Multitech MTCMR-G2-GP Especificaciones descargar pdf (Pagina 34)

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Multi‐TechSystems,Inc.MultiModemiCellUserGuide 34

Chapter 3 – Using Your Wireless Modem

PhoneNumbersfortheWirelessModem

● Everywirelessmodemhasauniquephonenumber.

● Yourwirelessserviceprovidermaygiveyouthephonenumber.ThenumbermaybeontheSIMcard.Wireless

providerimplementationsmayvary.

ExamplesofUsefulATCommands

HyperTerminal

Toverifysignalstrengthandroamingstatus,useaterminalapplicationsuchasHyperTerminal.Toopenthisprogramin

WindowsVistaorXP,gotoStart>AllPrograms>Accessories>Communications>HyperTerminal.OtherWindows

operatingsystemshavesimilarpathstoHyperTerminal.IfyoucannotfindHyperTerminal,useyoursys

tem’sonlineHelpfile.

ATCommands

YoucanuseATcommandstooperate,configure,andqueryyourmodem.ATcommandsfortheMultiModemiCellsare

publishedinseparateReferenceGuides.YoucanfindtheseguidesontheMulti‐Techwebsite.

Thefollowingtwocommandsletyouquerysignalstrengthandroamingstatus.

VerifyingSignalStrength

1. UsingHyperTerminal,typeAT+CSQ

2. Themodemrespondswiththereceivedsignalstrength(rssi).

3. Themodemrespondswiththereceivedsignalstrength(rssi)andthechannelbiterrorrate(ber).

RSSIrangesfrom0to31.

SignalStrengthVerification– RSSI

AT+CSQxxValues SignalStrength LEDBars

0‐10 WeakorInsufficient 1BarLEDislit

11‐20 Average 1Barand2BarLEDsarelit

21

–

31 Exceptional 1Bar,2Bar,3BarLEDsarelit

99 Nosignal Nolight

BERrangesfrom0to7(Sevenisthehighesterrorrate).

CheckingNetworkRegis

trationandRoamingStatus

ToverifythattheMultiModemisregisteredonthewirelessnetwork:

1. OpenHyperTerminal,andtypeAT+CREG?formostmodels.

ThemodemrespondstoAT+CREG?inoneofthefollowingways:

NetworkRegistrationVerification

Value NetworkRegistrationStatus

0,0 Themodemisnotregisteredonanynetwork

0,1 Themodemisregisteredonthehomenetwork

0,5 Themodemisregisteredonanetworkanditisroaming

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Multitech MTCMR-G2-GP Especificaciones Pagina 34