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Piggy-back number and routing isolation for cellular telephone switches

  • US 5,216,703 A
  • Filed: 06/17/1991
  • Issued: 06/01/1993
  • Est. Priority Date: 06/17/1991
  • Status: Expired due to Term
First Claim
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1. A piggy-back number and routing isolation method for a cellular telephone switch, comprising the steps of:

  • (a) receiving a call from a cellular customer, wherein the call comprises an abbreviated dialing sequence identifying a third party, and wherein the abbreviated dialing sequence is comprised of a leading portion and a trailing portion;

    (b) routing the call to a special trunk using the leading portion of the abbreviated dialing sequence, wherein the special trunk comprises two ports of the cellular telephone switch connected together in a loop-back manner;

    (c) stripping the leading portion from the abbreviated dialing sequence and inserting in its place a dialing prefix, wherein a combination of the dialing prefix and the trailing portion of the abbreviated dialing sequence comprises a mobile phone number assigned to the third party;

    (d) dialing out on the special trunk using the mobile phone number assigned to the third party;

    (e) receiving a call from the special trunk to the mobile phone number, wherein the mobile phone number is configured for call forwarding to a land-based number assigned to the third party; and

    (f) call forwarding the call to the land-based number assigned to the third party.

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