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1. 发明授权

US5497460A System and method for determining network connectivity 失效
标题翻译：确定网络连通性的系统和方法
公开(公告)号：US5497460A
公开(公告)日：1996-03-05
申请号：US262197
申请日：1994-06-20
申请人： Warren D. Bailey , Erik L. Dixon , Michele M. Ferris , Henry M. Garrett , Gregory F. Paussa , Anthony D. Walker
发明人： Warren D. Bailey , Erik L. Dixon , Michele M. Ferris , Henry M. Garrett , Gregory F. Paussa , Anthony D. Walker
IPC分类号： H04L29/04 , H04L12/56 , H04L29/06 , H04L29/08 , G06F11/34
CPC分类号： H04L49/9063 , H04L49/90 , H04L69/18 , H04L69/323
摘要： A system (such as a multiprotocol LAN adapter) for use in a workstation or other processing machine automatically determines the type of network to which the workstation is connected and for automatically determines the type of physical medium to which the workstation is attached. The system has a plurality of different physical ports for supporting various available physical media over which network data may be transmitted. For example, the system may have a port for connecting to shielded twisted pair (STP) wiring, a port for connecting to unshielded twisted pair (UTP) wiring, a port for connecting to coaxial cable, and a port for supporting the Attachment Unit Interface (AUI). Connected to each of these physical ports are various network interface devices for supporting the various available networking protocols, e.g., token ring, Ethernet, etc. Logic circuitry and control software are connected to the network interface devices. In order to determine the valid network connections to the individual ports, a short interrogation frame is successively transmitted by each of the network interface devices to each of the ports. Depending upon the status of each transmission, the system determines what type of network (if any) is connected to and by which type of physical medium. Based upon these two determinations, the workstation can be automatically configured without user intervention.
摘要翻译：用于工作站或其他处理机器的系统（例如多协议LAN适配器）自动确定工作站所连接的网络类型，并自动确定工作站连接到的物理介质的类型。该系统具有多个不同的物理端口，用于支持各种可用的物理介质，通过该物理介质可以发送网络数据。例如，系统可以具有用于连接到屏蔽双绞线（STP）接线的端口，用于连接到非屏蔽双绞线（UTP）接线的端口，用于连接到同轴电缆的端口以及用于支持附接单元接口（AUI）。连接到这些物理端口中的每一个的各种网络接口设备用于支持各种可用的网络协议，例如令牌环，以太网等。逻辑电路和控制软件连接到网络接口设备。为了确定到各个端口的有效网络连接，每个网络接口设备连续地向每个端口发送短询问帧。根据每个传输的状态，系统确定哪种类型的网络（如果有）连接到哪种类型的物理介质。基于这两个确定，工作站可以自动配置，无需用户干预。

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