Lumen help
DNIS lets you know which phone number your customer called to reach you and is useful in a variety of circumstances. For example, if you're operating a call center, you could set up your switch to recognize the DNIS of an incoming call and play the appropriate greeting for the product associated with the toll-free number.
To create the DNIS information for a toll-free number:
Important: After you schedule the changes, you cannot edit the plan until the pending changes are activated. You can check the status of the request by selecting Job List from the More Actions list.
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