CONTENTS

�1���� Scope
�2���� References
�3���� Definitions
�4���� Abbreviations
�5���� General considerations
������� 5.1���� Call-level GOS
������� 5.2���� Cell-level GOS
������� 5.3���� Effect of CAC
�6���� Reference architecture
�7���� Reference connections for GOS parameters at the call and cell level
�8���� GOS parameters at the call level
������� 8.1���� Definition of grade of service parameters
����������������� 8.1.1���� Post-selection delay
����������������� 8.1.2���� Answer-signal delay
����������������� 8.1.3���� Connection-release delay
����������������� 8.1.4���� Probability of end-to-end blocking
�9���� GOS parameters at the cell level
������� 9.1���� Cell-based GOS parameters
������� 9.2���� Frame-based GOS parameters
������� ����������9.2.1���� Frame transmission delay
����������������� 9.2.2���� Frame discard ratio
������� 9.3���� Throughput GOS parameters
10���� Target values for GOS parameters at the call level
������ 10.1���� Considerations for target values
������ 10.2�� ��Specification of target values
11���� Target values for GOS parameters at the cell level
12���� History
Annex A - Explanation of basis for target values for post-selection delay,� answer-signal delay, and connection-release delay