Patent ID: 6487173
Filing Date: 2002-11-26
Classification: H04L

Abstract:
A network system in which a first communication device and a second communication device are connected through a communication line,the first communication device comprising: detection means for detecting a device failure caused in the first communication device; notification means for generating device failure information about the device failure detected by the detection means and transmitting the device failure information to the second communication device; and the second communication device comprising: receiving means for receiving the device failure information from the first communication device; memory means for memorizing the device failure information received by the receiving means; and display control means for displaying a failure alarm and the device failure information memorized in the memory means, wherein the detection means detects that a registration of the communication line connecting the first communication device and the second communication device will be canceled by an operator as the device failure, and the notification means transmits the device failure information before the registration is canceled.