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ETSI EG 201 474
- Speech Processing, Transmission and Quality Aspects (STQ); Future approaches to speech transmission quality across multiple interconnected networks
- standard by European Telecommunications Standards Institute, 04/01/2000
- Publisher: ETSI
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This document identifies trends in the design of networks and choices of technology that affect speech transmission quality and are expected to lead to a wider range of quality levels that will be experienced by callers. The document reviews the implications of the ITU definitions of call quality categories and identifies the main impairment factors that need to be managed in order to provide specified levels of quality. The document explores the options for exchanging information between interconnected networks and concludes by specifying a Stage1 type of description for the exchange of quality parameter information about individual calls.
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