The present document provides the user requirements for HSD translated into terms of: HSD applications and net data rates to support non-voice applications; data rate capacity in addition to TETRA Release 1 V+D; RF coverage requirements for HSD; frequency spectrum efficiency requirements; integration of HSD with TETRA Release 1 V+D services; compatibility of HSD with TETRA Release 1 V+D services; HSD Call Types; Backward Compatibility with TETRA Release 1; migration from TETRA Release 1; availability of HSD; relative importance of HSD user requirement criteria. The present document is applicable to the specification of TETRA Release 2 equipment. The user requirements contained in this URS are described in non-technical terms and are based on an analysis of the results for High Speed Data from the TETRA Release 2 Market Questionnaire (see bibliography)@ described in TR 102 021-1 [i]@ clauses 4.2 and 4.3. This URS does not offer any technical solutions as they are considered the responsibility of EPT/WG4.