Fiber optic loop system with bypass mode

Details Fiber optic loop system with bypass mode Fiber optic loop system with bypass mode

1982-10-22

1985-10-01

Griffin, Robert L.

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

455607, 371 8, H04B 900

Patent

active

045450749

ABSTRACT:
An optical data is transmitted from station to station through an optical T-coupler attached to each station. The optical T-coupler splits the data signals into two paths with identical data being transmitted to the attached station and also the succeeding station. An optical to electronic conversion takes place as the data enters the station. Electronic digital switching within each station selects a "normal" mode of receiving data from the preceding station when data is valid or a "bypass" mode of receiving data from the station which precedes the preceding station. Switching from normal to bypass mode is performed by electronic switching and requires no optical switches.

REFERENCES:
patent: 3652867 (1972-03-01), Zinn
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patent: 3870398 (1975-03-01), Love
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patent: 4072399 (1978-02-01), Love
patent: 4112293 (1978-09-01), Kach
patent: 4144414 (1979-03-01), Nicholas
patent: 4166946 (1979-09-01), Chown et al.
P. Abramson and F. E. Noel, "Fiber-optic Transmission System With Bypassable Repeaters", IBM Technical Disclosure Bulletin, vol. 25, No. 1, Jun. '82.

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