Which of these methods can be used to implement toll-fraud prevention?

Which of these methods can be used to implement toll-fraud prevention?

Which of these methods can be used to implement toll-fraud prevention?

A.
drop conferences when only two attendees remain

B.
block on-net to on-net calls

C.
deploy conferencing resources to only those employees that require the service

D.
drop conferences when no on-net party remains



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