Aastra 9133i - Transfer; Unannounced Transfer; Announced Transfer

Model 9133i SIP Admin Guide 20
Firmware Upgrade
4. In the TFTP server IP field enter the IP address of the computer hosting the
TFTP server.
5. After entering the information into the appropriate fields click on the
“Download Firmware” button. This starts the upgrade process. If the
upgrade is successful you are presented the successful message.