Method of protecting multimedia unit against abnormal conditions and protection system therefor

摘要

A protection system includes a multimedia unit, which is able to output a warning signal under an abnormal condition thereof and to restart on receipt of a restart signal, in which a phone number message for identifying a source of the restart signal is included; Ethernet for transmitting the warning signal output by the multimedia unit; a phoneline network for transmitting the restart signal to the multimedia unit; a supervising unit for receiving the warning signal sent via Ethernet and then outputting the restart signal via the phoneline network; and a filter unit located between the multimedia unit and the phoneline network for receiving the restart signal via the phoneline network, and being internally provided with a list of phones containing the phone number message included in the restart signal for determining whether to transmit the restart signal to the multimedia unit according to the source of the restart signal.