Sierra Wireless AirLink MP890 Guide de l'utilisateur télécharger pdf (Page 47)

Rev 1.0 Mar.10 39

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.)

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Sierra Wireless AirLink MP890 Guide de l'utilisateur Page 47