I have several GXP1625 IP telephones installed here. So I updated firmware to 18.104.22.168 and enabled Time and Date to these settings:
At my DHCP server I enabled these values:
But they are not working! (My Time Offset is -4UTC) so my device might have GMT -4 hour. Instead of it, it’s showing UTC Time.
Any ideas to solve it? I’d rather to work by this way, because we have a great number of these devices, and changing timezone manually one-by-one is hard. Here in Brazil the government change Daylight rules almost every year.