A collaboration engineer wants to stop fraudulent calls to the PSTN that are being made through Cisco Unity Connection Cisco Unity Connection is integrated with Cisco UCM via the SCCP protocol…

The correct answer is B. Change the CSS of the voicemail port. When Cisco Unity Connection is integrated with Cisco UCM via SCCP, the voicemail ports are essentially SCCP devices registered to UCM. The Calling Search Space (CSS) assigned to these voicemail ports determines what dial patterns those ports can reach. To prevent fraudulent…

Cisco Unity Connection

Question

A collaboration engineer wants to stop fraudulent calls to the PSTN that are being made through Cisco Unity Connection Cisco Unity Connection is integrated with Cisco UCM via the SCCP protocol. Which action accomplishes this goal?

Options

AChange the Rerouting CSS on the trunk to Cisco Unity Connection
BChange the CSS of the voicemail port
CChange the configuration of the routing rule
DRemove values from the restriction table

How the community answered

(66 responses)

A
12% (8)
B
80% (53)
C
5% (3)
D
3% (2)

Explanation

When Cisco Unity Connection is integrated with Cisco UCM via SCCP, the voicemail ports are essentially SCCP devices registered to UCM. The Calling Search Space (CSS) assigned to these voicemail ports determines what dial patterns those ports can reach. To prevent fraudulent outbound PSTN calls from being made through Unity Connection, the engineer should change the CSS of the voicemail ports to one that restricts or removes access to PSTN route patterns. This is the proper and targeted fix because it limits what the voicemail system can dial without affecting inbound call handling.

Topics

#Cisco Unity Connection#Calling Search Space (CSS)#PSTN Access Control#Voicemail Port Security

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