The NM-1FE2W, NM-2FE2W, NM-2W, NM-1FE1R2W, NM-1FE2W-V2 and NM-2FE2W-V2 WAN Interface Card carrier modules allow customers using Cisco 2600, 3600, 3700 and 3800 Series Routers to benefit from the increased performance and density capabilities delivered by this family of network modules. Features include auto-sensing 10/100 Mbps Fast Ethernet ports and TDM capabilities.