ITU-T G 411 SPANISH-1993 USE OF RADIO - RELAY SYSTEMS FOR INTERNATIONAL TELEPHONE CIRCUITS《国际电话电路中无线电中继系统的应用》.pdf

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1、UNIN INTERNACIONAL DE TELECOMUNICACIONESUIT-T G.411SECTOR DE NORMALIZACINDE LAS TELECOMUNICACIONESDE LA UITSISTEMAS INTERNACIONALES ANALGICOSDE PORTADORASCARACTERSTICAS GENERALES DE LOSSISTEMAS TELEFNICOS INTERNACIONALESEN RADIOENLACES O POR SATLITE EINTERCONEXIN CON LOS SISTEMASEN LNEAS METLICASEMP

2、LEO DE RADIOENLACES PARA OBTENERCIRCUITOS TELEFNICOS INTERNACIONALESRecomendacin UIT-T G.411(Extracto del Libro Azul)NOTAS1 La Recomendacin UIT-T G.411 se public en el fascculo III.2 del Libro Azul. Este fichero es un extracto delLibro Azul. Aunque la presentacin y disposicin del texto son ligeramen

3、te diferentes de la versin del Libro Azul, elcontenido del fichero es idntico a la citada versin y los derechos de autor siguen siendo los mismos (Vase acontinuacin).2 Por razones de concisin, el trmino Administracin se utiliza en la presente Recomendacin para designar auna administracin de telecomu

4、nicaciones y a una empresa de explotacin reconocida. UIT 1988, 1993Reservados todos los derechos. No podr reproducirse o utilizarse la presente Recomendacin ni parte de la misma decualquier forma ni por cualquier procedimiento, electrnico o mecnico, comprendidas la fotocopia y la grabacin enmicropel

5、cula, sin autorizacin escrita de la UIT.Fascculo III.2 - Rec. G.411 1Recomendacin G.411Fascculo III.2 - Rec. G.411EMPLEO DE RADIOENLACES PARA OBTENER CIRCUITOSTELEFNICOS INTERNACIONALESEl CCITTrecomienda por unanimidad1)que, siempre que sea posible, las comunicaciones telefnicas entre puntos fijos s

6、e realicen por lneas metlicas oenlaces radioelctricos que empleen frecuencias superiores a 30 MHz, con el fin de hacer menos difcil el problema de laasignacin de frecuencias radioelctricas, y que cuando pueda hacerse as, se fijen como objetivo las calidades detransmisin recomendadas por el CCITT para los circuitos metlicos internacionales de telefona.Referencias1 Recomendacin del CCIR Enlaces radiotelefnicos en los circuitos telefnicos internacionales, Vol. III,Rec. 335, Dubrovnik, 1986.1)Recomendacin idntica a un pasaje de la Recomendacin 335 del CCIR 1.

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