Medias Mediatrix 1204, Reference Manual

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Chapter 21 - Digit Maps Special Characters
244 Mediatrix 1204
The solution to this problem is to load the Mediatrix 1204 with a digit map that corresponds to the dial plan.
A Mediatrix 1204 that detects digits or timers applies the current dial string to the digit map, attempting a match
to each regular expression in the digit map in lexical order.
If the result is under-qualified (partially matches at least one entry in the digit map), waits for
more digits.
If the result matches, dials the number.
If the result is over-qualified (i.e., no further digits could possibly produce a match), sends a fast
busy signal.
Special Characters
Digit maps use specific characters and digits in a particular syntax. Those characters are:
How to Use a Digit Map
Let’s say you are in an office and you want to call a co-worker’s 3-digits extension. You could build a digit map
that says “after the user has entered 3 digits, make the call”. The digit map could look as follows:
xxx
You could refine this digit map by including a range of digits. For instance, you know that all extensions in your
company either begin with 2, 3, or 4. The corresponding digit map could look as follows:
[2-4]xx
If the number you dial begins with anything other than 2, 3, or 4, the call is not placed and you get a busy signal.
91xxxxxxxxxx Long distance numbers
9011 + up to 15 digits International number
Table 156: Number Examples (Continued)
Number Description
Table 157: Digit Map Characters
Character Use
Digits (0, 1, 2... 9) Indicates specific digits in a telephone number expression.
T The Timer indicates that if users have not dialed a digit for the time defined, it is likely
that they have finished dialing and the SIP Server can make the call.
x Matches any digit, excluding “#” and “*”.
| Indicates a choice of matching expressions (OR).
. Matches an arbitrary number of occurrences of the preceding digit, including 0.
[ Indicates the start of a range of characters.
] Indicates the end of a range of characters.