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1.发明授权Switching device for connecting a data transmission system to the telephone switched network 失效用于将数据传输系统连接到电话交换网络的切换设备
公开(公告)号：US4910763A
公开(公告)日：1990-03-20
申请号：US322017
申请日：1989-03-13
申请人： Francois Caron , Jean Cholat-Namy , Emile Morlec
发明人： Francois Caron , Jean Cholat-Namy , Emile Morlec
摘要： A data transmission system is described which includes a switching circuit that enables the connection of a tributary modem to a control modem via the public switched network. Switching occurs when it is no longer possible to transmit data on the leased network because the line connected to the tributary modem has failed. The switching circuit can connect either the permanent leased line or the switched network to the receiver of the control modem. It comprises a narrow pass-band filter and detector which is permanently connected between the reception side of the switched network and the control modem receiver. When the tributary modem answers a call from the control modem, it sends a tone ahead of the data message, the frequency of which tone corresponds to the frequency of the pass-band filter and is out of the data band. When such a tone is detected by the detector and pass-band filter, the control modem toggles a two position switch which isolates the leased line and connects the switched network to the receiver of the control modem.
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2.发明授权Process for determining active channel configurations in a multiplex communications system and a system for implementing said process 失效用于确定多路复用通信系统中的有源信道配置的过程和用于实现所述过程的系统
公开(公告)号：US4477898A
公开(公告)日：1984-10-16
申请号：US368600
申请日：1982-04-15
申请人： Jean Cholat-Namy
发明人： Jean Cholat-Namy
CPC分类号： H04J3/1682 , H04J3/24
摘要： In a variable configuration multiplex transmission method, correct sending of data to their respective addressees (terminals 22, 24, 26 and/or 28) supposes that reception station (34) can determine which is the channel configuration from amongst configurations (A, B, C and/or D) that is active. This invention is adapted to proceed to such a channel determination by multiplexing a predetermined particular character from the active channels, directly transmitting over transmission channel (32) the multiplexed predetermined character burst, receiving (34) the multiplexed character burst, and using the received character burst in order to read a pre-registered table which directly gives out that channel configuration which has active channels.
摘要翻译： 在可变配置复用传输方法中，将数据正确发送到它们各自的接收者（终端22,24,26和/或28），假设接收站（34）可以从配置（A，B， C和/或D）。 本发明适用于通过多路复用来自有源信道的预定特定字符进行这种信道确定，直接通过传输信道（32）传输多路复用的预定字符脉冲串，接收（34）多路复用字符脉冲串，并使用接收到的字符 突发，以便读取预先注册的表，其直接发出具有活动信道的信道配置。
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公开(公告)号：US4751510A
公开(公告)日：1988-06-14
申请号：US855255
申请日：1986-04-24
申请人： Francois de Saint Michel , Jacques Belloc , Jean Cholat-Namy , Michel Choquet , Simon Huon , Daniel Pilost , Victor Spagnol
发明人： Francois de Saint Michel , Jacques Belloc , Jean Cholat-Namy , Michel Choquet , Simon Huon , Daniel Pilost , Victor Spagnol
CPC分类号： H04L43/50 , H04L1/24 , H04L12/2697
摘要： A DTE can control the modems attached thereto by transmitting command messages over the data path and analyzing report messages supplied by the modems in return. Each command message is identified by a specific header. A command message intended for a remote modem (34) is intercepted by the local modem (30) and reformatted so as to obtain a supervisory message that is then transmitted at the rate of one bit per baud. A command message intended for a remote multichannel modem (48) is transmitted either by a supervisory message or in the data mode of operation.
摘要翻译： DTE可以通过在数据路径上发送命令消息并分析调制解调器提供的报告消息来控制附加的调制解调器。 每个命令消息由特定头标识。 用于远程调制解调器（34）的命令消息被本地调制解调器（30）拦截并重新格式化，以便获得一个监控消息，然后以每个波特率一位的速率传输。 用于远程多信道调制解调器（48）的命令消息由监视消息或数据操作模式传输。
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4.发明授权Multiport modem and the use thereof in a method and a system for testing a multilevel communication network 失效多端口调制解调器及其在用于测试多电平通信网络的方法和系统中的使用
公开(公告)号：US4419751A
公开(公告)日：1983-12-06
申请号：US315794
申请日：1981-10-28
申请人： Jean Cholat-Namy , Simon Huon , Philippe Thirion
发明人： Jean Cholat-Namy , Simon Huon , Philippe Thirion
CPC分类号： H04L43/50 , H04J3/14 , H04L12/2697
摘要： A method of testing a communication network that comprises a first and a second multiport modem communicating with each other through a transmission channel, each of said modems being provided with a number of input/output interfaces and each of the interfaces on either modem being associated with a corresponding interface on the other modem. In accordance with the method of the present invention, a test request is applied to one of the interfaces on the first multiport modem, which responds thereto by generating a test configuration code identifying that interface. This modem is then caused to assume a so-called test configuration, in which only that interface to which the test request was applied is active, and a test command comprising an indication of the test to be performed and a link level identifier is applied to that interface. If the identifier designates the link level to which the first modem belongs, this modem will control the test specified in the test command. If another link level is designated, then the test command and the test configuration code will both be sent to the second multiport modem. The second modem will then decode the link level identifier and, if the link level so designated is not the one to which it pertains, will assume a test configuration such that only the interface associated with the first modem interface which received the test request will be active, and the test command will be applied to that active interface. In accordance with another aspect of the invention the test configuration code also identifies the bit rate associated with the test command. The invention also provides a test system that implements the above method. The invention further provides an improved multiport modem to be used in conjunction with the test method and system mentioned above.
摘要翻译： 一种测试通信网络的方法，该通信网络包括通过传输信道彼此通信的第一和第二多端口调制解调器，每个所述调制解调器被提供有多个输入/输出接口，并且任一调制解调器上的每个接口与 另一个调制解调器上的相应接口。 根据本发明的方法，将测试请求应用于第一多端口调制解调器上的接口之一，通过生成识别该接口的测试配置代码来对其进行响应。 然后使该调制解调器采取所谓的测试配置，其中只有应用测试请求的接口是活动的，并且测试命令包括要执行的测试的指示，并且将链路级标识符应用于 那个界面。 如果标识符指定第一个调制解调器所属的链路级，则该调制解调器将控制测试命令中指定的测试。 如果指定了另一个链路级别，则测试命令和测试配置代码都将被发送到第二个多端口调制解调器。 然后，第二调制解调器将对链路级别标识符进行解码，并且如果所指定的链路级别不是与其相关的链路级别，则将采用测试配置，使得仅接收与接收到测试请求的第一调制解调器接口相关联的接口将是 active，并且测试命令将应用于该活动接口。 根据本发明的另一方面，测试配置代码还识别与测试命令相关联的比特率。 本发明还提供了一种实现上述方法的测试系统。 本发明还提供了一种与上述测试方法和系统一起使用的改进的多端口调制解调器。
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