Patent ID: 8452487

Claim:
A malfunction informing system comprising: a malfunction informing apparatus that includes: a connection history write section that writes connection history into a history memory section on the basis of reception of data from a source transmission apparatus via a communication line, the connection history showing that the source transmission apparatus has been connected to the communication line; a communication interruption determining section that determines whether or not communication is interrupted, on the basis of conditions of data reception via the communication line, for the source transmission apparatus of which at least the connection history is stored in the history memory section; and a malfunction informing section that informs of abnormality in conditions of connection with the source transmission apparatus via the communication line, when the communication interruption determining section determines that communication is interrupted, and a reporting apparatus that reports a malfunction on the basis of information given by the malfunction informing apparatus; wherein the system further comprises a source transmission memory section that stores in advance source transmission apparatus information; and the malfunction informing section of the malfunction informing apparatus informs the reporting apparatus of abnormality in conditions of connection with the source transmission apparatus via the communication line, when source transmission apparatus information is stored in the source transmission memory section but connection history of the source transmission apparatus is not stored in the history memory section.