Symbol MC909X User Manual page 226

Glossary - 6 MC909X User Guide
FTP. See File Transfer Protocol.
G
GPS. (Global Positioning System) A "constellation" of 24 satellites that orbit the Earth at a height of 10,900
miles, making it possible for people using ground receivers to determine their geographic location within 10
to 100 meters. The satellites use simple mathematical calculations to broadcast information that is
translated as longitude, latitude and altitude by Earth-based receivers.
GPRS. (General Packet Radio Service) A technology that runs at speeds up to 115Kbit/sec., compared with the
9.6Kbit/sec. of older GSM systems. It enables high-speed wireless Internet and other communications such
as e-mail, games and applications. It supports a wide range of bandwidths and is an efficient use of limited
bandwidth. It's particularly suited for sending and receiving small amounts of data, such as e-mail and Web
browsing, as well as large volumes of data.
GSM. (Global System for Mobile Communications) A digital cellular system based on TDMA narrowband
technology, which gives users access to time slots on the same frequency bands. It allows up to eight
simultaneous communications on the same frequency.
H
Hard Reset. See Cold Boot.
Hz. Hertz; A unit of frequency equal to one cycle per second.
Host Computer. A computer that serves other terminals in a network, providing such services as computation,
database access, supervisory programs and network control.
I
IDE. Intelligent drive electronics. Refers to the solid-state hard drive type.
IEC. International Electrotechnical Commission. This international agency regulates laser safety by specifying
various laser operation classes based on power output during operation.
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.
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