Method of establishing communication link to one of multiple devices associated with single telephone number

  • US 5,454,032 A
  • Filed: 05/07/1993
  • Issued: 09/26/1995
  • Est. Priority Date: 01/29/1993
  • Status: Expired due to Term
First Claim
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1. A method of establishing a telephone communication link from a calling line to one of plural peripheral devices associated with a single telephone number in a telephone switching system comprising:

  • (a) storing in a memory a first table of directory numbers and equipment identifiers associated with each directory number,(b) storing in a memory a second table of references to physical peripheral devices associated with each equipment identifier,(c) receiving a request for service to a particular directory number,(d) accessing the first table using said particular directory number and obtaining references to all equipment identifiers associated therewith,(e) accessing the second table using the particular equipment identifiers associated with said particular directory number and identifying the particular physical peripheral devices associated with said particular identifiers,(f) ringing all of said particular physical peripheral devices,(g) detecting one of said particular physical devices going off-hook,(h) ceasing ringing of all said particular peripheral devices, and(i) establishing a communication link only to said one physical device,(j) in which the switching system is comprised of a main controller having access to said memories, a message switch and a circuit switch controllable by the controller, a peripheral control to which the physical peripheral devices are connected, the peripheral control being connected to the circuit and message switches, further including the steps of the main controller accessing said tables and sending a message via the message switch to the peripheral control to seize and ring all said particular peripheral devices, reserving communication channels through said circuit switch from the calling line to all of said peripheral devices, and after detecting said one of the physical devices going off-hook, releasing all said particular physical devices except the one off-hook, releasing all the reserved communication channels to all said particular physical devices except the one off-hook, and establishing the reserved communication channel through the circuit switch from the calling line to the off-hook particular physical device.

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