ITU-T G 422 FRENCH-1993 INTERCONNECTION AT AUDIO-FREQUENCIES《音频互联》.pdf

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1、UNION INTERNATIONALE DES TLCOMMUNICATIONS5)4 4 G.422SECTEUR DE LA NORMALISATIONDES TLCOMMUNICATIONSDE LUIT3934 -%3 ).4%2.!4)/.!58 !.!,/)15%3#/52!.43 0/24%523#!2!#4 2)34)15%3 . 2!,%3 $%3 3934 -%34 , 0(/.)15%3 ).4%2.!4)/.!58 3522) des caractristiques des quipements terminaux de multiplexage, sil y a l

2、ieu (voir lesRecommandations G.232 et G.412);3) de la mthode de signalisation sur les circuits internationaux (les Recommandations pertinentes figurent dansle tome VI); voir aussi la remarque suivante.Remarque Etant donn que les Recommandations du CCITT mentionnes lalina 2) envisagent lutilisationde

3、 frquences vocales de signalisation bien dfinies, transmises sur la voie de conversation, aucun problme de rptitionde la signalisation ne devrait en principe se poser.Dans les cas o lon utilise des mthodes de signalisation diffrentes sur un systme en cble et un systme surfaisceau hertzien, il sera ncessaire dinsrer aux points dinterconnexion un quipement ramenant les deux types designalisation la mme forme, de prfrence en courant continu.Rfrence1 Recommandation du CCIR Interconnexion aux audiofrquences des faisceaux hertziens de tlphonie, Vol. IX,Rec. 268, Dubrovnik, 1986.

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