TT-98-129218-A
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Glossary
Glossary
A
AWG
American Wire Gauge. A means of specifying wire diameters.
C
CD
Compact Disc
CM
Continuous Monitoring
D
DTMF
Dual Tone Multi Frequency. The keypad signaling technology that generates two distinct
tones when each key is pressed. This system allows navigation of voice menus and other
advanced calling services. All wireless phones use DTMF dialing.
E
ESD
ElectroStatic Discharge
G
GPIO
General Purpose Input/Output
H
HF
High Frequency. The frequency band between 3 and 30 MHz. Used for medium and long
range terrestrial radio communication.
I
I/O
Input/Output
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.
