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Browse Prior Art Database

Low-Cost Time Division Switch Module for Telephone Switching Applications

IP.com Disclosure Number: IPCOM000047162D
Original Publication Date: 1983-Oct-01
Included in the Prior Art Database: 2005-Feb-07

Publishing Venue

IBM

Related People

Authors:
Brady, RL Dunn, JM [+details]

Abstract

In contemporary telephone systems, voice and destination selection (dial number) signals are passed through switching exchanges which operate in either a space division or time division mode. Space division systems employ switching matrices which provide continuous circuit connections between linked user port units and may process the voice and selection signals in either analog or digital form. Time division multiplex (TDM) systems generally handle only digital signals, usually in PCM (Pulse Code Modulated) form, and employ time slot interchange units to pass voice and signal traffic between dynamically allocated time slots at incoming (source) and outgoing (destination) ports.