Patent ID: 8565291
Filing Date: 2013-10-22
Classification: H04L,H04M

Abstract:
1. A communication apparatus for executing half-duplex data communication conforming to V.34 recommendation, transmitting an INFO 0c , sequence signal, and communicating with an answering communication apparatus that transmits an INFO 0a , sequence signal, a Tone A signal, a Tone A phase reversal signal, and an INFO h , sequence the communication apparatus comprising: a modulation-demodulation device to modulate and demodulate data conforming to V.34 recommendation; a control device to determine that the communication procedure shift to a recovery procedure by receiving the INFO a circuit to receive the command from the control device through the modulation-demodulation device, and cause the communication procedure conforming to V.34 recommendation to return to a predetermined state in Phase 2 based on the command from the control device after the recovery procedure is stopped.