Ubiquiti Networks PowerBridgM - Manual (Page 14)

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Chapter 3: Main Tab airOS ™ v5.5.4 User Guide
Ubiquiti Networks, Inc.
SSID Displays the wireless network name (SSID). The
wireless network name depends upon the wireless mode
selected:
• In Station mode, this displays the SSID of the AP the
device is associated with.
• In Access Point mode, this displays the SSID configured
on the device using the Wireless tab.
Security Displays the wireless security method being
used on the device. If None is displayed, then wireless
security has been disabled, although you can still use
RADIUS MAC authentication.
Version Displays the airOS software version.
Uptime This is the total time the device has been running
since the latest reboot (when the device was powered up)
or software upgrade. The time is displayed in days, hours,
minutes, and seconds.
Date Displays the current system date and time. The
date and time are displayed in YEAR-MONTH-DAY
HOURS:MINUTES:SECONDS format. The system date and
time is retrieved from the Internet using NTP (Network
Time Protocol). The NTP Client is disabled by default on
the Services tab. The device doesn’t have an internal clock,
and the date and time may be inaccurate if the NTP Client
is disabled or the device isn’t connected to the Internet.
Channel/Frequency Displays the channel number and
corresponding operating frequency. The device uses
the channel and radio frequency specified to transmit
and receive data. Valid channel and frequency ranges
will vary depending on local country regulations. If the
Channel/Frequency is labeled as “DFS”, then the device is
using a DFS (Dynamic Frequency Selection) channel. (DFS
channels/frequencies are not available on all devices.)
Channel Width This is the spectral width of the radio
channel used by the device. airOS v5.5 supports 3, 5, 7,
8, 10, 14, 20, 25, 28, 30, and 40 MHz; however, available
channel widths are device-specific. In Station mode, Auto
20/40 MHz is the value by default.
Distance Displays the current distance between devices
in kilometers and miles for Acknowledgement (ACK)
frames. Changing the distance value will change the
ACK (Acknowledgement) timeout accordingly. The ACK
timeout specifies how long the device should wait for
an acknowledgement from a partner device confirming
packet reception before it concludes that there has been
an error and resends the packet. You can adjust the
Distance value; for more information, see “Distance” on
page 50).
TX/RX Chains Displays the number of independent
spatial data streams the device is transmitting (TX)
and receiving (RX) simultaneously within one spectral
channel of bandwidth. This ability is specific to 802.11n
devices that rely on Multiple-Input Multiple-Output
(MIMO) technology. Multiple chains increase data transfer
performance significantly. The number of chains Ubiquiti
devices use is hardware-specific because every TX/RX
chain requires a separate antenna.
Antenna (Only applicable to the NanoStationM900 loco.)
The antenna type (Internal, External, or External + Internal)
is displayed. For more information, see “Antenna” on
page 21.
WLAN0 MAC Displays the MAC address of the device as
seen on the wireless network.
LAN0 MAC Displays the MAC address of the device as
seen on the LAN.
LAN1 MAC Displays the MAC address of the device
as seen on the WAN interface. This is the device’s MAC
address as seen over the Internet.
LAN0/LAN1 Indicates the current status of the WAN and
LAN Ethernet port connections. This can indicate that a
cable is not plugged into a device or there is no active
Ethernet connection.
AP MAC In Access Point or AP‑Repeater mode, this
displays the MAC address of the device. In Station mode,
this displays the MAC address of the AP the device is
associated with.
Signal Strength (Available in Station mode only.)
Displays the received wireless signal level (client-side).
The represented value coincides with the graphical bar.
Use the antenna alignment tool to adjust the device
antenna to get a better link with the wireless device. The
antenna of the wireless client has to be adjusted to get
the maximum signal strength. Signal Strength is measured
in dBm (the decibels referenced to 1 milliwatt). The
conversion is defined as dBm=10log10(P/1mW). So, 0 dBm
would be 1 mW and -72 dBm would be 0.0000006 mW.
A signal strength of -80 dBm or better (-50 to -70 dBm) is
recommended for stable links.
Chain or Horizontal/Vertical or External/Internal
(Vertical)
(Available in Station mode only.) Displays
the wireless signal level (in dBm) of each signal. Devices
with fixed antennas display Horizontal/Vertical instead of
Chain. When chains are displayed, the number of chains is
device-specific.
The NanoStationM900 loco displays External/Internal
(Vertical) if the Antenna option on the Wireless tab is set
to External + Internal (2x2). For more information, see
“Antenna” on page 21.
Connections (Available in Access Point or AP‑Repeater
mode only.) Displays the number of wireless devices
connected to the device.
Noise Floor Displays the current value (in dBm) of the
environmental noise (from interference) the receiver hears
on the operating frequency. airOS considers the Noise
Floor while evaluating the signal quality (Signal-to-Noise
Ratio SNR, RSSI). The value mean depends on the signal
strength above the Noise Floor.
Transmit CCQ This index evaluates the wireless Client
Connection Quality (CCQ). The level is based on a
percentage value for which 100% corresponds to a perfect
link state.