The WDM Channel Modules (WCMs) for low-speed and high-speed transparent services enable users to increase bandwidth up to 10x without installing a new module. Line-rate specific cards for OC-12, Gigabit Ethernet, Fiber Channel, and OC-48 provide clock recovery to ensure full bandwidth operation and superior jitter interference.Each WCM contains MiniSC connectors that accept both single-mode and multi-mode fiber patch cables for interconnecting customer premise equipment (CPE). For laser safety requirements, all WCMs are equipped with an automatic shutdown (ALS) which reduces the optical output power of the remote transmitters automatically in case of a broken remote link.