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