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1.发明授权
公开(公告)号：US5373537A
公开(公告)日：1994-12-13
申请号：US936629
申请日：1992-08-28
CPC分类号： H03L7/143 , H03L7/07 , H03L7/08 , H03L7/0807 , H04J3/0688 , H04L7/042 , H04L7/0083 , H04L7/048
摘要： Method and apparatus for synchronizing a clock of a telecommunication switching system. The clock of the telecommunication switching system is supplied, at least at times, with reference clock signals from a plurality of external reference clock sources. Every external reference clock source has a predetermined priority allocated to it. The supplied reference clock signals are checked for clock errors to which individual errors are allocated. For synchronization, the clock accepts an external reference clock signal dependent on the priorities allocated to the reference clock sources and dependent on the clock-error-associated error values. In an initialization, initial error values are allocated to the reference clock sources. In a re-initialization of the system, the synchronization procedure is continued from the current error values that are present at the time of the system outage.
摘要翻译： 用于同步电信交换系统的时钟的方法和装置。 电信交换系统的时钟至少有时由来自多个外部参考时钟源的参考时钟信号提供。 每个外部参考时钟源具有分配给它的预定优先级。 检查提供的参考时钟信号以分配单个错误的时钟错误。 为了同步，时钟接收外部参考时钟信号，取决于分配给参考时钟源的优先级，并取决于时钟错误相关的错误值。 在初始化中，将初始错误值分配给参考时钟源。 在系统的重新初始化中，从系统中断时出现的当前错误值继续同步过程。
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公开(公告)号：US4604876A
公开(公告)日：1986-08-12
申请号：US637975
申请日：1984-08-06
申请人： Reinhold Hoffmann
发明人： Reinhold Hoffmann
CPC分类号： A44C17/008 , B44F9/08
摘要： An imitation gem consisting of a semi shell of a transparent plastic material with concave inner and convex outer surfaces has light reflecting and light refracting facets formed on both its inner concave and outer convex surfaces. The open end of the semi shell is closed by a cover which is also provided with facets so as to further improve light reflection and refraction.
摘要翻译： 由具有凹内表面和外凸面的透明塑料材料的半壳体组成的仿宝石具有形成在其内凹面和外凸面之间的光反射和光折射面。 半壳的开口端由还具有小平面的盖封闭，以进一步改善光反射和折射。
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