The Quad OC-48c/STM-16c POS line card provides Cisco 12416, Cisco 12410, Cisco 12406, and Cisco 12404 Internet Routers with a single 10Gbps POS interface on a single card. The line card is available in the following versions: Short-reach (SR), single-mode and Long-reach (IR), single-mode.This Cisco Packet-Over-SONET Short-reach Line Card has a typical maximum distance of 2km.