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公开(公告)号：US5134611A
公开(公告)日：1992-07-28
申请号：US252202
申请日：1988-09-30
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。
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公开(公告)号：US06285680B1
公开(公告)日：2001-09-04
申请号：US08826193
申请日：1997-03-27
IPC分类号： H04L1228
CPC分类号： H04L12/2874 , H04L12/2856 , H04L12/5692 , H04L29/06 , H04L69/08 , H04Q11/0435
摘要： A central site communication system selectively establishes a data connection between a remote system and one of group of host systems as a function of information about the remote system. The communication system can be connected to a digital data network such as via an ISDN or T1 network connection and the remote system can be connected to either the digital data network directly or through a Public Switch Telephone Network (PSTN) analog connection. The host system can be connect to the communication system via a LAN medium and utilize an IP network and a data tunneling protocol to establish a data connection between the remote system and the host system. The information about the remote system can include the telephone number of the remote system, the telephone number dialed by the remote system to connect with host system, the protocol used by the remote system or the data transmitted by the remote system to the host system.
摘要翻译： 中央站点通信系统根据关于远程系统的信息有选择地建立远程系统与一组主机系统之间的数据连接。 通信系统可以连接到数字数据网络，例如通过ISDN或T1网络连接，并且远程系统可以直接或通过公共交换电话网（PSTN）模拟连接连接到数字数据网络。 主机系统可以通过LAN介质连接到通信系统，并利用IP网络和数据隧道协议在远程系统和主机系统之间建立数据连接。 关于远程系统的信息可以包括远程系统的电话号码，由远程系统拨打的与主机系统连接的电话号码，远程系统使用的协议或由远程系统发送到主机系统的数据。
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公开(公告)号：US6122287A
公开(公告)日：2000-09-19
申请号：US599183
申请日：1996-02-09
摘要： In order to transfer data via a switched network that provides a wide range of network services, the users must establish a circuit or network connection and establish a data link connection. The circuit or network connection provides the physical connection between the users and data link connection provides the protocols and procedures for the transfer of data. Because the network provides a wide range of services, the users, typically by prior agreement, designate a common data link protocol to facilitate the transfer of data. A data link connection will not be established if the users are not using the same data link protocol. A method and apparatus are disclosed which permit a local system to detect the data link protocol used by a remote system. The invention provides a method for detecting the data link protocol used by the remote system when the remote system initiates the data link setup and a method for detecting the data link protocol when the local system initiates the data link setup.
摘要翻译： 为了通过提供广泛网络服务的交换网络传输数据，用户必须建立电路或网络连接并建立数据链路连接。 电路或网络连接提供了用户之间的物理连接，数据链路连接提供了传输数据的协议和过程。 因为网络提供了广泛的服务，所以通常通过事先约定的用户指定一个通用的数据链路协议来促进数据的传输。 如果用户不使用相同的数据链路协议，则不会建立数据链路连接。 公开了一种允许本地系统检测由远程系统使用的数据链路协议的方法和装置。 本发明提供了一种当远程系统启动数据链路建立时用于检测由远程系统使用的数据链路协议的方法，以及当本地系统启动数据链路建立时检测数据链路协议的方法。
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公开(公告)号：US4901277A
公开(公告)日：1990-02-13
申请号：US144756
申请日：1988-01-19
CPC分类号： H04L47/10 , G06F5/06 , G06F2205/061
摘要： Data flow in a communications network is controlled by a downstream node specifying the maximum average speeds of a plurality of data streams sent from an upstream node on a plurality of data paths.
摘要翻译： 通信网络中的数据流由下游节点控制，下游节点指定从多个数据路径上的上游节点发送的多个数据流的最大平均速度。
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