All-digital network transmission planning and terminal requirements

The development of a proposed transmission plan for an all-digital network is described. The main objectives of the plan are to obtain optimum end-to-end loudness grade-of-service, bit transparency, and echo control on all-digital connections and to ensure adequate transmission performance on hybrid connections, i.e. mixed analog/digital. These objectives are met by migrating connection loss, traditionally applied in the network, to the analog side of the digital/analog interface in the digital terminal. Thus the network transmission plan and digital access terminal characteristics are strongly interrelated. The proposed plan provides additional advantages including elimination of switched losses in the network when digital terminals are used and easy interconnection between networks (public and private)