Patent ID: 8577020
Filing Date: 2013-11-05
Classification: H04M,H04N

Abstract:
1. A communication terminal apparatus connected to a single telephone line and is configured to be selectively connected either to a telephone set for voice communication or to a facsimile machine for facsimile communication, the communication terminal apparatus comprising: a pseudo ring back tone generator that generates a pseudo ring back tone, the pseudo ring back tone being periodically repeated and transmitted to a calling party in response to an incoming call; a pseudo ring signal generator that generates a pseudo ring signal for driving a ringer of the telephone set to ring in response to the incoming call; a tone detector that detects a CNG signal indicative that the incoming call is a facsimile; a controller that controls at least said pseudo ring back tone generator and said pseudo ring signal generator; a table that includes information correlating OFF times of a plurality of ring back tones with corresponding countries; wherein if the controller judges an OFF time of a ring back tone for a country to be less than a period of a CNG signal by referring to the table, said controller sets the period of the CNG signal as the OFF time of the pseudo ring back tone to said pseudo ring back tone generator and causes said pseudo ring back tone generator to transmit the pseudo ring back tone.