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    • 5. 发明授权
    • Transmission unit and two-way signal conversion method
    • 传输单元和双向信号转换方法
    • US06870877B2
    • 2005-03-22
    • US09752350
    • 2000-12-29
    • Morihito Notani
    • Morihito Notani
    • H04J3/00H04J3/16H04L29/06H04Q11/04H04B1/38H04L5/16
    • H04J3/1611H04J2203/0051H04J2203/0089
    • A transmission unit which transports digital signals between different network systems, effectively converting the signals to resolve their differences in the specifications. A first signal interface transmits and receives first network signals. A second signal interface transmits and receives second network signals. A downward converter produces lower-level signals by converting received first and second network signals to a lower hierarchical level at which the first and second network systems are compatible with each other in terms of logical signal structure. An upward converter produces a higher-level signal by converting each given lower-level signal to an upper hierarchical level which complies with the first or second network system. A loopback unit provides loopback paths to route the lower-level signals from the downward converter to the upward converter, so that the first and second network signal will be converted in both directions.
    • 在不同网络系统之间传输数字信号的传输单元,有效地转换信号以解决它们在规格上的差异。 第一信号接口发送和接收第一网络信号。 第二信号接口发送和接收第二网络信号。 向下转换器通过将接收到的第一和第二网络信号转换到较低层级,产生较低级别的信号,在较低层级下,第一和第二网络系统在逻辑信号结构方面彼此兼容。 向上转换器通过将每个给定的较低级别信号转换成符合第一或第二网络系统的上层次级别来产生更高级别的信号。 环回单元提供环回路径以将下层信号从下行转换器路由到上转换器,使得第一和第二网络信号将在两个方向上被转换。