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Glossary of Technical Terms

BGAN
Broadband Global Area Network is a future Inmarsat network comprising satellites and land earth stations; permits data speeds up to 432 kbps.
GAN
Global Area Network, a global Inmarsat network consisting of satellites and land earth stations; permits data speeds up to 64 kbps.
GMDSS
Global Maritime Distress and Safety System, a global communication system enabling vessels in distress to transmit distress signals to nearby coast stations and vessels.
Inmarsat
International Maritime Satellite Organisation. Inmarsat operates a satellite network for global trans-mission of all types of global cellular services, including maritime, aeronautical and land-based services.
Inmarsat-C
A data-based Inmarsat service mainly used for messaging, positioning and GMDSS.
Inmarsat mini-M
and Aero-M
Inmarsat service that provides mobile communication, including voice, fax and data communication; is used in all market segments.
Inmarsat Aero-I
Inmarsat’s latest aeronautical communication service is perfect for short and intermediate range planes. Thrane & Thrane’s Aero-I products comprise a terminal supporting safety, operational, cockpit and passenger voice and data applications.
Land earth stations
Also named LES, fixed terrestrial stations transmitting and receiving signals to and from satellites via land-based networks.
LES
Land Earth Station.
M4
Another term for GAN. Thrane & Thrane’s M4 terminal is a mobile voice and data terminal for Inmarsat’s GAN service.
MPDS
Mobile Packet Data Service is a packet data service from Inmarsat permitting the user to stay online even if data is not transmitted. The fee charged is based on kilo bits transmitted.
Packet data
A method for the transmission of information by which the information is transmitted as packets each containing a certain amount of the information to be transmitted and the address of the receiver.
RAN
Radio Access Network is a network station in the BGAN system.
RF ASIC
Radio Frequency Application Specific Integrated Circuits. A chip designed for special applications; makes it possible to develop and produce smaller and cheaper terminals.
SBS
Satellite Base Station, a network station in MPDS.
UMTS
Universal Mobile Telecommunications System, a future mobile communications system.



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