Cisco offers a variety of connectivity, expansion and upgrade modules and cards to accommodate the customer specific needs. Cisco's components are easily and inexpensively upgradeable as customer requirements change.This module supports three-port multimode and one-port single-mode fiber intermediate reach plus. Supporting three multimode and a single-mode intermediate reach plus with a span of 30 km, it is a very effective interface for connecting devices such as routers and LAN switches locally, and connecting to another ATM switch in the backbone.