The Cisco 10 G Base-SR module supports a link length of 26 m on standard Fiber Distributed Data Interface (FDDI)-grade multimode fiber (MMF). Small 10G form factor Supports 10 G Base Ethernet Hot-swappable input/output device Provides flexibility of interface choice Supports "pay-as-you-populate" model Supports digital optical monitoring capability Supports the Cisco quality identification (ID) feature