Text Processing Terminal Interface With Public Data Networks
Original Publication Date: 1983-May-01
Included in the Prior Art Database: 2005-Feb-07
Communication between data processing terminals and/or word processingterminals can be achieved through X.2l Public Data Networks, such as DDX in Japan and Nordic Network in Europe. In order for a given terminal to access the X.21 Public Data Network, a connection between the given terminals and the network has to be established using selected X.21 protocols. Because of short-term network problems, it is common that calls made from one terminal to another terminal may fail to go through on one or more attempts. In such a case, it would be advantageous to have an automatic retry for each failed call until the call is achieved so as to minimize operator intervention at the calling terminal. Unfortunately, the maximum number of retries permitted and the minimum time that must elapse between retries is different for each X.