Patents Assigned to Seiscor Technologies
  • Digital communication apparatus and method
    Patent number: 4980887
    Abstract: A T1 digital carrier system having a transmitter, receiver and a plurality of intermediate repeater stages. Each remote repeater has a select switch for automatically selecting that the remote repeater be placed in loop-back mode should a combination of framing bits occur in the serial bit stream that matches that said remote repeaters address therein, thereby allowing remote testing of the communications link and repeaters. In addition, no additional test lines are required to verify a T1 communications link.
    Type: Grant
    Filed: October 27, 1988
    Date of Patent: December 25, 1990
    Assignee: Seiscor Technologies
    Inventors: Lee V. Dively, Donald R. Casady