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EtherLinx
communication technology is a transparent 802.11 firmware and
software-defined radio (SDR) solution.
Through
the use of transparent software, firmware, and data networking
algorithms originally developed for counter-measures and electronic
surveillance techniques on US Military projects, EtherLinx has
developed a 802.11 based software product that enables a high-speed
wireless broadband capability.
At the same time mitigates the interference issue and
provides additional security layers superior to current 802.11 and
802.16 wireless
security methods.
EtherLinx
software technology utilizes direct sequence spread spectrum and a
proprietary direct sequence code division multiple access (DS-CDMA /
BPSK /QPSK / and CCK) for secure data transmission that prevents any
type of eavesdropping. EtherLinx transparent RF (Radio Frequency) signal, if
seen, appears as background noise. Even this detection can only be
accomplished with very expensive spectrum analyzers and these
devices would not be able to decipher the content or data carried by
the RF signal. A data
signal at the point of transmission is combined with a higher
data-rate bit sequence (also known as a chipping code) that divides
the data according to a spreading ratio.
EtherLinx transparent and redundant chipping code helps
the signal resist interference and also enables all of the original
data to be recovered if data bits are damaged or lost during
transmission. EtherLinx
direct sequence contrasts with the other spread spectrum processes
in that it is far more robust and can cover much longer distances
than competing DS (direct sequence) or FH (frequency hopping) spread
spectrum products available today.
Because
EtherLinx leverages the emerging standards set forth by 802.11 and
other RF technologies in the media access control layer and the
physical layer methods, including coding descriptions and
performance evaluations and scalable data rates, EtherLinx technology
provides for secure cost-effective wireless network solutions by
enabling intelligence in standard, low cost CPE (customer premise
equipment). Today spread spectrum is at the heart of the WiFi
standard and has been commercially accepted in the marketplace,
especially in local area wireless networks. 802.11b has become the
standard in WLAN, but as a result of this standard an inherit
weakness has evolved via the new standard " i.e.",
security issues.
It was found that anyone with this technology could join
other networks using the same 802.11 protocols and have access to
their data or eavesdrop on the traffic over these networks without
detection.
The
data networking algorithms used in the EtherLinx solution are the
most secure and advanced in the industry and were designed
specifically to prevent eavesdropping and/ or attacks by hackers.
Latency is minimized while allowing for the use of automatic
repeat request (ARQ) - a protocol for error control in data
transmission. When the receiver detects an error in a packet, it
automatically requests the transmitter to resend the packet.
This process is repeated until the packet is error free or
the error continues beyond a predetermined number of transmissions.
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