Requirement 2; If the calling number 7000 makes an outgoing call through the SIP trunk, the calling number needs to be changed to 28887000. To implement the preceding requirements, which of the…

Question

Options

• AOn the Trunk tab page of the web configuration page, set Calling number change to Yes under
• BOn the Trunk tab page of the web configuration page, set Calling number change to Yes under
• COn the Trunk tab page of the web configuration page, set the number change rule under Office
• DOn the Trunk tab page of the web configuration page, set the number change rule under Office
• EOn the Trunk tab page of the web configuration page, set the number change rule under Office

• A
  5% (2)
• B
  76% (29)
• C
  5% (2)
• D
  13% (5)

Explanation

Options B and E work together as a complete solution because changing a calling number on an outgoing SIP trunk requires two coordinated steps: first, enabling the calling number change feature on the trunk (B), and second, defining the specific transformation rule that maps the internal number 7000 to the external number 28887000 (E). Neither step alone is sufficient - enabling the feature without a rule does nothing, and a rule without the feature enabled won't execute.

Why the distractors fail:

• A likely enables calling number change for the wrong direction (e.g., incoming rather than outgoing) or uses an incorrect trunk scope, so it doesn't apply to the outgoing call scenario described.
• C and D configure number change rules but with incorrect parameters - likely the wrong matching pattern, wrong prefix (the transformation must produce "2888" + "7000"), or the rule is placed under the wrong office direction - so the number would not be correctly modified to 28887000.

Memory tip: Think of it as a two-key lock - you need one key to unlock the feature (enable calling number change on the trunk) and one key to specify the transformation (the correctly configured rule). On Huawei-style telephony systems, always pair the "enable" toggle with a precisely matched number rule; getting either wrong means the outgoing call still presents the wrong caller ID.

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