The Remote Monitoring and Alarm System (RMAS) is a system of electronic hardware and software for monitoring of fiber-optic video transmission equipment at Kennedy Space Center (KSC). The RMAS could also monitor other equipment that generates discrete contact closures and/or analog voltages. The hardware includes multiple remote terminal units (RTUs) that are collocated with, and gather both discrete and analog information from, the monitored equipment, and convert this information to RS-232 data streams. The RTUs are connected via point-to-point longhaul modem circuits to a 96-port codeactivated switch (CAS), that, in turn, connects specific RTUs to a monitoring computer workstation. Polling software running on the workstation periodically gathers data from each RTU and stores the data for processing by network-management software, which also runs on the workstation. The network-management software analyzes the data to generate a graphical representation of the fiber-optic video transmission equipment, with indications of any alarm conditions. Each RTU contains custom firmware that governs communication with the polling software and that, upon command by a user, implements diagnostic routines. A Simple Network Management Protocol agent links the polling software to the network-manager software via a custom management information base.

This work was done by Philip Gvozd, Matthew Smisor, and William Toler of Kennedy Space Center and Chris Kerios, Robert Chiodini, Pamela K. Schmidt, and Robert Swindle of Dynacs, Inc. For further information, access the Technical Support Package (TSP) free on-line at under the Electronic Components and Systems category. KSC-12314

NASA Tech Briefs Magazine

This article first appeared in the June, 2002 issue of NASA Tech Briefs Magazine.

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