Devices for speech reception and transmission. Methods of measuring acoustic noises
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Facsimile devices. Reliability test methods
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Channels of data transmission. Methods of measuring parameters
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Apparatus telegraph start-stop, 5-element code. Methods of electric parameters measuring
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Printing teletypes for 5-elements code. Reliability test methods
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5-element code start-stop page printing apparatus. Test methods
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Telephones. Methods of measuring electroacoustic parameters
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Telephone sets. Voice-frequency method of speech intelligibility measurement
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Speech transmission over varies communication channels. Techniques for measurements of speech quality, intelligibility and voice identification
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Low biterate speech transmission systems. Speech quality characteristics and their evaluation
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Low-current relays. Methods for testing storageability.
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Communication radio-electronic land equipment. Methods of the accelerated tests for non-failure operation.
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