I.S. ETS 300 012:1993

Foreword
1 Scope
2 Normative references
3 Definitions
4 Abbreviations and symbols
5 Conformance
6 Requirements
7 Additional requirements
  7.1 Limitations on power source and
      sink during transient conditions
  7.2 Current unbalance
  7.3 Additional requirements for an Auxiliary
      Power Supply (APS)
  7.4 Additional requirements for NT1 restricted
      mode source for compatibility with an APS
Annex A (normative): Statements, modification and additional
                      requirements to CCITT Recommendation
                      I.430 [2]
      Definitions
Annex B (normative): Additional requirements applicable
                      to the (explicit) S reference point
  B.1 Introduction
  B.2 References
  B.3 Definitions
  B.4 Conformance
  B.5 Requirements
  B.6 Provision of power
Annex C (informative): TE design to minimise power
                       disturbance
Annex D (normative): Conformance test principles to
                       Interface Point I[a]
  D.1 Scope and general information
  D.2 Functional characteristic tests
  D.3 Interface procedure tests
  D.4 Electrical characteristics tests
  D.5 Power feeding
Annex E (normative): Conformance test principles to
                       interface point I[b]
  E.1 Scope and general information
  E.2 Functional characteristic tests
  E.3 Interface procedure tests
  E.4 Electrical characteristic tests
  E.5 Power feeding
  E.6 Auxiliary power supply

Defines requirements and test principles for the ISDN basic rate user-network interface including the physical, electrical and functional characteristics and the information exchange with higher layers.