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ETSI ETR 261-4

M00000957

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ETSI ETR 261-4 Human Factors (HF); Assessment and definition of a harmonized minimum man-machine interface (MMI) for accessing and controlling public network based supplementary services; Part 4: Experimental comparison of the effect of categorized and non-categorized formats within user instructions

standard by European Telecommunications Standards Institute, 10/01/1996

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To publish the summarized results of the phase 1 study and experimental trials together with the results of the experiment evaluation of the draft ETS. A multipart ETR is planned with seven separate parts