User's Manual

Support, Service & Warranty RLX2 Series ♦ 802.11a, b, g, n
User Manual Industrial Hotspot
MIC
Message Integrity Check. One of the elements added to the TKIP standard. A
"signature" is added by each radio on each packet it transmits. The signature is
based on the data in the packet, a 64-bit value (key) and the MAC address of the
sender. The MIC allows the receiving radio to verify (check) that the data is not
forged.
MIMO
Multiple Input Multiple Output refers to using multiple antennas in a Wi-Fi device
to improve performance and throughput. MIMO technology takes advantage of a
characteristic called multipath, which occurs when a radio transmission starts out
at Point A and the reflects off or passes through surfaces or objects before
arriving, via multiple paths, at Point B. MIMO technology uses multiple antennas
to collect and organize signals arriving via these paths.
Modbus
The Modbus protocol provides the internal standard that the MODICON
®
controllers use for parsing messages. During communications on a Modbus
network, the protocol determines how each controller will know its device
address, recognize a message addressed to it, determine the kind of action to be
taken, and extract any data or other information contained in the message. If a
reply is required, the controller will construct the reply message and send it using
Modbus protocol.
Modem
Stands for MODulator-DEModulator, a device that converts digital signals to
analog signals and vice-versa. Analog signals can be transmitted over
communications links such as telephone lines.
N
Network
A series of stations or nodes connected by some type of communication medium.
A network may consist of a single link or multiple links.
Node
An address or software location on the network.
Non-Occupancy Period
The time during which a radio cannot return to a frequency where radar was
detected. This time is typically 30 minutes. Typically a radio will not return to a
channel where radar was previously detected unless absolutely necessary.
Null Modem Cable
A specialty cross-communication cable with female connectors on each end used
for direct connection between devices when no modems are present. Commonly
used as a quick and inexpensive way to transfer files between two PCs without
installing a dedicated network card in each PC.
Page 152 of 161 ProSoft Technology, Inc.
November 29, 2012