Magneto Signalling Patents (Class 379/371)
  • Distributed PBX, KSU and the like system utilizing internet protocol
    Patent number: 6711155
    Abstract: A distributed PBX, KSU and the like system has at least one time domain multiplexed (TDM) switch unit interfaced with transparent wideband channels such as Ethernet by means of at least one Public Switched Telephone Network (PSTN) interface unit and at least one service module (SM) interconnecting it to remote station terminals. One or more applications servers may be located where available or convenient and interact with the TDM switch unit by means of IP addressable path or paths.
    Type: Grant
    Filed: December 29, 1999
    Date of Patent: March 23, 2004
    Assignee: Nortel Networks Limited
    Inventors: Lee C. Himbeault, Steven J. Rhodes, Ronald G. Wellard, Paul A. Senyshyn