ALPHA-CALL

Publishing Venue

Motorola

Related People

Abstract

Described herein is a system that allows a user to send an alpha-numeric message from a stan- dard touchtone phone.

0 M

MOlOROlA Technical Developments Volume 9 August 1989

ALPHA-CALL

by Jaupes 6. Lopes

Abstract: Described herein is a system that allows a user to send an alpha-numeric message from a stan- dard touchtone phone.

   The set-up basically consists of a Paging System provided with an algorithm such that is able to recognize and execute a customer's '?one command" instruction. The Alpha-Call mode engagement as well as the sys- tem's instructions, are done by sets of two tones as described below.

To each user, there will be either a X amount of minutes or a Y number of tones allowed to deliver each message.

Depressing the '*' and then any of the numerical keys (except #I), will enable the character imprinted on the upper left corner of the key.

Depressing "#" and then any of the numerical keys (except #l), will enable the character on the upper right corner.

Depressing any key (except 1, 0, *, #), will enable the upper middle character.

ml - Enabler

Alpha-Call

r;l ^," q p7-J 'T q

ml";-]- A

A6 nN w

7 0 9 9

Pil

. CpER q 0 #

- 8

Nun ChXXl.

- Enable

- 3

r;l r;;l - Backto Alpha

0 Motorola, Inc. 1989 41