Patent ID: 9398174
Filing Date: 2016-07-19
CPC Classification: H04N

Claim Text:
1. A communication apparatus connectable to a telephone network, comprising: a network connecting section configured to operate by using operational power and connected to the telephone network to perform transmission and reception of signals through the telephone network; a main power supply configured to supply a supply target including the network connecting section with the operational power; a backup power supply that is provided separately from the main power supply and that is configured to supply backup power of a particular voltage; a network-event detector configured to detect an electrical change in the telephone network as a network event; a normal-mode setter configured to set an operational mode to a normal mode when the network-event detector detects the network event in a state where the operational mode is in a stopped mode, the normal mode being the operational mode in which the operational power is supplied from the main power supply to the network connecting section, the stopped mode being the operational mode in which supply of the operational power to the network connecting section is stopped, where the network-event detector and the normal-mode setter are configured to operate by using the backup power supplied from the backup power supply when the operational mode is in the stopped mode; and an operational-signal outputting section configured to receive an input operation for starting up or stopping the communication apparatus and configured to output, to the normal-mode setter, an operational signal indicating that the input operation is received, wherein the operational-signal outputting section is configured to operate by using the backup power supplied from the backup power supply when the operational mode is in the stopped mode; wherein the normal-mode setter is configured to set the operational mode to the normal mode when the operational signal is inputted in a state where the operational mode is in the stopped mode, and wherein, upon detecting the network event, the network-event detector is configured to generate the operational signal and to output the operational signal to the normal-mode setter, wherein the communication apparatus further comprises: an operational-signal cut-off section configured to prevent the network-event detector from outputting the operational signal to the normal-mode setter when the operational mode is in the normal mode.