The Cisco 10GBASE DWDM SFP Modules are fiber line cards for a wide variety of Cisco switches, routers, and other equipment. They allow enterprises and service providers to provide scalable and easy-to-deploy 10-Gbps LAN, WAN, and optical transport network (OTN) services in their networks. The Cisco 10GBASE Dense Wavelength-Division Multiplexing SFP Module offer the following features and benefits: - Supports 10-Gigabit data rates from 9.9G to 11.1G (LAN, WAN, and OTU2/OTU2e) to accommodate different applications - Smallest SFP module footprint in the industry - Hot-swappable input/output device plugs into an Ethernet SFP port of a Cisco switch or router to link the port with the network - Support for a “pay-as-you-grow” model for investment protection - Digital optical monitoring capability for enhanced diagnostics and troubleshooting - DWDM fixed module supports 40 non-tunable ITU 100-GHz wavelengths - DWDM tunable module supports 96 tunable ITU 50-GHz wavelengths - Supports the Cisco quality identification (ID) feature, which enables a Cisco switch or router to identify whether or not the module is an SFP module certified and tested by Cisco