×

Telemetry system with suppressed ringing connection

  • US 5,359,641 A
  • Filed: 12/22/1992
  • Issued: 10/25/1994
  • Est. Priority Date: 12/22/1992
  • Status: Expired due to Term
First Claim
Patent Images

1. A telemetry system for accessing equipment at telephone subscriber locations over telephone loop networks which require different signalling modes for initiating operation, said equipment at each subscriber location generating an acknowledgement signal when accessed, and said system comprising:

  • a telephone switching network for providing access to said subscriber locations over said telephone loop networks serving said subscriber locations;

    and first means for controlling said telephone switching network so as to establish suppressed ringing connections through said telephone switching network to said subscriber locations over said telephone loop networks for accessing said equipment, said first means including a set-up routine for identifying the signalling mode of the telephone loop network serving a subscriber location by;

    controlling said telephone switching network to sequentially attempt to establish a suppressed ringing connection through said telephone switching network to the subscriber location over the telephone loop network serving the subscriber location using a different one of said signalling modes during each said attempt;

    after each said attempt waiting for an acknowledgement from the equipment at the subscriber location before proceeding with a next attempt; and

    after an acknowledgement is received, ceasing any subsequent attempts and identifying the telephone loop network serving the subscriber location with the signalling mode which resulted in said acknowledgement.

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