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ATM-based distributed virtual tandem switching system

  • US 6,219,348 B1
  • Filed: 05/01/2000
  • Issued: 04/17/2001
  • Est. Priority Date: 04/30/1998
  • Status: Expired due to Term
First Claim
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1. An Asynchronous Transfer Mode (ATM) based distributed virtual tandem switching system, comprising:

  • an ATM switching network comprising a plurality of ATM switches;

    a trunk interworking function (T-IWF) device adapted to receive end office voice trunks from TDM channels and convert the trunks to ATM cells; and

    a centralized control and signaling interworking function (CS-IWF) device that performs call control functions for the plurality of ATM switches and is adapted to interface narrowband and broadband signaling for call processing and control within the ATM switching network.

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