Radiotelephone operating method with connected NPA dialing analysis
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Sep 17, 2002
Issued Date -
N/A
app pub date -
Nov 16, 2000
filing date -
Feb 24, 1994
priority date (Note) -
Expired
status (Latency Note)
Importance
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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