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
  5.3 Line signals
  5.4 Channel allocation
  5.5 Response times
  5.6 Threshold of the received line signal detector
  5.7 Provision of auto-calling and/or answering
      facilities (hand-shaking facilities)
  5.8 Provision of test looping facilities
  5.9 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 5.4 (channel allocation)
  A.4 Compliance with subclause 5.5 (response times)
  A.5 Test for subclause 5.6 (Threshold of received
      line signal detector)
  A.6 Test for subclause 5.9.1 (Distortion)
Annex B (informative): 300 bits per second modem based
                       on CCITT Recommendation V.21
History

Abstract

Specifies the technical characteristics to be offered by modems seeking Category II approval for duplex operation over the PSTN at 300 bits per second. Specifies two modes of operation: call mode and answer mode.

General Product Information

Published
Document Type	Standard
Status	Current
Publisher	European Telecommunications Standards Institute
Pages
ISBN
Committee	TE 5
Supersedes	PRETS 300 115 : JAN 97