This Technical Basis for Regulation (TBR) specifies the technical requ irements to be met by terminal equipment capable of connecting to a pu blic telecommunications network. These requirements apply to terminals for Phase 2 of the public land mobile radio service, operating in - the DCS 1 800 band; or - both in the DCS 1 800 band and the GSM 900 MHz band. with a channel separation of 200 kHz, utilizing constant envelope modu lation and carrying traffic channels according to the Time Division Mu ltiple Access (TDMA) principle. This TBR specifies the access requirements for terminals as stated abo ve implementing the GSM standard. For each test purpose and its corresponding conformance requirement, a reference is given to the test method in ETS 300 607-1 (GSM 11.10-1) [2]. The requirements apply at the air interface and the Subscriber Id entity Module - Mobile Equipment interface for the access requirements , which may be stimulated to perform the tests by additional equipment if necessary. The measurement uncertainty is described in ETS 300 607-1 (GSM 11.10-1 ) [2]. This TBR covers the essential requirements of the Terminal Directive 9 1/263/EEC [1] Articles 4d, 4e, 4f. Non access related aspects of speec h telephony, where Article 4g has been applied, are covered by TBR 32. The Terminal Directive 91/263/EEC [1] Articles 4a and 4b are covered b y other directives, and, therefore, not by this TBR. In this TBR, there are no Electromagnetic Compatibility technical requ irements in terms of the Terminal Directive 91/263/EEC [1], Article 4c . NOTE: Technical Requirements for EMC performance and testing of the eq uipment are covered by the relevant standards applicable to the EMC Di rective 89/336/EEC, annex A. Terminal equipment may be subject Co additional requirements in other Common Technical Regulations (CTR) depending on the equipments functio nality. ETS 300 607-1 (GSM 11.10-1) [2] constitutes the conformance test suite referenced by this TBR. The verification of the conformance requireme nts in this TBR is based on the tests described in this reference. The set of requirements in ETS 300 607-1 (GSM 11.10-1) [2] and the set of requirements in this TBR need not be identical. Some requirements only apply to specific types of mobile station (e.g. data tests only apply to mobile stations with a data facility). The T BR also indicates the specific test which should be carried out for ea ch mobile station type. An active accessory is covered by this TBR if it modifies the terminal performance in an aspect which affects conformance to essential requi rements. NOTE: Only active devices are subject to this TBR. Accessories may be tested with specific terminals, and either approved for use with those terminals only, or may possibly be approved for use with a wider rang e of terminals, depending on the nature and effect of the accessory.