Operation and maintenance of clock distribution networks...

Details Operation and maintenance of clock distribution networks... Operation and maintenance of clock distribution networks...

G - Physics

04

G

G04G 3/02 (2006.01) G06F 1/04 (2006.01) H04J 3/06 (2006.01) H04L 7/00 (2006.01) H04Q 11/04 (2006.01)

Patent

CA 2233069

In a network, such as a large telecommunication switch, intended for the processing of information in different stations and for transmitting information between the stations, circuits (1) are provided which generate independently composite clock signals (CLSY-A, CLSY-B, CLSY-C) containing both a clocking rate (CLock) and a frame synchronizing rate (SYnch). These clock signals are transmitted on three different transmission lines in parallel and independently to a station (II), where some kind of information processing (4) is made in redundant planes (A, B, C). In the station (II) all incoming clock signals are fed to each one of three independently operating selector units (3) in which a choice of a clock signal is made for obtaining a clock signal to be used in the three redundant planes (A, B, C), arranged in parallel to each other and operating independently of each other, in the station.

Dans un réseau, comme un centre important de commutation de télécommunications, destiné au traitement de l'information dans différentes stations et à la transmission d'informations entre les stations, il y a des circuits (1) qui produisent de manière indépendante des signaux d'horloge composites (CLSY-A, CLSY-B, CLSY-C) comportant à la fois un rythme de synchronisation (CLock) et un rythme de synchronisation de trames (SYnch). Ces signaux d'horloge sont transmis, en parallèle et de manière indépendante, sur trois lignes de transmission différentes, à une station (II), où est effectué un traitement (4) de l'information d'une façon ou d'une autre, dans des plans redondants (A, B, C). Dans la station (II), tous les signaux d'horloge reçus sont amenés à chacune de trois unités sélectrices (3) fonctionnant de manière indépendante, dans lesquelles a lieu le choix d'un signal d'horloge pour obtenir un signal d'horloge devant être utilisé dans les trois plans redondants (A, B, C), disposés parallèlement les uns aux autres et fonctionnant indépendamment les uns des autres, dans la station.

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