Telephone apparatus for transferring a cellular phone call to a home phone and making a cellular phone call by a home phone

A telephone apparatus which can transfer a first phone call from a Bluetooth enabled cellular phone to a home phone and, make a second cellular phone call from the home phone via a Bluetooth enabled cellular phone, comprising;

• a Bluetooth enabled integrated chip (IC) comprising;
• a Bluetooth modem configured for receiving a Bluetooth signal from a Bluetooth radio frequency (RF) antenna of the cellular phone;
• a central processing unit (CPU) built-in the IC, for switching controlling of transferring between the first phone call and the second phone call, the CPU comprising a buffer, and
• a digital signal processor (DSP) and a CODEC built-in the IC;
• wherein a received Bluetooth signal is processed into speech and, vice-versa, speech is processed into a Bluetooth signal by the built-in DSP and CODEC in the Bluetooth IC by DSP processing;
• dual tone multiple frequency (DTMF) dialing tone, Caller ID frequency shift keying (FSK) signal, call waiting channel associated signaling (CAS) tone, call progress tone are also generated and decoded or detected by the built-in DSP by DSP processing, and when DTMF is detected, the detected DTMF signal is muted and the cell phone receives a signal of zero voice level from the Bluetooth IC, and the CPU sends a dialing instruction to the cellular phone to directly dial a same DTMF tone from the cell phone;
• and the DSP firstly checks a power level and twist of DTMF, then checks a frequency of DTMF to see if a match of preset frequencies is detected, and then checks a duration of DTMF to see if the duration is more than a preset value;
• wherein all the above functions are all processed by the CPU software and DSP software programming which the CPU and DSP and CODEC are all embedded in one single IC chip.