Optical: systems and elements – Deflection using a moving element – Using a periodically moving element
Patent
1997-08-29
1999-11-02
Negash, Kinife-Michael
Optical: systems and elements
Deflection using a moving element
Using a periodically moving element
359166, 370907, H04B 1008
Patent
active
059781130
ABSTRACT:
The Remote SONET/SDH Loopback (RSL) is an optical network interface device consisting of a facility interface 24, a drop side interface 26, a facility receive signal splitter 12, a drop side receive signal splitter 18, an idle signal generator 16, a command logic assembly 10, and a switching circuit assembly 22. The RSL addresses the need for a low-cost sub-section layer device by efficiently processing the SONET signal to support only loopback and idle signal generation. The RSL may be provisioned to either loopback the facility or generate an idle signal when the drop side of the termination is disconnected, turned-off, or has otherwise failed to generate a valid signal. The SONET signal may also be looped back upon itself when a user controlled loopback command code is detected within the SONET overhead. The RSL otherwise passes the SONET signal unaltered. The RSL may be provisioned by the user to specify the location and characteristics of the embedded loopback command codes.
REFERENCES:
patent: 5623357 (1997-04-01), Kight et al.
patent: 5872780 (1999-02-01), Demiray et al.
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