XIII. IPPBX

VigorBX 2000 - Digit Map Examples

Products:
VigorBX 2000
Keywords:
999
Emergency
Local Calls
PSTN
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The DrayTek VigorBX 2000 uses Digit Map to route outbound calls based on the number dialled. This checks the number dialled against the Digit Map entries in order, from the first entry to the last entry with the PBX routing the call based on the first match.

When a number is dialled, the PBX checks the length of the number of the Prefix / first digits of the number to check against Digit Map entries with these options available:

  • Match Prefix - The number specified here is checked against the leading digits of the number dialled to check for a match
  • Method - The action performed upon the number in addition to routing the call through the selected Trunk
  • Operand Number - This number is used to modify the prefix number depending on the Action selected
  • Min / Max Length - This is the minimum and maximum length of the number that the Digit Map entry applies to. If the number specified is longer or shorter than the specified numbers, this rule is not applied to that call
  • Trunk - The Trunk that the call is routed through
  • Backup Trunk - This is used when the Trunk selected is unregistered or detected as unavailable
  • Move Up / Move Down - This changes the order of the entry. Entries at the top are processed before and have higher priority than lower rules

If the number length dialled and prefix dialled match a Digit Map entry, it would then perform a Method action based upon the Digit Map entry's configuration:

  • None - Does not alter the number dialled and simply routes the call
  • Add - Routes a call based on the Trunk selected and adds the specified Operand Number as a Prefix (i.e. adding a local area code)
  • Strip - Routes a call based on the Trunk selected and removes the prefix of the Operand Number specified (i.e. dialling "9" to use a trunk, this removes the "9" digit)
  • Replace - Routes a call based on the Trunk selected and replaces the Prefix Number with the Operand Number (i.e. dial "7" and the PBX would add the prefix of "0207" to the number dialled)

If there is no match or if there is no digit map configured, the PBX system will route calls based on the Extension's Default Trunk setting. If that isn't configured or is unavailable, the call will not be routed and the Extension will be unable to call out.

It is possible to bypass the Digit Map configuration by dialling a Trunk specifically, for instance dialling "001" to select the first SIP Trunk then dialling the number.


This guide demonstrates how to configure the Digit Map entries to perform possibly useful functions such as adding a local area prefix to short local numbers.

To configure a Digit Map entry, go to [IP PBX] > [Dial Plan] > [Digit Map]:


All Calls through specified Trunk

To force all calls to go through a specified Trunk interface, set the Min and Max Length values so that they would cover any calls made through the system, in this example 1 to 15 digits.

For the Match Prefix, specify that as "?" which is the wildcard character. This means that any number between 1 and 15 digits in length would go through SIP-1-DrayTEL trunk in this example.

The wildcard character with no other prefix is effectively a "catch-all" rule; this should be placed after all other Digit Map entries so that other Digit Map entries are still processed.


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