A Cable Backbone used to interconnect Local Area networks at various sites (corporate offices and factories, for example) in a given region, generally a city. Optical Fiber is well-suited to the Transmission of both Data and voice over such a network. In terms of geographic breadth, MANs are larger than LANs, but smaller than WANs. MANs are usually characterized by very high-speed connections using Fiber Optic Cable or other Digital media.