Wireless data communication system using a microphone/headphone jack of a portable phone

A wireless data communication system, comprising:

• an electrically conducting cable comprised of a first electrical conductor and a second electrical conductor, with a first terminal of said first electrical conductor being plug coupleable to an external side of a microphone port of a microprocessor driven appliance, with a first terminal of said second electrical conductor being plug coupleable to an external side of a headphone port of the appliance, and with second terminals of said first electrical conductor and said second electrical conductor being plug coupleable to an external side of a microphone/headphone port of a wireless telephone;
• a differential amplifier generating a first data signal based upon differentials occurring between input ports of said differential amplifier connectable across two discrete output terminals of a modem providing data communication with the microprocessor driven appliance;
• a regulator connected to said differential amplifier to provide a first regulated signal by modifying gain of said first data signal;
• a transmission buffer connectable to transmit said first regulated signal to an internal side of the microphone port;
• a reception buffer connectable to receive a data signal to an internal side of the headphone port;
• and
• a gain modulator connected to provide a second regulated signal to a receiver port of the modem by modulating gain of said data signal.

A wireless data communication system, comprising:

• a computer having a microphone jack, a headphone jack, a modem and an interface module, wherein said interface module transmits electrical signals between said microphone jack and said modem, and between said headphone jack and said modem;
• said interface module comprising:
• a differential amplifier connected to said modem;
• a transmission gain regulator connected to said differential amplifier;
• a transmission matching stage connecting said transmission gain regulator to said microphone jack;
• a reception matching stage attached to said discrete headphone jack;
• and
• a reception gain regulator connecting said reception matching means to said modem;
• and
• a cable for coupling said microphone jack and headphone jack of said computer to a microphone/headphone jack of a portable telephone.

A wireless data communication system, comprising:

• a computer modem providing a transmission port, a reception port, and a dedicated modem port;
• a microphone jack exposed through a first port of a portable computer;
• a headphone jack exposed through a second port of the portable computer;
• an interface module transmitting data signals by operationally connecting said transmission port and a reception port of said computer modem to different ones of said microphone jack and said headphone jack, said interface module comprising:
• a differential amplifier connected to said transmission port of said computer modem;
• a first amplifier connecting said differential amplifier to said microphone jack;
• a second amplifier coupling said headphone jack to said reception port of said computer modem;
• and
• a cable operationally coupling said microphone jack and said headphone jack to a microphone/headphone jack of a portable telephone.