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RECOGNIZING PHONE NUMBERS CONTAINING ALPHABETIC CONTENT

IP.com Disclosure Number: IPCOM000009859D
Original Publication Date: 2000-May-01
Included in the Prior Art Database: 2002-Sep-24
Document File: 2 page(s) / 95K

Publishing Venue

Motorola

Related People

Huang Siong Lee: AUTHOR

Abstract

Phone numbers using alphabetical characters are popular in the U.S. They are becoming popular in other countries where the usage of the English alphabet is prevalent. This is possible as each iligitlbutton on the keypad is associated with a few alphabetic letters. ETSI has defined a specification on " Assignment of alphabetic letters to digits on standard telephone keypad arrays". For example, the digit 2 is assigned A, B, C and iligit 9 W, X, Y, Z.

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MOTOROLA

Technical Developments

RECOGNIZING PHONE NUMBERS CONTAINING ALPHABETIC CONTENT

by Huang Siong Lee

INTRODUCTION

Phone numbers using alphabetical characters are popular in the U.S. They are becoming popular in other countries where the usage of the English alphabet is prevalent. This is possible as each iligitlbutton on the keypad is associated with a few alphabetic letters. ETSI has defined a specification on " Assignment of alphabetic letters to digits on standard telephone keypad arrays". For example, the digit 2 is assigned A, B, C and iligit 9 W, X, Y, Z.

ABC OœF 1 2 3

GHI J)Q.. MNO 4 5 6

PQRS 'TUV WX'fZ 7 8 9

* 0 #

Fig. 1 Assignment of alphabetic letters to digit on a keypad

As it is easier for people to remember names/things/services rather than a sequence of iligits, many companies choose to use phone numbers with alphabetic content. They use a simple catchy word to reflect the name of the company or a particular service provided by the company. Examples of phone numbers using alphabets are as follows:

1800-SINGTEL 1800-74(j4835 Customer service number of SingTel company

1800- TRA VEL 1800-8728355 Customer service number of a travel agency

Motorola. Inc. 2000

7333BUG 7333284 Customer service number of a pest control company

Consider the existing mobile phone: Most come with a keypad with alphabets indicated on the button. (See Figure 1) To enter the alphabetic phone number, the user will have to locate the button with the letter and depress the button.

However, the new generation of SMART phone/PDA communicator might do away with the traditional keypad interface. Big display with touch screen capability will be common in such a high-end device. Virtual keypad and voice recognition features might be used to dial and reach the intended recipient. The virtual keypad can be displayed on the screen for user entry. Alternatively, the virtual keypad can comprise of a character recognition engine that can recognize the user entry through the strokes entered by the user. It might not be feasible to display a 12-button keypad with iligits and letters on the screen, t...