Lumen help
If you're a toll-free customer and want to know if callers are unable to get in contact with you, you can create a filter for incomplete call traffic and then create a report to get your results. These types of calls are identified by looking at data that shows calls with no time duration. Usage Analyst data is about three to four hours behind current time.
To check for incomplete call traffic:
The zero duration filter should appear in the filter list. If it doesn't, click the checkbox next to the report you want to run, then click either View Report or Order Report.
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