公开(公告)号：US5148353A

公开(公告)日：1992-09-15

申请号：US807961

申请日：1991-12-10

申请人： Stuart K. Morgan ,  Lawrence Bibeau ,  Michael Romm ,  Gary V. Vacon ,  John A. Visser

发明人： Stuart K. Morgan ,  Lawrence Bibeau ,  Michael Romm ,  Gary V. Vacon ,  John A. Visser

IPC分类号： G06F1/18 ,  H05K7/18

CPC分类号： H05K7/186 ,  G06F1/183 ,  Y10S439/928

摘要： A mounting system for the installation of communication termination blocks and communication boxes ("system blocks") on a backplane substantially reduces space requirements for a communications center. The system includes a system block that quickly and removably mounts to a slot in a track. A locking slide either automatically or manually engages the block to hold it securely in place, both mechanically and electrically. Lifting the locking slide releases the block. The block includes an elongated hook that provides lateral support for the block during installation and removal to ensure proper mating of electrical conductors.

摘要翻译： 用于在背板上安装通信终端块和通信盒（“系统块”）的安装系统大大减少了通信中心的空间要求。 该系统包括一个快速可拆卸地安装在轨道上的槽中的系统块。 锁定滑块自动或手动接合块，以将其牢固地固定在原位，机械和电气。 提起锁定滑块释放块。 该块包括细长钩，其在安装和拆卸期间为块提供横向支撑，以确保电导体的适当配合。

公开(公告)号：US5227778A

公开(公告)日：1993-07-13

申请号：US681552

申请日：1991-04-05

申请人： Gary V. Vacon ,  John A. Visser

发明人： Gary V. Vacon ,  John A. Visser

IPC分类号： H04L29/06 ,  H04L29/08 ,  H04L29/12

CPC分类号： H04L67/16 ,  H04L29/12113 ,  H04L29/12811 ,  H04L61/1541 ,  H04L61/6009

摘要： A data communications network having a number of servers and a number of service providers employs an improved protocol for translating service names to network addresses. A server sends a multi-cast message to all service providers requesting a service needed by one of the user terminals connected to this server. In the request, the service is identified by function, rather than by address. Any node which provides this service, receiving the request and able to reply, sends a reply message immediately to the server. The reply message identifies the node (service provider) by network address, so a transaction with this provider can be initiated by the server immediately. If the service provider cannot reply, a third party node can send a reply to identify the provider by address. If the server does not receive a reply from either the provider or a third party, then a cache of network addresses of services most recently used by the server is searched for this particular service. The cache may include a separate local cache for each user terminal connected to this server, with each local cache containing the service and address for the last-used service for one of the user terminals. In addition, a secondary cache is maintained for all items replaced in the local caches when they are updated. When the cache is searched (both local and secondary), if the service address is found, a transaction is begun immediately by the server to utilize the service. If not found in the cache, the server waits for a service advertisement to appear on the network, and obtains the network address of the provider from the advertisement.

摘要翻译： 具有多个服务器和多个服务提供商的数据通信网络采用改进的协议来将服务名称翻译成网络地址。 服务器向所有服务提供商发送多播消息，请求连接到该服务器的用户终端之一所需的服务。 在请求中，服务由功能标识，而不是地址。 提供此服务的任何节点，接收请求并能够回复，立即向服务器发送回复消息。 回复消息通过网络地址来标识节点（服务提供商），所以与服务提供者的交易可以由服务器立即启动。 如果服务提供商无法回复，则第三方节点可以发送回复，以按地址标识提供商。 如果服务器没有收到来自提供商或第三方的回复，则搜索服务器最近使用的服务的网络地址的缓存，以搜索该特定服务。 高速缓存可以包括连接到该服务器的每个用户终端的单独的本地高速缓存，每个本地高速缓存包含用于一个用户终端的最后使用的服务的服务和地址。 此外，当本地缓存更新时，为所有替换的项目维护二级缓存。 当搜索缓存（本地和次要）时，如果找到服务地址，服务器立即开始事务以利用该服务。 如果没有在缓存中找到，服务器等待服务广告出现在网络上，并从广告中获取提供商的网络地址。