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How to create a Dial Plan Skype for business

What’s a Dial Plan For?
A dial plan is a named set of normalization rules that translates phone numbers for a named location, individual user, or contact object into a single standard (E.164) format for purposes of phone authorization and call routing. 

How to create Dial Plan on Skype for business:

Set-CsDialPlan –Identity Global -DialinConferencingRegion "India"

How to create Dial-In Number:

New-CsDialInConferencingAccessNumber -DisplayName "IND" -PrimaryUri "" -DisplayNumber "+912 345 0000" -LineURI tel:+ 912 345 0000 -PrimaryLanguage EN-US -Pool -Regions ind