This Technical Basis for Regulation (TBR) specifies the technical characteristics to be provided by terminal equipment which is capable of connection to a Global System for Mobile communications (GSM) Public Land Mobile Network (PLMN) and which uses Digital Enhanced Cordless Telecommunications (DECT) for network access. The cordless transmissions for such terminal equipment operate within the frequency band 1 880 – 1 900 MHz. A DECT terminal equipment comprises two elements, referred to as a Fixed Part (FP) and Portable Part (PP). The objective of this TBR is to ensure air-interface interoperability between a FP and PP which follow the DECT/GSM interworking profile (IWP) (see note 2), where these parts are capable of 3,1 kHz telephony applications, and where the Fixed Part is connected to a GSM PLMN in order to provide GSM services (according to TBR 19 and TBR 20) over the DECT air-interface. For functional parts of a FP, that are terminal quipment, which are declared to conform to the basic CTRs for DECT (see note 1) and to the DECT/GSM IWP, the requirements of this TBR shall apply, in addition to the attachment requirements for the appropriate GSM PLMN. This TBR does not apply to FPs where they form a part of the GSM PLMN.