Microwave radio in the British Telecom access network

Describes new developments and new applications of microwave radio systems in the British Telecom access network. Working from the background of predominantly trunk use of microwave radio, the assets of radio pertinent to the junction and local networks are highlighted. For radio to enjoy general application in the access network, it must be both easy to use and cost effective compared to cable solutions. An example where both of these conditions are satisfied is the growing use of 18 GHz radio for MegaStream customer links. The author then looks at other potential applications of this type of point-to-point-link, revealing possibilities in the junction network for closing transmission rings and/or alternative routing, and as a local loop relief system. The possible use of multipoint radio systems in the local loop is examined and an overview of British Telecom´s current technical and economic studies on the use of these systems is presented. Although presently available multipoint systems are not likely to find general use in local network modernization, the potential use as a rural overlay is exposed, and a design brief for an `ideal´ radio distribution system is discussed