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ITU J.12:1988

ITU J.12:1988 Types Of Sound-programme Circuits Established Over The International Telephone Network

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Table of Contents

115kHz-typesound-programmecircuit
210kHz-typesound-programmecircuit
3Narrowbandwidthsound-programmecircuit
(7and5kHz-typesound-programmecircuit)
4Useorordinarytelephonecircuits
References

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