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

The correct answer is D. drop conferences when no on-net party remains. Toll fraud via conferencing occurs when an external PSTN caller joins a conference bridge and then uses transfer or feature exploitation to bridge to another external expensive number - effectively using the company's conferencing resources and PSTN trunks to make free calls…

Cisco Unified Communications Manager (CUCM)

Question

Options

Adrop conferences when only two attendees remain
Bblock on-net to on-net calls
Cdeploy conferencing resources to only those employees that require the service
Ddrop conferences when no on-net party remains

How the community answered

(39 responses)

A
5% (2)
B
3% (1)
C
13% (5)
D
79% (31)

Explanation

Toll fraud via conferencing occurs when an external PSTN caller joins a conference bridge and then uses transfer or feature exploitation to bridge to another external expensive number - effectively using the company's conferencing resources and PSTN trunks to make free calls. Dropping a conference when no on-net (internal) party remains (D) directly mitigates this attack vector: if all internal participants leave, the conference is torn down, preventing external callers from continuing to use the bridge. Option A (drop when two attendees remain) does not address the fraud scenario. Option B (block on-net to on-net) would be disruptive. Option C (limit conferencing resources) is an access-control measure but does not prevent toll fraud from authorized users.

Topics

#toll fraud prevention#conferencing security#on-net calls#conference drop

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