300-810 · Question #292
When an engineer configures a Cisco Unity Connection system, they must help prevent toll fraud. The system must be able to receive calls from external parties and allow for unauthenticated users to…
The correct answer is A. Set up a restriction table to block all external calls to do a hairpin call with the pattern ?.*T? Cisco Unity Connection restriction tables control which dial strings users (including unauthenticated callers) can invoke when the system transfers a call. A hairpin call is when an incoming external call is transferred back out to another external number, causing toll charges…
Question
When an engineer configures a Cisco Unity Connection system, they must help prevent toll fraud. The system must be able to receive calls from external parties and allow for unauthenticated users to enter numbers to be transferred to other parties in case of a busy status or other away- status scenarios. Which basic configuration limits the risk of toll fraud in Cisco Unity Connection?
Options
- ASet up a restriction table to block all external calls to do a hairpin call with the pattern ?.*T?
- BThe default restriction table will, by default, block all numbers.
- CBlock all outgoing calls from the Cisco Unity Connection server with the pattern ?
- DSet up a restriction table to block all external calls to do a hairpin call with the pattern ?@*?
How the community answered
(51 responses)- A73% (37)
- B14% (7)
- C10% (5)
- D4% (2)
Explanation
Cisco Unity Connection restriction tables control which dial strings users (including unauthenticated callers) can invoke when the system transfers a call. A hairpin call is when an incoming external call is transferred back out to another external number, causing toll charges. The pattern '?.*T?' in a restriction table blocks dial strings that match external number patterns with a transfer indicator, preventing callers from routing calls back out through the PSTN. Option B is incorrect - the default restriction table in Unity Connection does NOT block all numbers by default. Option C would break legitimate internal transfers. Option D uses an incorrect wildcard syntax.
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