There are some numbers which are never to be called. Such numbers are added to DNC (Do Not Call) list. To check such number if they are in DNC list or not follow the steps below.
How to check DNC numbers
Tag: DNC
How to setup DNC with Expiry
DNC is a list of numbers which can be uploaded to the dialer so that agents cannot dial those numbers . In case if agents wants to dial those numbers after certain date you can add these numbers with the expiry period in days. The number will be available in the campaign after the expiry period to dial again.