CONTENTS

 1     Introduction and scope
        1.1     General
        1.2     Parameters to be measured
        1.3     Accuracy requirements of measurement
        1.4     Measurement method using echo, drop and generator DTEs
 2     References
 3     Abbreviations
 4     Measurement procedure
        4.1     Call set-up delay
        4.2     Data packet transfer delay
        4.3     Throughput
        4.4     Clear indication delay
 5     Characteristics of echo, drop, generator and test DTEs
        5.1     Common X.25 configuration and subscription parameters of the DTEs
        5.2     Echo DTE
        5.3     Drop DTE
        5.4     Generator DTE
        5.5     Test DTE
 6     Network location for echo, drop, generator and test DTEs