2-1
2. OPERATIONAL OVERVIEW
2.1 Communication Unit
The communication unit is the heart of the FELCOM system, transmitting and receiv-
ing messages via the Inmarsat system.
2.1.1 How to turn the power on and off
Press the POWER switch to power the communication unit and antenna unit on or off.
2.1.2 Diagnostics
When the communication unit is turned on it automatically conducts a series of diag-
nostic tests to check itself for proper operation. The test takes about 30 seconds and
the LEDs flash one by one, in the order of left to right. For further details, see Chapter
8.
2.2 Terminal Unit (PC) Operation
All operations are carried out from the terminal unit (local supply), through an easy-to-
follow menu system. In this manual the PC is referred to as “Terminal Unit.” Note that
it is necessary to supply a printer.
PC requirements
• Operating system: Windows XP
®
, Windows Vista
®
, Windows 7
®
• RAM: At least 512 MB (at least 1GB is recommended)
• Hard disk: At least 1 GB free space
• CPU: 1 GHz processor or faster
• CD-ROM drive
POWER
Switch
Status LEDs
POWER: Lights (in green) when power is on.
LOGIN: Lights (in green) when logged in;
flashes (in green) in other instances.
TX: Lights (in green) when transmitting.
ERROR: Flashes (in red) for equipment error.
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