Digit Matching
- Kelli Higdon
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The IMG 2020 utilizes digit matching for number selection and validation by matching on a specific digit string within a dialed or originating number. Digit matching is available for all types of translation tables and when a translation table is created that includes more than one entry, the IMG 2020 selects the most specific digit string match. When a call is received at the IMG 2020, the IMG 2020 searches the entries in a specified translation table until it finds a match for the digit string and all applicable call parameters (Based on the values in the String to Match and String fields). When it finds a match, the IMG 2020 performs the associated translation or error detection.
To prevent unmatched calls from failing, define a match string for each Translation Table that will match all numbers. For example: &.Â
Sort Order in Translation and Routing Tables
Dialed number strings in a translation tables or route table are sorted according to a set of rules configured in the IMG 2020. The table below displays the rules for sorting through a translation or route table. The order in which the entries within a translation or routing table are accessed are displayed in the table below.
Rules for sorting entries in a translation or routing table |
|---|
Entries are first sorted from highest to lowest. (9 - 0) |
Entries are then sorted from most specific to least specific. (For example: 9 is selected before 9&) |
Entries are then sorted from shortest to longest on identical matches. (For example: 99 is selected before 999) |
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Below is an example displaying twelve entries in a translation or routing table and how they would be sorted.
Entry ID: | Entry in translation table |
|---|---|
Entry ID: 2 | Dialed Number = 8888 |
Entry ID: 18 | Dialed Number = 8331 |
Entry ID: 19 | Dialed Number = 5828 |
Entry ID: 8 | Dialed Number = 55555 |
Entry ID: 11 | Dialed Number = 5551 |
Entry ID: 1 | Dialed Number = 5348 |
Entry ID: 14 | Dialed Number = 5347 |
Entry ID: 5 | Dialed Number = 5088623000 |
Entry ID: 4 | Dialed Number = 5& |
Entry ID: 9 | Dialed Number = 3778 |
Entry ID: 13 | Dialed Number = 3777 |
Entry ID: 0 | Dialed Number = 3&Â |
Digit Matching Examples
The table below displays several examples of digit matching. Once the string is matched to an entry in the translation or routing table, it can then be used for routing the call or translating the number. The IMG 2020 has a set of wildcard characters that can be used in place of numbers to aid in matching or translating a number. Refer to the topic for information
Incoming Number to match | Entries in Translation Table | Matched String | Description |
|---|---|---|---|
5088623200 | Entry 1 - 5088623200 | 5088623200 | Exact Match. |
5087783000 | Entry 1 - 5088623200 | 508xxx3000 | Matched string can be any number where the first three digits are 508, the next three can be any value and the last four digits are 3000. |
5088622400 | Entry 1 - 5088623200 | 508862& | Matched string can be any number where the first six digits are 508862. The remaining digits are any value. |
5083859999 | Entry 1 - 5088623200 | 508& | Matched string can be any number where the first three digits are 508 and the remaining digits are any value |
5088623000 | Entry 1 - 5088623200 | 508& | Matched string can be any number where the first 3 digits are 508 and the remaining digits are any value  |
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