| http://www.w3.org/ns/prov#value | - The present invention--the Telephone Charging Agent (TCA)--addresses these limitations by allowing two or more people on a telephone call to enter data (for example credit card data or other charging data such as a card number, a home telephone number, a dollar amount, etc.) using the telephone as the instrument of data entry (either the caller's phone or the called party's phone or one of the par
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