Wallboard for queues is not showing the same number of calls as in the Detailed Transactions Activities report.
Virtual Contact Center, Wallboard, Reports
The Detailed Transactions Activity report has the transactions for all calls within Virtual Contact Center. Filter out the transactions that are not associated with a queue.
If the Wallboard is not displaying Voicemail calls, then filter out the Voicemail transactions in the Detailed Transactions Activity report.
There are call transactions that are not flowing into VCC from the phone queues.