Intermec Trakker Antares 2420, User Manual

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Glossary
G-11
G
ESD
Electrostatic discharge. Transient, rapid transfer of charge between bodies at different
electrostatic potentials:
•
caused by direct contact.
•
caused by arc-over of near proximity.
•
induced by an electrostatic field.
Ethernet
A type of LAN that allows the transmission of computer data, audio data, and video data
at 10 Mbps across a linear bus topology. Ethernet uses the access method known as
Carrier Sense Multiple Access with Collision Detection (CSMA/CD). See the IEEE
802.3 standard for the specifications.
firmware
Software routines stored in read only memory (ROM). Unlike random access memory
(RAM), ROM stays intact even without electrical power. The TRAKKER Antares 2400
Menu System; applications; TE Configuration Menu (if a TE terminal); and operating
environment, firmware, and drivers are stored in firmware. Contrast with “software.”
fixed length
Characteristic of a bar code symbology in which the number of characters per symbol is
predetermined. Opposite of variable length.
flash memory
A type of nonvolatile memory. Flash memory must be erased in blocks and is commonly
used as a supplement to or replacement for hard disks in portable computers and data
collection devices.
flow control
A method for controlling the flow of data between the terminal and the serial port. It
stops the transmitting device from sending data when the receiving device buffer fills up
and starts it again when the buffer empties. Flow control can be done through software
(XON/XOFF) or hardware (CTS/RTS).
frequency hopping
A spread spectrum technique by which the band is divided into a number of channels and
the transmissions hop from channel to channel in a predetermined sequence.
FTP
File Transfer Protocol. The Internet standard high-level protocol for transferring files
from one device to another over TCP/IP networks. FTP uses TCP to deliver its data.
Contrast with “TFTP.”