The Cisco® 40GBASE CFP transceiver modules are hot-swappable input/output devices that plug into a 40 Gigabit Ethernet CFP port of a Cisco switch or router. They offer customers versatile 40 Gigabit Ethernet connectivity options in core and distribution layers of data center, enterprise, and service provider networks. Features and Benefits Main features of Cisco 40GBASE CFP modules include: - Support for 40GBASE Ethernet and OTU3 standards - Interoperability with respective industry IEEE- and/or OTU3-compliant interfaces - Variety of interface choices for 40 Gigabit Ethernet and 10 Gigabit Ethernet connectivity - Support for "pay-as-you-populate" model - Support for digital optical monitoring (DOM) - Support for the Cisco quality identification (ID) feature, which enables a Cisco switch or router to identify whether the module is certified and tested by Cisco