Fault examining apparatus for loop-shaped data transmission syst

Details Fault examining apparatus for loop-shaped data transmission syst Fault examining apparatus for loop-shaped data transmission syst

1989-06-28

1992-06-02

Kuntz, Curtis

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359165, H04B 1008

Patent

active

051192225

ABSTRACT:
A fault examining apparatus is provided in a loop network system, in which a master station is connected sequentially with a plurality of follower stations in a loop transmission path to transfer digital optical signals denoting serial data information from the master station to the follower stations, from the follower stations to the follower stations or from the follower stations to the master station. The apparatus includes a device for detecting and storing a present value, a maximum value and a minimum value of a peak level value of received optical signals, and a display device for displaying the values.

REFERENCES:
patent: 3799675 (1974-03-01), Johnson et al.
patent: 4257125 (1981-03-01), Theall, Jr.
patent: 4648135 (1987-03-01), Labram
patent: 4715028 (1987-12-01), McMahon
"TAT-8 Supervisory Subsystem"; British Telecommunications Engineering, vol. 5, Jul. 1986; pp. 153-157.

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