Telephone intercom circuit

Patent

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179 18AD, H04M 906

Patent

active

042152488

ABSTRACT:
A multi-link intercom with a sequencing logic circuit for controlling a solid state switching matrix to connect station through an available link. Control information from the stations is decoded and stored in a register under sequence control for completion of a connection from a calling station to a called available station over an idle link.

REFERENCES:
patent: 3342944 (1967-09-01), Barbato et al.
patent: 3786194 (1974-01-01), Pinede et al.
patent: 4105876 (1978-08-01), Farrell et al.
patent: 4109113 (1978-08-01), Allison, Jr. et al.
patent: 4135063 (1979-01-01), Bosen
patent: 4136263 (1979-01-01), Williams

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