IndustrialModemUserGuide
YML3913A 5
Ifyourmodemeversuffersphysicaldamagethatcausesitsinternalpartsto becomeexposed,itshouldbe
disconnectedfromthephonelineimmediately.Themodemmustthenberepairedbeforereconnectiontothephone
lineispermissible.
Shoulditbenecessarytophysicallymoveyourmodem,disconnectitfromthephonelineorearthingleadbefore
disconnectingthepowerconnection.Whenreconnectingyourmodem,reconnectthepowerorearthingleadbefore
reconnectingittothephoneline.
SomeparametersrequiredforcompliancewithTelecomÕsPTCSpecificationsaredependentontheequipment
connectedtotheRS232port.Theconnectedequipmentshallbesettooperatewithinthefollowinglimitsfor
compliancewithTelecomSpecifications:
1. EquipmentconnectedtotheRS232portshallbecertifiedtomeettherequirementsofReg.18oftheNew
ZealandWiringRegulations1976.
2. Whentheusermanuallyinitiatesacall,viaequipmentconnectedtotheRS232port,theequipmentshall
operatewithinthefollowingrestrictions:
a. Notmorethan5callattemptsshallbemadetothesamenumberwithinaonehourperiod.
b. Thereshallbeatleast60secondsbetweencallattempts.
c. Notmorethanatotalof10callattemptsshallbemadetothesamenumberforanysinglemanualcall
initiation.
d. Automaticcallstodifferentnumbersshallbenotlessthan5secondsapart.
FAILURETOMEETTHEABOVEREQUIREMENTSMAYNEGATETHEUSERRIGHTSUNDERTHE
TELECOMTERMSOFSERVICE.
WhenoperatinginV.22bisorV.22modeoversomeoldertelephoneexchanges,itmaybenecessarytoissuethe
&G2command.
SettingtheS0register(autoanswer)toS0=1ortovaluesgreaterthan5willrenderthisequipmentnoncompliant
withtheTelepermitrequirements.
ThisequipmentdoesnotprovideaguardtonewiththeV.22andV.22bisanswermodes.Insomecircumstances
thiscouldcauseinterferencewiththetelephonenetworksignallingsystems,andcouldresultinlostcalls.Telecom
willnotacceptresponsibilityshouldsuchproblemsoccur.Suchoccurrenceswillberare.
ThepreferredmethodistouseDTMFtones(ATDT...)asthisisfasterthanpulse(decadic)dialling,andis
availableonmostNewZealandtelephoneexchanges.WhereDTMFisnotavailableanddecadicmustbeused,
yourcommunicationssoftwaremustbesetuptorecordnumbersaccordingtothefollowingtranslationtableasthe
modemisnotdirectlycompatiblewiththeNewZealand(10N)Reversediallingstandard.
Numbertobedialled Numbertoprogramintocomputer
0 0
1 9
2 8
3 7
4 6
5 5
6 4
7 3
8 2
9 1
NotethatwhereDTMFdiallingisused,thenumbersshouldbeenterednormally.