This read-only CoriantTypesYesNo value reports whether the client-shutdown function is enabled for this OTU4 (about 111.8 Gbit/s) line-side OTN facility, defaulting to no. When enabled, the NE will shut down the local client-facing transmitter if the line side fails, which stops a one-sided fault from silently carrying corrupted traffic and signals the failure to attached equipment. For example, with client-shutdown enabled on the OTU4 facility on slot 3, a line-side failure feeding it would cause its own transmit laser to shut down too, so the directly attached client device also sees a clear link-down rather than continuing to send traffic into a broken path.