CONTENTS

 1     Scope
 2     References
 3     Definitions
 4     Abbreviations
 5     Introduction
 6     Reference connections
        6.1     All-IP connections
        6.2     Interworking with PSTN/ISDN
                  6.2.1     IP-to-PSTN/ISDN or PSTN/ISDN-to-IP
                  6.2.2     IP-to-IP via PSTN/ISDN
                  6.2.3     PSTN/ISDN-to-PSTN/ISDN via IP
 7     Reference architectures
        7.1     HFC systems
        7.2     Other access technologies
 8     History