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Abstract
Dependable power for optimum uptime and reliability is the key to performance for telecommunications networks. Products that are NEBS-compliant assure the customer that the equipment meets industry requirements for personal safety, facilities protection and continuity of operation. NEBS - which stands for network equipment building system - are guidelines originated by Bell Laboratories in the 1910s to assist equipment manufacturers in designing products that were compatible with the telecom environment. The intention was to reduce product development, installation and maintenance. Since their introduction, the comprehensive NEBS requirements have evolved to include criteria for many physical and electrical aspects of telecom equipment. To assure that equipment is satisfactory for its intended use in various applications, three levels of criteria compliance have been established for telecom equipment. Because the level of compliance has a direct effect on the cost to manufacture the equipment, users can minimize their expenditures by understanding what level or compliance required for the equipment they plan to install.