Employees at a company must dial 9 first to reach an external number. Which route pattern is used to route the call if a user dials the toll-free number 1-866-555-1212?

The correct answer is E. 9.1866[2-9]XXXXXX. The user dials 9 (outside-line access code), then 1-866-555-1212. The route pattern 9.1866[2-9]XXXXXX matches this sequence: '9.' strips the access digit, '1' matches the long-distance prefix, '866' matches the toll-free area code, '[2-9]' matches the first digit of the…

Gateway and Dial Plan

Question

Employees at a company must dial 9 first to reach an external number. Which route pattern is used to route the call if a user dials the toll-free number 1-866-555-1212?

Options

A9.18XX[2-9]XXXXXX
B9.18[0,5-8][0,5-8]XXXXXXX
C9.1XXXXXXXXXX
D9.1866XXXXXXX
E9.1866[2-9]XXXXXX
F9.1[2-9]XX[2-9]XXXXXX

How the community answered

(30 responses)

B
13% (4)
C
3% (1)
D
3% (1)
E
70% (21)
F
10% (3)

Explanation

The user dials 9 (outside-line access code), then 1-866-555-1212. The route pattern 9.1866[2-9]XXXXXX matches this sequence: '9.' strips the access digit, '1' matches the long-distance prefix, '866' matches the toll-free area code, '[2-9]' matches the first digit of the exchange (5, which is within range), and 'XXXXXX' matches the remaining six digits. Option C (9.1XXXXXXXXXX) would also match but is far too broad and would catch all 10-digit calls. Option E is the most specific pattern that correctly and exclusively matches 866 numbers, which is best practice in CUCM dial plan design to avoid unintended matches.

Topics

#route pattern#wildcard digits#toll-free number#access code

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