In compliance with the European Communities (Radio Equipment and Telecommunications Terminal Equipment) Regulations (S.I. 240 of 2001) and in accordance with Article 4.2 of the Radio and Telecommunications Terminal Equipment (R&TTE) Directive, public telecommunications network operators are required to publish accurate and adequate technical specifications about their interfaces. The information supplied must be sufficiently detailed to allow the design of telecommunications terminal equipment capable of using all services provided through the corresponding interfaces. To fulfil this obligation, the Network Interface Publication (Microsoft Word document, 160KB) contains the relevant information necessary to specify Vodafone's various radio network interfaces. The structure of the document has been informed by the European Telecommunications Standards Institute guidelines for describing radio access interfaces (ETSI EG 201 838).