The DCS as a Universal Digital Cross-Connect System

Existing DCS (digital cross-connect system) technology performs a subset of the digital cross-connect functions required in telecommunications networks. It must be used in tandem with other cross-connection systems such as DSX´s (digital signal cross-connect systems) and DF´s (distributing frames). It is these two technologies which provide most of the interconnection functions for digital facilities and equipment from the interoffice, subscriber loop, and central office parts of a network. Hence, if the DCS is to serve as a more universal digital cross-connect system, it must be enhanced to provide functions now performed by DSX´s and DF´s. This paper proposes expansion of DCS functions to incorporate some (or all) of the capabilities of the DSX and DF at discrete bit rates of the digital transmission hierarchy. Functional requirements, technology alternatives, planning/engineering issues, and operations/maintenance considerations are discussed.