Cisco 1-Port OC-3/STM-1 Optical Service Module Card

This card provides an internode communications channel for management and user data, allowing network-level communications to support intelligent DWDM implementation without the use of client transponder data-communication overhead. It integrates an optical add/drop filter to remove and add the OSC wavelength while passing the other wavelengths. The OSC-CSM is used in nodes without a booster amplifier or future cross-connect equipped systems.