This Technical Basis for Regulation (TBR) specifies the technical requirements to be met by terminal equipment capable of connecting to a public telecommunications network. These requirements apply to terminals for Phase 2 of the public land mobile radio service, operating in the 900 MHz band with a channel separation of 200 kHz, utilising constant envelope modulation and carrying traffic channels according to the Time Division Multiple Access (TDMA) principle. This TBR specifies the terminal equipment access requirements for the GSM 900 version of the Global System for Mobile communications (GSM). 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) . The requirements apply at the air interface and the Subscriber Identity Module – Mobile Equipment interface for the access requirements, which may be stimulated to perform the tests by additional equipment if necessary.