Glossary
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LWE LightWeight Ethernet
N
NMEA National Marine Electronics Association (standard). A combined
electrical and data specification for communication between marine
electronic devices such as echo sounder, sonars, anemometer (wind
speed and direction), gyrocompass, autopilot, GPS receivers and many
other types of instruments. It has been defined by, and is controlled
by, the U.S.-based National Marine Electronics Association.
NTP Network Time Protocol
O
OC Open Collector
P
PTT Push-To-Talk
R
RSTP Rapid Spanning Tree Protocol is typically able to respond quickly to
changes in network topology or physical link failure. RSTP provides
significantly faster spanning tree convergence after a topology
change.
Rx Receive
S
STP Shielded Twisted Pair
T
Tx Transmit
U
USB Universal Serial Bus. A specification to establish communication
between devices and a host controller (usually personal computers).
USB is intended to replace many varieties of serial and parallel ports.
USB can connect computer peripherals such as mice, keyboards, digital
cameras, printers, personal media players, flash drives, and external
hard drives.
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