ITU-T Q 724 NOTE SPANISH-2001 Telephone user part signalling procedures《电话用户部分信令规程》.pdf

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1、Union internationale des tlcommunicationsPlace des Nations 1211 GENVE 20 Suisse Switzerland SuizaHOJAS DE CONTROL SECRETARA GENERAL DE LA UNIN INTERNACIONAL DE TELECOMUNICACIONESAsunto: UIT-T Q.724 Enmienda 1 (03/93)Ginebra, 5 de noviembre de 2001SECTOR DE NORMALIZACINDE LAS TELECOMUNICACIONESDE LA

2、UITRecomendacin UIT-T Q.724 (1988)Procedimientos de sealizacin de la parte usuario de telefonai) En 1.4/Q.724sustityase: “Cuando se recibe un mensaje inicial de direccin . ii) cuando se reciben peticionesde prueba de continuidad“por: “Cuando se recibe un mensaje inicial de direccin con una peticin d

3、e prueba decontinuidad, se conecta un bucle de prueba de continuidad.“ii) En la figura 8/Q.724, hoja 2: suprmase la salida: “Parar T11“ despus de la expiracin de T13.iii) Al final de 1.15.1 c): adase el siguiente texto:“Desde el punto de vista de estos procedimientos, se considera que los circuitos

4、servidos por laparte usuario de telefona son siempre bidireccionales. Si un circuito se utiliza slounidireccionalmente, es a los efectos del control del trfico y no influye en el funcionamiento delprotocolo.“iv) En 7.2.3, adase la siguiente nota:“Para evitar dificultades en enlaces de transmisin digital, la frecuencia del equipo no debesintonizarse a 2000 Hz.“

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