Creating Normalization Rules

Normalization rules are associated with a dial plan and provide a way for administrators to translate dial strings that users enter into full E.164 format. For instance, a country code and local area code might be automatically appended when a user tries to dial only seven digits. Many organizations use four- or five-digit internal extensions, and normalization rules can convert those dial patterns to a full E.164 number.

Administrators can define the normalization rules either using regular expressions or using the Normalization Rule tool. To create a new normalization rule, follow these steps:

1. On the Edit Dial Plan screen, click the New button in the Associated Normalization Rules section.

2. Provide a name for the rule and a description for the rule.

Note

This example uses the Normalization Rule tool, but for more advanced pattern matching, click the Edit button at the bottom of the screen to manually enter the matching pattern and translation rule using regular expressions.

3. In the Starting Digits field, enter the beginning digits of the string to be matched.

4. Specify a Length of the string to be matched. Options include matching at least a specific number of digits, exactly a certain number of digits, or any number of digits.

5. Specify a number of Digits to Remove after a string matches the starting digits and length. These digits will be removed from the left side of the number.

6. Specify Digits to Add after the selected number of digits have been removed.

7. If the pattern matches numbers that are internal to the organization, check the box Internal Extension.

8. Click OK to save the translation rule and click OK again to save the trunk configuration.

Note

The internal extension check box works in conjunction with the external access prefix specified on the dial plan and is specific to off-hook dialing from Lync Phone Edition (LPE) clients. Off-hook dialing refers to when a user either lifts the receiver or presses the speakerphone button before dialing. If an LPE client enters the external access prefix as the first digit during an off-hook dial, the client will skip all the rules flagged as an internal extension. This helps ensure that the user does not accidentally dial an internal extension because they entered digits too slowly.

The New-CsVoiceNormalizationRule cmdlet can also be used to create rules using the Lync Server Management Shell.

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