From the Dashboard, click on Reports and select Agent Monitor from the drop down.
In the Agent Monitor, you can see the below dropped call data.
OUTBOUND CALLS TODAY: Total Number of Leads Dialed by the system
OUTBOUND DROPPED: OUTBOUND DROPPED/ OUTBOUND CALLS TODAY
OUTBOUND (DROPPED/ PLACED): DROPPED=Number of Dropped Calls PLACED: Number of Outbound Calls Received by the Agents.