公开(公告)号：US5134611A

公开(公告)日：1992-07-28

申请号：US252202

申请日：1988-09-30

申请人： Bradford R. Steinka ,  Gary B. Videlock ,  Eugene Y. G. Chang

发明人： Bradford R. Steinka ,  Gary B. Videlock ,  Eugene Y. G. Chang

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。