Sierra Wireless MP 880W Podręcznik Użytkownika Pobierz pdf (Strona 43)

Rev 1.5 Jul.08 43

4: MP Modem Operation

• Status indicators

• 3G Watcher software

• Establishing

connections

OperatingtheMPmodemrequiressomeknowledgeofboth

theMPmodemhardwareandthe3GWatcher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

vehicleʹs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ʺAccessoriesʺ.(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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