Patent ID: 6577715
Filing Date: 2003-06-10
Classification: H04N

Abstract:
A communication apparatus at a calling side for performing transmission and reception of a signal with another communication apparatus at an answering side, the communication apparatus comprising:a calling transmitter that transmits signals specified in a predetermined Recommendation; a calling receiver that receives signals transmitted from the communication apparatus at the answering side; a calling detector that detects the signals received by said calling receiver while said calling transmitter transmits CM signals specified in Recommendation V.8; and a controller that performs a communication procedure, at the calling side, specified in Recommendation V.34 when said calling detector detects JM signals specified in Recommendation V.8, performs a communication procedure, at the calling side, specified in Recommendation T.30 when said calling detector detects DIS signals specified in Recommendation T.30 and performs a communication procedure, at the calling side, specified in Recommendation V.22/V.22bis when said calling detector detects USB1 signals specified in Recommendation V.22/V.22bis.