Figure 3: High-speed automatic configuration tests using DSP

(verifying automatic configuration in 50 ms or less)

An optical switch is used to switch the optical signal between routes of different length (and amount of waveform distortion) (from Route 1 to Route 2). The received optical signal is interrupted from the beginning to completion of the switch, the interruption is detected by the optical receiver, and an alarm is raised. This confirms that after completing the switch to transmission Route 2, from the moment the input of the optical signal is restored, waveform distortion is measured and cancelled and continuity is restored within 12 ms, and 100 Gbps optical communication can be configured quickly, within 50 ms.