A Digital Subscriber Carrier System for the Evolving Subscriber Loop Network

Subscriber carrier systems such as DMS-1
^(TM)
are currently being widely used for rural outside plant relief applications. However, there is a much larger application base for subscriber carrier in urban areas. Urban carrier systems will require significantly different features compared with rural systems. The applicability of these systems in urban loop plant is discussed and a system being designed by Northern Telecom and Bell-Northern Research to complement the existing DMS-1 system is described.