CONTENTS

 1     Scope
 2     References
 3     Terms and definitions
 4     Abbreviations
 5     Measurement of network parameters
        5.1     Measurement point location and measurement process
        5.2     ATM reference events and outcomes (anomalies and defects)
        5.3     Physical layer reference events and outcomes (anomalies and defects)
        5.4     ATM network performance parameters
        5.5     Measurement modes
 6     Out-of-service measurement mode
        6.1     Generation of traffic at the ATM layer
        6.2     Test cell payload format
                  6.2.1     Revision 0 test cell payload format
                  6.2.2     Revision 1 test cell payload format
        6.3     Test traffic profiles
                  6.3.1     Standard traffic generator
                  6.3.2     Enhanced traffic generator
        6.4     Background traffic
        6.5     OAM traffic
        6.6     Simulation of anomalies and defects
        6.7     CLP flow measurements
        6.8     Measurement process
                  6.8.1     Cell monitoring process
                  6.8.2     Outcome monitoring process
                  6.8.3     Availability monitoring and storage control process
        6.9     Network performance parameters calculation
                  6.9.1     Error-related network performance parameters
                  6.9.2     Availability-related network performance parameters
                  6.9.3     Delay-related network performance parameters
       6.10     UPC/NPC performance parameters
 7     In-service measurement mode
        7.1     Network performance parameters estimation
                  7.1.1     Monitored cell flows
                  7.1.2     Error-related network performance parameters
                  7.1.3     Availability-related network performance parameters
                  7.1.4     Delay-related network performance parameters
 8     Physical interfaces of the AME
        8.1     General interface characteristics and bit rates
        8.2     Specific generator interface characteristics
        8.3     Specific receiver interface characteristics
        8.4     Information available at physical interfaces
 9     Miscellaneous functions
        9.1     Event timestamping
        9.2     Output to recording devices
        9.3     Remote control
10     Operating conditions
       10.1     Environmental conditions
       10.2     Behaviour in case of power failure
Annex A - Criteria for the detection of anomalies, defects and indications
Annex B - Measurement algorithms
Annex C - Test cell payload scrambling/descrambling
        C.1     Scrambling/descrambling
        C.2     Scrambling and CRC
Appendix I - Examples of use of the different measuring modes
        I.1     Use of the out-of-service measurement mode
        I.2     Use of the in-service measurement mode
                  I.2.1     End-to-end test
                  I.2.2     Segment test
                  I.2.3     UPC/NPC testing
        I.3     Combined use of out-of-service and in-service measurement modes