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Designers involved in the ac power side of telecommunications equipment have been justifiably concerned with surge protection because field experience is rich in case histories of failures attributable to transient overvoltages. Insufficient knowledge of the exact nature of these overvoltages, however, has made their task difficult in the past. After several years of data collection by a number of...
Sources of problems which may affect the data processing (DP) and telecommunications operations are related to either software problems, hardware malfunctions or environmental conditions. Included in the latter category are input power problems, grounding type problems and failure of the support equipment such as the HVAC system, smoke and fire alarm system, security system, etc. Among all of these...
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