio telephone channel for a speech line as much as possible by integrating plural control channels connected through a cable telephone line and performing conversion and connection through one control channel of the radio telephone channel. CONSTITUTION:Cable telephone lines 1a-1c are divided into a speech channel 4B and a control channel D by connecting circuits 2a-2c and at the connecting circuit 2a, 3B in the speech channel is directly connected through a connecting path 3a for the cable telephone line and the radio telephone line to a transmitter/receiver 4a for the radio telephone channel but at the connecting circuits 2b and 2c, the speech channel 4B is directly connected through connecting parts 3b and 3c for the cable telephone line and radio telephone channel to transmitters/receivers 4b and 4c for the radio telephone channel. The control channel D from the connecting circuits 2a, 2b and 2c is connected through 11aa, 11ba and 11ca to control circuits 6a-6c. |
