| 摘要 |
PURPOSE:To simplify the device constitution and to reduce the cost by combining a communication line supervisory controller and a communication synchronizing device and designating a branching insertion circuit to branch and insert directly terminal information plural transmission lines on a transmission/ reception data bus. CONSTITUTION:A reception data from a transmission line A is given to an equipment 1, subject to code conversion, frame synchronization, clock extraction and frame phase synchronization of transmission/reception data by a transmission line connecting circuit 8 and the result is given to a branching insertion circuit 7. An equipment 2 connected to a transmission line B acts like similarly. The equipments 1 and 2 are synchronized by using the synchronizing signal from a communication network synchronizing device 12 installed per station. The circuit 7 between the equipments 1 and 2 is designated by using a line setting signal from a communication line supervisory control circuit 11 and various information is subject to direct digital branch and insertion between the equipments 1 and 2 on transmission/reception buses 5, 6. |
