User manual
Glossary
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IMSO International Maritime Satellite Organisation. An intergovernmental body established to
ensure that Inmarsat continues to meet its public service obligations, including
obligations relating to the GMDSS.
IP Ingress Protection. An international classification system for the sealing effectiveness of
enclosures of electrical equipment against the intrusion into the equipment of foreign
bodies (i.e. tools, dust, fingers) and moisture. This classification system uses the letters "IP"
IP Internet Protocol. The method or protocol by which data is sent from one computer to
another on the Internet.
ISDN Integrated Services Digital Network. A circuit-switched telephone network system,
designed to allow digital transmission of voice and data over ordinary telephone copper
wires, resulting in higher quality and speed than are available with analog.
L
LAN Local Area Network. A computer network covering a small physical area, like a home,
office, school or airport. The defining characteristics of LANs, in contrast to wide-area
networks (WANs), include their usually higher data-transfer rates, smaller geographic area,
and lack of a need for leased telecommunication lines.
N
NAT Network Address Translation. An Internet standard that enables a local-area network to
use one set of IP addresses for internal traffic and a second set of addresses for external
traffic. A NAT module makes all necessary address translations.
P
PBX Private Branch Exchange, telephone exchange that serves a particular business or office.
PIN Personal Identification Number. A code number used to provide access to a system that
has restricted access.
PoE Power over Ethernet. A standard for combining power supply with transmission of data
over the Ethernet. The source unit "injects" power into the Ethernet cable and the power
is "picked up" at the connected device.
PPPoE Point-to-Point Protocol over Ethernet. A network protocol for encapsulating Point-to-
Point Protocol (PPP) frames inside Ethernet frames. By using PPPoE, users can virtually
"dial" from one machine to another over an Ethernet network, establish a point to point
connection between them and then securely transport data packets over the connection.