Automatic prefix systems and methods for mobile radiotelephones

Details Automatic prefix systems and methods for mobile radiotelephones Automatic prefix systems and methods for mobile radiotelephones

1995-09-20

1998-02-24

Knepper, David D.

Telecommunications

Transmitter and receiver at same station

Radiotelephone equipment detail

455565, 455401, 455460, H04M 1100, H04Q 700

Patent

active

057220883

ABSTRACT:
A mobile radiotelephone is responsive to user entry of an extension such as the last four digits of a telephone number, to identify a prefix such as the first three digits of a telephone number, for the user-entered extension. By automatically identifying a prefix, the user need not enter all of the numbers for the destination telephone. A default automatic prefix may be stored and retrieved in response to user entry of an extension. Alternatively, in response to user entry of an extension, the stored extensions in a memory such as a speed dialing memory are searched to identify a match to the user-entered extension. The associated prefix for the matched extension is retrieved. Default and speed dialing prefix identification may be combined. Simplified dialing and enhanced user safety are thereby provided.

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