Appendix R Glossary
R-1
Appendix R Glossary
A
ADE ......................................................................................................... Above Deck Equipment
AOR ........................................................................................................... Atlantic Ocean Region
APN ................................................................................................................ Access Point Name
ASCII...........................................................American Standard Code for Information Interchange
*A standard alphanumeric character set based on 7-bit codes.
AZ .................................................................................................................................... Azimuth
B
BDE ......................................................................................................... Below Deck Equipment
Bit .............................................. The basic unit of digital communications; may be either 1 or 0.
BPS (bit per second) ................. A unit of measurement for speed of data transfer or throughput.
BR .................................................................................................................................... BeaRing
Bulletin Board (in a TDM channel)
*A data packet transmitted in each frame of a TDM channel which contains
information about the status of the Inmarsat B/M, mini-M and C network
configurations and the current frame number, used by the MES as a timing
reference.
Byte *One byte comprises eight bits and may represent either one alphanumeric
character or numeric information.
C
CCIR .......................................... Consulting Committee of International Radio communications
CCITT ....................................... Consulting Committee of International Telegraph & Telephone
Character *One element of an alphanumeric character set. One character is
equivalent to one byte or 8 bits.
COMM .................................................................................................................. Communication
CPU .......................................................................................................... Central Processing Unit
Command *The generic name for anything you tell a computer program to do.
CS ........................................................................................................................ Circuit Switched
D
dB ....................................................................................................................................... Decibel
DC ........................................................................................................................... Direct Current
DCN ........................................................................................................................ Disconnection
DEC ...................................................................................................................... Decoder Circuit
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