Summary - K.63 (12/2025) - Maintaining the suitability of production telecommunication equipment to its intended electromagnetic environment

Recommendation ITU-T K.63 suggests some electromagnetic compatibility tests that may be used by both telecommunication operators and equipment manufacturers to determine the suitability of a batch of telecommunication equipment to its intended electromagnetic environment.
It is recognized that variation will occur between the electromagnetic compatibility performance of the telecommunication equipment item tested to demonstrate compliance with market entry requirements and the electromagnetic compatibility performance of telecommunication equipment items manufactured subsequently. Hence variation in the electromagnetic compatibility performance will be seen within a batch of telecommunication equipment either received by the telecommunication operator or manufactured by the equipment manufacturer.
Methods to allow both telecommunication operators and equipment manufacturers to demonstrate the compliance of a batch of telecommunication equipment are therefore needed. As it is not economically feasible to test the electromagnetic compatibility performance of every item within the batch, this Recommendation suggests that just three tests be performed on a small number of equipment items selected at random from the batch.
The recommended tests are radiated emissions, electrostatic discharge and electrical fast transient. It is the past experience of telecommunication operators that the largest variation in performance occurs for these three tests.
Telecommunication operators may therefore use this Recommendation to assure the suitability of a batch of equipment received from a manufacturer. Equipment manufacturers may use this Recommendation to monitor the variation in electromagnetic compatibility performance from their manufacture line.