Sierra Wireless AirLink MP895, Руководство пользователя

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Rev 1.0 Apr.10 39
5 5: MP Modem Operation
• Status indicators
• AceView software
Operating the MP modem requires some knowledge of both the MP
modem hardware and the AceView software. This chapter describes
the basics of each.
Turning the MP modem on and off
If the MP modem is installed in a vehicle, the way in which the MP
modem is wired determines how it is powered on and off. In most
cases the power supply for the MP modem is the vehicle's electrical
system and the MP modem is powered on and off in one of these
ways:
• Engine on. The MP modem is powered only when the ignition is
on. (The MP modem is only on when the engine is on.)
—or—
• Accessory on. The MP modem is powered when the ignition is
switched to "Accessories". (This allows the MP modem to be
powered when the engine is off.)
—or—
• Separately switched. The MP modem is connected to a
separate on/off switch so that it can be turned on and off
independently of the engine and vehicle accessories.
Rather than cutting power to the MP modem, the ignition key or
power switch allows the MP modem to perform a controlled shutdown
sequence that avoids data loss. (You can also set the MP modem to
wait up to 240 minutes after the power switch has been turned off
before it shuts down.)