Cellular telephone with keypad controller

Details Cellular telephone with keypad controller Cellular telephone with keypad controller

1991-10-21

1993-09-21

Dwyer, James L.

Telephonic communications

Having light wave or ultrasonic link for speech or paging...

Including fiber optic link within telephone network

379 63, 379355, H04M 1100

Patent

active

052475654

ABSTRACT:
A unique cellular telephone (500) includes audio circuit 502, microcomputer (508), indicators (506) and (507), cellular telephone transceiver (519), and keypad controller (504) for controlling the operating modes thereof and automatically placing and receiving cellular telephone calls dialed in any pattern. The keypad includes numerical keys (0-9, # and *) and function keys (MEM and END/CLEAR) for entering digits of telephone number and key sequences for selecting operating modes. Power is applied to the cellular telephone transceiver (519) in response to concurrent activation of at least two keys. Each telephone number digit is detected and accumulated by microcomputer (508) and, after a pause of four seconds, the accumulated digits are sent via a data bus (511) to cellular telephone transceiver (519) for placing a telephone call. The call is subsequently terminated when the END key is activated or an END command is received by the cellular telephone transceiver (519). Thereafter, power to the cellular telephone transceiver (519) may be turned off in response to activation of the MEM-END key sequence.

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The Celjack Owners Manual by Telular Inc.
"Description and Specification GNTA Payphone Type AY4 (NMT) for Connection to a Mobile Radiostation in Accordance with the Specifications for the Nordic Mobile Telephone Systems (NMT)".

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