This standard presents engineering design procedures for the electrical protection of telecommunication facilities serving electric supply locations through the use of optical fiber systems for the entire facility. Other telecommunication alternatives such as radio and microwave systems are excluded from this document. This standard presents workable methods that can be used with greater reliability to improve the electrical protection of telecommunication facilities serving electric supply locations through the use of optical fiber systems for the entire facility. Revision Standard - Active - Draft. Safe and reliable methods for the electrical protection of telecommunication facilities serving electric supply locations through the use of optical fiber systems for the entire facility are presented in this standard.