COMMUNICATION TERMINAL DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a communication terminal device which realizes a standby mode with low power consumption and also can correspond to each service offered by a communication provider. SOLUTION: A calling signal detecting part 11 detects a calling signal from a telephone line network, a power supply controlling part 70 makes a main power supply 83 feed power to perform return from the standby mode, and responds to the calling signal while the operation of a G3 substrate 20 being a part of a substrate is possible due to the return.