Patents Assigned to Cellular Technical Services Co., Inc.
  • Patent number: 6021315
    Abstract: A system and method for testing wireless communication devices uses a waveguide designed for operation beyond cutoff for frequencies used by the wireless communication device to be tested. The waveguide has first and second ends with at least an opened first end to permit the easy insertion and removal of the wireless communication device. An antenna located within the waveguide and coupled to an external test system permits wireless communication between the external test system and the wireless communication device when inserted in the waveguide. Radio frequency (RF) signals propagate between the antenna located within the waveguide and the wireless communication device when inserted into the waveguide. The length of the waveguide is designed to provide sufficient attenuation of RF transmissions when measured at the opened end of the waveguide.
    Type: Grant
    Filed: November 19, 1997
    Date of Patent: February 1, 2000
    Assignee: Cellular Technical Services Co., Inc.
    Inventor: Frederick J. Telewski
  • Patent number: 5970405
    Abstract: A system and method for the detection of fraudulent use of a wireless telephone system includes a fingerprint analyzer that identifies an unauthenticated wireless telephone as authorized or fraudulent based on a fingerprint of the unauthenticated wireless telephone. The system maintains a valid destination list specific for each authorized wireless telephone. Each valid destination list contains destinations considered to be valid for that particular authorized wireless telephone. When an unauthenticated wireless telephone transmits a call request containing a destination, the system classifies the call as valid when the destination is in the valid destination list for the authorized wireless telephone regardless of whether the fingerprint analyzer identifies the unauthenticated wireless telephone as fraudulent. The system may bypass or terminate the fingerprint analysis, or simply ignore the result of the fingerprint analysis by the fingerprint analyzer.
    Type: Grant
    Filed: February 28, 1997
    Date of Patent: October 19, 1999
    Assignee: Cellular Technical Services Co., Inc.
    Inventors: Dmitry Kaplan, David M. Stanhope, Randolph W. McKernan, Howard L. Wilburn, Evan R. Green
  • Patent number: 5819171
    Abstract: A method and apparatus which provide the ability to disrupt normal completion of a specific call made through a wireless telephone system. The specified call can be forced to be immediately ended, re-routed immediately to a selectable destination, or linked to a local voice frequency interface. The disruption of the call can occur at any point in time over the duration of the call. The decision to disrupt the call, as well as which action to take against the call, can be selected manually by a human or automatically through a standard data interface provided. The call disruption apparatus can be interfaced to the wireless system through a circuit physically connected to the wireless telephone system equipment, or through a modulated radio frequency interface.
    Type: Grant
    Filed: August 31, 1995
    Date of Patent: October 6, 1998
    Assignee: Cellular Technical Services Co., Inc.
    Inventors: David N. Hoogerwerf, David M. Stanhope, William Gerrit Barrere, Evan R. Green, Randolph W. McKernan