NetComm IG6000 Network Router User Manual


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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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