The FRM220-OADM Optical Add/Drop Multiplexer are modular designed cards that support ITU-T G.694.2 wavelengths between1271nm to 1611nm in 20nm increments. The FRM220-OADM Optical Add/Drop Multiplexer takes a single wavelength from a trunk,pulls the signal out, and allows a new signal at the same wavelength to be inserted into the trunk at roughly the same spot. All theother wavelengths pass through the Add/Drop Multiplexer with only a small loss of power (usually < 2.5dB including connectors andadapters). FRM220-OADM modules are passive devices that require no external power. They can also be installed in an FRM220powered chassis with a NMC management module and can be managed using SmartView EMS network management software,Telnet or a serial console port. The FRM220-OADM modules can be installed in any FRM220 chassis equipped with other FRM220media converters and transponders to provide a multiservice platform capable of delivering Ethernet, TDM, Voice and other servicesacross a CWDM fiber common link.