AP-4
APPENDIX 2 LIST OF TERMS AND
ABBREVIATIONS
Term Meaning
AMBE Advanced Multi-Band Excitation. A proprietary speech coding standard developed
by Digital Voice Systems Inc.
ADE Above Deck Equipment. In this instance the antenna unit.
Air Interface Wireless interface.
APN Access Point Name. Destination name for packet communication.
ASK Amplitude Shift Keying. The amplitude of an analog carrier signal varies in accor-
dance with the bit stream (modulating signal), keeping frequency and phase con-
stant.
ATB Antenna Tracking Block. Mechanism inside the antenna unit which tracks the sat-
ellite.
BGAN Broadband Global Area Network. A global satellite network with telephony, FAX
and data transfer capability using portable terminals. The service is available with
high-speed broadband data communication.
BOOTP Bootstrap Protocol. A protocol where, on a TCP/IP network, a client machine au-
tomatically reads information from the server on startup.
CS Circuit Switching. When calling with an analog or ISDN telephone, confirms that
connection is made.
CSV Comma Separated Value. Method of digital storage of data structured in a table of
lists form, where each associated item (member) in a group in association with
others is also separated by the commas of its set.
DHCP Dynamic Host Configuration Protocol. A network application protocol used by de-
vices (DHCP clients) to obtain configuration information for operation in an Inter-
net Protocol network.
DHCP Lease Length of time a DHCP client is allocated to maintain an IP connection to DHCP
Server. Usually set by Administrator.
DMZ DeMilitarized Zone. A physical or logical subnetwork that contains an organiza-
tion's external services from a larger, untrusted network, usually the Internet.
DNS Domain Name Service. The mechanism by which an IP address is assigned a
name by the host.
DSP Digital Signal Processor. A specialized microprocessor designed specifically for
digital signal processing, generally in real-time computing.
FPGA Field Programmable Gate Array. A semiconductor device that can be configured
by the customer or designer after manufacturing
FTP File Transfer Protocol. Protocol used to send files on a TCP/IP network, internet,
or intranet.
Gateway Equipment or software used to relay network connections. The “doorway” of the
network.
HPA High Powered Amplifier.
ICCID Integrated Circuit Card ID. The unique serial number, international number of the
mobile user (IMSI), security authentication and ciphering information, temporary
information related to the local network, a list of the services the user has access
to and two passwords (PIN for usual use and PUK for unlocking).
ICMP Internet Control Message Protocol. Protocol used to send error and warning mes-
sages. Allows networks and connected computers to mutually exchange status in-
formation.
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