ITU-T I 421 SPANISH-1988 PRIMARY RATE USER-NETWORK INTERFACE《一次群速率用户 网络接口》.pdf

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1、UNIN INTERNACIONAL DE TELECOMUNICACIONESUIT-T I.421SECTOR DE NORMALIZACINDE LAS TELECOMUNICACIONESDE LA UITRED DIGITAL DE SERVICIOS INTEGRADOS (RDSI)INTERFACES USUARIO-RED DE LA RDSIINTERFAZ USUARIO-RED A VELOCIDADPRIMARIARecomendacin UIT-T I.421(Extracto del Libro Azul)NOTAS1 La Recomendacin UIT-T

2、I.421 se public en el fascculo III.8 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 los mismos

3、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 presente Re

4、comendacin 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.8 - Rec. I.421 1Recomendacin I.421Fascculo III.8 - Rec. I.421INTERFAZ USUARIO-RED A VELOCIDAD PRIMARIA(Mlaga-Torremolinos, 1984)Las estructuras de interfaz usuario-red a velocidad primaria se definen en la Recomendacin I.412. En lasRecomendaciones I.431 (capa 1), I.440 e 441 (capa 2), I.450, I.451 e I.452 (capa 3) figuran las especificacionesdetalladas.

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