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Dial Type
Digits Dialed
Dial Plan
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Internal Extension
A four digit number
xxxx
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Emergency
911
911
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Local Operators
9 (if required for an outside line) then 0
90T
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Local Number
9 (if required for an outside line) and then a seven digit number
9xxxxxxxT
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Long Distance
9 (if required), 1, area code and local number
91xxxxxxxxxx
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International
9 (if required), 011, then any number of additional digits (at least one)
9011x.T