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    • 2. 发明授权
    • Elastic store memory circuit
    • 弹性存储器电路
    • US5444658A
    • 1995-08-22
    • US206221
    • 1994-03-07
    • Naoyuki IzawaYasuhiro AsoYoshihiro UchidaSatoshi Kakuma
    • Naoyuki IzawaYasuhiro AsoYoshihiro UchidaSatoshi Kakuma
    • H04J3/06H04L7/00G11C7/00
    • H04J3/0626
    • An elastic store memory circuit includes first and second elastic store memories. Each of the first and second elastic store memories generates a phase comparison signal when a phase difference between a write timing and a read timing is within a predetermined phase range. The elastic store memory circuit also includes a selector which selects either the input data read out from the first elastic store memory or the input data read out from the second elastic store memory, and a slip signal generator for generating a slip signal on the basis of a write reset timing at which the first and second elastic store memories are reset, a read reset timing at which the first and second elastic store memories are reset, and the phase comparison signal. The slip signal indicates which one of the write reset timing and the read reset timing precedes the other one.
    • 弹性存储存储器电路包括第一和第二弹性存储器存储器。 当写入定时和读取定时之间的相位差在预定相位范围内时,第一和第二弹性存储存储器中的每一个产生相位比较信号。 弹性存储器电路还包括选择器,其选择从第一弹性存储存储器读出的输入数据或从第二弹性存储器读出的输入数据,以及滑移信号发生器,用于基于 复位第一和第二弹性存储器的写入复位定时,复位第一和第二弹性存储器的读取复位定时以及相位比较信号。 打印信号指示写入复位定时和读取复位定时中哪一个先于另一个。
    • 4. 发明授权
    • Apparatus for testing ATM channels
    • ATM通道测试装置
    • US5313453A
    • 1994-05-17
    • US854888
    • 1992-03-20
    • Yoshihiro UchidaSatoshi KakumaNaoyuki IzawaYasuhiro AsoShuji YoshimuraMasami Murayama
    • Yoshihiro UchidaSatoshi KakumaNaoyuki IzawaYasuhiro AsoShuji YoshimuraMasami Murayama
    • H04L1/00H04L12/26H04L12/56H04Q11/04H04J3/14
    • H04L12/5601H04L1/0083H04L12/2697H04L43/50H04L49/1553H04L49/255H04L49/309H04Q11/0478H04J2203/0019H04L2012/5628H04L2012/5672H04L2012/5681
    • A first form of an ATM channel testing apparatus tests an ATM channel by having a test cell detector in each switch to detect whether or not the switch appropriately switches a test cell generated by a test cell generating trunk. A second form of an ATM channel testing apparatus easily tests an ATM channel by having test cell generators provided for the respective input highways sequentially generating test cells including test cell identifying information and input highway identifying information, and having test cell checkers provided respectively for the output highways simply tally the test cells by the respective input highways. A third form of an ATM channel testing apparatus tests an ATM channel with less pieces of hardware by having turnaround parts in respective ordinary trunks sequentially turn around a test cell generated by a test cell generating trunk to be finally returned to the test cell generating trunk. A fourth form of an ATM channel testing apparatus tests an ATM channel by having a test cell checker provided for each of output highways to examine whether or not the test data carried in respective octets of the payloads in extracted test cells are of consecutive values.
    • ATM信道测试装置的第一形式通过在每个交换机中具有测试小区检测器来检测ATM信道,以检测交换机是否适当地切换由测试小区产生的中继线产生的测试小区。 ATM信道测试装置的第二种形式通过为相应的输入高速公路提供测试单元发生器来容易地测试ATM信道,该测试单元发生器依次产生包括测试单元识别信息和输入公路识别信息的测试单元,并且具有分别为输出提供的测试单元检查器 高速公路通过相应的输入高速公路简单地测试单元格。 ATM信道测试装置的第三种形式通过在相应的普通中继线中具有周转部分来顺序地转换由测试小区生成中继线产生的测试小区,以最终返回到测试小区生成中继线,来测试具有较少硬件的ATM信道。 ATM信道测试装置的第四种形式通过为每个输出高速公路提供测试单元检查来检测ATM信道,以检查提取的测试小区中有效载荷的相应八位字节中承载的测试数据是否是连续值。
    • 7. 发明授权
    • Telephone subscriber accomodation system in a broadband network
    • 宽带网络中的电话用户住宿系统
    • US5521924A
    • 1996-05-28
    • US384224
    • 1995-02-06
    • Satoshi KakumaShuji YoshimuraNaoyuki Izawa
    • Satoshi KakumaShuji YoshimuraNaoyuki Izawa
    • H04L29/06H04L12/66H04L12/951H04M3/00H04Q11/04H04J3/24
    • H04Q11/0478H04L2012/5614H04L2012/5672
    • On receiving voice data from a subscriber accommodated in a broadband network, a terminal adaptor separately puts the voice data in cells in 8-bit units every 125 .mu.s separately, and transmits the cells by a remote switching unit in the broadband network to subscriber terminal equipment. The subscriber terminal equipment accommodates and processes each item of 8-bit data in 24 channels in the PCM format, puts in cells the PCM-formatted data in 24 channels, and sends the cells sequentially to a broadband network transmission line through the remote switching unit. On receiving the above described data in cells, an adaptor provided between the broadband network and an existing telephone network converts the data to the PCM transmission format, and sends them to the existing telephone network after adding a signaling bit to them.
    • 在从宽带网络中收到的用户接收语音数据的情况下,终端适配器分别将每个125μs的8位单元中的话音数据单独放置,并将宽带网络中的远程交换单元的小区发送给用户终端 设备。 用户终端设备以PCM格式适应和处理24个信道中的每个8位数据项,将PCM格式的数据单元格放入24个信道中,并通过远程交换单元将单元顺序发送到宽带网络传输线 。 在单元中接收上述数据之后,在宽带网络和现有电话网络之间提供的适配器将数据转换为PCM传输格式,并在向它们添加信令位之后将其发送到现有的电话网络。
    • 8. 发明授权
    • Transmission test system in a broadband ISDN
    • 宽带ISDN中的传输测试系统
    • US5251204A
    • 1993-10-05
    • US762338
    • 1991-09-19
    • Naoyuki IzawaShuji YoshimuraSatoshi Kakuma
    • Naoyuki IzawaShuji YoshimuraSatoshi Kakuma
    • H04J3/14H04J3/16H04L12/70H04Q11/04
    • H04Q11/0478H04J3/14H04J3/1617H04J2203/0089H04L2012/5628H04L2012/5672
    • The present invention relates to a transmission line test method in the broadband ISDN for assembling an ATM formatted cell into a frame and sending it in the synchronous optical network (SONET) formatted transmission line as a protocol of an optical fiber communication network. First, test data are inserted into an ATM cell according to a command of the central controlling unit in an ATM switching unit. Then, the test cell is sent through an ATM switch in the ATM switching unit after the insertion of the test data; the test data are extracted from the test cell turned around by an ATM layer provided between the ATM switch and the SONET-formatted transmission line or by a subscriber terminal adapter, or from the test frame (including the test cell) turned around by a terminator in the SONET-formatted transmission line or by a network terminator at a subscriber terminal in the transmission line; and finally a transmission test is conducted by checking the data in the line up to each turnaround point.
    • 本发明涉及宽带ISDN中用于将ATM格式化小区组装成帧并在作为光纤通信网络的协议的同步光网络(SONET)格式化传输线路中发送它的传输线路测试方法。 首先,根据ATM交换单元中的中央控制单元的命令将测试数据插入到ATM信元中。 然后,测试单元在插入测试数据之后通过ATM交换单元中的ATM交换机发送; 从由ATM交换机和SONET格式的传输线之间提供的ATM层或由用户终端适配器或由终端器转过的测试框(包括测试单元)转移的测试单元提取测试数据 在SONET格式的传输线路中,或者由传输线路中的用户终端的网络终端器; 最后通过检查直到每个周转点的行中的数据进行传输测试。
    • 10. 发明授权
    • System and method for monitoring errors occurring in data processed by a
duplexed communication apparatus
    • 用于监视由双工通信装置处理的数据中发生的错误的系统和方法
    • US5784274A
    • 1998-07-21
    • US609918
    • 1996-02-29
    • Masami MurayamaNaoyuki Izawa
    • Masami MurayamaNaoyuki Izawa
    • H04L12/24H04L12/26G05B15/00
    • H04L41/06H04L43/0847H04L43/16
    • A performance monitor system monitors a number of errors occurring in data processed in a communication apparatus having a duplex configuration formed of two systems. The performance monitor system includes a first unit for monitoring a number of errors occurring in data processed in one of the two systems a second unit for monitoring a number of errors occurring in data processed in another one of the two systems and a control unit for controlling operations of the first and second units. Each of the first and second units has a first counter outputting a first error count value and a second counter outputting a second error count value. The control unit controls the first and second counters so that the sum of the first and second error count values obtained in the first unit is equal to sum of those obtained in the second unit.
    • 性能监视器系统监视在具有由两个系统形成的双工配置的通信设备中处理的数据中发生的许多错误。 性能监视器系统包括用于监视在两个系统之一处理的数据中发生的数量错误的第一单元,用于监视在两个系统中的另一个系统中处理的数据中出现的错误数量的第二单元和用于控制 第一单元和第二单元的操作。 第一和第二单元中的每一个具有输出第一错误计数值的第一计数器和输出第二错误计数值的第二计数器。 控制单元控制第一和第二计数器,使得在第一单元中获得的第一和第二误差计数值的和等于在第二单元中获得的和的和。