초록 ▼

An emergency-use-only cellular phone provides for contacting and establishing full duplex voice communication with emergency personnel at an emergency response center with the press of a single activation button. When the activation button is pressed a first time, the following functions are initiat

An emergency-use-only cellular phone provides for contacting and establishing full duplex voice communication with emergency personnel at an emergency response center with the press of a single activation button. When the activation button is pressed a first time, the following functions are initiated: (1) electrical power from a power supply is provided to a cellular transmitter and receiver, (2) the cellular receiver is activated to search for an available channel from among A or B cellular system channels, (3) an emergency telephone number is accessed from memory, and (4) the cellular transmitter is activated to establish communication with the emergency response center. Since all of these functions are initiated by pressing a single activation button, communication with the emergency response center may be established simply and speedily, even under stressful conditions.

대표청구항 ▼

An emergency-use-only cellular phone provides for contacting and establishing full duplex voice communication with emergency personnel at an emergency response center with the press of a single activation button. When the activation button is pressed a first time, the following functions are initiat

An emergency-use-only cellular phone provides for contacting and establishing full duplex voice communication with emergency personnel at an emergency response center with the press of a single activation button. When the activation button is pressed a first time, the following functions are initiated: (1) electrical power from a power supply is provided to a cellular transmitter and receiver, (2) the cellular receiver is activated to search for an available channel from among A or B cellular system channels, (3) an emergency telephone number is accessed from memory, and (4) the cellular transmitter is activated to establish communication with the emergency response center. Since all of these functions are initiated by pressing a single activation button, communication with the emergency response center may be established simply and speedily, even under stressful conditions. , QE-18, 1751-1758, Oct. 1982. "Laser Diode End Fire Coupling into Ti:LiNbO3waveguides," Appl, Optics, 18, 2536-2537, Aug. 1979. "Bow-Tie Surface Emitting Lasers," Bedford, R., Luo, H., Fallahi, M., IEEE Photonics Tech. Let., vol. 12, No. 8, Aug. 2000. "Surface Emitting Distributed Feedback Quantum-Cascade Lasers," Schrenk, W. et al., Applied Physics Letters, vol. 77, No. 14, Oct. 2, 2000. "Analysis of Grating Surface Emitting Lasers," Noll, R.J., Macomber, S.H., IEEE Journal of Quantum Electronics, vol. 26, No. 3, Mar. 1990. "Facetless Bragg Reflector Surface-Emitting A1GaAs/GaAs Lasers Fabricated by Electron-Beam Lithography and Chemically Assisted Ion-Beam Etching," Tiberio, R.C., et al., J. Vac.Sci. Technol. B9 (6), Nov./Dec. 1991. ine; transmitting and receiving information over each subscriber line extending between a shared device and a respective plurality of remote devices using a symbol-based discrete multi-tone transmission scheme utilizing the corresponding subscriber line specific information; and transmitting to each remote device a destination code within a first group of frequency bands and modulated data within a second group of frequency bands different from the first group of frequency bands, wherein bits transmitted in each of the frequency bands in the second group of frequency bands are selected for a subscriber line connected to a remote device having the destination code within the first group frequency band. 2. A method according to claim 1, further comprising the step of assigning each of the remote devices a unique destination code. 3. A method according to claim 2 wherein a destination code is assigned to each remote device dynamically during a communication handshake between each remote device and the shared device. 4. A method according to claim 1 wherein the second group of frequency bands for a remote device is selected during a communication handshake between the remote device and the shared device by probing a subscriber line connected to the remote device to determine data rates that can be supported by the subscriber line at each of a plurality of frequency bands. 5. A method according to claim 1 wherein the shared device is a shared access ADSL modem and wherein each of the remote devices is an ADSL modem. 6. A method according to claim 1 wherein the client specific information is obtained during a communication handshake between the remote device and the shared device by probing a subscriber line connected to the remote device to determine data rates that can be supported by the subscriber line at each of a plurality of frequency bands. 7. A method according to claim 1 wherein each subscriber line is a twisted pair telephone wire. 8. A method according to claim 1, wherein the step of transmitting and receiving further comprises the step of equalizing a received signal from a subscriber line utilizing the subscriber line specific information to provide client specific equalization coefficients. 9. A method according to claim 1, wherein said step of transmitting and receiving further comprises the step of detecting symbols in the frequency domain representation of a signal received from a subscriber line utilizing the subscriber line specific information to provide client specific frequency information which defines the range of symbols encoded for each frequency. 10. A method according to claim 1, wherein said step of transmitting and receiving further comprises the steps of decoding, deinterleaving and descrambling the symbols of a signal received from a subscriber line utilizing the subscriber line specific information. 11. A method according to claim 1, wherein said step of transmitting and receiving further comprises the steps of encoding, interleaving and scrambling the symbols to be transmitted on a subscriber line utilizing the subscriber line specific information. 12. A method according to claim 1, wherein said step of transmitting and receiving further comprises the step of mapping symbols to be transmitted on a subscriber line utilizing the subscriber line specific information. 13. A method of receiving, at a remote device, data transmitted over a subscriber line extending from a shared device using a symbol-based discrete multi-tone transmission scheme, wherein the remote device has a unique destination code assigned thereto, the method comprising the steps of: receiving transmitted first and second groups of frequency bands using a symbol-based discrete multi-tone transmission scheme; examining the transmitted first group of frequency bands using a symbol-based discrete multi-tone transmission scheme for a destination code therewithin; and demodulating modulated data within the second group of frequen