Patent ID: 7050570

Claim:
A communication system comprising a communication apparatus connected to a voice terminal apparatus and an opposite-side communication apparatus connected to an opposite-side voice terminal apparatus, and making said communication apparatus and said opposite-side communication apparatus communicate with each other through a communication channel, wherein said communication apparatus comprises: a voice coding unit for code-compressing a voice signal from said voice terminal apparatus and thereby generating voice information, a DTMF detecting unit for detecting a DTMF signal from a voice signal from said voice terminal apparatus, a DTMF coding unit for, when said DTMF detecting unit has detected a DTMF signal, generating DTMF information by coding a DTMF signal into a DTMF signal transmission form, and an information outputting unit for outputting voice information generated by said voice coding unit and/or DTMF information generated by said DTMF coding unit to said communication channel.