Dial Plans
The dial-plan object in Lync is responsible for normalization of numbers, which is the process of taking a set of numbers that a user enters and converting the numbers to some other format. The dial plan does not control what numbers a user can call or dictate where a call is sent. Each user enabled for Enterprise Voice is assigned a dial plan, which contains an ordered list of normalization rules that are processed from top to bottom looking for a matching rule.
The first step in placing a Lync call is to normalize the digits a user has entered to the E.164 format. Since regions and countries all dial numbers differently, this ensures that all numbers are in an equivalent format before any decisions on how the call is to be routed ...
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