An administrator needs to strip the leading 9 from outbound calls on an IOS Voice Gateway, and ensure that the system handles 911 emergency calls. Which configuration is needed to accomplish this task? A. B. C. D.
Answer D
A - incorrect- rule2 is to late, already stripped
B - rule2 wrong \1 is for argument (.*\), not 0
C - rule2 wrong, no argument /&/ is known to me or by guide
router#sh run | se voice translation-rule 20
voice translation-rule 20
rule 1 /9911/ /911/
rule 2 /^9\(.*\)/ /\1/
router#test voice translation-rule 20 95554444333
Matched with rule 2
Original number: 95554444333 Translated number: 5554444333
router#test voice translation-rule 20 9911
Matched with rule 1
Original number: 9911 Translated number: 911
D is correct. The first rule will match 9911 and send it as 911. If that rule is not matched, rule 2 will match "9anything" and send it without the leading 9.
Actually the first rule can match 9911 and 911, since the "?" means occurrences from zero to any times. However, I could not agree more with you that D is correct.
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