Permanent connection public telephone appliance

Details Permanent connection public telephone appliance Permanent connection public telephone appliance

1989-05-12

1990-05-15

Dwyer, James L.

Telephonic communications

With check operated control

379413, H04M 1900

Patent

active

049264664

ABSTRACT:
A permanent connection public telephone appliance is provided for connection to the switched network by a connection unit. It is permanently fed with power romotely by a source of the connection unit connected in parallel across the line of the appliance. The switched network is isolated from the source by capacitors. Line connection to the appliance is provided by a relay of the connection unit.

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