Glossary - 4
ET1 Enterprise Tablet Integrator Guide
IEC (825) Class 1.
This is the lowest power IEC laser classification. Conformity is ensured through a software restriction
of 120 seconds of laser operation within any 1000 second window and an automatic laser shutdown if the scanner's
oscillating mirror fails.
IEEE Address.
See
MAC Address
.
Input/Output Ports.
I/O ports are primarily dedicated to passing information into or out of the terminal’s memory. ET1
mobile computers include USB ports.
Interleaved 2 of 5.
A binary bar code symbology representing character pairs in groups of five bars and five
interleaved spaces. Interleaving provides for greater information density. The location of wide elements
(bar/spaces) within each group determines which characters are encoded. This continuous code type uses no
intercharacter spaces. Only numeric (0 to 9) and START / STOP characters may be encoded.
Internet Protocol Address.
See
IP
.
I/O Ports.
The connection between two devices, defined by common physical characteristics, signal characteristics, and
signal meanings. Types of interfaces include RS-232 and USB.
IP.
Internet Protocol. The IP part of the TCP/IP communications protocol. IP implements the network layer (layer 3) of
the protocol, which contains a network address and is used to route a message to a different network or subnetwork.
IP accepts “packets” from the layer 4 transport protocol (TCP or UDP), adds its own header to it and delivers a
“datagram” to the layer 2 data link protocol. It may also break the packet into fragments to support the maximum
transmission unit (MTU) of the network.
IP Address.
(Internet Protocol address) The address of a computer attached to an IP network. Every client and server
station must have a unique IP address. A 32-bit address used by a computer on a IP network. Client workstations
have either a permanent address or one that is dynamically assigned to them each session. IP addresses are written
as four sets of numbers separated by periods; for example, 204.171.64.2.
IPX/SPX.
Internet Package Exchange/Sequential Packet Exchange. A communications protocol for Novell. IPX is
Novell’s Layer 3 protocol, similar to XNS and IP, and used in NetWare networks. SPX is Novell's version of the Xerox
SPP protocol.
ISM.
Industry Scientific and Medical
K
Key.
A key is the specific code used by the algorithm to encrypt or decrypt the data. Also see,
Encryption
and
Decrypting
.
L
LASER.
Light Amplification by Stimulated Emission of Radiation.The laser is an intense light source. Light from a laser
is all the same frequency, unlike the output of an incandescent bulb. Laser light is typically coherent and has a high
energy density.
laser scanner.
A type of bar code reader that uses a beam of laser light.
LCD.
See
Liquid Crystal Display
.
Summary of Contents for ET1
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