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公开(公告)号：US4661946A
公开(公告)日：1987-04-28
申请号：US738763
申请日：1985-05-29
CPC分类号： H04Q11/06
摘要： A digital switch module for a time division digital switching system includes an encoding law conversion memory and a control memory. The encoding law conversion memory has previously stored therein conversion data for converting between different types of encoding laws. For example, the A-law and .mu.-law encoding laws set forth in CCITT Recommendation G.711 can be converted by a digital switch module according to the present invention. The encoding law conversion memory includes a read only memory having regions for conversion between A-law and .mu.-law encoded data and for nonconversion of both A-law and .mu.-law encoded data. The control memory designates which of the regions in the encoding law conversion memory is to be used during each time slot, thus dynamically controlling whether data passing through the digital switch module is converted or not. The type of conversion or nonconversion designated by the control memory can be determined by the type of data, e.g., digitized voice signals may require conversion but non-voice signals will not be converted, and the channel path of the data, for example from an A-law encoded system to a .mu.-law encoded system.
摘要翻译： 用于时分数字切换系统的数字切换模块包括编码规则转换存储器和控制存储器。 编码规则转换存储器先前存储有用于在不同类型的编码规则之间进行转换的转换数据。 例如，CCITT建议书G.711中阐述的A律和mu-law编码法则可以由根据本发明的数字交换机模块转换。 编码规律转换存储器包括一个只读存储器，它具有用于A律和μ-编码数据之间转换的区域以及用于非法转换A律和μ-编码数据的区域。 控制存储器指定在每个时隙期间将使用编码规则转换存储器中的哪个区域，从而动态地控制是否转换通过数字开关模块的数据。 由控制存储器指定的转换或非转换的类型可以由数据类型来确定，例如，数字化的语音信号可能需要转换，但不会转换非语音信号，并且数据的信道路径例如来自 A律编码系统到mu -aw编码系统。
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公开(公告)号：US5185743A
公开(公告)日：1993-02-09
申请号：US651797
申请日：1991-02-07
CPC分类号： H04L12/5601 , H04L2012/5629 , H04L2012/563 , H04L2012/5636
摘要： An index value output circuit outputs an index value in response to a VCI added to the first signaling cell outputted from a terminal unit. A switching data output circuit outputs switching data for determining a path for signaling cells, based on the index value. Hence, by revising the index value according to a congestion state of an ATM switch, the above path is dynamically changed. The same index value is inserted in the second and subsequent signaling cells outputted from the terminal unit. Because switching data are based on the same index value, all signaling cells from the same terminal units are fed to the same signaling terminator.
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公开(公告)号：US5553068A
公开(公告)日：1996-09-03
申请号：US479865
申请日：1995-06-07
IPC分类号： H04L12/18 , H04L12/761 , H04Q11/04
CPC分类号： H04L12/5601 , H04L49/106 , H04L49/1576 , H04L49/203 , H04L49/255 , H04L49/309
摘要： An ATM (asynchronous transfer mode) cell broadcasting system for use in ATM switches comprises switch matrices for exchanging ATM cells inputted from a plurality of input highways and outputting them to a plurality of output highways. The ATM cell broadcasting system further includes tag information adders, provided at respective input terminals of the switch matrices, for adding tag information according to respective identifiers assigned to the ATM cells. Alternatively, ATM-cell-switching identifier determinant memories may be provided for respective switch elements in the switch matrices, for storing determinant data enabling the switch elements to determine, from the identifiers of the ATM cells, which ones of the ATM cells are to switch and output to their respective output highways.
摘要翻译： 用于ATM交换机的ATM（异步传输模式）小区广播系统包括用于交换从多个输入高速公路输入的ATM信元并将其输出到多个输出高速公路的交换矩阵。 ATM信元广播系统还包括设置在交换矩阵的相应输入端的标签信息加法器，用于根据分配给ATM信元的相应标识符添加标签信息。 或者，可以为开关矩阵中的各个开关元件提供ATM信元切换标识符决定因素存储器，用于存储确定性数据，使得交换元件能够从ATM信元的标识符确定哪些ATM信元要切换 并输出到各自的输出高速公路。
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公开(公告)号：US5070498A
公开(公告)日：1991-12-03
申请号：US563210
申请日：1990-08-06
IPC分类号： H04Q3/00 , H04L12/911
CPC分类号： H04L12/5602 , H04L2012/5632
摘要： Disclosed is a call control method for use with an ATM switch for integrating and switching various types of information which differ in traffic characteristics, such as voice, data and motion images, using an asynchronous transmission mode (ATM). When a call is made to the ATM switch, it is accepted only when it is possible to set a path that can guarantee the service requested by the call. When a call is made to the ATM switch, a load representing how much of the capacity of input links and output links of a self-routing module (SRM) constituting the ATM switch is obtained from the average value and peak value of the bit rate of the call. The load is added to each of current loads of the input and output links and buffers of the self-routing module which form a path in the ATM switch. A determination is made as to whether or not the result of the addition exceeds the maximum load of each of the input and output links and buffers. On determination that the maximum value is not exceeded, the call is accepted.
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公开(公告)号：US4580259A
公开(公告)日：1986-04-01
申请号：US359677
申请日：1982-03-19
摘要： A switchboard control system in which a plurality of switchboards are connected to a time division exchange and controlled by the time division exchange. A speech signal and a control signal (a signal for key information, display information, subscriber number information and other information necessary for the exchange operation by a switchboard operator), which are delivered and received by each switchboard and the time division exchange, are transmitted together by a common transmission line on a time-division-multiplexed basis. On the side of the system toward the switchboards are disposed a position controller, by which the signals are multiplexed and separated and the common transmission line and the switchboards are interconnected. For delivering and receiving the signals, common channel signalling equipment is connected to the time division exchange and remote channel signalling equipment is provided in the position controller. Between the signalling equipment, the control signal is transferred via the common transmission line and, between the remote common channel signalling equipment and each switchboard, it is transmitted via a control signal line comprising a common bus separate from a signal line for the speech signal.
摘要翻译： 一种交换机控制系统，其中多个交换机连接到时分交换并由时分交换控制。 发送由每个交换机传送和接收的语音信号和控制信号（用于密钥信息，显示信息，用户号码信息和由交换机操作员进行的交换操作所需的其他信息）的信号被传送 通过时分多路复用的公共传输线一起。 在朝向配电盘的系统一侧设置有位置控制器，通过该位置控制器将信号复用和分离，并且公共传输线和配电板互连。 为了发送和接收信号，公共信道信令设备连接到时分交换，并且位置控制器中提供远程信道信令设备。 在信令设备之间，控制信号通过公共传输线传输，并且在远程公共信道信令设备和每个交换机之间，经由包括与用于语音信号的信号线分开的公共总线的控制信号线传输。
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