The Metro 1500 offers a variety of WDM Channel Modules (WCMs) that support line-rate connectivity for different protocols at speeds ranging from 10 Mbps to 2.5 Gbps. The WCMs for low-speed and high-speed transparent services enable users to increase bandwidth many times over without installing new equipment. 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.