Appendix 1 Glossary - Furuno Inmarsat FleetBroadband FELCOM251 Installation Manual

APPENDIX 1 GLOSSARY

A
ATC Auxiliary Terrestrial Component. Hybrid satellite terrestrial systems that use ter-
restrial repeaters to combine the wide area coverage capabilities of geostationary
or low earth orbit satellites with urban coverage and in building penetration pro-
vided from terrestrial networks.
AWG American Wire Gauge. A means of specifying wire diameters.
B
BGAN Broadband Global Area Network. A mobile satellite service that offers high-speed
data up to 492 kbps and voice telephony. BGAN enables users to access e-mail,
corporate networks and the Internet, transfer files and make telephone calls.
C
CM Continuous Monitoring
E
EIRP Effective Isotropically-Radiated Power. The amount of power that would have to
be emitted by an isotropic antenna (that evenly distributes power in all directions)
to produce the peak power density observed in the direction of maximum antenna
gain.
ESD ElectroStatic Discharge
G
GPS Global Positioning System. A system of satellites, computers, and receivers that
is able to determine the latitude and longitude of a receiver on Earth by calculating
the time difference for signals from different satellites to reach the receiver.
H
HF High Frequency. The frequency band between 3 and 30 MHz. Used for medium
and long range terrestrial radio communication.
I
I/O Input/Output
IP Ingress Protection. An international standard which identifies the level of protec-
tion equipment has in order to prevent foreign object intrusion. This standard cov-
ers both fluid and air-borne particles. The "x" in an IP rating indicates that
equipment does not have protection for the abbreviated item; for example, "IPx4"
indicates that equipment has no water-proofing.
ISDN Integrated Services Digital Network. A circuit-switched telephone network sys-
tem, designed to allow digital transmission of voice and data over ordinary tele-
phone copper wires, resulting in higher quality and speed than are available with
analog.
K
kbps kilobits per second
L
LAN Local Area Network
AP-1