Table of Contents

Foreword
Introduction
1 Scope
2 Normative references
3 Definitions and abbreviations
  3.1 Definitions
  3.2 Abbreviations
4 Sending characteristics
  4.1 General
  4.2 Sensitivity frequency response
  4.3 Sending Loudness Rating
5 Receiving characteristics
  5.1 General
  5.2 Sensitivity frequency response
  5.3 Receiving Loudness Rating
  5.4 Restoring normal receive amplification
6 Other characteristics
  6.1 Sidetone
  6.2 Stability
  6.3 Echo path loss
  6.4 Distortion
  6.5 Noise
  6.6 Acoustic shock
7 Testing methods
  7.1 Analogue telephones
  7.2 Digital telephones
  7.3 Summary of test methods
Annex A (normative): Packaging, labelling and user
        instructions
  A.1 Packaging and labelling
  A.2 User instructions
  A.3 Product suppliers information
Annex B (informative): Bibliography
History

Abstract

Defines extra audio amplification and related characteristics of telephony terminals in order to meet needs of hard-of hearing people.

General Product Information

Published
Document Type	Standard
Status	Current
Publisher	European Telecommunications Standards Institute
Pages
ISBN
Committee	TE 4