PLANET VIP-350PT - Manual (Page 166)

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Example 3
The following dial plan:
R1408([2_9].r5|[2_9].r6)|R9^(911|.r4)|X(1900|1888)
consists of the following rules:
z R1408([2_9].r5|[2_9].r6) : The prefix 1408 will be added to any call numbers with seven or eight
digits where the leading digit is in the range of 2 to 9. For example, 5551234 will become
14085551234, but 555123 does not match this rule.
z R9^(911|.r4) : The prefix 9 will added to any numbers except 911 and five-digit numbers. For
example, 911 will still be 911, and 51234 will still be 51234.
z X(1900|1888) : There will be no calls or call forwarding to numbers beginning with 1900 or 1888.