Is it possible to prevent transfer to extension during Auto Attendant?

[Johnny Cakes]

During the auto attendant, the caller can reach an extension by dialing the extension number. Is it possible to PREVENT the caller from doing that, thereby forcing him to select one of the five options (e.g. the option assigned to pressing 1, 2, 3, 4, or 5)?

It seems like the always caller can "barge through" the auto attendant options if he knows the correct extension number. Is is possible to prevent that?

[Johnny Cakes]

For example, if the caller knows that the president is extension 111, the caller can just avoid the "correct" options in the auto attendant and ring the president directly from the auto attendant, even when that is not an auto attendant option. This can't be avoided?

[sceaton]

No, not to my knowledge.

[mp01]

You need to only use single digit options in your AA.

Then:

Under Troubleshooting / Auto Attendant, set the Single digit fall through time to immediately.

All calls at the auto-attendant are restricted to single digit options. The auto-attendant will act immediately on first digit dialed. This blocks access to individual extension numbers, ring groups, and remote extensions, etc.

[LTN]

Based on the single digit only option, anyone with the extension "1" will get most of the calls even when someone wanted to press 112, 113, 114, etc.