Network terminal, method for controlling the same, and network system

摘要

A network terminal includes: an oscillator circuit; a communication processing unit which transmits and receives communication data through a transmission path, using the clock; a controller unit which controls a function of the network terminal, using the clock; a clock control unit which causes the oscillator circuit to start or stop oscillating, and supply the clock; and a signal detecting unit which monitors a wave detection signal communicated through the transmission path in the case where the communication processing unit is not operating, and generates an activation signal according to which the clock control unit causes the oscillator circuit to start oscillating at a time when the wave detection signal exceeds a threshold value. The signal detecting unit is operable without using the clock, and the controller unit switches a detectable wave detection signal by changing a circuit constant of the signal detecting unit.

主权项

1. A network terminal which performs communication through a transmission path, comprising:
an oscillator circuit which generates a clock; a communication processing unit configured to transmit and receive communication data through the transmission path, using the clock; a controller unit configured to control a function of the network terminal, using the clock; a clock control unit configured to cause the oscillator circuit to start or stop oscillating, and supply the clock generated by the oscillator circuit to the communication processing unit and the controller unit; and a signal detecting unit configured to monitor a wave detection signal communicated through the transmission path in a case where the communication processing unit is not operating, and generate an activation signal according to which the clock control unit causes the oscillator circuit to start oscillating at a time when the wave detection signal exceeds a threshold value, wherein the signal detecting unit is configured with a circuit operable without using the clock, and the controller unit is configured to switch a wave detection signal detectable by the signal detecting unit, by changing a circuit constant of the signal detecting unit.