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Private branch exchange system having an automatic optimal route selecting mechanism

  • US 5,337,352 A
  • Filed: 06/27/1991
  • Issued: 08/09/1994
  • Est. Priority Date: 06/29/1990
  • Status: Expired due to Fees
First Claim
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1. A private branch exchange system, located in a first zone and operative for connecting calls from the first zone to a remote zone, comprising:

  • a plurality of tenants, each tenant having a plurality of associated terminals, each terminal being selectively operable for placing a call;

    a switch associated with the plurality of tenants, each associated terminal of each tenant being connected to the switch and each call placed by a calling terminal being coupled to and received by the switch;

    a plurality of trunks connected to said switch, the switch coupling a received call to a selected trunk for transmission through the trunk;

    a plurality of routes which selectively receive calls transmitted through the plurality of trunks, each route coupling the call received thereby to the remote zone, each tenant establishing a priority order of selected routes, of the plurality of routes, for coupling calls from the associated terminals thereof to the remote zone;

    memory means for storing, in a table, information indicating, for each tenant, the respective priority order of selected routes; and

    control means, coupled to said switch and said memory means and responsive to a call received by the switch, for identifying the tenant with which the calling terminal is associated and for accessing the memory in accordance with the identified tenant to obtain the information stored in the table of the memory means indicating the respective priority order of selected routes for the tenant and, in responsive thereto, for selecting an optimal route for coupling of the call to the remote zone in accordance with determining and selecting the highest priority order available route, of the respective priority order of selected routes established for the identified tenant, and controlling the transmission of the call over the selected optimal route to the remote zone.

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