ISO/IEC 27011:
sidevahendid, mis ühendatakse sidekanalivahendite ühe otsaga ja paigaldatakse osaliselt nende osalisse asukohta
= telecommunications facilities which are to be connected to one end of telecommunications circuit facilities and part of which is to be installed on the same premises (including the areas regarded as the same premises) or in the same building where any other part thereof is also to be installed