This document details definitions, methods of measurement, and minimum electro-acoustic performance characteristics for Code Division Multiple Access (CDMA) mobilestations. These standards are intended to ensure a level of electro-acoustic performanceapproaching that defined by the ITU-T for PSTN circuits. These electro-acousticrequirements are applicable to all Speech Service Options supported by the mobilestation. These requirements are applicable to mobile station handsets. Requirements forloudspeaker, headset, and hands-free configurations are not addressed in the current document and are for further study. Test methods are recommended in this document;however, methods other than those recommended may suffice for the same purpose.