This document shows you how to change your Grandstream phone configuration so that the clock automatically changes based on Daylight Savings Time.
On your phone's LCD screen you will see an IP address, enter this into a web browser and login using your administration password - this is normally admin.
Once logged in, you will see the Grandstream configuration screen.
Click on Basic Settings.
Scroll down to the lower section of the screen, you will see some options which relate to the time settings on the phone.
Ensure that your settings are set as above, then click on Update and choose to Reboot the phone.
Your phone will then reboot, and the new time settings will be applied - the LCD clock should then display the correct time.