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| What
is the field tested throughput of MeshDynamics MD4000 mesh nodes?
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| The standard MD4000
products use a 5GHz backhaul and 2.4GHz radios for
client service. Tests conducted by US government labs
indicate 54 Mbps raw and approx 22 Mbps
TCP/IP. Those numbers
are approximated doubled in turbo mode with channel
bonding. Tests were conducted over
four hops. There was no appreciable degradation due
to MeshDynamics Third-Generation technology that allows bandwidth to be conserved over
multiple relay or "hops". All MD4000 products employ two backhaul radios operating on non-interfering
channels to preserve throughput. Channel management is automatically managed
at each node.
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| What
is the maximum data traffic distribution supported
emanating from a one wired Ethernet link? |
| Approx 80 Mbps TCP/IP in
non turbo mode with the MD4454. The
MD4454 has all four radios
configured as 802.11a downlinks. The four radio root node would be powered
by one Ethernet link. Note: For applications requiring less
backhaul capacity consider MD4452 - it supports two downlinks
and as a root node
provides 44 Mbps TCP/IP. The
MD4350 (one
downlink) provides 22 Mbps TCP/IP . |
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| What
is the typical range (node to node distance)? |
| Range is dependant on antenna gain, radio transmit power, radio receive
sensitivity, obstructions and RF interference in the environment. It
is also dependant on the data rate sought - the range
is significantly more at 6 Mbps than 20 Mbps data rates. Range
also depends on whether a 5GHz
backhaul or 2.4GHz backhaul is used. At a throughput of 20-22 Mbps TCP/IP, with 5GHz radios and 8 dB antennas
400-500 m range is commonplace. 14 miles has been
achieved with specialized antennas [More]
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| What
is the typical range of the AP radio (node to client distance)? |
| With an 8dBi
omni-directional antenna on the AP radio, clients can
associate (on 802.11b/g) from 300 meters
provided the client is in line of site with the mesh
node. If the client device in not in line
of site, the distance decreases to 100-150 meters. Range depends on
connectivity modes.
Clients on 802.11b can achieve twice the range of
802.11g mode. [More]
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| What is the power consumption for the MeshDynamics MD4000 mesh nodes? |
MD4000 mesh node
configurations support from two to four active radios in
the same enclosure .The processor consumes around 8 W.
Each active radio uses approx 2 W to produce 400 mw
output power. Power consumption varies
from 12 W (two radios) to 16 W (four active
radios).
Note: the components on the MD4000 board run on 3.3V
(nominal), so there is a DC-DC converter on the
board. The input voltage range supported is 9-48 volts.
If the RJ45 Ethernet port is
used to provide Power over Ethernet (POE), then the maximum
allowable current over the RJ45 leads is 1A. Higher
voltage POEs provide more power. The recommended POE is rated at
24V 2A.
A variant of the MD4000 board may also be powered
directly from low voltage portable battery packs. [More] |
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| What are the
dimensions and weight of the MD4000 mesh nodes? |
| The
weatherproof die
cast aluminum enclosure is 8" long by 6" width
by 2" deep. The unit weighs 3 lbs. [Images] |
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| What
is the default MeshDynamics MD4000 configuration ? |
| The MD4350-AAIx is our
most commonly requested configuration. This is a three-radio mesh node that
uses two of its radios for the 5GHz, 802.11a
multi-channel backhaul. The third radio is a
2.4GHz Access Point (AP). [MD4000
Numbering Scheme] |
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| Does
the MeshDynamics MD4000 configuration support multiple access point
radios (AP)? |
| Yes. The MD4458-AAII has two access point (AP) radios. The
MD4458-AIII has three AP radios and no downlink.[More] |
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| Does
MeshDynamics offer a backhaul-only configuration for perimeter
video surveillance? |
| Yes. Where client
access is not required, The
MD4250-AAxx two-radio (5Ghz uplink and downlink radios)
is suggested. As with all MD4000 mesh nodes, wired clients such as IP cameras
may plug directly into one of two Ethernet port. [More] |
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What does MeshDynamics recommend for antenna selection
and alignment techniques?
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Antenna selection and alignment is critical to
establishing a reliable RF link. Also MeshDynamics 5GHz
radios need antennas that support a range from 5.25GHz to
5.85GHz. Superpass
antennas are recommended.
The antenna type (omni or sectored) is driven by range and throughput requirements . Some general
suggestions are provided here. Please
feel free to contact Technical Support
to explore which model
and antenna combination is best for your application.
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How are unusually-shaped meshes handled by the MD4000
mesh node?
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Relay nodes equipped with two downlink radios allow a
"shaping" of the mesh by having the ability to
shoot downlink signals in separate directions. This
is especially helpful in geographical bottlenecks. [More]
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