ITU-T G 731 FRENCH-1993 PRIMARY PCM MULTIPLEX EQUIPMENT FOR VOICE FREQUENCIES《音频的原始脉冲编码调制》.pdf

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1、UNION INTERNATIONALE DES TLCOMMUNICATIONS5)4 4 G.731SECTEUR DE LA NORMALISATIONDES TLCOMMUNICATIONSDE LUIT!30%#43 . 2!58 $%3 3934 -%3$% 42!.3-)33)/. .5- 2)15%315)0%-%.43 4%2-).!5815)0%-%.4 $% -5,4)0,%8!% -)#02)-!)2% 0/52 modifie par la suite)Le CCITT,considrantque des systmes modulation par impulsio

2、ns et codage (MIC) sont dj employs dans divers pays, enparticulier pour procurer un grand nombre de circuits tlphoniques petite distance sur certaines paires dans descbles existants, et afin de diminuer le nombre de systmes MIC diffrents procurant des circuits utilisables dans descommunications internationales,recommandeque les Administrations intresses choisissent entre les deux quipements de multiplexage MIC primairesdcrits dans les Recommandations G.732 et G.733.

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