×

Device for monitoring a switch

  • US 5,579,368 A
  • Filed: 04/29/1994
  • Issued: 11/26/1996
  • Est. Priority Date: 05/18/1992
  • Status: Expired due to Term
First Claim
Patent Images

1. A switch sentry device, comprising:

  • a digital telephony switch;

    means for processing information;

    means for simulating a call from the processing means to the switch;

    means responsive to the call simulating means for simulating a primary ringing line from the switch to the processing means;

    means responsive to the call simulating means for simulating an alternate ringing line from the switch to the processing means;

    means for determining an inoperative condition of the switch;

    means for determining priority in a plurality of alarms indicating a plurality of fault conditions; and

    means for indicating a condition only of the most critical of the alarms in said priority of alarms.

View all claims
  • 13 Assignments
Timeline View
Assignment View
    ×
    ×