PROTECTION AGAINST LONG DISTANCE CHARGES IN A CT2 TELEPHONE SYSTEM
Original Publication Date: 1990-Oct-01
Included in the Prior Art Database: 2001-Nov-26
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.