This standard is applicable to mains-powered or battery-powered information technology equiptment, including electrical business equiptment and associated equiptment, with a RATED VOLTAGE not exceeding 600 V.This standard is also applicable to such information technology equiptment:- designed for use as telecommunication terminal equiptment and TELECOMMUNICATION NETWORK infrastructure equiptment, regardless of the source of power;- designed and intended to be connected directly to, or used as infrastructure equiptment in, a CABLE DISTRIBUTION SYSTEM, regardless of the source of power;- designed to use the AC MAINS SUPPLY as a communication transmission medi