This Recommendation: ?C gives the characteristics of metal oxide varistors (MOVs) used in accordance with [b-ITU-T K.11] for the protection of power supply circuits and signal circuits of telecommunication installations against overvoltages; ?C does not deal with combinations of several MOVs connected in series and/or in parallel@ nor combinations of MOV with other components; ?C does not deal with mountings and their effect on MOV characteristics@ the characteristics apply to MOV as a component@ mounted only in the ways described for the tests; ?C does not deal with mechanical dimensions; ?C does not deal with quality assurance requirements.