Aastra AastraLink Pro 160 Administrator's Manual page 117

AastraLink Web UI
Step Action
3 The "Time Zone" field is disabled by default, until you select a country in Step 2.
Select a Time Zone that maps to your location. Default is "Select a country". Valid values are:
41-001190-02 Rev. 01, Rel. 1.2
Configuring AastraLink Pro 160 System and Network Parameters
Configuring System Settings
4-7