Specifications

Chapter5‐Troubleshooting
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22
Multi‐TechSystems,Inc.MT9234ZBA‐USBUserGuide(S000473A)
Chapter 5 – Troubleshooting
Yourmodemwasthoroughlytestedatthefa ctorybeforeitwasshipped.Ifyouareunabletomakeasuccessful
connection,orifyouexperiencedatalossorgarbledcharactersduringyourconnection,itispossible thatthe
modemisdefective.However,itismorelikelythatthesource ofyourproblemlieselsew
here.Thefollowing
symptomsaretypicalofproblemsyoumightencounter:
● NoneoftheLEDslightwhenthemodemison.
● Themodemdoesnotrespondtocommands.
● Themodemdialsbutisunabletomakeaconnection.
● Themodemdisconnects whileonline.
● Themodemcannotconnectwhenanswering.
● Dataisbeinglost.
● Therearegarbagecharactersonthemonitor.
● Themodemdoesn’tworkwithCallerID.
● Faxanddatasoftwarecan’trunatthesametime.
NoneoftheIndicatorsLight
Whenyoupluginthemodem,theoperatingsystemdetectsandconfiguresthemodem,andtheTRLEDshould
comeon.
IftheTRLEDdoesnotcomeon,checktoseethatthedriverfromtheproductCDhasbeeninstalled,referto
Chapter2oninstallingthemodemdriver.
TheModemDoesNotRespondtoCommands
● Makesureyouareissuingthemodemcommandsfromdata communicationsoftware,eithermanuallyin
terminalmodeorautomaticallybyconfiguringthesoftware.(Youcannotsendcommandstothemodem
fromtheDOSprompt.)
● Makesureyouareinterminalmodeinyourdatacommunicationprogram,thentypeATandpressENTER.
IfyougetanOKresponsefromyourmodem,yourconnectionsaregoodandtheproblemlikelyisinthe
connectionsetupinyourcommunicationsoftware.
● TryresettingyourmodembyunpluggingtheUSBcablefromthemodem,andthenpluggingitbackin.
● Tryrebootingthecomputer.
● Themodemmighthaveaproblembeyondthescopeofthisuserguide.IfyouhaveanotherMulti‐Tech
modem,tryswappingmodems.Iftheproblemgoesaway,thefirstmodemispossiblydefective.
TheModemCannotConnectWhenAnswering
● Autoanswermightbedisabled.Turnonautoanswerinyourdatacommunicationsprogramorsendthe
commandATS0=1(ATS0=2ifyouhaveCallerIDservice)tomakesureyourmodeminterminalmode.
TheModemDoesn’tWorkwithCallerID
● CallerIDinformationistransmittedbetweenthefirstandsecondrings,soifautoansweristurnedoff
(S0=0)orifthemodemissettoanswerafteronlyonering(S0=1),themodemwillnot receiveCallerID
information.Checkyourinitializationstring,andifnecessarychangeittosetth
emodemtoanswerafter
thesecondring(S0=2).
● MakesurethatyouhaveCallerIDservicefromyourtelephonecompany.
FaxandDataSoftwareCan’tRunattheSameTime
● Communicationsdevicescanbeaccessedbyonlyoneapplicationatatime.InWindows2003andhigher,
youcanhavedataandfaxcommunicationapplicationsopenatthesametime,buttheycannotuse the
samemodematthesametime.