D-Link DIR-878 User Manual page 117

DIR-878 AC1900 MU-MIMO Wi-Fi Gigabit Router
Configuring via Web-based Interface
User Manual
The following fields are available on the page:
Parameter Description
The channel bandwidth for 802.11n standard in the 2.4GHz band
(the 2.4 GHz tab).
20 MHz: 802.11n clients operate at 20MHz channels.
20/40 MHz: 802.11n clients operate at 20MHz or 40MHz channels.
The channel bandwidth for 802.11n and 802.11ac standards in 5GHz
Bandwidth band (the 5 GHz tab).
20 MHz: 802.11n and 802.11ac clients operate at 20MHz channels.
20/40 MHz: 802.11n and 802.11ac clients operate at 20MHz or
40MHz channels.
20/40/80 MHz: 802.11ac clients operate at 20MHz, 40MHz, or
80MHz channels.
Available on the 2.4 GHz tab.
Move the switch to the right to let the router to automatically choose
the most suitable channel bandwidth (20MHz or 40MHz) for the
Autonegotiation
connected devices (this setting can substantially lower the data
20/40 (Coexistence)
transfer rate of your wireless network). The switch is displayed when
the 20/40 MHz value is selected from the Bandwidth drop-down
list.
TX power The transmit power (in percentage terms) of the router.
Available on the 2.4 GHz tab.
The 802.11b and 802.11g protection function is used to minimize
collisions between devices of your wireless network.
Select a value from the drop-down list.
Auto: The protection function is enabled and disabled automatically
B/G protection
depending on the state of the network (this value is recommended if
your wireless local area network consists of both 802.11b and
802.11g devices).
Always On: The protection function is always enabled (this setting
can substantially lower the efficiency of your wireless network).
Always Off: The protection function is always disabled.
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