Multitier Specification Applied to Modify the Hardness of an Essential NSEP (National Security/Emergency Preparedness) Fiber Optic Link

摘要

The Mulitier 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 the 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. The 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.