Browse Prior Art Database

PROTECTION AGAINST LONG DISTANCE CHARGES IN A CT2 TELEPHONE SYSTEM

IP.com Disclosure Number: IPCOM000006013D
Original Publication Date: 1990-Oct-01
Included in the Prior Art Database: 2001-Nov-26
Document File: 2 page(s) / 88K

Publishing Venue

Motorola

Related People

Steve Shapiro: AUTHOR

Abstract

With the popularity of Cellular telephones in the 1990's and the evolution world wide to CT2 telephone systems, the operators of such systems are very concerned about their liability for expensive telephone calls made by their subscribers. In some systems, long distance (especially International) calling is not permitted unless the subscriber has a guaranteed line of credit. Even with such lines of credit, the subscriber may have the tendency to say "I did not make those calls" at the end of the month when they receive their bill.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 50% of the total text.

Page 1 of 2

0 M M-ROLA

Technical Developments Volume 11 October 1990

PROTECTION AGAINST LONG DISTANCE CHARGES IN A CT2 TELEPHONE SYSTEM

by Steve Shapiro

   With the popularity of Cellular telephones in the 1990's and the evolution world wide to CT2 telephone systems, the operators of such systems are very concerned about their liability for expensive telephone calls made by their subscribers. In some systems, long distance (especially International) calling is not permitted unless the subscriber has a guaranteed line of credit. Even with such lines of credit, the subscriber may have the tendency to say "I did not make those calls" at the end of the month when they receive their bill.

   With the use of preprogrammed PIN (Personal Identification Numbers) in CT2 systems, the system operator now has a way to verify that the subscriber is responsible for such charges. Therefore, the system operator can now allow long distance and International calls with their established customers with some certainty that the paying subscriber was the one who made or authorized the call.

CURRENT SITUATION

   In most CT2 systems, the subscriber equipment has a 3 or 4 digit LOCK code. The subscriber is expected to elec- tronically lock the phone when it is not in use so even if someone turns it on, the phone is not useable without first entering the LOCK code. Unfortunately most subscribers find this to be a nuisance so the phones are never locked.

   In the CT2 systems in London, users are presently expected to enter their 4 digit PIN before each call. This is known as the call set up period. The users have found this to be a nuisance so the next generation products that conform to the CAI (Common Air Interface) protocol will have the subscriber handset automatically send the PIN over the air as the calling...