适用于设计并计划直接连接到电信网络的设备，无论电源如何。 本基本安全出版物主要供技术委员会根据IEC指南104和ISO/IEC指南51中规定的原则编制标准时使用。它不适用于制造商或认证机构。 根据IEC指南104和ISO/IEC指南51，本标准具有基本安全出版物的地位。 本标准取消并取代1985年出版的IEC指南105。 2001年3月和2001年6月勘误表的内容已包含在本副本中。

Applicable to equipment designed and intended to be connected directly to a Telecommunication Network, regardless of the source of power. This basic safety publication is primarily intended for use by technical committees in the preparation of standards in accordance with the principles laid down in IEC Guide 104 and ISO/IEC Guide 51. It is not intended for use by manufacturers or certification bodies. This standard has the status of a basic safety publication in accordance with IEC Guide 104 and ISO/IEC guide 51. This standard cancels and replaces IEC Guide 105 published in 1985. The contents of the corrigenda of March 2001 and June 2001 have been included in this copy.