Table of Contents

Foreword<br>1 General<br>&nbsp;&nbsp;&nbsp;1.1 Scope<br>&nbsp;&nbsp;&nbsp;1.2 Normative references<br>2 General description<br>&nbsp;&nbsp;&nbsp;2.1 Basic vocabulary<br>&nbsp;&nbsp;&nbsp;2.2 Layers and protocols<br>&nbsp;&nbsp;&nbsp;2.3 Specification language<br>3 Physical layer<br>&nbsp;&nbsp;&nbsp;3.1 Physical+ protocol<br>&nbsp;&nbsp;&nbsp;3.2 V.24/V.28 environment<br>&nbsp;&nbsp;&nbsp;3.3 Automatic call/answer: V.25/V.25bis environment<br>&nbsp;&nbsp;&nbsp;3.4 General information<br>&nbsp;&nbsp;&nbsp;3.5 Timing diagram: half-duplex mode<br>&nbsp;&nbsp;&nbsp;3.6 Timing diagram: full-duplex mode<br>&nbsp;&nbsp;&nbsp;3.7 Physical services and service primitives<br>&nbsp;&nbsp;&nbsp;3.8 Physical parameters<br>&nbsp;&nbsp;&nbsp;3.9 State transitions: half-duplex mode<br>&nbsp;&nbsp;&nbsp;3.10 State transitions: full-duplex mode<br>&nbsp;&nbsp;&nbsp;3.11 List and processing or errors<br>4 Data Link layer<br>&nbsp;&nbsp;&nbsp;4.1 Link+ protocol<br>&nbsp;&nbsp;&nbsp;4.2 General information<br>&nbsp;&nbsp;&nbsp;4.3 'Send and wait' procedure<br>&nbsp;&nbsp;&nbsp;4.4 Data link services and service primitives<br>&nbsp;&nbsp;&nbsp;4.5 Frame description<br>&nbsp;&nbsp;&nbsp;4.6 Data integrity and transmission efficiency<br>&nbsp;&nbsp;&nbsp;4.7 Management of exchanges<br>&nbsp;&nbsp;&nbsp;4.8 Data link parameters<br>&nbsp;&nbsp;&nbsp;4.9 State transitions<br>&nbsp;&nbsp;&nbsp;4.10 List and processing of errors<br>5 Application layer<br>&nbsp;&nbsp;&nbsp;5.1 Transport sublayer<br>&nbsp;&nbsp;&nbsp;5.2 Application sublayer<br>Annex A (normative) Specification language<br>Annex B (normative) List of fatal errors<br>Annex C (informative) Profiles <br>Annex D (normative) Principle of the cyclical redundancy <br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;check (CRC)<br>Annex E (informative) Data integrity<br>Annex F (informative) Transmission efficiency

Abstract

Gives a description of a three layer data exchange architecture that is used for communication with large industrial and commercial customer's metering equipment (particularly aimed at the remote reading of these meters for billing purposes).

General Product Information

Published
Document Type	Standard
Status	Current
Publisher	International Electrotechnical Committee
Pages
ISBN
Committee	TC 13