US 5,146,598 A · Communication terminal apparatus having an interrupt/restart function with time measuring control for interruption and disabling feature

Abstract

When a no-communication state is detected for a predetermined time of time during communication in response to an interrupt designation to or from an apparatus on the other end of the line, an operation of a time monitoring timer for terminating the communication is interrupted. The time monitoring timer is restarted in response to a restart designation. Therefore, communication can be continued without interrupting an interrupt/restart service provided by, e.g., an ISDN due to a time-out error. When a trouble which disables communication occurs during communication, an interrupt service is requested to a network. When the trouble which disables communication is recovered, a restart service can be requested to the network. In this case, communication can be normally restarted without being accidentally terminated intermediately.

Claims8

Dependent claims

A communication terminal apparatus connected to an integrated services digital network (ISDN) having an interrupt/restart function, comprising:

communication means for performing data communication with a communication apparatus on another end of a line via the ISDN;
time measuring means for measuring a time period during which said communication means is initially interrupted to communicate with the communicate apparatus on the other end;
communication termination means for terminating the communication of said communication means with the communication apparatus on the other end when the time period measured by said time measuring means reaches a predetermined value;
interrupt command detection means for detecting a subsequent communication interrupt command from the ISDN while the communication between said communication means and the communication apparatus on the other end is interrupted;
and
control means for controlling said time measuring means to stop its time measuring operation in order to disable said communication termination means when said interrupt command detection means detects a subsequent communication interrupt command from the ISDN.

3 more elements

A communication terminal apparatus connected to an integrated services digital network (ISDN) having an interrupt/restart function, comprising:

communication means for performing data communication with a communication apparatus on another end of a line via the ISDN;
time measuring means for measuring a time period during which said communication means is initially interrupted to communicate with the communication apparatus on the other end;
communication termination means for terminating the communication of said communication means with the communication apparatus on the other end when the time period measured by said time measuring means reaches a predetermined value;
interrupt command detection means for detecting a subsequent communication interrupt command to be sent to the ISDN during the interruption of the communication with the communication apparatus on the other end;
and
control means for controlling said time measuring means to stop its time measuring operation in order to disable said communication termination means when said interrupt command detection means detects a subsequent communication interrupt command to be sent to the ISDN.

3 more elements

Dependencies are inferred from the claim text.

Communication terminal apparatus having an interrupt/restart function with time measuring control for interruption and disabling feature

Life of this patent

Communication terminal apparatus having an interrupt/restart function with time measuring control for interruption and disabling feature

Life of this patent

Abstract

Claims8