公开(公告)号：WO1998051120A2

公开(公告)日：1998-11-12

申请号：PCT/US1997023609

申请日：1997-12-19

Applicant: 3COM CORPORATION

Inventor： 3COM CORPORATION ,  BRENNAN, Daniel, M. ,  CHEN, Cheng, T.

IPC: H04Q11/06

CPC classification number: H04L25/0262 ,  H04Q11/0471 ,  H04Q2213/13003 ,  H04Q2213/13034 ,  H04Q2213/1305 ,  H04Q2213/1307 ,  H04Q2213/13093 ,  H04Q2213/13097 ,  H04Q2213/13103 ,  H04Q2213/13106 ,  H04Q2213/13109 ,  H04Q2213/1316 ,  H04Q2213/13166 ,  H04Q2213/13174 ,  H04Q2213/13175 ,  H04Q2213/13176 ,  H04Q2213/13199 ,  H04Q2213/13202 ,  H04Q2213/13204 ,  H04Q2213/13209 ,  H04Q2213/13213 ,  H04Q2213/13216 ,  H04Q2213/13297 ,  H04Q2213/13298 ,  H04Q2213/13299 ,  H04Q2213/13362 ,  H04Q2213/13389 ,  H04Q2213/13405

Abstract: Apparatus for an improved ISDN terminal adapter (5) and accompanying methods for use therein. The adapter provides automatic ISDN switch detection, automatic SPID configuration, baud rate unblocking and automatic data compression. Specifically, the adapter automatically detects a type of ISDN switch (480) to which the adapter is connected by analyzing D-channel initialization messages which are received by the adapter from the switch as well as specific responses to ISDN messages sent by the adapter. The switch type value is then used, during SPID determination, in conjunction with a telephone area code of the user, to access an internal database (435) of predefined SPID formats, referenced in terms of particular telephone service areas and switch types, to access the possible SPID format(s) for the ISDN switch. Firmware (460) executing within the DTE, forms one of more SPID(s) appropriate for the switch, queries the switch with each of these SPIDs to select and verify a correct SPID from those formed, and, if necessary, further refine and update the switch type previously determined. As to baud rate unblocking, the adapter detects instances of baud rate blocking, through excessive communication errors for a known input, and forces the adapter to relinquish its high speed setting and automatically return to autobaud operation but at a lower maximum speed. The adapter also automatically provides B-channel data compression in the event the DTE is unwilling or unable to do so. Here, the adapter monitors negotiation, over an ISDN line, of a compression control protocol (CCP) between the DTE and far-end equipment (5', 1130). If the negotiations reveal that the DTE will not undertake compression, then the adapter will then automatically negotiate the protocol and thereafter, for the duration of a call, perform compression and decompression in lieu of the DTE.

Abstract translation: 用于改进的ISDN终端适配器（5）的装置及其中使用的相关方法。 适配器提供自动ISDN切换检测，自动SPID配置，波特率解锁和自动数据压缩。 具体来说，适配器通过分析适配器从交换机接收的D信道初始化消息以及由适配器发送的ISDN消息的特定响应，自动检测适配器连接到的ISDN交换机（480）的类型。 然后，在SPID确定期间，与用户的电话区域代码一起使用交换机类型值，以访问以特定电话服务区域和交换机类型为参考的预定义SPID格式的内部数据库（435），以访问 ISDN交换机可能的SPID格式。 在DTE内执行的固件（460）形成适合于交换机的更多SPID之一，用这些SPID中的每一个查询交换机，从形成的SPID中选择和验证正确的SPID，并且如果需要，进一步细化和更新 以前确定的开关类型。 关于波特率解除阻塞，适配器通过已知输入的过度通信错误来检测波特率阻塞的实例，并强制适配器放弃其高速设置，并自动返回到自动波特率操作，但以较低的最大速度。 如果DTE不愿意或不能这样做，适配器还会自动提供B通道数据压缩。 这里，适配器通过ISDN线路监视DTE和远端设备（5'，1130）之间的压缩控制协议（CCP）的协商。 如果谈判显示DTE不进行压缩，则适配器然后将自动协商协议，此后，在呼叫期间，执行压缩和解压缩来代替DTE。

公开(公告)号：WO1998026541A1

公开(公告)日：1998-06-18

申请号：PCT/US1997022816

申请日：1997-12-12

Applicant: 3COM CORPORATION

Inventor： 3COM CORPORATION ,  FLETCHER, Rick ,  BANTHIA, Prakash

IPC: H04L12/24

CPC classification number: H04L29/06 ,  G06F8/65 ,  H04L41/0213 ,  H04L41/042 ,  H04L41/044 ,  H04L41/046 ,  H04L41/142 ,  H04L41/28 ,  H04L41/5009 ,  H04L41/509 ,  H04L43/10 ,  H04L43/106 ,  H04L43/12 ,  H04L67/34 ,  H04L67/42 ,  H04L69/329 ,  H04L2012/5626 ,  H04W24/08

Abstract: Distributed remote monitoring (dRMON) of network traffic and performance uses distributed nodes to collect traffic statistics at distributed points in the network. These statistics are forwarded to collectors which compile the statistics to create combined views of network performance. A collector may mimic a prior art, non-distributed, network probe and may interact with network management software as though it were a stand-alone network probe thereby simplifying a user's interaction with the distributed system. The invention is designed to work in accordance with a variety of standard network management protocols including SNMP, RMON, and RMON2 but is not limited to those environments. The invention has applications in a variety of communication system environments including local area networks, cable television distribution systems, ATM systems, and advanced telephony systems. A specific embodiment of the invention is particularly optimized to work in LAN environments with end systems running under Windows-compatible network operating systems.

Abstract translation: 网络流量和性能的分布式远程监控（dRMON）使用分布式节点在网络中的分布点收集流量统计信息。 这些统计信息将转发给收集者，编辑统计信息以创建网络性能的综合视图。 收集器可以模拟现有技术的非分布式网络探测器，并且可以与网络管理软件交互，就像它是独立的网络探测器一样，从而简化了用户与分布式系统的交互。 本发明被设计为根据各种标准网络管理协议（包括SNMP，RMON和RMON2）工作，但不限于这些环境。 本发明在各种通信系统环境中应用，包括局域网，有线电视分配系统，ATM系统和高级电话系统。 本发明的具体实施例被特别优化以在具有在Windows兼容网络操作系统下运行的终端系统的LAN环境中工作。

公开(公告)号：WO1998007278A2

公开(公告)日：1998-02-19

申请号：PCT/US1997013039

申请日：1997-08-06

Applicant: 3COM CORPORATION ,  PROCTOR, John, J. ,  BALDASSARI, Mark, M. ,  RICHARDSON, Craig, H. ,  HODGES, Chris, J. ,  TRUONG, Kwan, K. ,  SMITH, David, L. ,  DESJARDINS, Philip, A. ,  KNIGHT, Thomas, H.

Inventor： 3COM CORPORATION

IPC: H04N07/28

CPC classification number: H04N19/94 ,  G06T9/008

Abstract: A method and an apparatus for encoding an image signal. The apparatus includes an acquisition module disposed to receive the image signal. A first processor is coupled to the acquisition module. At least one encoder processor is coupled to the first processor. The at least one encoder processor produces an encoded image signal under control of the first processor. The method includes the steps of converting an input image signal to at least one encoder processor. The method further includes the step of applying, at the at least one encoder processor, a hierarchical vector quantization compression algorithm to the digitized image signal. At the next step, a resultant encoded bit stream generated by the application of the algorithm is collected. The method and apparatus of the present invention may be used in conjunction with an ordinary modem to transmit and/or receive audio, video sequences of still images.

Abstract translation: 一种用于对图像信号进行编码的方法和装置。 该装置包括被设置为接收图像信号的采集模块。 第一处理器耦合到采集模块。 至少一个编码器处理器耦合到第一处理器。 所述至少一个编码器处理器在第一处理器的控制下产生编码图像信号。 该方法包括将输入图像信号转换为至少一个编码器处理器的步骤。 该方法还包括在至少一个编码器处理器上对数字化图像信号应用分层矢量量化压缩算法的步骤。 在下一步骤中，收集通过算法应用产生的最终编码比特流。 本发明的方法和装置可以与普通调制解调器一起使用以发送和/或接收静止图像的音频，视频序列。

公开(公告)号：WO1996041454A1

公开(公告)日：1996-12-19

申请号：PCT/US1996008843

申请日：1996-06-03

Applicant: 3COM CORPORATION

Inventor： 3COM CORPORATION ,  KRANZLER, David, A. ,  CHU, Ching-Yao ,  TANG, Wen-Tsung

IPC: H04L12/413

CPC classification number: H04L12/46 ,  H04L12/413 ,  H04L12/44

Abstract: A class II stackable 100 Mbps Ethernet repeater architecture (200) achievable by use of two different types of wired-OR interconnection in an Ethernet backplane, a Bus Transceiver Logic (BTL) wired-OR to select control, data and clock lines, and a highspeed Transistor-Transistor Logic (TTL) which is wired-OR'ed together in three-level logic on a common activity signal line. The backplanehas sufficiently low signal latency to permit two logical repeaters to be connected together with at least eight stackable repeater modules (210) in each logical repeater (200), each repeater module having thirteen to sixteen station ports (250) to support as many as 254 stations in a 100 Mbps environment with a diameter of205 meters, which is up to 8.5 times greater than previously achievable.

Abstract translation: 通过在以太网背板中使用两种不同类型的有线或互连可实现的二级可堆叠100Mbps以太网中继器架构（200），用于选择控制，数据和时钟线路的总线收发器逻辑（BTL）线或或 高速晶体管 - 晶体管逻辑（TTL），其在公共活动信号线上的三电平逻辑中进行有线或并联。 背板具有足够低的信号延迟以允许两个逻辑中继器与每个逻辑中继器（200）中的至少八个可堆叠中继器模块（210）连接在一起，每个中继器模块具有十三到十六个站端口（250），以支持多达 254个站在100 Mbps的环境中，直径为205米，高达以前可实现的8.5倍。

公开(公告)号：WO1996036921A1

公开(公告)日：1996-11-21

申请号：PCT/US1996006810

申请日：1996-05-13

Applicant: 3COM CORPORATION

Inventor： 3COM CORPORATION ,  FULLER, Mark

IPC: G06F15/16

CPC classification number: G05B19/4097 ,  G05B2219/31323 ,  G05B2219/34253 ,  G05B2219/34255 ,  G05B2219/35059 ,  Y02P90/24 ,  Y02P90/265

Abstract: An integrated manufacture and design system (100) and a database translator (120) that allows use of a subset of data directly from a CAD database to provide the necessary control data for use in a CAM assembly system (140). A database translator according to the present invention can examine the CAD data specifying a product, determine which of the component parts of that product are unknown to the CAM assembly system, and can insert into the CAM assembly system's database whatever new information the CAM system requires to manufacture the product. The invention may be embodied as a number of software modules on a fixed medium such as a computer readable disk or computer memory.

Abstract translation: 一种集成制造和设计系统（100）和数据库翻译器（120），其允许直接从CAD数据库使用数据子集来提供用于CAM组装系统（140）中的必要控制数据。 根据本发明的数据库翻译器可以检查指定产品的CAD数据，确定该产品的哪些组成部分对于CAM组装系统是未知的，并且可以将CAM系统需要的任何新信息插入到CAM组装系统的数据库中 制造产品。 本发明可以被实现为诸如计算机可读盘或计算机存储器的固定介质上的许多软件模块。

公开(公告)号：WO1996019877A1

公开(公告)日：1996-06-27

申请号：PCT/US1995016636

申请日：1995-12-19

Applicant: 3COM CORPORATION

Inventor： 3COM CORPORATION ,  BURNS, Lawrence, M. ,  PODELL, Allen ,  FISHER, David, A. ,  RAMACHANDRAN, Ravi

IPC: H04B07/00

CPC classification number: H04L27/2017 ,  H04L12/413 ,  H04W24/00 ,  H04W84/12

Abstract: A collision detection method and apparatus which is suitable for use in a wireless CSMA/CD network, or other wireless networks where collision detection is provided. The apparatus includes a detector (31, 41) which detects intermodulation or other mixing products of colliding data transmissions at a station in the network, and a signal processor (36) which indicates collisions between the data transmissions based upon characteristics of the intermodulation products. The system is capable of detecting collisions, both between transmissions from the station on which the device is located and transmissions from other sources, and between two transmissions being received from other sources. The station includes a transmitter (39) having an input for a data packet. Resources (37) coupled to the input add a header (250-254) to the data packet, the header (250-254) having characteristics monitored by the collision detector circuitry including a pseudorandom bit sequence (253). Data transmission signals are supplied to the transmitter (39) in response to the header (250-254) and the data packet. Thus, collisions occurring during transmission of the header sequence (253) have intervals during which a mismatch occurs between the colliding signal and the data transmission.

Abstract translation: 适用于无线CSMA / CD网络或提供冲突检测的其他无线网络的碰撞检测方法和装置。 该装置包括检测器（31,41），其检测在网络中的站处碰撞数据传输的互调或其他混合产物;以及信号处理器（36），其基于互调产物的特性指示数据传输之间的冲突。 该系统能够检测来自设备所在的站的传输与来自其他源的传输之间的冲突以及从其他源接收的两个传输之间的冲突。 该站包括具有用于数据分组的输入的发射机（39）。 耦合到输入的资源（37）向数据分组添加报头（250-254），具有由包括伪随机比特序列（253）的冲突检测器电路监控的特征的报头（250-254）。 响应于报头（250-254）和数据分组，将数据传输信号提供给发射机（39）。 因此，在报头序列（253）的传输期间发生的冲突具有间隔期间，在冲突信号和数据传输之间发生失配。

公开(公告)号：WO1994022087A1

公开(公告)日：1994-09-29

申请号：PCT/US1994000004

申请日：1994-01-03

Applicant: 3COM CORPORATION

Inventor： 3COM CORPORATION ,  NILAKANTAN, Chandrasekharan ,  LOI, Ly ,  ARUNKUMAR, Nagaraj ,  SEAMAN, Michael, John

IPC: G06F13/00

CPC classification number: H04L29/12018 ,  H04L29/06 ,  H04L29/12009 ,  H04L49/351 ,  H04L61/10

Abstract: A reverse address resolution protocol for use in a communication network which allows resolution logic to provide a higher level protocol information (such as an IP address) to a source of a request (127) for such information (122), independent of the physical network address of such source. The protocol is used in a processor having a plurality of ports, at least one of such ports connected by a point-to-point channel to a remote network device. Reverse address resolution protocol is responsive (129) to a resolution request from the remote network device across the point-to-point channel to supply the higher level protocol information based upon the port through which the resolution request is received (125), rather than the physical network address of the requesting device. Thus, a remote device may be coupled to a network, and connected to a central management site across a point-to-point communication link, in a "plug and play" mode. The person connecting the device to the remote network does not need to determine the physical network address of the device or configure the device with a higher level address protocol.

Abstract translation: 一种在通信网络中使用的反向地址解析协议，其允许解析逻辑向独立于物理网络的这种信息（122）的请求（127）的源提供更高级别的协议信息（诸如IP地址） 地址这样的来源。 该协议用于具有多个端口的处理器中，至少一个这样的端口通过点到点信道连接到远程网络设备。 反向地址解析协议响应（129）来自远程网络设备在点对点信道上的解析请求，以基于接收解析请求的端口（125）提供更高级协议信息，而不是 请求设备的物理网络地址。 因此，远程设备可以耦合到网络，并且以“即插即用”模式通过点对点通信链路连接到中央管理站点。 将设备连接到远程网络的人不需要确定设备的物理网络地址或配置具有较高级别地址协议的设备。

公开(公告)号：WO1994018627A2

公开(公告)日：1994-08-18

申请号：PCT/US1993012652

申请日：1993-12-28

Applicant: 3COM CORPORATION

Inventor： 3COM CORPORATION ,  EMERY, Acott, Andrew ,  PETERSEN, Brian ,  SHERER, W., Paul

IPC: G06F13/24

CPC classification number: G06F13/24

Abstract: Indication and interrupt signals generated by a network adapter representing asynchronous events are managed by a host system. The network adapter comprises a first mask logic for selectively disabling the indication signals from being stored in a first memory location by the host writing to a first mask register. A second mask logic which is coupled to the first memory location also selectively disables the indication signals from being stored in a second memory location creating two levels of status information. The indication signals may also be disabled from being stored in the second memory location responsive to the host writing to a second mask register. The first memory location may be read from the host in order to determine whether a network event occurred during an interrupt service routine, while interrupt means generates an interrupt signal to the host responsive to the value in the second memory location. A third level of control is provided by an internal counter which allows for automatic enabling and/or disabling of a plurality of indications and interrupts with and without explicit commands in the host driver subroutines.

Abstract translation: 由代表异步事件的网络适配器产生的指示和中断信号由主机系统管理。 网络适​​配器包括第一屏蔽逻辑，用于通过主机向第一屏蔽寄存器写入来选择性地禁止指示信号存储在第一存储器位置。 耦合到第一存储器位置的第二掩模逻辑还选择性地禁止指示信号被存储在创建两级状态信息的第二存储器位置中。 响应于主机向第二屏蔽寄存器的写入，指示信号也可被禁止存储在第二存储单元中。 可以从主机读取第一存储器位置，以便确定在中断服务程序期间是否发生网络事件，而中断装置响应于第二存储器位置中的值产生对主机的中断信号。 第三级控制由内部计数器提供，其允许在主机驱动程序子程序中具有和不具有明确命令的情况下允许自动启用和/或禁用多个指示和中断。

公开(公告)号：WO1998026556A1

公开(公告)日：1998-06-18

申请号：PCT/US1997022916

申请日：1997-12-12

Applicant: 3COM CORPORATION

Inventor： 3COM CORPORATION ,  SHERER, William, Paul

IPC: H04L29/06

CPC classification number: H04L63/1475 ,  H04L12/40032

Abstract: A data pattern enforcer provides secure network communications at an adaptor layer by comparing transmitted and received packets to a set of rules to verify that said packets are appropriately being transmitted or received. The data pattern enforcer prevents application or other software with access to an adaptor on a network from using the adaptor for packet sniffing or spoofing. In a specific embodiment, the data pattern enforcer verifies packets at the layer 2 adaptor level using a value bit vector (which may be alterable or may be preset to a value, including to zero), a count value, and a mask to compare to data found in packets.

Abstract translation: 数据模式执行器通过将发送和接收的分组与一组规则进行比较来提供在适配器层的安全网络通信，以验证所述分组被适当地发送或接收。 数据模式执行者阻止应用程序或其他软件访问网络上的适配器，以使用适配器进行数据包嗅探或欺骗。 在具体实施例中，数据模式执行者使用值比特向量（其可以是可改变的或可以被预设为包括零的值）来验证第2层适配器级别的分组，计数值和掩码以与 数据包中发现的数据。

公开(公告)号：WO1998008153A2

公开(公告)日：1998-02-26

申请号：PCT/US1997012858

申请日：1997-08-04

Applicant: 3COM CORPORATION

Inventor： 3COM CORPORATION ,  MADISON, Carl, T., Jr. ,  FLATHERS, Richard, C.

IPC: G06F00/00

CPC classification number: H04L41/22 ,  G06F3/1454 ,  H04L41/0253

Abstract: A system for providing a configurable graphical user interface useful in managing network devices connected to a network, the system using one or more servers and one or more clients, each server receiving messages from and sending messages to a set of the network devices via a standard server/device protocol, each client communicating with at least one server via a client/server protocol and providing a graphical user interface for receiving requests from a user and displaying information to the user relating to the network devices, the client initiating a graphical user interface in response to a user input by sending an initiation message to the server, and the server then sending resource information and a data stream relating to the current state of the network devices, the client creating a graphical user interface that provides a display relating to the state of the network devices based upon the resource information and data stream, the resource information providing a context for data in the data stream.

Abstract translation: 一种用于提供用于管理连接到网络的网络设备的可配置图形用户界面的系统，使用一个或多个服务器和一个或多个客户端的系统，每个服务器经由标准接收消息并向一组网络设备发送消息 服务器/设备协议，每个客户端经由客户端/服务器协议与至少一个服务器进行通信，并提供用于从用户接收请求并向用户显示与网络设备有关的信息的图形用户界面，客户端启动图形用户界面 响应于通过向服务器发送启动消息的用户输入，并且服务器然后发送与网络设备的当前状态相关的资源信息和数据流，客户端创建图形用户界面，其提供与 基于资源信息和数据流的网络设备的状态，资源信息提供上下文 用于数据流中的数据。