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Command Description
ATM1
Speakerisonduringcallestablishmentbut goesoffwhencarrier isdetected
(default).
ATM2 Speakerisalwayson.
ATM3 Speakerifoffduringdialingandwhenreceivingcarrier butonduringanswering.
ATQ0 EnablesresultcodestotheDTE(default).
ATQ1 DisablesresultcodestotheDTE.
ATSr EstablishesS-register“r” asthedefaultregister.
ATSr=n SetsS-register“r” tothevalue“n.”
ATSr? Reportsthevalueof S-register “r.”
ATV0 Enablesshort-form resultcodes.
ATV1 Enableslong-formresultcodes.
ATW0
Uponconnection,themodemreportsonlytheDTEspeed(for example,
CONNECT 9600). Subsequentresponsesaredisabled(default).
ATW1
Uponconnection,themodemreportsthemodulationtype,linespeed, theerror
correctionprotocolandthe DTEspeed.Subsequentresponsesaredisabled.
ATW2
Uponconnection,themodemreportsDCEspeed(for example,CONNECT
2400).Subsequentresponsesaredisabled.
ATX0
Ignoresdialandbusytone.SendsCONNECT messagewhenaconnectionis
establishedbyblinddialing.
ATX1
Disablesmonitoringofbusytones.SendsonlyOK,CONNECT,RING,NO
CARRIERandERROR messages.Ifbusytonedetectionisenforcedandbusy
toneisdetected,NOCARRIERwillbereportedinsteadof BUSY.Ifdialtone
detectionisenforcedor selectedanddialtoneisnotdetected,NOCARRIERwill
bereportedinsteadofNODIALTONE.
ATX2
Disablesmonitoringofbusytones.SendsonlyOK,CONNECT,RING,NO
CARRIER,ERROR,NODIALTONEandCONNECT XXXX.Ifbusytone
detectionisenforcedandbusytoneisdetected,NOCARRIER,willbereported
insteadofBUSY.Ifdialtonedetectionisenforcedor selectedanddialtoneisnot
detected,NOCARRIERwillbereportedinsteadofNODIALTONE.
ATX3
Enablesmonitoringofbusytones.SendsonlyOK,CONNECT,RING,NO
CARRIER,ERROR,NODIALTONEandCONNECT orCARRIER XXXX.Ifdial
tonedetectionisenforcedand dialtoneisnotdetected,NOCARRIERwillbe
reported.
Appendices 82