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Though easy to use, this method is cumbersome to employ for a large number of DIDs,
so you will need to use an alternate method. The method chosen will depend on the
numbering scheme of the DID numbers themselves. When the ending digits of the
DIDs form a definite pattern that can lend itself to correlate with extension numbers,
you simply need to enter a single string into the trunk's Send call to extension field.
The only requirement here is that the ending digits must begin with a 4 or higher
(extension numbers should stay within the range from 4xx through 7xx to keep from
overlapping with Direct Destinations numbers).
If the last 3 or 4 digits of a block of DIDs begin with a 1, 2, or 3 (e.g., 100, 101, etc.),
the ending digits cannot be used as the extension numbers. You will need to use the
workaround shown in Option 2.
Option 1: Clear pattern with a start number of 4 or higher
If you have a batch of DID numbers with a usable pattern on the ending digits, you
can easily use regular expressions in the Send call to extension setting. The system will
replace the 10-digit DID with the extension number. Table 4-3 displays a list of DIDs
that can be easily converted to 3- and 4-digit extensions using regular expressions.
Table 4-3.
Direct Inward Dialing Numbers with Usable Patterns
DIDs and 3-Digit Extensions
978 521-1400
978 521-1401
978 521-1402
978 521-1403
978 521-1404
978 521-1405
Follow the steps below:
1.
Create the regular expression.
2.
Place the string into the trunk's Send call to extension setting.
Chapter 4: Trunks
DIDs and 4-Digit Extensions
978 521-4100
978 521-4101
978 521-4102
978 521-4103
978 521-4104
978 521-4105
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