Ubiquiti Networks PowerBridgM - Manual (Page 23)

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Chapter 4: Wireless Tab airOS ™ v5.5.4 User Guide
Ubiquiti Networks, Inc.
Lock to AP MAC (Available in Station mode only.) This
allows the station to always maintain a connection
to an AP with a specific MAC address. This is useful as
sometimes there can be multiple APs using the same SSID.
Enter a MAC address in the Lock to AP MAC field, and the
station will lock to the AP with this specific MAC address
and not roam between several APs with the same SSID.
Hide SSID (Available in Access Point or AP‑Repeater
mode only.) When Hide SSID is enabled, the SSID (wireless
network name) will not be broadcast to wireless stations.
Country Code Each country has their own power level
and frequency regulations. To ensure the device operates
under the necessary regulatory compliance rules, you must
select the country where your device will be used. The IEEE
802.11 mode, channel and frequency settings, and output
power limits will be tuned according to the regulations of
the selected country.
IEEE 802.11 Mode This is the radio standard used for
operation of your device. 802.11b, 802.11a, and 802.11g
are older standards, while 802.11n is a newer standard
that provides higher capacity and better performance.
Options include:
•
A/N mixed Connects to an 802.11a or 802.11n network.
This mode offers better compatibility. A/N mixed mode is
selected by default on the following devices:
- M900 Series devices
- M3 Series devices
- M365 Series devices
- M5 Series devices
• B/G/N mixed Connects to an 802.11b, 802.11g, or
802.11n network. This mode offers better compatibility.
B/G/N mixed mode is selected by default on the
following devices:
- M2 Series devices
DFS (Only applicable to specific 5 GHz devices configured
with specific Country Codes.) Radar systems use specific
frequencies in the 5 GHz range. DFS (Dynamic Frequency
Selection) technology avoids interference with radar
signals. Depending on the regulations of the country
selected in the Country Code option:
• Specific 5 GHz devices may be allowed use of DFS
frequencies in the UNII‑2 band (5.25 ‑ 5.725 GHz) if they
use DFS technology.
• The DFS option may be available in airOS. If available,
then you can use this option to enable or disable DFS
functionality.
Before your device starts using a DFS frequency, it
may lose connection for 1 or 10 minutes during the
Channel Availability Check (CAC) time, depending on
the frequency. (In particular, weather radar frequencies,
5600 ‑ 5650 MHz, may have long wait times.)
If your device detects a radar on that frequency, it adds
this frequency to a blacklist for 30 minutes. If only one
frequency is on the Frequency List, then the device will
lose connection for 30-40 minutes after it detects the
radar. Also, any radio operating with Equivalent Isotropic
Radiated Power (EIRP) > 200 mW will lose connection for
30 minutes if it detects a radar.
Channel Width Displays the spectral width of the radio
channel. You can use this option to control the bandwidth
consumed by your link.
Using higher bandwidth increases throughput. Using
lower bandwidth:
• Reduces throughput proportional to the reduction in
channel size. For example, as 40 MHz increases possible
speeds by 2x, half spectrum channel (10 MHz) decreases
possible speeds by 2x.
• Increases the number of available, non-overlapping
channels, so networks can scale better.
• Increases the Power Spectral Density (PSD) of the
channel, so you can increase the link distance – more
robust links over long distances.
Available channel widths are device-specific. Supported
wireless channel spectrum widths include:
•
3 MHz The channel spectrum with the width of 3 MHz.
• 5 MHz The channel spectrum with the width of 5 MHz
(known as Quarter-Rate mode).
• 7 MHz The channel spectrum with the width of 7 MHz.
• 8 MHz The channel spectrum with the width of 8 MHz.
• 10 MHz The channel spectrum with the width of
10 MHz (known as Half‑Rate mode).
• 14 MHz The channel spectrum with the width of
14 MHz.
• 20 MHz The standard channel spectrum width of
20 MHz (selected by default).
Note: To connect standard Wi-Fi devices that use
the 2.4 GHz band, ensure that 20 MHz is selected.
• 25 MHz The channel spectrum with the width of
25 MHz.
• 28 MHz The channel spectrum with the width of
28 MHz.
• 30 MHz The channel spectrum with the width of
30 MHz.
• 40 MHz The channel spectrum with the width of
40 MHz.
• Auto 20/40 MHz (Available in Station mode only.)
Offers better compatibility.