Importance

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Abstract

A communication (comm) system is disclosed which comprises a master comm apparatus (app) coupled to a comm line and at least a slave comm app communicating with the master comm app and the comm line using wireless comm, the master comm app including: a detection portion for detecting a disconnection between the master comm app and the comm line and between the master comm app and the slave comm app and detecting a cause of the disconnection; a data generation portion responsive to the detection portion for generating logging data according to the disconnection and the cause; a memory for storing the logging data from the data generation portion; and a reading portion for reading the logging data from the memory in response to a request. The logging data is transmitted to the telephone line or a maintenance terminal wire-less communicated with the master comm app in response to a data transmission request. When one of slave comm app requests a forwarding, the slave comm app sends a forwarding request and data of a cause of disconnection caused by the forwarding and the master comm app generates first logging data including the data of cause of disconnection and after completion of the comm (fax) operation caused by the forwarding and generates second logging data in response to the disconnection from the telephone line.

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First Claim