Installation & Operation Manual 456 Document # LTRT-92224
Mediant 8000
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37.7 Dial Plan Prefix Tags for IP-to-Tel Routing
This feature enables the VoIP board to support the use of string labels (or "tags") in
the external Dial Plan file for tagging incoming IP-to-Tel calls. The special "tag" is
added as a prefix to the called party number, and then the "IP to Telephone/Inbound
Routing Table" uses this "tag" instead of the original prefix. Manipulation is then
performed after routing in the "Destination Phone Number Manipulation Table for IP to
Tel calls", which strips the "tag" characters before sending the call to the endpoint.
This feature resolves the limitation of entries in the "IP to Telephone/Inbound Routing
Table" for scenarios in which many different routing rules are required. For example, a
city may have many different area codes, some for local calls and others for long
distance calls (e.g. 425-202-xxxx for local calls; however 425-200-xxxx for long
distance calls).
For using tags, the dial plan file is defined as follows:
Number of dial plan (text)
Dial string prefix (ranges can be defined in brackets)
User-defined routing tag (text)
1. Configure the dial plan routing tags:
a. Open a text file using a text editor.
b. Define an external Dial Plan file similar to the example configuration below:
In this example configuration, multiple prefixes exist for local and long
distance calls, where the following two routing tags are used:
♦ "LOCL" - for local calls
♦ "LONG" - for long distance calls
[ PLAN1 ]
42520[3-5],0,LOCL
425207,0,LOCL
42529,0,LOCL
425200,0,LONG
425100,0,LONG
When an incoming IP call to destination prefix 425203 (for example) is
received, the device adds the prefix tag "LOCL" (as specified in the Dial Plan
file), resulting in the number "LOCL425203".
Specify a separate plan number for each Dial Plan you wish to configure i.e.
PLAN1, PLAN2 etc.
2. Assign the tag prefixes to trunk groups:
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