Resumen
A communication system installed at an electric power facility performs the critical role in data acquisition and transmission, remote measuring and control, and communications. At the same time, it is most sensitive and the least protected from the high-altitude electromagnetic pulse (HEMP) amongst the wide variety of other critical electric and electronic systems used at the power facilities. Such a situation should not be considered as normal; instead it requires the appropriate measures to be taken. This article is an extension to the discussion of this problem started in the previous article [1]. It describes the common technology and element basis used for protection of communication system equipment.