Table of Contents

Foreword
Introduction
1 Scope
2 Normative references
3 Abbreviations
4 Electrical characteristics
  4.1 Point of connection in the telephone set
  4.2 Electrical characteristics at interconnection
      point
  4.3 Safety
5 Interconnection with the telephone set
6 Test procedures
  6.1 Setting the reference drive level
  6.2 Determining the electrical impedance at the
      interconnection point
  6.3 Measurement of the sensitivity
  6.4 Determining the frequency characteristic
  6.5 Determining the maximum output level
  6.6 Determining the electrical noise level
  6.7 Checking the input/output linearity
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): Rationale for electrical output
         sensitivity chosen
Annex C (informative): Coupling to the hearing aid
  C.1 Connector position
  C.2 Interconnecting lead
Annex D (informative): Bibliography
History

Abstract

Describes the electrical characteristics for the electrical coupling of the telephony function implemented in Terminal Equipment (TE) to hearing aids.

General Product Information

Published
Document Type	Standard
Status	Current
Publisher	European Telecommunications Standards Institute
Pages
ISBN
Committee	TE 4
Supersedes	PRETS 300 679 : SEP 95