300-070 · Question #21
Which discard digits instruction removes all digits prior to the North American Numbering Plan portion of the route pattern?
The correct answer is B. PreAt. In CUCM route patterns, the @ symbol is a wildcard that represents the entire North American Numbering Plan (NANP) - it matches all valid NANP numbers. The PreAt discard instruction removes all digits dialed before the @ symbol, leaving only the NANP-compliant portion of the…
Question
Which discard digits instruction removes all digits prior to the North American Numbering Plan portion of the route pattern?
Options
- APreDot
- BPreAt
- CPre
- DPreNANP
How the community answered
(37 responses)- A3% (1)
- B92% (34)
- C5% (2)
Explanation
In CUCM route patterns, the @ symbol is a wildcard that represents the entire North American Numbering Plan (NANP) - it matches all valid NANP numbers. The PreAt discard instruction removes all digits dialed before the @ symbol, leaving only the NANP-compliant portion of the number to be forwarded. This is useful when the route pattern includes a prefix or access code followed by @, and you only want to pass the core NANP digits to the next system. PreDot removes digits before a dot separator, not before the NANP wildcard.
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