MENU
The security department will audit an IT department to ensure that the proper guidelines are being followed. The reports of the call detail records show unauthorized access to PSTN. Which two actions should an administrator check to prevent the unauthorized use of the telephony system? (Choose two.)
Suggested Answer: D
Get Premium 350-801 Questions
as Interactive Web-Based Practice Test or PDF
Real Exam Format
Detailed Explanations
Instant Access
Get Your Practice Test
When building a variable-length route pattern, you need to create a second route pattern followed by the # wildcard. This will allow the user to indicate the end of the number by dialing #. For example, if you want to create a route pattern for international calls, you would create a route pattern like this:
9.011!#
This route pattern will match any number that starts with 9.011, followed by any number of digits, and then ends with #.
The other options are incorrect because:
Configuring a single route pattern for international calls will not allow the user to indicate the end of the number.
Setting up all international route patterns to 0.! will not allow the user to indicate the end of the number.
Reducing the T302 timer to less than 4 seconds will not allow the user to indicate the end of the number.
35 comments · newest first
JA
Jannette
11 months ago
Agreed, B is a must to keep things secure!
BE
Ben
11 months ago
Wait, are we really trusting just a firewall for this?
CA
Candra
11 months ago
Not sure about D, seems a bit excessive for extension mobility.
LO
Lorean
11 months ago
I think A is also important, can't risk external users.
IL
Ilene
12 months ago
Definitely B and E, those are crucial!
CH
Cherelle
12 months ago
I’m a bit confused about the firewall option; I thought it was more about network security rather than telephony specifically.
VI
Vicky
1 year ago
I practiced a similar question, and I feel like using a forced authorization code is definitely a good way to prevent unauthorized calls.
LI
Ligia
1 year ago
I think ensuring that ad hoc conference calls are dropped for external users could help, but I need to double-check that.
NA
Naomi
1 year ago
I remember something about restricting call forwarding settings, but I'm not sure if it's the best option here.
LA
Lavonne
1 year ago
This is a tricky one. I'm not entirely sure about the relationship between the Cisco UCM server and Expressway Core server, so I'm hesitant to choose the firewall option. I'll focus on the call forwarding and extension mobility settings instead.
AR
Arthur
1 year ago
I'm confident I can handle this. Ensuring ad hoc conference calls are dropped for external users and using forced authorization codes for international calls are the two best actions to take.
ST
Stephaine
1 year ago
Okay, I think I've got this. The key is to restrict call forwarding and extension mobility settings to internal extensions only. That should help prevent external users from accessing the PSTN.
WE
Wenona
1 year ago
Hmm, I'm a bit unsure about this one. The options seem to cover different aspects of telephony security, but I'm not sure which two would be the best actions to prevent unauthorized PSTN access.
HU
Huey
1 year ago
This question seems straightforward. I'll focus on the key details about unauthorized access to the PSTN and look for actions to prevent that.
AN
Anna
1 year ago
Wait, so they're auditing the IT department to make sure they're following the guidelines? I thought the IT department was the one making the guidelines! Talk about role reversal.
IV
Ivan
1 year ago
E) Forced authorization code is used to recognize a dialing extension and authorize an international call.
AN
Angella
1 year ago
Yeah, they need to tighten up security measures to prevent unauthorized access.
CO
Cordelia
1 year ago
C) Add an additional firewall between the Cisco UCM server and the Expressway Core server.
JA
Janet
1 year ago
A) Ensure that ad hoc conference calls are dropped if an external user is add.
CA
Casie
1 year ago
A is a bit of a head-scratcher. Why would you drop conference calls just because an external user is added? That seems like it would cause more problems than it solves.
AM
Amie
1 year ago
D is interesting, but I'm not convinced it's the right approach. Restricting extension mobility CSS is more about user management than telephony security.
DE
Denise
1 year ago
C) Add an additional firewall between the Cisco UCM server and the Expressway Core server.
TA
Tamesha
1 year ago
B) Call forward settings (ALL/Busy/No Answer) are restricted to internal extensions in the network
EA
Earnestine
1 year ago
A) Ensure that ad hoc conference calls are dropped if an external user is add.
YO
Yolando
1 year ago
I'm not sure about C. Adding a firewall between the UCM and Expressway servers seems like overkill for this specific issue.
MA
Markus
1 year ago
D) For extension mobility, logged-out CSS is restricted to internal extensions and emergencies.
ST
Stefany
1 year ago
B) Call forward settings (ALL/Busy/No Answer) are restricted to internal extensions in the network
ZE
Zena
1 year ago
A) Ensure that ad hoc conference calls are dropped if an external user is add.
WI
Winfred
1 year ago
B and E seem like the best options to prevent unauthorized PSTN access. Restricting call forwarding and using forced authorization codes are effective security measures.
VA
Valentin
1 year ago
I think implementing these security measures will greatly reduce the risk of unauthorized access to the telephony system. It's important to stay vigilant and proactive in protecting our network.
CE
Cecil
1 year ago
Agreed, those measures will help ensure only authorized users can make PSTN calls. We should implement them as soon as possible.
FA
Fairy
1 year ago
B and E are definitely important to prevent unauthorized access. We need to restrict call forwarding and use authorization codes.
AM
Amira
2 years ago
Adding an additional firewall between the servers could also be a good idea for extra security.
DA
Dan
2 years ago
I agree, those two actions can help prevent unauthorized access to the telephony system.
JO
Josphine
2 years ago
I think we should check the call forward settings and the forced authorization code.