Netcomm IG6000 Bedienungsanleitung PDF herunterladen (Seite 11)

IndustrialModemUserGuide

YML3913A 11

Operating Modes

AsynchronousMode

AsynchronousModeisthenormaldefaultmodeofthemodem.Control andmonitoringisperformedbyexecuting

theATcommandsusingaPCfittedwithsuitablecommunicationssoftware.

SynchronousOperation

Yourmodemsupportstwosynchronousmodes.Mode1allowsoperationwithcomputerswhichsupport

asynchronousandsynchronouscommunicationonasingleRS232port.Mode2allowsyourmodemtobe

operatedwithdedicatedsynchronousterminals.

Althoughyourmodemcanonlyoperateoverasingletwowireconnection,itwillstillperformfullduplex

synchronouscommunication.HalfduplexoperationcouldbesimulatedbycontrollingthestateoftheRTSand

CTSsignals.

TerminalSpeeds

Yoursynchronousterminalorhostshouldusetheclocksignalsprovidedbythemodemtosynchronisetransmit

andreceivedata.Theclockspeedwillrepresenttheactualconnectionspeedofthemodem.

+ Whensynchronousmodeisselected,yourmodemcannotoperateinconstantspeedmodeorusetheerror

correctionordatacompressionfacilitiesofthemodem.Onlyvariablespeedmodeisavailable insynchronous

connections(thisreferstothemodem'sterminalspeed).

LineSpeeds

Yourmodemsupportsanumberofsynchronouslinespeeds.

Whenoperatinginsynchronousmode,yourmodemshouldalwaysbeconfiguredwithalocked,nonautoranging

Bsetting(thisreferstomodemlinespeed).

ForV.34,theBsettingonlysetsthemaximumspeed.Themodemwillautomaticallydeterminethehighestusable

speedfortheline.

SynchronousMode1

Synchronousmode1isselectedwiththe&M1command.

· Type:AT&M1<E>

Yourmodemwillentersynchronousmodewheneveritsuccessfullyconnectstoaremotemodem.

Youshouldalso:

· Type:AT&D2<E>

ThisallowshangupviayourcomputerÕsDTRsignal.

Toreturntoasynchronousoperation:

· Type:AT&M0<E>

SynchronousMode2

Synchronousmode2isselectedwiththe&M2command.

· Type:AT&M2<E>

Yourmodemwillentersynchronousmodewheneveritsuccessfullyconnectstoaremotemodem.

Youshould also:

· Type:AT&D2<E>

Thisallowsyoutodialandhangup.

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Netcomm IG6000 Bedienungsanleitung Seite 11