规定所有电信运营商在提供电信网络时使用的电信ELV电源系统的要求；包括开利拥有ELV电源和受限访问位置的地方。定义在电信基础设施中使用的标准之间的分界点。规定了人身安全的最低要求。关键词:超低电压；弱电；电力系统；电信网络；限制进入的地点

Sets out requirements for telecommunications ELV power systems used by all telecommunications carriers in the provision of telecommunications networks; including where carrier owns ELV power supply and restricted access locations. Defines demarcation points between Standards when used in telecommunications infrastructure. Specifies minimum requirements for personal safety. Keywords: Extra-low voltage; ELV; power systems; telecommunications networks; restricted access locations