CONTENTS

�1���� Scope
�2���� References
�3���� Abbreviations and definitions
������� 3.1���� Abbreviations
������� 3.2���� Definitions
�4���� ISDN customer access
�5���� B‑ISDN customer access
Appendix I � Examples of access network implementation and the related basic� requirements on V_B interfaces
������� I.1���� Introduction
������� I.2���� Examples of access network implementation and the related basic requirements
������� I.3���� Specific interfaces for UNI and SNI
������� I.4���� Performance parameters