Portable securities selector system
Precessing display pager
Hand-held interactive terminal
Electric power generating apparatus
ApplicationNo. 510732 filed on 08/03/1995
US Classes:455/466, Auxiliary data signaling (e.g., short message service (SMS))455/127.4, Dual mode (e.g., analog and digital)455/553.1Radiotelephone having plural transceivers (e.g., for analog and digital, trunking and cellular, etc.)
ExaminersPrimary: Bost, Dwayne D.
Assistant: Wyche, Myron K.
Attorney, Agent or Firm
Foreign Patent References
International ClassH04Q 011/04
AbstractA portable radio telephone handset includes the capability of operating as a data transfer terminal as well as an analog cellular telephone subscriber station. Two modes of operation are available in the handset, and a analog cellular communication mode and a Cellular Digital Packet Data (CDPD) mode. A controlled processor in the handset is used to program the power supply to follow a prioritized, high efficiency operating cycle, preferably tracking CDPD active/sleep mode duty cycle. The power supply has the capability of providing 120 volts AC output for other communication systems. The availability of 120 volts output is programmed to track the functions of the CDPD operation and Advanced Mobile Phone Service (AMPS) operation.