Private automatic branch exchange providing line appearance conn

Details Private automatic branch exchange providing line appearance conn Private automatic branch exchange providing line appearance conn

1975-03-25

1976-12-21

Brown, Thomas W.

H04Q 300

Patent

active

039990192

ABSTRACT:
An electronic private automatic branch exchange may avoid the need for access trunks and information trunks in the operator complex by utilizing a single stage switching matrix to effect connections between line circuits, trunk circuits, and the operator under control of the common control. To accomplish this the operator line circuits are provided and operator loop circuits as line appearances at the inputs of the matrix. In addition, the common control is provided with recognition circuitry for recognizing a request from a line for connection to the operator or a request by the operator for connection to a line and conversion circuitry for converting such requests to a multidigit designation of the operator line circuit or loop circuit to be acted upon by the system in the manner of a connection of a line circuit.

REFERENCES:
patent: 3197568 (1965-07-01), Wedmore et al.
patent: 3426158 (1969-02-01), Browne et al.
patent: 3786194 (1974-01-01), Pinede et al.
patent: 3789151 (1974-01-01), Richards
patent: 3859473 (1975-01-01), Brown et al.

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