This part of ETS 300 175 gives an introduction and overview of the complete Digital European Cordless Telecommunications (DECT) Common Interface. This part contains an abstract of the other parts of the DECT standard together with a general description of: - the objectives of this ETS; - the DECT Common Interface; - the protocol architecture of DECT. This part also provides an extensive vocabulary@ in particular it contains the common definitions of all the technical terms used in different parts of this ETS.