Yealink SIP-T48G Administrator's Manual page 115

3. Select the desired time zone from the pull-down list of Time Zone.
4. Enter the domain names or IP addresses in the Primary Server and Secondary
Server fields respectively.
5. Enter the desired time interval in the Synchronism (15~86400s) field.
6. Select the desired value from the pull-down list of Daylight Saving Time.
If you select Enabled, do one of the following:
Mark the DST by Date radio box in the Fixed Type field.
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Enter the start time in the Start Date field.
Enter the end time in the End Date field.
Mark the DST by Week radio box in the Fixed Type field.
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Configuring Basic Features
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