CTIOS Custom agent desktop developers should be aware of a defect fixed in CTIOS 7.5(7) and later:
Intermittently, after an agent performs a Network Blind Transfer, the desktop client gets stuck in talking state and/or the transfer buttons get grayed out preventing the agent from performing transfer in future.
Any peripheral type where Network Blind Transfers are involved.
Agents have to logout and log back in again if they want to perform another transfer in future.
the bug is CSCta71582 Out of order events in OPC after a xfer cause CTIOS client to get stuck