This European Telecommunication Standard (ETS) defines the aspects of the Digital Enhanced Cordless Telecommunications (DECT) Authentication Module - Portable Equipment (DAM-PE) interface which is based on 3 Volt (3 V) technology to be used in the Portable Part (PP). It specifies the electrical and logical requirements necessary for the operation of the 3 V DAM-PE interface where it differs from ETS 300 331 [1]. For all aspects of the DAM-PE interface which are not covered by this ETS@ ETS 300 331 [1] applies. This ETS is based upon ETS 300 641 [2] which specifies the same requirements for the 3 Volt Subscriber Identity Module (SIM).