Appendix G List Of Terms - Nera Saturn BM Marine Operator's Manual

Appendix G
Appendix G – List of Terms
AOR-E Atlantic Ocean Region East.
AOR-W Atlantic Ocean Region West.
AZIMUTH horizontal direction angle between north and, e.g. the
direction to the satellite.
ASCII American Standard Code for Information Interchange, a stand-
ard character encoding scheme widely used in computers and com-
munications. Defined as a 7-bit code character presentation (same as
IA5 by CCITT). An industry version of 8-bit extended ASCII is often
used.
BER Bit Error Rate
BPSK Binary Phase Shift Keying
Bulletin Board system status information for MES.
C Band band of radio frequencies from about 4.0 GHz to 6.0 GHz,
used by the Inmarsat-B links between fixed NCS/LES and the satel-
lite.
CCITT The International Telephone and Telegraph Consultative
Committee, the organisation within the ITU that sets the standards for
terrestrial networks.
Centronics industry standard parallel I/O interface.
Codec speech encoder/decoder
Commissioning process following initial MES registration with Inmar-
sat that includes test of MES and certifies it for operation.
Deg degrees
DI/DID Destination Identification Digits, number actually used by the
system to route incoming calls to the individual Saturn B end termi-
nals.
DNIC Data Network Identification Code.
Downlink radio link from the satellite down to stations on Earth.
DTMF Dual-Tone Multifrequency Dialing, pulsing in which each digit
is represented by a specific pair of audio frequencies (one tone below
1000 Hz and another above 1200 Hz).
Elevation vertical angle to the satellite, e.g. the height of the satellite
above the horizon.
End terminal physical device connected to one of the MES connec-
tors, e.g. telephone or telefax.
FleetNET™ an EGC service for commercial messages to individual
users or groups of users.
Saturn Bm – Chapter 6. Appendices G-1