Power line carrier multi telephone extension system for full dup

Details Power line carrier multi telephone extension system for full dup Power line carrier multi telephone extension system for full dup

1982-09-30

1984-10-02

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

179 251, 179 18BC, H04M 1100

Patent

active

044751931

ABSTRACT:
In a power line carrier telephone extension system for transmitting electrical signals between the telephone line and an extension telephone over the AC electric power line available at a telephone subscriber's premises, that includes a main station for processing signals between the subscriber's telephone line and power lines and an extension telephone of the system that plugs into the power line, means that provides for a plurality of such extension telephones all of which can place calls to the telephone line, answer calls from the telephone line and conference together in full duplex communication.

REFERENCES:
patent: 3864521 (1975-02-01), Delong et al.
patent: 3949172 (1976-04-01), Brown et al.
patent: 4058678 (1977-11-01), Dunn et al.
patent: 4239940 (1980-12-01), Dorfman

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