| 摘要 |
<p>PURPOSE: To secure order wire communication even in the state of plural transmission line faults disabling the passage of main signal between both terminal stations and to reduce the load of work for recovering the main signals by using this OW communication concerning a control system for OW communication for a system interposing a repeater station between both the terminal stations. CONSTITUTION: Concerning the control of OW communication equipment 1, a repeater station LR1 is provided with a quality monitor/selector part (Mw and S) and an adder Ad and a terminal station NODE1 is provided with a quality monitor/selector part (Mw and S) so that OW signals from the WORK side and the STBY side can be selected and used independently for each control block unit with a transmission line block between the terminal station NODE1, etc., and the repeater station LR1, etc., and a transmission line block between the repeater stations as control units. Thus, even when the WORK side transmission line of a certian block and the STBY side transmission line of the other block simultaneously turn faults, the OW communication can be recovered.</p> |
