ITU-T G 731 SPANISH-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、UNIN INTERNACIONAL DE TELECOMUNICACIONESUIT-T G.731SECTOR DE NORMALIZACINDE LAS TELECOMUNICACIONESDE LA UITASPECTOS GENERALES DE LOS SISTEMASDE TRANSMISIN DIGITALEQUIPOS TERMINALESEQUIPO MLTIPLEX MIC PRIMARIOPARA FRECUENCIAS VOCALESRecomendacin UIT-T G.731(Extracto del Libro Azul)NOTAS1 La Recomenda

2、cin UIT-T G.731 se public en el fascculo III.4 del Libro Azul. Este fichero es un extracto delLibro Azul. Aunque la presentacin y disposicin del texto son ligeramente diferentes de la versin del Libro Azul, elcontenido del fichero es idntico a la citada versin y los derechos de autor siguen siendo l

3、os mismos (Vase acontinuacin).2 Por razones de concisin, el trmino Administracin se utiliza en la presente Recomendacin para designar auna administracin de telecomunicaciones y a una empresa de explotacin reconocida. UIT 1988, 1993Reservados todos los derechos. No podr reproducirse o utilizarse la p

4、resente Recomendacin ni parte de la misma decualquier forma ni por cualquier procedimiento, electrnico o mecnico, comprendidas la fotocopia y la grabacin enmicropelcula, sin autorizacin escrita de la UIT.Fascculo III.4 - Rec. G.731 1Recomendacin G.731Fascculo III.4 - Rec. G.731EQUIPO MLTIPLEX MIC PR

5、IMARIO PARA FRECUENCIAS VOCALES(Ginebra, 1972; modificada posteriormente)El CCITT,considerandoque los sistemas de modulacin por impulsos codificados (MIC) ya se utilizan en distintos pases,particularmente para la obtencin de un gran nmero de circuitos telefnicos de corta distancia en algunos pares de loscables existentes, y a fin de reducir al mnimo el nmero de sistemas MIC diferentes que pueden utilizarse en lasconexiones internacionales,recomiendaque las Administraciones interesadas elijan uno de los dos mltiplex MIC primarios descritos en lasRecomendaciones G.732 y G.733.

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