Yealink SIP-T48G Administrator's Manual page 116

Administrator's Guide for SIP-T2_Series_T4_Series IP Phones
Select the desired values of DST Start Month, DST Start Week of Month, DST Start
Day of Week, Start Hour of Day; DST Stop Month, DST Stop Week of Month, DST
Stop Day of Week and End Hour of Day from the pull-down lists.
7. Enter the desired offset time in the Offset (minutes) field.
8. Click Confirm to accept the change.
To configure the time and date manually via web user interface:
1. Click on Settings->Time & Date.
2. Select Enabled from the pull-down list of Manual Time.
3. Enter the time and date in the corresponding fields.
4. Click Confirm to accept the change.
To configure the time and date format via web user interface:
1. Click on Settings->Time & Date.
2. Select the desired value from the pull-down list of Time Format.
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