Method and apparatus to provide pay-per-call performance based advertising

ASSIGN A UNIQUE TELEPHONE NUM BER TO AN
ADVERTISER

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PROVIDE AN ADVERTISEMENT ON A MEDIA CHANNEL ON

BEHALF OF THE ADVERTISER, THE ADVERTISEM ENT INCLUDING ONE OF THE UNIQUE TELEPHONE NUM BERS AND A REFERENCE TO THE UNIQUE TELEPHONE NUM BER

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MONITOR TELEPHONE CALLS TO THE UNIQUE
TELEPHONE NUMBER

CHARGE ADVERTISER BASED ON PHONE CALL ACTIVITY
THROUGH ASSIGNED TELEPHONE NUMBER

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