Optical transmission systems

Details Optical transmission systems Optical transmission systems

1985-10-03

1987-09-22

Safourek, Benedict V.

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

370 16, 455 8, H04B 900, H04L 122

Patent

active

046960600

ABSTRACT:
In an optical transmission system, particularly a submerged system, a line finding system is provided which, in the event of a fault somewhere along the system, enables the remaining operative lines or paths to take over the traffic and thus "steer around" the fault. The laser sources of the submerged repeaters and switched by electrical selection at their input using failed clock or a supervisory signal to achieve the switching.

REFERENCES:
patent: 3020398 (1962-02-01), Hyde
patent: 3035169 (1962-05-01), Griffith
patent: 3866121 (1975-02-01), Nakamura et al.
patent: 4435704 (1984-03-01), Hashimoto et al.
patent: 4581770 (1986-04-01), Haworth

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