D-Link DIR-878 User Manual page 53

Section 3 - Configuration
Channel Width:
For the 2.4GHz band:
Select Auto 20/40 MHz if you are using both 802.11n and non-802.11n
wireless devices, or select 20 MHz if you are not using any 802.11n
wireless clients.
For the 5GHz band:
Select Auto 20/40/80 MHz if you are using 802.11ac, 802.11n, and
non-802.11n wireless devices, or select Auto 20/40 MHz if you are
using both 802.11n and non-802.11n wireless devices.
HT20/40
Enable this option to reduce interference from other wireless networks
Coexistence in your area. If the channel width is operating at 40MHz and there
(2.4 GHz only)
is another wireless network's channel over-lapping and causing
interference, the router will automatically change to 20MHz.
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 66).
Click Save when you are done.
D-Link DIR-878 User Manual 49