Optical communication apparatus and method for telephone supervi

Details Optical communication apparatus and method for telephone supervi Optical communication apparatus and method for telephone supervi

1987-01-29

1989-03-28

Griffin, Robert L.

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

379379, 455601, 455612, 455617, H04B 900

Patent

active

048172049

ABSTRACT:
The invention is for an optical communication apparatus for bidirectionally transmitting and receiving supervisory and audio signals. The apparatus includes a telephone line interface unit that receives electric audio and supervisory signals and converts them to optical signals. It is also includes means for receiving optical signals representing audio and supervisory signals. A data unit receives the optical audio and supervisory signals from the interface unit and converts them to electric audio and supervisory signals, and also includes means for receiving electric audio signals and supervisory signals and converting them to corresponding optical signals. An optical link connects the telephone line interface unit and data unit for bidirectional optical communication. A method of practicing the invention is also included.

REFERENCES:
patent: 4045615 (1977-08-01), James et al.
patent: 4056719 (1977-11-01), Waaben
patent: 4087643 (1978-05-01), Joslow et al.
patent: 4449247 (1984-05-01), Waschka
patent: 4475011 (1984-10-01), Brightman et al.
patent: 4591663 (1986-05-01), Sullivan
patent: 4601064 (1986-07-01), Shipley
Fiber Optic Phone System, Cord Electronics.

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