WDM standards: a first impression

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Abstract
Wavelength Division Multiplexing (WDM) technology can be used to create high-capacity, rearrangeable, survivable networks for the transport of broadband services. A key factor in the successful commercialization of multi-wavelength optical networks is the availability of standards for WDM point-to-point and optical networking transmission systems. International standards recommendations are currently being formulated in the ITU (formerly CCITT) in a number of Study Groups related to multiwavelength transmission systems. In this paper, a review will be presented on the status of the recommendations in the current study period, focusing on point-to-point OC-48 WDM systems. Transmission signal parameters such as reference frequency, frequency spacing, and optical signal power levels, as well as optical supervisory channel specifications are being addressed currently. A future set of specifications related to optical networking systems will be addressed in the study period extending from 1997 to 2000.

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