Integrated message accounting system

Details Integrated message accounting system Integrated message accounting system

1977-03-25

1979-10-23

Stewart, David L.

179 15BS, H04Q 1104, H04J 312, H04J 306

Patent

active

041722140

ABSTRACT:
An integrated message accounting system for use in a telephone system operating in time frames each consisting of a plurality of time slots. The system includes line groups each having a number of primary and secondary input and output portions for receiving input data signals and transmitting output data signals where one or the other of the primary and secondary portions is activated for receiving and transmitting the input and output signals. The system also includes a second number of time slot interchangers for connecting the active input portions to the active output portions where one of the interchangers is activated for connecting the input portions to the output portions. The system also includes a system controller for activating the primary or secondary portions and one of the interchangers.

REFERENCES:
patent: 3629846 (1971-12-01), Thompson
patent: 3920916 (1975-11-01), Brightman

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