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Systems and methods using secondary signal backchanneling

  • US 7,130,409 B2
  • Filed: 12/05/2002
  • Issued: 10/31/2006
  • Est. Priority Date: 12/05/2002
  • Status: Expired due to Fees
First Claim
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1. A system for supporting telephony comprising:

  • a plurality of client telephony devices for initiating and receiving calls;

    a telephony-over-local area network (ToL) enabled to support communications involving said client telephony devices with respect to both voice data and call-processing signals, thereby providing a first signal-handling capability of exchanging said call-processing signals for voice calls directed for connection to said client telephony devices via said ToL; and

    a second network enabled to provide a second signal-handling capability of exchanging said call-processing signals for said voice calls directed for connection to said client telephony devices via said ToL, said first and second signal-handling capabilities being redundant capabilities for exchanging said call-processing signals with individual said client telephony devices;

    wherein said second network is configured to limit activation of said second signal-handling capability to occasions in which said ToL is disabled with respect to supporting said communications involving said client telephony devices.

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