Appendix63You can upgrade your base station to the latest firmware version. The latest firmwareversion not only improves the performance of the base station, but also provides morefeatures compared to the previous version. This section provides you with instruction onupgrading the base station via web user interface. For more information on upgradingthe base station via auto provisioning, refer toYealink W52P IP DECT Phones AutoProvisioning Guide.To upgrade the base station firmware, contact your system administrator for the latestfirmware file, and store it on your local system in advance.To upgrade base station firmware via web user interface:1. Click on Phone->Upgrade.2. In the Select and Upgrade Base Firmware field, click Browse to locate the firmwarefile from your local system.3. Click Upgrade to upgrade the firmware of the base station.The browser pops up the dialog box “Firmware of the SIP Phone will be updated. Itwill take 5 minutes to complete. Please don't power off!”.4. Click OK to confirm upgrading.The upgrading process will take a few minutes. The power indicator LED on thebase station flashes when the base station is during the firmware upgradingprocess.Once the base station firmware has been successfully upgraded, the base stationreboots automatically. The handset will perform an auto registration to the base station.You can check the firmware version of the base station using the handset. For moreinformation, refer to Checking System Status on page 18.Note Do not refresh or close the browser during the upgrading process of the base station.