the standard of a telecommunication voice provider is essentially inftuenced by way of the standard of the transmission method. however, the research, synthesis and prediction of caliber may still bear in mind its multidimensional elements. caliber might be considered as some extent the place the perceived features and the specified or anticipated ones meet. A schematic is gifted which classifies diverse entities which give a contribution to the standard of a provider, taking into consideration conversational, consumer as weIl as carrier similar contributions. ranging from this idea, perceptively correct materials of speech verbal exchange caliber are pointed out. The perceptive elements end result from ele­ ments of the transmission configuration. A simulation version is constructed and carried out which permits the main appropriate parameters of conventional trans­ project configurations to be manipulated, in actual time and for the dialog state of affairs. Inputs into the simulation are instrumentally measurable caliber components widely used in transmission making plans of cellphone networks. a discounted set of those caliber components types a foundation for versions which goal at predicting mouth-to-ear caliber because it will be perceived by way of a person of the sys­ tem. those versions are an immense software for the planner of telecommunication networks, as they permit the predicted caliber to be predicted upfront, even sooner than the community has been organize. famous versions (the SUBMOD and the E-model) are analyzed in additional aspect, with an emphasis at the psy­ choacoustic and psychophysical backgrounds.