Method of managing virtual networks using a virtual network identifier
    1.
    发明授权
    Method of managing virtual networks using a virtual network identifier 失效
    使用虚拟网络标识符管理虚拟网络的方法

    公开(公告)号:US5892912A

    公开(公告)日:1999-04-06

    申请号:US739435

    申请日:1996-10-29

    摘要: A method is provided for managing virtual networks wherein switching hubs, each having ports to which nodes are respectively connected and having a bridging function, are interconnected via an ATM network, and predetermined ones of the ports of the switching hubs are grouped in order to construct virtual LANs. Data from a source node is transmitted to nodes belonging to the same group as the source node. A VLAN server, which stores MAC addresses of these nodes and VLAN identifiers in association with each other, is connected to the ATM network and collectively manages all nodes by means of the MAC addresses. The switching hub makes an inquiry for a VLAN identifier, and reconstructs or modifies the VLAN in accordance with a VLAN identifier responded from the VLAN server.

    摘要翻译: 提供了一种用于管理虚拟网络的方法,其中每个具有分别连接并具有桥接功能的端口的交换集线器经由ATM网络互连,并且交换集线器的预定端口被分组以构建 虚拟局域网。 来自源节点的数据被发送到属于与源节点相同组的节点。 将这些节点的MAC地址和VLAN标识符相互关联的VLAN服务器连接到ATM网络,并通过MAC地址共同管理所有节点。 交换集线器查询VLAN标识符,并根据从VLAN服务器响应的VLAN标识重建或修改VLAN。

    Current consumption control device
    3.
    发明授权
    Current consumption control device 失效
    电流消耗控制装置

    公开(公告)号:US5298795A

    公开(公告)日:1994-03-29

    申请号:US27569

    申请日:1993-03-05

    摘要: A device for controlling the current consumption of a power supply which applies a voltage to a transmission control circuit for transmitting a transmission signal with respect to a transmission line is provided. A power supply stabilizing circuit for stabilizing a voltage applied from the power supply; an amplitude detection circuit for detecting a transmission signal input from the transmission line; a switching circuit for interrupting application of a voltage from the power supply stabilizing circuit to the transmission control circuit; and a control circuit for controlling the open/closed state of the switching circuit according to the presence or absence of a transmission signal detected by the amplitude detection circuit are provided, and only when the amplitude detection circuit has detected the transmission signal, the control circuit sets the switching circuit into the closed state so as to permit a voltage to be applied to the transmission control circuit. When no transmission signal is transmitted, application of an unnecessary voltage to the transmission control circuit is interrupted, thereby reducing the current consumption.

    摘要翻译: 提供了一种用于控制向传输控制电路施加电压以用于相对于传输线传输传输信号的电源的电流消耗的装置。 一种用于稳定从电源施加的电压的电源稳定电路; 幅度检测电路,用于检测从传输线输入的传输信号; 用于中断从电源稳定电路向传输控制电路施加电压的开关电路; 并且提供一种用于根据振幅检测电路检测到的发送信号的存在或不存在来控制开关电路的开/关状态的控制电路,并且只有当振幅检测电路检测到发送信号时,控制电路 将开关电路设置为闭合状态,以允许将电压施加到变速器控制电路。 当没有发送发送信号时,向发送控制电路施加不必要的电压被中断,从而降低电流消耗。

    Multipath transmission system
    4.
    发明授权
    Multipath transmission system 失效
    多路传输系统

    公开(公告)号:US5321689A

    公开(公告)日:1994-06-14

    申请号:US24815

    申请日:1993-03-01

    摘要: A multipath transmission system of this invention includes a plurality of multiplex nodes connected in parallel to three common signal transmission lines. The multiplex node includes a transmission control circuit which is allotted to a corresponding one of devices, receives a multiplex signal from the device in response to a transmission request of another multiplex node and transmits the multiplex signal to the signal transmission line. It includes a voltage detection circuit for detecting a voltage generated in at least one of the transmission lines, a reception control circuit for specifying the transmission state of the signal transmission line according to a voltage detected by the voltage detection circuit, a communication control device for communicating with the multiplex nodes to detect fault, and a voltage setting circuit for changing a voltage of the signal transmission line when fault is detected by the communication control device.

    摘要翻译: 本发明的多径传输系统包括与三个公共信号传输线并联连接的多个复用节点。 多路复用节点包括分配给相应设备的传输控制电路,响应于另一个多路复用节点的传输请求从设备接收多路复用信号,并将该多路复用信号发送到信号传输线路。 它包括用于检测在至少一个传输线中产生的电压的电压检测电路,用于根据由电压检测电路检测的电压指定信号传输线的传输状态的接收控制电路,用于 与多路复用节点通信以检测故障;以及电压设置电路,用于在由通信控制设备检测到故障时改变信号传输线路的电压。