ICP DAS USA TDRS4050601 - Manual (Page 37)

Industrial Redundant Ring Switch – RS Series User Manual
TDRS4050601 b
Full Duplex A communication method where both ends can transmit and receive
simultaneously.
Half Duplex A communication method where one end transmits while the other
end receives, then reverses the process.
Hub A device for local area networks (LANs) that is used to interconnect
multiple devices over an internal bus.
Jitter Aka. phase jitter, caused by power line harmonics and perceived in
the form of minor phase changes.
Multi-Drop Line Aka. Multipoint Line, a data link supporting multiple DTE connections,
usually with one DTE controlling the link by polling the other DTEs for
input and addressing output to the other DTEs. Utilizing frequency
division or statistical MUX, a multipoint line can support multiple
independent point-to-point channels.
Multimode fiber An optical fiber that supports more than one propagating mode of light
propagation.
Multiplexer Aka. or Multiplexor or Mux,. A device using several communications
channels at the same time, transmits and receives messages and
controls communications lines, may be a microprocessor.
Node A network-connected device, such as a server or PC.
Order Wire Voice channel used to communicate between two locations.
Packet A grouping of data, usually consisting of data and an address header
prior to being sent over a network.
Point-of
Presence (POP) The physical access location within a specific location of the long
distance or common carrier.
Polling The method used for terminal to controller communications. The
controller systematically asks for each terminal if it needs to transmit
to the controller.
Protocol A set of rules for data communication. All devices communicating
together must adhere to the same rules.
Router Similar to a bridge but provides more complex and flexible networking
support. It usually also supports WANs.
Single mode fiber An optical fiber that supports only one mode of light propagation
above the cutoff wavelength.
Star Network in which all terminals are connected through a single point or
node, such as a star coupler.
Synchronous
Transmission Having a constant time interval between successive bits of data or
information.
Time Division
Multiplexing A type of multiplexer that allocates a defined amount of backbone
bandwidth for each connected device.
Time Slot Unit of backbone bandwidth allocated for each port.