CONTENTS

�1���� Introduction
�2���� Scope
�3���� References
�4���� Terms and definitions
�5���� Abbreviations and acronyms
�6���� General consideration on test call measurement for ISDN
�7���� NP/QOS ISDN parameters considered
������� 7.1���� Test call measurements to assess NP/QOS parameters for ISDN calls using 64 kbit/s UDI single channel
����������������� 7.1.1���� Call setup phase
����������������� 7.1.2���� User information transfer phase
����������������� 7.1.3���� Call disengagement phase
������� 7.2���� Test call measurements and criteria to assess NP parameters for ISDN calls using 64 kbit/s UDI multiple channels
����������������� 7.2.1���� Assessment of NP/QOS parameters for multi-channel calls
����������������� 7.2.2���� Specific NP/QOS parameters for multi-channel ISDN communications
�8���� Consideration on ISDN calls using Primary Rate Interface
Annex A -Calculation methods and procedures to derive NP/QOS parameters
Annex B - Data collection principles and statistical procedure
�� �����B.1���� Composition of ISDN speed criterion related performance parameters
������� B.2���� Composition of ISDN dependability criterion related performance parameters
Annex C - Statistical treatment of ISDN NP parameters