| abstract |
If a repeater supervisory control (SV), anpre-emphasis automatic adjustment (PE), a receivingnside threshold value automatic adjustment (Vth), antransmitting side dispersion compensation valuensetting (VDC(T)), and a receiving side dispersionncompensation value setting (VDC(R)) are executed fornan optical main signal, these controls are executed innthe above described priority order. Accordingly, if thencontrols are independently executed, or if two or morencontrols simultaneously occur, a control with a highernpriority is executed. In this way, a transmissionnquality of an optical signal is prevented from beingnbadly influenced as a result that the controls arensimultaneously executed. |