×

Automated mass calling control for public switched telephone networks employing a packet based virtual tandem

  • US 7,002,915 B1
  • Filed: 11/22/1999
  • Issued: 02/21/2006
  • Est. Priority Date: 11/22/1999
  • Status: Expired due to Fees
First Claim
Patent Images

1. A system for controlling telephone calls through the public switched telephone network (PSTN) wherein a packet transport network is employed to transport telephone calls between end systems within the PSTN, the system comprising:

  • a plurality of interworking elements to provide interworking functionality between TDM switches in the PSTN and said packet transport network; and

    a centralized call server to independently provide tracking and recording functionality respecting telephone calls through said system;

    said call server including means to detect a mass calling event and to regulate calls to a dialed number for which a mass calling has been detected; and

    said call server including means to detect the end of a mass event and to end regulation of calls to a dialed number upon detection of an end to a mass calling events, further having a credit bucket mechanism for use in controlling to a dialed number in which a mass calling event has been detected, said credit mechanism including a timer to set an interval for issuing credit tokens to said bucket and a detector to determine if any credits are in the bucket upon receipt of a new call attempt to said dialed number.

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