公开(公告)号：US07313816B2

公开(公告)日：2007-12-25

申请号：US10022578

申请日：2001-12-17

申请人： Bhaskar Sinha ,  Ravigopal Vennelakanti ,  Goplnath Rebala

发明人： Bhaskar Sinha ,  Ravigopal Vennelakanti ,  Goplnath Rebala

IPC分类号： H04L9/32

CPC分类号： H04L63/0428 ,  H04L9/083 ,  H04L9/3213 ,  H04L63/062 ,  H04L63/0807 ,  H04L63/102

摘要： A system and method for authenticating a client having a privilege server, a head end server, and a web adapter performs the steps of negotiating an authentication scheme between the server proxy and the privilege server. User information is presented to the web adapter. The user information is provided to the head end server and in turn presents the information to the web adapter. The user is validated in accordance with the authentication scheme. When the user is validated a ticket is generated for the user. The ticket is presented to the client privilege server proxy that decrypts the ticket. A token is formed from the ticket and the client user identification. The token from the client is provided to the privilege server. A packet is formed having a sequence number and session key encrypted with the ticket. The packet is provided to the head end server which in turn authenticates the user. The packet is provided to the client privilege proxy which decrypts the packet and sends the ticket and the sequence number encrypted with the session key to the data server through the web adapter. User is validated at the data server and privileges are granted thereto.

摘要翻译： 用于认证具有特权服务器，头端服务器和web适配器的客户端的系统和方法执行在服务器代理和特权服务器之间协商认证方案的步骤。 用户信息被呈现给Web适配器。 将用户信息提供给头端服务器，并将信息呈现给web适配器。 用户根据认证方案进行验证。 当用户被验证时，为用户生成故障单。 将票证提交给解密票证的客户端特权服务器代理。 令牌是从票证和客户端用户标识形成的。 来自客户端的令牌被提供给特权服务器。 形成具有使用票证加密的序列号和会话密钥的分组。 该分组被提供给头端服务器，后端认证用户。 该分组被提供给客户端特权代理，该代理对数据包进行解密，并通过web适配器将会话密钥和用会话密钥加密的序列号发送到数据服务器。 用户在数据服务器上进行验证，并授予其权限。

公开(公告)号：US5357609A

公开(公告)日：1994-10-18

申请号：US858319

申请日：1992-03-25

申请人： Robert E. Sellers ,  Gary D. Alford

发明人： Robert E. Sellers ,  Gary D. Alford

IPC分类号： H04B3/20 ,  G06F13/38

CPC分类号： H04B3/20

摘要： An embodiment of the present invention is a site controller that comprises a microcomputer with a RAM for main memory and an EPROM for program memory, an interface for accepting RS-485 data and voice communication on respective differential wire pairs from a daisy chain of student response keypad terminals, a public telephone data access arrangement with hybrid for sending and receiving voice over a dial-up line, a universal asynchronous receiver-transmitter for data communication by modem with a remote host site via an X.25 PAD and an audio processor for half-duplex communication between an instructor and a student that has voltage controlled amplifiers and side chain devices that reduce audio amplifier gain during periods of silence in order to eliminate feedback howl and adjustable delay and threshold devices for gating the respective channels through in the half-duplex mode.

摘要翻译： 本发明的实施例是一种现场控制器，其包括具有用于主存储器的RAM和用于程序存储器的EPROM的微型计算机，用于接收来自学生响应的菊花链的相应差分线对上的RS-485数据和语音通信的接口 键盘终端，用于通过拨号线路发送和接收语音的混合的公共电话数据访问装置，用于通过X.25 PAD的调制解调器与远程主机站点进行数据通信的通用异步接收机 - 发射机，以及用于 讲师和具有电压控制放大器和侧链装置的学生之间的半双工通信，其在静默期间减少音频放大器增益，以消除在半衰期期间门控各个通道的反馈嚎叫和可调延迟和阈值装置， 双工模式。

公开(公告)号：US5329620A

公开(公告)日：1994-07-12

申请号：US858318

申请日：1992-03-25

申请人： Gary D. Alford ,  Robert E. Sellers

发明人： Gary D. Alford ,  Robert E. Sellers

IPC分类号： G09B5/14 ,  G06F13/00

CPC分类号： G09B5/14

摘要： A daisy chain voice-data terminal for communicating data and voice signals between remote locations, comprising, according to an embodiment of the present invention, a microcomputer with a RAM for main memory and an EPROM for program memory, a membrane keypad connected to an input port of the microcomputer, a liquid crystal display adjacent to the keypad and connected to an output port of the microcomputer, a microphone and preamplifier, a differential output audio amplifier, a relay controlled by the microcomputer to switch the differential output audio amplifier on and off a daisy chain cable connected to other response keypads and a site controller, an RS-485 serial input/output to interface the microcomputer to the daisy chain cable, a switching regulator to provide five volts to the logic circuits, and a separate three-terminal linear regulator to supply five volts to the audio circuits. At each response keypad, the wiring for the audio channel is cross connected to balance out any noise that may be otherwise induced in the audio signal.

摘要翻译： 一种用于在远程位置之间传送数据和语音信号的菊花链语音数据终端，包括：根据本发明的实施例，具有用于主存储器的RAM和用于程序存储器的EPROM的微型计算机，连接到输入端的膜键盘 微型计算机端口，与键盘相邻并连接到微计算机的输出端口的液晶显示器，麦克风和前置放大器，差分输出音频放大器，由微型计算机控制的继电器，以打开和关闭差分输出音频放大器 连接到其他响应键盘的菊花链电缆和现场控制器，RS-485串行输入/输出将微型计算机连接到菊花链电缆，开关稳压器为逻辑电路提供5伏特，以及单独的三端子 线性稳压器为音频电路提供五伏特。 在每个响应键盘上，音频通道的布线交叉连接，以平衡音频信号中可能会引起的任何噪音。

公开(公告)号：US5303042A

公开(公告)日：1994-04-12

申请号：US858321

申请日：1992-03-25

申请人： Howard S. Lewis ,  Steve R. Falcon ,  Jimmy Soetarman ,  John A. Roberts, III ,  Yean W. Chan ,  Richard M. Hartman

发明人： Howard S. Lewis ,  Steve R. Falcon ,  Jimmy Soetarman ,  John A. Roberts, III ,  Yean W. Chan ,  Richard M. Hartman

IPC分类号： G09B5/14 ,  G09B7/04 ,  G09B7/073 ,  H04N7/173 ,  H04N7/15

CPC分类号： H04N7/17309 ,  G09B5/14 ,  G09B7/04 ,  G09B7/073

摘要： An apparatus of the present invention includes a viewer response system comprising a host site and at least one remote site interconnected by a satellite channel for host-to-remote video, an X.25 communications channel for message exchanges establishing a virtual circuit between each remote and the host site, and a dial-up public phone network channel that allows the host site to dial a remote site in response to a person at the remote site wanting to speak on the system to another person at the host site. A touch screen monitor at the host site allows the other person to sequence through electronic notecards that function as presentation cue cards. Questions can be formatted on remote site monitors and keypad terminals for each person at each remote site to allow real-time responses to be entered. A computer supporting the host site computes and displays remote site status and person's responses.

摘要翻译： 本发明的装置包括一个观众响应系统，包括一个主机站点和至少一个由用于主机到远程视频的卫星信道互连的远程站点，一个用于消息交换的X.25通信信道，在每个远端之间建立虚拟电路 和主机站点以及拨号公用电话网络频道，其允许主机站点响应远程站点上想要在主机站点上向另一个人说话的远程站点的人员拨打远程站点。 在主机站点的触摸屏监视器允许另一个人通过用作演示提示卡的电子名片进行排序。 可以在远程站点监视器和键盘终端上为每个远程站点的每个人格式化问题，以允许输入实时响应。 支持主机站点的计算机可以计算和显示远程站点状态和人员的响应。