Telephonic communications – With check operated control – Other than coin
Patent
1992-10-05
1995-12-26
Chin, Stephen
Telephonic communications
With check operated control
Other than coin
379112, 379216, 379289, 379355, H04M 1500, H04M 1700, H04M 342, H04M 100
Patent
active
054794943
ABSTRACT:
A calling card subscriber is allowed to choose at least some of the digits of his or her calling card number to form a virtual card number. Associated with the virtual card number is a standardized card number i.e., a number conforming to the Bellcore calling card numbering plan. When the subscriber uses the virtual card number to make a calling card call, the virtual card number is mapped into the standardized number. The latter is then used by the telephone system for subsequent validation and billing.
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"Operator Services Position System", AT&T Technical Journal, vol. 68, No. 6, Nov./Dec. 1989, pp. 1-62.
AT&T Corp.
Caccuro John A.
Chin Stephen
Shankar Vijay
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