公开(公告)号：US5136580A

公开(公告)日：1992-08-04

申请号：US524162

申请日：1990-05-16

申请人： Gary B. Videlock ,  Russell C. Gocht ,  AnneMarie Freitas ,  Mark J. Freitas

发明人： Gary B. Videlock ,  Russell C. Gocht ,  AnneMarie Freitas ,  Mark J. Freitas

IPC分类号： H04L12/46

CPC分类号： H04L12/4625 ,  H04L45/7453

摘要： An apparatus and method for learning and filtering destination and source addresses in a local area network (LAN) system is provided to facilitate the transfer of information packets from one local area network to another. The apparatus provides a link between two (or more) remotely located LANS through the use of a LAN bridge. The apparatus has a LAN controller interface, a microprocessor, a state machine and one or more content addressable memories which function to monitor an information packet received from the LAN. One such apparatus is connected to each of the LANs to be interfaced and each of these apparatus to each other in order to communicate messages between the LANs. Upon detection of an information packet, the apparatus examines both the source and destination addresses of the packet. The source address is compared to a dynamically generated table of source addresses and then compared to the incoming destination address. If the destination address is found in the table of source addresses, than the packet is destined for a node on the local LAN and thus will not be sent over the bridge between the two LANs. If, on the other hand, the destination address is not in the table, the packet is forwarded to the remote LAN.

摘要翻译： 提供了一种用于学习和过滤局域网（LAN）系统中的目的地和源地址的装置和方法，以便于将信息分组从一个局域网传输到另一个局域网。 该设备通过使用LAN桥提供两个（或更多）远程定位的LAN之间的链路。 该装置具有LAN控制器接口，微处理器，状态机以及用于监视从LAN接收到的信息包的功能的一个或多个内容可寻址存储器。 一个这样的设备被连接到要接口的每个LAN，并且这些设备中的每一个彼此连接，以便在LAN之间传送消息。 在检测到信息分组时，设备检查分组的源和目的地址。 将源地址与动态生成的源地址表进行比较，然后与传入的目标地址进行比较。 如果在源地址表中找到目标地址，则该分组将发往本地LAN上的节点，因此不会通过两个LAN之间的桥发送。 另一方面，如果目的地址不在表中，则该分组被转发到远程LAN。

公开(公告)号：US5251213A

公开(公告)日：1993-10-05

申请号：US881806

申请日：1992-05-12

申请人： Gary B. Videlock ,  Russell C. Gocht ,  Tom P. Gloria ,  Douglas Wainer

发明人： Gary B. Videlock ,  Russell C. Gocht ,  Tom P. Gloria ,  Douglas Wainer

IPC分类号： H04L12/46 ,  H04J3/02

CPC分类号： H04L12/4625 ,  H04L12/4637

摘要： A multiport source routing token ring bridge is provided which permits a single local area network bridge to interconnect to multiple remote bridges without limitations on the number of rings and bridges interspersed between a data packet's source and its intended destination. The bridge receives a packet and then scans the packet for ring-in information which matches the ring to which the bridge is attached. If this match is not successful, then the packet is not passed to the software and the address recognize and frame copy bits at the end of the packet are not set. If the match is successful, then the bridge number and next ring-in (or ring-out) segment information from the packet are used as addresses to a static RAM array. The array is preprogrammed with all valid bridge number and ring-out combinations which may be accessed by the multiport source routing bridge. If addressing of the array produces a valid indication, then the packet is passed to software for forwarding to the appropriate local area network or wide area network ports. On the other hand, if the address does not produce an indication that it can be reached through the bridge, then the hardware parses the packet to extract the next ring and bridge information, and repeats the above process until either a complete match is found and the packet is passed, or the information field is exhausted and the packet is finally rejected.

摘要翻译： 提供了一种多端口源路由令牌环形网桥，其允许单个局域网桥连接到多个远程网桥，而不限制散布在数据分组的源和其预期目的地之间的环和桥的数量。 桥接收数据包，然后对数据包进行扫描，该信息与桥连接的环相匹配。 如果该匹配不成功，则该数据包不会传递给软件，并且该地址被识别，并且数据包末尾的帧复制位未被设置。 如果匹配成功，则将来自数据包的桥号和下一个环入（或振铃）段信息用作静态RAM阵列的地址。 该阵列使用可由多端口源路由桥接器访问的所有有效的桥号和振铃组合进行预编程。 如果阵列的寻址产生有效的指示，则该分组被传递到软件以转发到适当的局域网或广域网端口。 另一方面，如果地址不产生通过网桥可以达到的指示，则硬件解析分组以提取下一个环和桥接信息，并重复上述过程，直到发现完全匹配， 分组被传递，或者信息字段被耗尽并且分组被最终拒绝。

公开(公告)号：US4699504A

公开(公告)日：1987-10-13

申请号：US893750

申请日：1986-08-06

申请人： Harold L. Kabb ,  John R. Flint ,  Gary B. Videlock ,  Ishfaq A. Niazi ,  Kenneth L. Hendrickson ,  Gary S. Slutsky ,  Stuart F. Schwalb ,  John J. Carroll ,  Paul H. Friedrich

发明人： Harold L. Kabb ,  John R. Flint ,  Gary B. Videlock ,  Ishfaq A. Niazi ,  Kenneth L. Hendrickson ,  Gary S. Slutsky ,  Stuart F. Schwalb ,  John J. Carroll ,  Paul H. Friedrich

IPC分类号： G03B15/00 ,  G03B27/47 ,  G03B27/72 ,  G03B27/80

CPC分类号： G03B27/47 ,  G03B15/003

摘要： A distributed processor control system for use with a microimage recording apparatus includes a system control unit, a machine control unit and an operator control unit. The system control unit includes a microprocessor that provides supervisory or master control for the overall distributed control system. The machine control unit includes at least one microprocessor for controlling the operations of a plurality of electromechanical components within the microimage recording apparatus in response to commands and parameters provided by the system control unit and for providing status and error information and requests to the system control unit. The operator control unit includes a microprocessor for controlling the display of operational status and error indications and messages for viewing by an operator and for receiving manual operator entries for enabling normal operation of and diagnostics for the microimage recording apparatus. A shared memory device is utilized for bidirectional communications between the system control unit and the machine control unit. An asynchronous, bidirectional serial link enables bidirectional data transfer between the system control unit and the operator control unit.

摘要翻译： 用于微图像记录装置的分布式处理器控制系统包括系统控制单元，机器控制单元和操作者控制单元。 系统控制单元包括为整个分布式控制系统提供监控或主控制的微处理器。 机器控制单元包括至少一个微处理器，用于响应于由系统控制单元提供的命令和参数控制微图像记录装置内的多个机电部件的操作，并且向系统控制单元提供状态和错误信息和请求 。 操作员控制单元包括微处理器，用于控制操作状态和错误指示的显示以及用于操作者查看的消息，并且用于接收手动操作员条目以使微图像记录装置能够正常操作和诊断。 共享存储器件用于系统控制单元和机器控制单元之间的双向通信。 异步双向串行链路可以在系统控制单元和操作员控制单元之间实现双向数据传输。

公开(公告)号：US5134611A

公开(公告)日：1992-07-28

申请号：US252202

申请日：1988-09-30

申请人： Bradford R. Steinka ,  Gary B. Videlock ,  Eugene Y. G. Chang

发明人： Bradford R. Steinka ,  Gary B. Videlock ,  Eugene Y. G. Chang

IPC分类号： H04Q11/04

CPC分类号： H04Q11/0428 ,  H04Q2213/1309 ,  H04Q2213/13174 ,  H04Q2213/13199 ,  H04Q2213/13202 ,  H04Q2213/13209

摘要： A data communications method and system is provided to facilitate the communication between a plurality of units of data terminal equipment (DTE) connected over communication lines. A first DTE unit is located in a digital network and a second DTE unit is located in either a digital network or in an analog network. When attempting to place a call from the first DTE unit in the digital network to the second DTE unit in either a digital network or an analog network, a first call is made to determine the characteristics of the second DTE unit called. If the second DTE unit called returns an indication that it also possesses digital capability, then the call is established. If, however, the indication from the second DTE unit called is that it does not have digital capability, then the first DTE unit places a second call through a modem within a terminal adapter within the system to the second DTE unit. The system is also capable of receiving a call made to the first DTE from outside the digital network. The system also has the capability of establishing an error-free connection between the first DTE and second DTE units.

摘要翻译： 提供数据通信方法和系统以便于在通过通信线路连接的数据终端设备（DTE）的多个单元之间进行通信。 第一个DTE单元位于数字网络中，第二个DTE单元位于数字网络或模拟网络中。 当尝试将来自数字网络中的第一DTE单元的呼叫发送到数字网络或模拟网络中的第二DTE单元时，首先呼叫确定所调用的第二DTE单元的特性。 如果所呼叫的第二个DTE单元返回其具有数字能力的指示，则建立呼叫。 然而，如果来自所呼叫的第二DTE单元的指示是它没有数字能力，则第一DTE单元通过调制解调器将系统内的终端适配器中的第二呼叫发送到第二DTE单元。 该系统还能够从数字网络外部接收对第一个DTE的呼叫。 该系统还具有在第一DTE和第二DTE单元之间建立无错误连接的能力。