Patents Assigned to ADC DSL System, Inc.
  • Embedded cell loopback method and system for testing in ATM networks
    Publication number: 20030169691
    Abstract: The present invention relates to a method and apparatus for testing components in ATM networks utilizing loop-back based ATM layer testing. The method and apparatus utilize interfaces and identifier codes to send and loop-back test cells along portions of virtual channels to test the virtual channels.
    Type: Application
    Filed: March 6, 2002
    Publication date: September 11, 2003
    Applicant: ADC DSL System, Inc.
    Inventors: Randall L. Powers, Robert S. Kroninger, Melvin R. Phillips, Dieter H. Nattkemper
  • Differential voltage limiter
    Publication number: 20030117020
    Abstract: A low cost differential voltage limiter circuit provides a feedback to regulate a voltage output of a voltage source. In one embodiment, the limiter circuit includes a transistor coupled to outputs of first and second voltage sources. If a differential voltage between the two sources exceeds a predetermined threshold, the output voltage of the higher source is reduced. In one embodiment, a PNP transistor is used to regulate the high voltage source.
    Type: Application
    Filed: December 21, 2001
    Publication date: June 26, 2003
    Applicant: ADC DSL System, Inc.
    Inventor: George Bertram Dodson