Patent ID: 7643622

Claim:
A communication device enabling a voice communication with another communication device connected to a communication circuit network, comprising: a calling signal detection system that detects whether a calling signal is received from the other communication device via the communication circuit network; a communication starting operation receiving system configured to receive a communication starting operation performed by a user after the calling signal detection system detects the calling signal from the other communication device; a circuit closing system configured to close a circuit connecting the communication device and the other communication device when the communication starting operation receiving system receives the communication starting operation performed by the user after the calling signal detection system detects the calling signal from the other communication device; a state detection system that detects whether the calling signal being received is currently in an ON state or an OFF state; and a standby control system that controls the circuit closing system to await closing the circuit until the state detection system detects the OFF state of the calling signal being received if the state detection system detected the ON state of the calling signal being received after the communication starting operation receiving system received the communication starting operation performed by the user.