This read-only CoriantTypesYesNo value reports whether near-end ALS (Automatic Laser Shutdown) is enabled for this OTU4 (about 111.8 Gbit/s) line-side OTN facility, defaulting to no. When enabled, a detected near-end fault will automatically shut off the local laser, a safety feature that prevents technicians from being exposed to live laser output while investigating a broken fiber. For example, with near-end ALS enabled, the transmit laser feeding the OTU4 facility on slot 3 would automatically switch off if a fault is detected locally, rather than continuing to emit into a disconnected or damaged fiber.