ProSoft Technology RLX-IFH9E-A - Manual (Page 93)

RLX-IFHE ♦ RadioLinx Industrial Wireless Reference
RadioLinx® Industrial Frequency Hopping Ethernet Radios User Manual
ProSoft Technology, Inc. Page 93 of 109
November 19, 2013
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.
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.
P
Panel Antenna
An antenna type that radiates in only a specific direction. Panel antennas are
commonly used for point-to-point situations. Sometimes called Patch antennas.
Parabolic Antenna
An antenna type that radiates a very narrow beam in a specific direction.
Parabolic antennas offer the highest gain for long-range point-to-point situations.
Peer-to-Peer Network
Each radio in a Peer-to-Peer network has the ability to receive data from - and
transmit data to - any other radio in the network.
Point-Multipoint (Broadcast) Network
A network type where a single master radio sends data to every remote radio in
the network. This is done repeatedly until every remote radio individually receives
and acknowledges the data. Each remote radio sends pending data to the
master radio that receives and acknowledges data sent from each remote. In this
configuration, there are multiple remote radios referenced to a single master
radio.
Point-Multipoint (Modbus) Network
A network with a single Master radio and multiple Remote radios. The devices
cabled to the radios communicate through the Modbus standard protocol. The
Master radio sends data to a Remote radio based on the Modbus address of the
Modbus device. The data is only sent to the single Remote device based on its
address. Each Remote radio sends its data only to the Master radio. The Master
and Remote radios acknowledge that data was received correctly.