What prevents toll fraud on voicemail ports?

The correct answer is B. CSS. Toll fraud on voicemail ports occurs when an attacker exploits a voicemail system's transfer or callback capabilities to place unauthorized PSTN calls. In Cisco Unified Communications Manager, voicemail ports are directory numbers assigned a Calling Search Space (CSS). The CSS de

Cisco Unity Connection

Question

Options

AIP address trusted list on the PSTN gateway
BCSS
CBlock OffNet to OffNet Transfer service parameter
DFAC

How the community answered

(29 responses)

B
86% (25)
C
3% (1)
D
10% (3)

Explanation

Toll fraud on voicemail ports occurs when an attacker exploits a voicemail system's transfer or callback capabilities to place unauthorized PSTN calls. In Cisco Unified Communications Manager, voicemail ports are directory numbers assigned a Calling Search Space (CSS). The CSS determines which partitions - and therefore which dial patterns - the voicemail port is permitted to route calls to. By assigning a restrictive CSS to voicemail ports that only allows internal destinations and blocks PSTN or long-distance patterns, administrators prevent the voicemail system from being used as a relay for fraudulent calls. FAC (Forced Authorization Codes) controls end-user dialing, not voicemail ports, and IP trusted lists apply to signaling trust, not call routing restrictions.

Topics

#Toll Fraud Prevention#Calling Search Space (CSS)#Voicemail Security#Cisco Unity Connection Integration

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