Which of the following number change operations are supported on the U1900 series unified gateway?

Question

Options

• ADelete digits by number type
• BChange numbers by user level
• CDelete digits by number length
• DDelete digits by call source

• A
  9% (2)
• B
  4% (1)
• C
  83% (19)
• D
  4% (1)

Explanation

On the U1900 series unified gateway, deleting digits by number length (C) is a supported number manipulation operation - the gateway can strip a specified number of digits from the front or back of a dialed string based on how many digits the number contains, which is a standard digit manipulation feature in voice gateways for routing flexibility.

Why the distractors are wrong:

• A (Delete by number type) - the U1900 does not filter digit deletion based on abstract number "types" (e.g., local vs. long-distance classification); that is not a supported parameter for this operation.
• B (Change numbers by user level) - number translation on the U1900 is not conditioned on user privilege levels; user-level-based routing is a different feature domain.
• D (Delete by call source) - while the U1900 can apply different dial plans to different interfaces, "call source" is not a direct parameter for the digit-deletion operation itself.

Memory tip: Think "LENGTH = digits you can COUNT" - the U1900's digit manipulation ties to something measurable and dial-plan-neutral (how long the number string is), not to abstract categories like type, source, or user rank.

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