Table of Contents

Foreword
Introduction
1 Scope
2 References
3 Definitions and abbreviations
  3.1 Definitions
  3.2 Abbreviations
4 Access arrangements
  4.1 Network Termination Points (NTPs)
  4.2 DTE/modem interface requirements
  4.3 Modem requirements
  4.4 Setting up the access information path
  4.5 Disconnecting the access information path
  4.6 Error correcting capabilities
  4.7 Loops
5 PAD command and service signals
  5.1 PAD command signals
  5.2 PAD service signals
6 PAD internal variables relating to CCITT Recommendation X.28
  indirect access
  6.1 PAD parameters and parameter values
  6.2 PAD constants
  6.3 8-bit start-stop mode DTE access to the PAD
7 Facilities
8 Procedures between the start-stop mode DTE and the PAD
  8.1 Procedures for establishing the access information path
  8.2 Procedures for service initialization
  8.3 Procedures for the exchange of control information
  8.4 Procedures for the exchange of the user data between a
       start-stop mode DTE and a PAD
  8.5 Procedures for clearing
  8.6 Procedures for setting, changing and reading the values of
       PAD parameters
  8.7 Procedures for reset
  8.8 Procedures for interrupt
  8.9 Procedures for editing
  8.10 Fault conditions
  8.11 Called DTE reselection
9 Interoperability
  9.1 Addressing
  9.2 Procedures
  9.3 Cause and diagnostic fields
  9.4 Facilities
Annex A (informative): Comments on figures 3 and 4
Annex B (informative): Summary of requirements
Annex C (informative): 8-bit start-stop mode DTE access to the PAD
Annex D (informative): PSTN numbers for X.28 access to a PSPDN
Annex E (informative): CCITT Recommendation X.3 PAD parameters
History

Abstract

Provides a minimum set of access requirements for the PSPDN X.28/indirect access through PSTN in order to ensure equivalent offerings and full interconnectivity between the different networks within the European Community.

General Product Information

Published
Document Type	Standard
Status	Current
Publisher	European Telecommunications Standards Institute
Pages
ISBN
Committee	TE 5