Cellular radiotelephone with dialed number analysis
First Claim
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.
2 Assignments
0 Petitions
Accused Products
Abstract
A radiotelephone (10) simulates the call origination process performed by land-line telephones. Dial tone is generated (78) in response to an off-hook condition and removed when a first digit (54) is dialed. A timer process (84, 110) and a number analysis process (100) simultaneously evaluate dialed digits to detect the completion of dialing. The number analysis process (100) identifies seven, ten, and eleven digit, and indeterminate length phone number formats (64, 66, 52, 68). The ten digit format is recognized in response to remotely programmed (42) connected NPA codes. For most calls, the number analysis process (100) instantly detects a phone number'"'"'s final digit (62). In a few cases the timer process (84, 110) detects the final digit through the absence of dialing activity for a predetermined duration. When the final digit (62) is detected, an origination message is transmitted to a cellular network.
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Citations
16 Claims
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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:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. 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:
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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, 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 cellular telecommunication network, wherein said determining step further comprises the steps of; verifying that said radiotelephone is not roaming; and signifying, when said radiotelephone is not roaming and said first three digits correspond to said connected NPA area, the final digit of said phone number as occurring upon entry of a tenth dialed digit to be conveyed to said cellular telecommunication network.
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10. 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:
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detecting the entry of each of a stream of dialed digits; initiating a timer when each of at least a portion of said stream of digits is entered so that subsequent digit entries reinitiate said timer; activating a number analysis process, said number analysis process responding to a first three of said digits to predict whether a last-entered 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; selecting between said timer and said number analysis process to provide a decision regarding when an entire phone number has been entered; and automatically transmitting an origination message when said entire phone number has been entered, said origination message conveying said phone number to a cellular telecommunication network. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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Specification