CONTENTS

 1     Introduction
        1.1     Purpose
        1.2     Test philosophy
 2     Source recordings
        2.1     Apparatus and environment
        2.2     Speech material
        2.3     Procedure
        2.4     Calibration signals and speech levels
 3     Simulating system load
        3.1     Requirements for a generic voice load simulator
        3.2     Determining load capacity of tested systems
        3.3     Controlling load applied to tested systems
 4     Processing of the speech
 5     Test design
        5.1     Test No. 1 – Effect of applied load
        5.2     Test No. 2 – Effect of digital errors in the DCME control channel
 6     Listening test procedure
 7     Analysis of results
Annex  A – Description of Digital Circuit Multiplication Equipment
        A.1     Definitions
        A.2     Digital Speech Interpolation (DSI)
        A.3     Speech Detection
        A.4     DCME load
        A.5     Overload strategies
        A.6     Silence reconstruction methods
        A.7     Circuit versus packet mode
        A.8     Packet reconstruction
Annex  B – Speech material used to construct speech sequences
Annex  C – Instructions on the use of a limited number of sentences