Multitech MT9234ZBA-USB Modem User Manual

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 Chapter5–Troubleshooting

Multi‐TechSystems,Inc.MT9234ZBA‐USBUserGuide 29

● Nomodemattheotherend

● Afaultymodem,computer,orsoftwareattheotherend

● Incompatibilitybetweenmodems

Youcannarrowthelistofpossibilitiesbyusingextendedresultcodes.Extendedresultcodesareenabledby

default.Iftheyhavebeendisabled, enterATV1X4andpressENTERwhileinterminalmode,orincludeV1X4inthe

modem’sinitializationstring.Whenyoudialagain,themodemreportsthecall’sprogress.

● IfthemodemreportsNODIALTONE,checkthatthemodem’stelephonelinecableisconnectedtoboththe

modem’sLINEjack(notthePHONEjack)andthetelephonewalljack.Ifthecablelookssecure,tryreplacingit.

Ifthatdoesn’twork,theproblemmightbeinyourbuilding’stelephoneinstallation.Totestthebuilding

installation,plu

gatelephoneintoyourmodem’stelephonewalljackandlistenforadialtone.Ifyouheara

dialtone,yourmodemmightbeinstalledbehindacompanyphonesystem(PBX)withaninternaldialtone

thatsoundsdifferentfromthenormaldialtone.Inth

atcase,themodemmightnotrecognizethedialtone

andmighttreatitasanerror.CheckyourPBXmanualtoseeifyoucanchangetheinternaldialtone;ifyou

can’t,changeyourmodem’sinitializationstringtoreplaceX4withX3,whichcausesthemodemtoignoredial

tones(note,however,tha

tX3isnotallowedinsomecountries,suchasFranceandSpain).

● IfthemodemreportsBUSY,theothernumbermightbebusy.Tryagainlater,oritmightindicatethatyou

failedtoadda9prefixtothephonenumberifyoumustdial9foranoutsideline.

● Ifyoumustdial9togetanoutsideline,theeasiestwaytodialitautomaticallyistoincludeitinthemodem’s

dialprefix,forexample,ATDT9,.Notethecomma,whichinsertsapausebeforethenumberisdialed.By

inserting9,intothedialprefix,youdonothavetoin

cludeitineachdirectoryentry.

● TochangethedialprefixinWindows98HyperTerminal,selectCallfromtheCallmenu,clickDialing

Properties,andtype9inthelocalandlongdistanceboxesinHowIdialfromthislocation.

● IfthemodemreportsNOANSWER,theothersystemhasfailedtogooff‐hook,oryoumighthavedialeda

wrongnumber.Checkthenumber.

● IfthemodemreportsNOCARRIER,thephonewasansweredattheotherend,butnoconnectionwasmade.

Youmighthavedialedawrongnumber,andapersonansweredins teadofacomputer,oryoumighthave

dialedthecorrectnumber,buttheothercomputerorsoftwarewasturnedofforfaulty.Checkthenu

mber

andtryagain,ortrycallinganothersystemtomakesureyourmode misworking. Also,trycallingthenumber

onyourtelephone.Ifyouhearharshsounds,thenanothermodemisansweringthecall,andthemodems

mightbehavingproblemsnegotiatingbecauseofmodemi

ncompatibilitiesorlinenoise.Tryconnectingata

lowerspeed.

ModemDisconnectsWhileOnline

● IfyouhaveCallWaitingonthesamephonelineasyourmodem,itcaninterruptyourconnectionwhen

someonetriestocallyou.IfyouhaveCallWaiting,disableitbeforeeachcall.Inmosttelephoneareasin

NorthAmerica,youcandisableCallWaitingbyprecedingthetelephonenumberwith*70(checkwithyo

ur

localtelephonecompany).

● YoucanautomaticallydisableCallWaitingbyincludingthedisablingcodeinthemodem’sdialprefix(e.g.,

ATDT*70,—notethecomma,whichinsertsapausebeforethenumberisdialed).Tochangethedialprefixin

Windows98HyperTerminal,selectCallfromtheCallmenu,clickDialingProperties,checkThislocationhas

CallWa

iting,andselectthecorrectcodeforyourphoneservice.

● Ifyouhaveextensionphonesonthesamelineasyourmodem,youorsomeoneelsecaninterruptthe

connectionbypickingupanotherphone.Ifthisisafrequentproblem,disconnectthee xtension phones 

beforeusingthemodem,orinstallanotherphonelineespeciallyforthemodem.

● Checkforlooseconnectionsbetweenthemodemandthecomputerandthetelephonejack.

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Multitech MT9234ZBA-USB Modem User Manual