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    • 2. 发明专利
    • SYSTEM SWITCHING METHOD
    • JPS56122540A
    • 1981-09-26
    • JP2642380
    • 1980-03-03
    • FUJITSU LTDNIPPON TELEGRAPH & TELEPHONEOKI ELECTRIC IND CO LTDNIPPON ELECTRIC COHITACHI LTD
    • NAKAMURA YOSHIHIROKIKUCHI AKIRAHANDA TOORUASAKURA JIYUNJIENAMI SHIROU
    • H04B1/74H04L1/22
    • PURPOSE:To prevent an operation error for switching, by sending out the same system switching information by the specified same time slot of plural transmission lines provided between the master station and the slave station, and also increasing the number of times of continuous detection of the information in case when the information is transmitted by one transmission line due to a fault of the transmission line. CONSTITUTION:The master station and the slave station are connected by plural transmission lines L1, L2, the same system switching information is sent out to the slave station from the master station by the specified same time slot of the transmission lines L1, L2, it is received by the system switching information receiving part of the slave station, and the switching control of system is executed. The switching information of each transmission line L1, L2 is collated by the collating means of the AND circuit 13, the NOR circuit 16, etc. of said information receiving part, and the number of times of the continuous collating coincidence is detected by the shift register 18, 19 and the AND circuits 20-25, etc. And, in case when a fault detection signal has been obtained, the system switching information of the fauty transmission line is disregarded, and when the system switching information of the normal transmission line has been detected continuously by the number of times exceeding the number of times of the continuous collating coincidence, it is decided as effective, and a system switching signal SC is output from the J-KFF28.
    • 6. 发明专利
    • Time division sine concentration system
    • 时间分辨率浓度系统
    • JPS5775095A
    • 1982-05-11
    • JP15070780
    • 1980-10-29
    • Fujitsu LtdHitachi LtdNec CorpNippon Telegr & Teleph Corp Oki Electric Ind Co Ltd
    • ENAMI SHIROUKOGURE KOUJIJIN YOSHIHIROOGUCHI SEISHIROUNAKAMURA YOSHIHIRO
    • H04Q3/60H04Q11/04
    • H04Q11/04
    • PURPOSE:To enhance the use efficiency of highways to reduce the number of highways, by connecting each subscriber to plural highways as complete group to concentrate lines. CONSTITUTION:The voice signal from a subscriber 1 is encoded to a digital code by a codec 2 and is inputted to a multiplexer 6. A control device controls the multiplexer 6 for every time slot and connects the output of the codec 2 to a high way 3 or 3'. Thus, since the control devie processes time slots on two highways as one group, the use efficiency of highways is enhanced in comparison with the case where the number of highways, to which each subscriber can be connected, is fixed to one, and the communication of a certain subscriber is prevented from being broken completely even in case of a highway fault.
    • 目的:提高高速公路的使用效率,减少高速公路数量,将各用户连接到多条高速公路作为集中线路。 构成:来自用户1的语音信号由编解码器2编码为数字代码,并被输入到多路复用器6.控制装置对每个时隙控制复用器6,并将编解码器2的输出连接到高速 3或3'。 因此,由于控制设备处理两个高速公路上的时隙为一个组,因此与每个用户可以连接的高速公路数固定为1的情况相比,提高了高速公路的使用效率,并且通信 即使在公路故障的情况下也防止了某个用户的完全断开。