ProSoft Technology RLX2-IHNF-WC User Manual
Page 201
RLX2 Industrial Hotspot Series
ProSoft Technology, Inc.
Page 201 of 212
June 15, 2015
MAC table, only the 802.11 radios that have had their MAC addresses added to the
network’s MAC table are able to get on the network.
Master device
Device that is connected to the Master radio.
Mbps
Megabits per second, or millions of bits per second. A measure of bandwidth.
Megahertz
A measure of electromagnetic wave frequency equal to one million hertz. Often
abbreviated as MHz and used to specify the radio frequency used by wireless devices.
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.