Abstract
Remote monitoring of the status of in-line repeaters in optical telecommunication links appears to be one of the most relevant features of these systems, allowing immediate action in case of misfunction or failure of unattended or unaccessible equipment. In standard optoelectronics repeaters the conversion of the signal from optical to electrical (and vice versa) allows to add to the data stream relayed into the subsequent portion of the line some additional information about the operative parameters of the repeater unit. This is most conveniently done by allotting in the TDM frame a low-speed service channel for telemetry.
© 1992 Optical Society of America
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