Patent ID: 7142519

Claim:
A system for transmitting modem data between a modem in a computer and a telephone line, the system comprising: a mobile unit connected to the modem, said mobile unit having an identification value and including: means for receiving modem data from and providing modem data to the modem; a radio frequency transceiver connected to said mobile unit means for receiving and providing modem data for transmitting and receiving modem data over a radio frequency channel; means connected to said mobile unit radio frequency transceiver for providing and receiving command information over said radio frequency channel; and means connected to said mobile unit command information means for performing operations responsive to received command information; and a base unit connected to the telephone line, said base unit having an identification value and including: means for receiving modem data from and providing modem data to the telephone line; a radio frequency transceiver connected to said base unit means for receiving and providing modem data for transmitting and receiving modem data over a radio frequency channel, said base unit radio frequency transceiver operating with said mobile unit radio frequency transceiver; means connected to said base unit radio frequency transceiver for providing and receiving command information over said radio frequency channel; and means connected to said base unit command information means for performing operations responsive to received command information, wherein command information provided by said mobile unit command information means and said base unit command information means includes said mobile unit identification value and said base unit identification value and wherein said mobile unit means for performing operations operates only if said received command information includes the identification value of said mobile unit.