Institute for Telecommunication Sciences
the research laboratory of the National Telecommunications and Information Administration

David F. Peach; Robert T. Adair

Abstract: The Mu1itier Specification was developed to provide guidelines and recommendations for improving the durability of the communication installations necessary for National Security/Emergency Preparedness (NSEP). The application of the Multitier Specification is considered beyond the installation and engineering requirements of typical commercial fiber optic systems. Five levels of hardness are defined in the specification. A link that could be important (may be asked to provide service) to the operation of the U.S. Space Command/NORAD was chosen as a candidate for this analysis. Based on the time critical nature of the telecommunication traffic carried on this link and the stress expected, the Level 4 (Maximum) hardness was chosen as the target level for upgrade of this link. The elements of the existing system are classified into levels using the Mulitier Specification. This report describes the enhancements necessary to mitigate the stress threat within the guidelines of the Mulitier Specification and to raise the level of hardness to Level 4 (Maximum). The cost associated with the installation of these enhancements is included. Solutions to problems peculiar to the path specified for the link are described in terms of one suggested alternative. Also, an estimate of the additional initial investment required to harden the system to Level 4 (Maximum) is included.

Keywords: telecommunication systems; cost projections; durability; enhancements; fiber optic link; guidelines; hardness level; National Security/Emergency Preparedness (NSEP); stress threat; U.S. Space Command/NORAD; multitier specification

To request a reprint of this report, contact:

Lilli Segre, Publications Officer
Institute for Telecommunication Sciences
(303) 497-3572

Disclaimer: Certain commercial equipment, components, and software may be identified in this report to specify adequately the technical aspects of the reported results. In no case does such identification imply recommendation or endorsement by the National Telecommunications and Information Administration, nor does it imply that the equipment or software identified is necessarily the best available for the particular application or uses.

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