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ETSI ES 202 737
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ETSI ES 202 737 Speech and multimedia Transmission Quality (STQ); Transmission requirements for narrowband VoIP terminals (handset and headset) from a QoS perspective as perceived by the user
standard by European Telecommunications Standards Institute, 07/01/2017
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Full Description
The present document provides speech transmission performance requirements for 4 kHz narrowband VoIP handset andheadset terminals; it addresses all types of IP based terminals, including wireless and soft phones.In contrast to other standards which define minimum performance requirements it is the intention of the presentdocument to specify terminal equipment requirements which enable manufacturers and service providers to enable goodquality end-to-end speech performance as perceived by the user.
In addition to basic testing procedures, the present document describes advanced testing procedures taking into accountfurther quality parameters as perceived by the user.
It is the intention of the present document to describe terminal performance parameters in such way that the remainingvariation of parameters can be assessed purely by the E-model.