Multifrequency tone distribution using a conference arrangement.

摘要

There is disclosed a multifrequency tone distribution arrangement for a communication system having a common time division multiplexed bus (A, B) in which digital samples of tone frequencies are supplied from a central signal generating circuit (100) to system port circuits (200) via selected time slots under the control of a central call processor (300). Each port circuit automatically accepts selected signals from the common bus for conferencing to produce multifrequency digit tones and service tones.