D-Link xStack DGS-3600 User Manual page 320

Technical Support
You can find software updates and user documentation on the D-Link website.
Tech Support for customers within South Eastern Asia and Korea:
D-Link South Eastern Asia and Korea Technical Support over the Telephone:
+65-6895-5355
Monday to Friday 9:00am to 12:30pm, 2:00pm-6:00pm Singapore Time
D-Link Technical Support over the Internet:
email:support@dlink.com.sg