You are a Network Engineer at ABC Company. You want to ensure that when the contact center agent for the company makes an external call, the extension 897 654 300 is displayed. How do you resolve…

Question

Options

• AConfigure a Line Text Label on the Directory Number configuration page.
• BConfigure an external phone number mask on the Directory Number configuration page.
• CConfigure a translation pattern with the pattern 897654300.
• DConfigure an external phone number mask on the Device configuration page.

• A
  4% (1)
• B
  92% (22)
• C
  4% (1)

Explanation

To control what external parties see as the caller ID when a CUCM-registered phone makes an outbound call, you configure an 'External Phone Number Mask' on the Directory Number (DN) configuration page. This mask overrides the internal extension with the desired outward-facing number (897 654 300 in this case) when the call exits to the PSTN. Option A (Line Text Label) only changes the display name on the phone screen. Option C (translation pattern) would redirect calls to that number, not mask the outgoing caller ID. Option D is incorrect because the external phone number mask is set at the DN level, not the device level.

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