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IndustrialModemUserGuide

YML3913A 12

WhentheterminalassertstheDTRsignal(DTRmakesanOFFONtransition),yourmodemwilldialstoredphone

numberzero.Thephonenumbermaycontaindialmodifiers.

Toreturntoasynchronousmode:

· Type:AT&M0<E>

Yourmodemwillremaininasynchronousmode.

LeasedLineOperation

Aleasedline,orprivateline,isatelephonelinethatpermanentlyconnectstwoormorelocations.Theleasedline

doesnothaveanyswitchingequipmentassociatedwithit.

Leasedlineoperationwiththemodemisselectedwiththe&Lcommand.

Ifyouselectleasedlineoperationwiththe&L1command,youmustissuetheATAcommandtoansweracall,and

theATDcommandtoinitiate acall.

Ifyouuse&L2or&L3toselectAutoleasedlineoperation,youdonotneedtoissuetheATAorATDcommands;

&L2selectsOriginatemodeautomaticallyand&L3selectsAnswermodeautomatically.Todialoranswer,raise

DTR;tohangupandreturntolocalcommandstate,lowerDTR.

+ Youwillrequireaspecialphonecable(availablefromyourdealer)toconnectyourmodemtoaleased

linesocket.Thephonecablesuppliedwithyourmodemissuitableforusewithnormal,dialup,voice(PSTN)

lines.

Beforecommencingleasedlinecommunications,itisrecommendedthatanonautorangingBsettingbespecified.

+ Iferrorcorrectionisrequired,selectaReliablemode,notanAutoReliablemode.(Seethe \Ncommand.)

Autorangingandfallbackaredisabledinleasedlinemode.Yourmodemwillonlyattempttoconnectusingthe

communicationsstandardspecifiedbytheBcommandandtheterminalspeed.

Onceaconnectionhasbeenestablished,ifyourmodemdetectsalossofcarrieritwillcontinuouslyattempttore

establishtheconnection.

IfthemodemisinautoleasedlineoperationandthisconfigurationhasbenstoredinmemoryusingtheAT&W

command,atimeoutperiodof10secondsisavailableafterpoweruptodisabletheleasedlinemodeviatheAT&O

command.Alternatively,thiscommandcanbesentwithDTRlow.

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Netcomm IG6000 Manual do Utilizador Página 12