APPENDIX 2 LIST OF TERMS AND ABBREVIATIONS
AP-6
IMEI International Mobile Equipment Identifier. A 15-digit number which indicates the
model number, manufacturer, producer, and serial number of cell phones and
data cards.
IMSI International Mobile Subscriber Identity. Specific number assigned to individual
SIM cards. Enables telephone communication.
I/O Input/Output
IP International Protection Rating, sometimes also interpreted as Ingress Protection
Rating, consists of the letters IP followed by two digits and an optional letter. It
classifies the degrees of protection provided against the intrusion of solid objects
(including body parts like hands and fingers), dust, accidental contact, and water
in electrical enclosures.
Internet Protocol. Rules that determine the format of data sent over the Internet or
other network.
IP filter Software that can be configured to easily deny or allow access to a specific port
or address.
IPSec Internet Protocol Security. A protocol suite for securing Internet Protocol (IP) com-
munications by authenticating and encrypting each IP packet of a data stream.
ISDN Integrated Service Digital Network. A digital communications network that handles
data integration for phones and faxes.
kbps kilobits per second
LAN Local Area Network. Cable, Fibre-optic, etc. network that allows computers in the
same geographical area to connect to each other and to other devices such as
printers, servers, etc.
LaunchPad BGAN application software to control devices in the system. CD-ROM supplied by
Inmarsat.
LED Light Emitting Diode
MAC address Media Access Control address. Unique number that identifies each computer on
the network. Consists of 6 by 16 decimals.
MB Mega Bytes
Metric The criteria used by the router to select the optimal route.
Microsoft DS Microsoft Directory Services
MS-ISDN Mobile Subscriber ISDN Number.
MV Multi Voice
NAPT Network Address Port Translation. NAPT is a technique in which port numbers
and private Internet Protocol (IP) addresses are mapped from multiple internal
hosts to one public IP address.
NAT Network Address Translation. An Internet standard that enables a local-area net-
work to use one set of IP addresses for internal traffic and a second set of address-
es for external traffic. A NAT module makes all necessary address translations.
NBT NetBIOS over TCP/IP. A networking protocol that allows legacy computer applica-
tions relying on the NetBIOS API to be used on modern TCP/IP networks.
PBX Private Branch eXchange. A telephone exchange that serves a particular busi-
ness or office, as opposed to one that a common carrier or telephone company
operates for many businesses or for the general public.
PC Personal Computer
PIN Personal Identification Number. The SIM card identification number.
ping Confirms if computers and networks are connected.
PPPoE Point-to-Point protocol over Ethernet. A protocol for using the PPP function via
Ethernet.
Proxy server A server that acts as a go-between for requests from clients seeking resources
from other servers.
Term Meaning
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