ITU-T Rec. I.413 (1991) – B-ISDN USER-NETWORK INTERFACE
FOREWORD
Preamble to B-ISDN Recommendations
1 Introduction
2 Reference configuration at the user-network interface
    2.1 Functional groups and reference points
    2.2 Examples of physical realizations
    2.3 Basic characteristics of the interfaces at TB and SB reference points
        2.3.1 Characteristics of the interfaces at 155.520 Mbit/s
        2.3.2 Characteristics of the interfaces at 622.080 Mbit/s
    2.4 Relationship between ISDN interfaces
    2.5 Application of B-ISDN model to functional groups
        2.5.1 General
        2.5.2 Network termination 1 (B-NT1) for B-ISDN
        2.5.3 Network termination 2 (B-NT2) for B-ISDN
        2.5.4 Terminal equipment (B-TE) for B-ISDN
        2.5.5 Terminal adaptor (B-TA) for B-ISDN
3 Physical layer information flows and interface functions
    3.1 Relation with other sublayers or entities
        3.1.1 Information exchanged between the PM and the TC sublayers
        3.1.2 Information exchanged between the physical layer and the ATM layer
        3.1.3 Information exchanged between the physical layer and the management plane
    3.2 Modes of operation
    3.3 Interface function
        3.3.1 Data transfer
        3.3.2 Timing
        3.3.3 Bit sequence independence
        3.3.4 Provision of power feeding
        3.3.5 Activation/deactivation
4 UNI related OAM functions
ANNEX A – Alphabetical list of abbreviations used in this Recommendation