It is important that your telephone calls are made from HubSpot :
the system allows you to make calls directly from a file: this makes it easier,
your calls are recorded along with the day and time, which makes it easier to track the history of the file,
you can indicate the result of your call (interested, not interested, unreachable, etc.), which makes it possible to draw up more reliable statistics for subsequent monitoring of these contacts
To do this, you need to :
have your RingOver account,
have synchronised this account with your HubSpot account