Table of Contents

Foreword
Introduction
1 Scope
2 Normative references
3 Definitions and abbreviations
  3.1 Definitions
  3.2 Abbreviations
4 Modes of operation and signalling rates
  4.1 Types of operation
  4.2 Data signalling rate
5 Safety and EMC requirements
  5.1 Safety requirements
  5.2 EMC requirements
6 Electrical, mechanical, and access control protocol
  requirements
  6.1 General characteristics
      6.1.1 Generator presentations
      6.1.2 Receiver presentations
  6.2 Connector characteristics and contact number
      assignments
      6.2.1 Attachment to a DCE interface presented
            on a 25-pole connector
      6.2.2 Attachment to a DCE interface presented
            on a 26-pole connector
      6.2.3 Attachment to a DCE interface presented
            on a 37-pole connector
      6.2.4 Attachment to a DCE interface presented
            on a 34-pole connector
      6.2.5 Attachment to a DCE interface presented
            on a 15-pole connector
  6.3 Electrical requirements
      6.3.1 Requirements for attachment to CCITT
            Recommendation V.10 interchange circuits
      6.3.2 Requirements for attachment to CCITT
            Recommendation V.11 interchange circuits
      6.3.3 Requirements for attachment to CCITT V.28
            interchange circuits
      6.3.4 Requirements for attachment to CCITT
            Recommendation V.35 interchange circuits
      6.4 X.25 link layer (layer 2) requirements
      6.5 X.25 packet layer (layer 3) requirements
7 TBR Test Specification
  7.1 Conditions of test
      7.1.1 Environment for tests
      7.1.2 Power supply limitations
      7.1.3 Test condition
      7.1.4 Test point
      7.1.5 Bit patterns
      7.1.6 Signal element timing
      7.1.7 Data signalling rates
      7.1.8 Interchange circuits presentation
      7.1.9 Physical layer tests
  7.2 Test descriptions for connector characteristics
      and contact number assignments
      7.2.1 25-pole connector
      7.2.2 26-pole connector
      7.2.3 37-pole connector
      7.2.4 34-pole connector
      7.2.5 15-pole connector
  7.3 Test descriptions for attachment to CCITT V.10
      interchange circuits
      7.3.1 Generator characteristics
  7.4 Test descriptions for attachment to CCITT
      Recommendation V.11 interchange circuits
      7.4.1 Generator characteristics
  7.5 Test descriptions for attachment to CCITT V.28
      interchange circuits
      7.5.1 Generator characteristics
      7.5.2 Receiver characteristics
  7.6 Test descriptions for attachment to CCITT
      Recommendation V.35 interchange circuits
      7.6.1 Generator characteristics
  7.7 TBR 2 Test Case Selection Expression Definition
      table
  7.8 Test case Index
Annex A (normative): The TBR Requirements Table (TBR-RT)
      A.1 Introduction to the TBR-RT
      A.2 Format of the tables
      A.3 Notations used in the TBR-RT
      A.4 The TBR Requirement Tables
Annex B (normative): Physical layer implementation extra
        information for testing (PIXIT)
Annex C (informative): Explanatory note to TBR
      C.1 Purpose of TBR 2
      C.2 Title and scope
      C.3 Relationship to NET 2
      C.4 NET to TBR conversion process
      C.5 Means of connection to the DCE
Annex D (informative): Bibliography
History

Abstract

Defines the technical characteristics (electrical and mechanical interface requirements) and access control protocol to be provided by packet mode terminal equipment intended for connection to a dedicated interface of a Packet Switched Public Data Network (PSPDN) using CCITT Recommendation X.25 [1], [2] and [3] making use of Link Access Procedure Balanced (Modulo 8 operation) (LAPB) and Link Access Procedure Balanced (Modulo 128 operation) (LAPB Extended) modes of operation.

General Product Information

Published
Document Type	Standard
Status	Current
Publisher	European Telecommunications Standards Institute
Pages
ISBN
Committee	DTA