AudioCodes 400HD Series - Upgrade the Phone to Teams Compatible Transition Firmware; Generate Configuration on the Phone

Administrator's Manual F. Switching Devices from Teams Compatible to Teams Native Mode
Version 3.4.4 227 400HD IP Phones Series - Teams Compatible
Example:
F.4 Upgrade the Phone to Teams Compatible Transition
Firmware
1. Go to Monitor > Device Status.
2. Upgrade the phone to firmware version UCC450HD_3.4.5.2 (or later) by clicking
Actions > Update Firmware.
F.5 Generate Configuration on the Phone
1. After the phone completes the upgrade to UCC450HD_3.4.5.2 (or higher), set the
switching provision by clicking Actions > Generate Configuration.