Specifications


MT9234ZBA‐USBUserGuide 20
Chapter 4 – Remotely Configuring the
Modem
Thischapterdescribeshowtouse ane tworkmanagementtooltoconfiguremodemsanywhereinyournetwork
fromonelocation.Withpasswordprotectedremoteconfiguration,youcanissueATcommandstoaremote
MultiModemprodu ctformaintenanceortroubleshootingasifyouwereonsite.Thischapteralsodescribeshow
to
changedefaultpasswordsandcharacterstoenhancethesecurityoftheproduct.
RemotelyConfiguringtheModem
ThefollowingstepsarevalidforconnectionsestablishedbythelocalortheremoteMulti‐Techmodem.
1. EstablishadataconnectionwitharemoteMultiModemproduct.
2. SendthreeremoteconfigurationescapecharactersfollowedbyATandthesetuppassword,andpressENTER.Example:
%%%ATMTSMODEM.Youhavefourtriestoenterthecorrectpasswordbeforebeingdisconnected.Ifthepasswordis
correct,theremotemodemrespondswithOK.
3. YoucannowsendATcommandstoconfiguretheremotemodem.
4. Afterconfiguringtheremotemodem,savethenewconfigurationbytypingAT&W0,andpressingEnter.
5. TypeATOandpressEntertoexitremoteconfiguration.Youcanthenbreaktheconnectioninthenormalway.
CAUTION:Ifyouhang‐upordisconnectwhile inremoteconfigurationmode,theremotemodemmaylockup.
ChangingDefaultPasswordsandEscapeCharacter
Multi‐Techmodemsareshippedwithadefaultsetuppassword(MTSMODEM).Anyonewhohasanowner’s
manualknowsthedefaultsetuppassword.Assuch,forsecurityreasons,changethepasswordandtheremote
configurationescapecharacter.
ChangingtheSetupPassword
1. OpenadatacommunicationsprogramsuchasPhoneToolsorHyperTerminal.
2. Tochangethepassword,typeAT#S=xxxxxxxx,wherexxxxxxxxstandsforthepassword,andpressENTER.Thepassword
canincludeanykeyboardcharacter,andmustbeonetoeightcharacterslong.ThemodemrespondswithOK.
3. Thenewpasswordissavedautomatically.YoucannoweitherentermoreATcommandsorexitthedata
communicationsprogram.Thenexttimeyouremotelyconfigurethemodemyoumustusethenewsetuppassword.
Note:Youcanonlychangethesetuppasswordlocally;youcannotchangeitremotely.Also,passwords
arecasesensitive.The
nexttimeyouenterthepassword,itmustbeinthesamecaseasyousetitup.
ChangingtheRemoteEscapeCharacter
Toincreasesecurity,youcanchangearemotemodem’sremoteconfigurationescapecharacter.Theremote
configurationescapecharacterisstoredinregisterS9. Thefactorydefaultis37,whichistheASCIIcodefo rthe
percentcharacter(%).ForASCIIcodecharacters,refertoAppendixE.SettingS9to0
(zero)disablesremote
configurationentirely—butifyoudothisremotely,youwon’tbeabletochangeitbackremotely.
1. Establisharemoteconfigurationlinkwiththeremotemodemasdescribedin“BasicProcedure.”
2. TypeATS9=n,wherenistheASCIIcodeforthenewremoteconfigurationescapecharacter,thenpressEnter.
3. SavethenewvaluebytypingAT&WandpressingEnter.
4. TypeATO<CR>toexitremoteconfiguration.