D-Link Wireless AC1200 User Manual page 57

Section 3 - Configuration
Visibility Status: The default setting is Visible. Select Invisible if you do not want to
broadcast the SSID of your wireless network.
Schedule:
Use the drop-down menu to select a schedule for enabling the rule.
The schedule may be set to Always Enable, or you can create your
own schedules in the Schedules section (refer to page 71).
Click Save when you are done.
D-Link DIR-850L User Manual 52