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IEEE 269

Methods for Measuring Transmission Performance of Telephone Sets

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Organization: IEEE
Publication Date: 1 May 1966
Status: inactive
Page Count: 24
scope:

SCOPE AND PURPOSE

The purpose of this Standard is to describe a practical and reproducible method for measuring the transmission characteristics of a telephone set, and the components thereof, by means of objective measurements in a test connection. Performance characteristics obtained using this method will approximate but will not duplicate performance under actual use conditions.

The method requires a suitable Artificial Mouth. It also specifies a standard Artificial Ear, standard circuits comprising direct-current power feed and connecting loops, and a standard pressure microphone.

This Standard is intended for use in measuring the transmission characteristic over the frequency range most useful for speech, e.g. 150 to 5000 hertz. It is to be used for single-frequency measurements and for measurements with continuously varying frequencies such as slow sweeps and warble bands.

It is suitable also for measuring the transmission performance of conventional telephone sets equipped with handsets using carbon transmitters and used with 2-wire circuits. It is not intended to be applicable to special devices such as noise-exclusion transmitters, distant-talking transmitters, insert-type receivers, or noise-exclusion receivers equipped with large ear pads.

This Standard is basd on a standard pressure microphone to measure the sound field produced by the Artificial Mouth and to measure the pressure developed in the Artificial Ear.

Drawings and test procedures as well as other pertinent information have been included as an aid to designers in setting up the tests.

Document History

November 7, 2019
Standard for Measuring Electroacoustic Performance of Communication Devices
This standard provides techniques for objective measurement of electroacoustic devices used for speech communications, including communication devices also used for multimedia applications....
March 29, 2012
Methods for Measuring Transmission Performance of Analog and Digital Telephone Sets, Handsets, and Headsets Amendment 1
Practical methods for making laboratory measurements of electroacoustic characteristics of analog and digital telephones, handsets, and headsets are presented. The methods may also be applicable to a...
March 25, 2010
Methods for Measuring Transmission Performance of Analog and Digital Telephone Sets, Handsets, and Headsets
This standard provides the techniques for objective measurement of electroacoustic characteristics of analog and digital telephones, handsets and headsets. Application is in the frequency range from...
March 6, 2007
Standard for Methods for Measuring Transmission Performance of Analog and Digital Telephone Sets, Handsets, and Headsets Amendment 1
This standard provides the techniques for objective measurement of electroacoustic characteristics of analog and digital telephones, handsets, and headsets. Application is in the frequency range...
November 8, 2002
Standard Methods for Measuring Transmission Performance of Analog and Digital Telephone Sets, Handsets, and Headsets
This standard provides the techniques for objective measurement of electroacoustic characteristics of analog and digital telephones, handsets, and headsets. Application is in the frequency range...
January 1, 1992
Standard Methods for Measuring Transmission Performance of Analog and Digital Telephone Sets
A description is not available for this item.
December 7, 1983
STANDARD METHOD FOR MEASURING TRANSMISSION PERFORMANCE OF TELEPHONE SETS
A description is not available for this item.
January 1, 1971
Methods for Measuring Transmission Performance of Telephone Sets
Scope and PurposeĀ  The purpose of this standard is to describe a practical method for measuring the transmission characteristics of a telephone set by means of objective measurements in a test...
IEEE 269
May 1, 1966
Methods for Measuring Transmission Performance of Telephone Sets
SCOPE AND PURPOSE The purpose of this Standard is to describe a practical and reproducible method for measuring the transmission characteristics of a telephone set, and the components thereof, by...
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