Table of Contents

Foreword
1 Scope
2 Normative references
3 Definitions and abbreviations
  3.1 Definitions
  3.2 Abbreviations
4 General requirements
  4.1 References to other ETSs
  4.2 Information to be provided by the applicant
5 Functional requirements specific to Category II
  modems
  5.1 General requirements
  5.2 Modes of operation/use
  5.3 Line signals
  5.4 Line signalling rates
  5.5 Channel allocation
  5.6 Response times
  5.7 Synchronous mode of use
  5.8 Thresholds of received line signal detectors
  5.9 Auto-calling and auto-answering procedures
  5.10 Provision of test looping facilities
  5.11 Performance
Annex A (normative): Testing methods
  A.1 General testing conditions
  A.2 Test for subclause 5.3.1 (Carrier frequencies)
  A.3 Test for subclause 5.5 (Channel allocation)
  A.4 Test for subclause 5.6 (Response times)
  A.5 Test for subclause 5.7 (Synchronous mode of use)
  A.6 Test for subclause 5.11.1 (Distortion)
Annex B (informative): Proforma declaration of modes
                       of operation/use
Annex C (informative): Bibliography
History

Abstract

Specifies the technical characteristics to be met by a modem seeking Category II approval for: asymmetrical duplex operation over the PSTN at 1200/75 bits per second; and/or half duplex operation over the PTSN at 1200 bits per second. Specifies four modes of operation/use.

General Product Information

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