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Cellular radiotelephone with dialed number analysis

  • US 5,535,260 A
  • Filed: 09/29/1994
  • Issued: 07/09/1996
  • Est. Priority Date: 02/24/1994
  • Status: Expired due to Term
First Claim
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1. A method of operating a cellular radiotelephone which is authorized to operate with a home cellular system that provides cellular services in a first geographical NPA area to originate a call, said method comprising the steps of:

  • identifying the entry of a first three dialed digits and a later dialed digit, said first three digits being dialed prior to said later digit;

    determining, in response to said first three digits, whether said later digit is a final digit of a phone number by evaluating said first three digits to determine whether said first three digits define a connected NPA code which is remotely programmed into said radiotelephone, said connected NPA code corresponding to a geographical NPA area which overlaps or is adjacent to said first geographical NPA area; and

    automatically transmitting an origination message when said later digit is said final digit of said phone number, said origination message conveying said phone number to a telecommunication network.

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