Cisco Unified Border Element (CUBE) is licensed per session and requires a two-way session. For more information, see Cisco Unified Border Element Data Sheet.
CUBE license sizing is the sum of the number of agent sessions and the number of calls at the Interactive Voice Response (IVR). Use the Cisco Unified Border Element Data Sheet to determine the maximum number of sessions that your CUBE platform supports.
The number of licenses should be equal to the maximum capacity of the enterprise.
licenses = (number of agents X 2) + (number of active sessions in queue)
At peak time if you have 100 agents responding to customer calls, each call has two active sessions. The number of sessions is 200.
The number of calls in queue in this instance is 100, which creates 100 sessions.
Therefore, the total number of sessions equals 300 which is 300 licenses.