The Cisco ONS 15454 MSTP offers a comprehensive selection of optical filters for delivering the correct amount of bandwidth to each service location in a metro or regional network. The filter cards are part of the Cisco ONS 15454 MSTP intelligent DWDM architecture engineered to reduce DWDM complexity and speed the deployment of next-generation networking solutions.The Cisco ONS 15454 optical filter cards are plug-in modules that take advantage of the proven Cisco ONS 15454 carrier-class features to deliver the flexibility to access network bandwidth from a single DWDM channel all the way to 32 channels, supporting the requirements of service provider and enterprise networks.This card is compatible with SDH/ETSI system.