Battery feed circuit for a pair of subscriber lines
    2.
    发明授权
    Battery feed circuit for a pair of subscriber lines 失效
    一对用户线路的电池供电电路

    公开(公告)号:US4677669A

    公开(公告)日:1987-06-30

    申请号:US737165

    申请日:1985-05-23

    IPC分类号: H04M19/06 H04M19/00

    CPC分类号: H04M19/005

    摘要: Battery feed circuit for a pair of subscriber lines includes a voltage drive circuit with an operational amplifier having a predetermined output impedance determined by an alternating current terminal impedance for the pair of subscriber lines. Both voice signals and induced noise signals are terminated by the voltage drive circuit. The voltage drive circuit is connected in parallel with an electronic inductance circuit, between one of the subscriber lines and ground or a direct current voltage supply.

    摘要翻译: 用于一对用户线路的电池馈电电路包括具有由用于该用户线的交流端子阻抗确定的预定输出阻抗的运算放大器的电压驱动电路。 语音信号和感应噪声信号均由电压驱动电路终止。 电压驱动电路与电子电感电路并联连接,其中一个用户线路与接地线之间或直流电压源。

    Hybrid exchange, an exchange, and a re-arrangement method for STM data in an exchange
    3.
    发明授权
    Hybrid exchange, an exchange, and a re-arrangement method for STM data in an exchange 失效
    交换中的STM数据的混合交换,交换和重新排列方法

    公开(公告)号:US06560219B1

    公开(公告)日:2003-05-06

    申请号:US08951883

    申请日:1997-10-16

    IPC分类号: H04L1264

    摘要: A hybrid exchange which exchanges the STM data to be transmitted periodically to realize an exchange in unit of the ATM data to be transmitted asynchronously includes asynchronous transmission terminal interface as the interface with an STM terminal, an synchronous transmission terminal interface as the interface with an ATM terminal, an ATM exchange interface as the interface with an ATM exchange, a transmitting unit for transmitting the STM time slot and ATM time slot, and a control unit for controlling the interfaces. The synchronous transmission terminal interface assigns the STM data to be transmitted periodically to the STM time slot, while the asynchronous transmission terminal interface assigns the ATM data to be transmitted asynchronously to the ATM time slot. The STM time slot and ATM time slot are identified by the STM/ATM identifier. The STM time slot is stored by multiplexing a plurality of STM data.

    摘要翻译: 交换周期性发送的STM数据的混合交换机以实现异步发送的ATM数据的单元交换,包括作为与STM终端的接口的异步传输终端接口,作为与ATM的接口的同步传输终端接口 终端,作为与ATM交换机的接口的ATM交换接口,用于发送STM时隙和ATM时隙的发送单元,以及用于控制接口的控制单元。 同步传输终端接口将要周期性发送的STM数据分配给STM时隙,而异步传输终端接口分配要与ATM时隙异步发送的ATM数据。 STM时隙和ATM时隙由STM / ATM标识符标识。 通过复用多个STM数据来存储STM时隙。

    Identifier translation apparatus
    4.
    发明授权
    Identifier translation apparatus 失效
    标识符翻译设备

    公开(公告)号:US06046996A

    公开(公告)日:2000-04-04

    申请号:US713239

    申请日:1996-09-12

    摘要: An identifier translation apparatus is provided that does not require a prohibitively large memory capacity and that is simple in construction and capable of increasing the speed of processing. Using an address consisting of a VPI and the high-order 6 bits of a VCI, a first-stage table is read to retrieve a block number, and using an address consisting of the retrieved block number and the low-order 6 bits of the VCI, a second-stage table is read to retrieve a routing tag. The routing tag is then appended to a cell.

    摘要翻译: 提供了一种标识符转换装置,其不需要超大的存储容量,并且结构简单并且能够提高处理速度。 使用由VPI和VCI的高6位组成的地址,读取第一级表以检索块号,并使用由检索到的块号和低位6位组成的地址 VCI读取第二级表以检索路由标签。 然后将路由标签附加到单元。

    Circuit for providing digital data having high clarity in a digital
signal receiver
    5.
    发明授权
    Circuit for providing digital data having high clarity in a digital signal receiver 失效
    用于在数字信号接收机中提供高清晰度的数字数据的电路

    公开(公告)号:US5329538A

    公开(公告)日:1994-07-12

    申请号:US846939

    申请日:1992-03-06

    CPC分类号: G11B20/18 G06F11/00 G11B20/10

    摘要: In the present invention, input data are extracted by a clock and compared with the previous input data. A cyclic counter is provided for cyclically counting clock signals in each noise erasure time period (the maximum retaining time of a signal referred to as noise). When a change is detected in input data, the counter value is stored. When the input data indicate no changes, the counter value and the stored counter value are compared. If a non-coincident result is outputted, it indicates that the noise erasure time has not passed since the input data indicated a change. Therefore, the input data are not outputted. If a coincident result is outputted, it indicates that the cyclic counter counted one cycle. That is, the noise erasure time has passed. Therefore, the input data are outputted since the input data are not recognized as noise.

    摘要翻译: 在本发明中,通过时钟提取输入数据,并与先前的输入数据进行比较。 提供了循环计数器,用于在每个噪声消除时间段(被称为噪声的信号的最大保持时间)中周期性地计数时钟信号。 当在输入数据中检测到变化时,存储计数器值。 当输入数据表示没有变化时,比较计数器值和存储的计数器值。 如果输出不一致的结果,则表示噪声消除时间没有通过,因为输入数据表示改变。 因此,不输出输入数据。 如果输出一致的结果,则表示循环计数器计数一个周期。 也就是说,噪音消除时间已经过去了。 因此,由于输入数据不被识别为噪声,因此输出输入数据。

    Time-multiplexed highway line designating system
    6.
    发明授权
    Time-multiplexed highway line designating system 失效
    多路复用公路线路指定系统

    公开(公告)号:US5299187A

    公开(公告)日:1994-03-29

    申请号:US948044

    申请日:1992-09-21

    CPC分类号: H04Q11/04

    摘要: A time-multiplexed highway line designating system used in a time divisional electronic switching unit comprises line interface units each being provided corresponding to each line, a storing unit provided in the interface unit for storing time slot information specific to each line processed in a time divisional manner, and a timing generating circuit provided in the interface unit for generating from the time slot information a timing for the line.

    摘要翻译: 在时分电子切换单元中使用的时分多路复用公路线路指定系统包括对应于每条线路提供的线路接口单元,存储单元,设置在接口单元中,用于存储特定于时分处理的每条线路的时隙信息 以及定时生成电路,其设置在所述接口单元中,用于从所述时隙信息生成所述线路的定时。