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Ranger keeps all your Global DID/DDI and EXT number ranges in one place so that your Lync/Skype for Business operations team regardless of their physical location, all work with the same up-to-the-second information at the same time. This greatly reduces the risk of misconfiguration during Lync/Skype for Business user and service provisioning operations.
Ranger also includes an API for provisioning system orchestration and automation. The API is accessed through PowerShell and can return the next available number in the matching range and reserves it for 90 minutes so that the same number can’t be given out as a duplicate under heavy provisioning loads. Using the PowerShell commands you can easily automate your existing user provisioning.