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