Fiberplex FOM-3841 User manual

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USERMANUAL
4ChannelPOTSTelephoneFiberConverter
FOM‐3841/3842

WarningforYourProtection
1.Readtheseinstructions.
2.Keeptheseinstructions.
3.Heedallwarnings.
4.Followallinstructions.
5.Donotusethisapparatusnearwater.
6.Cleanonlywithadrycloth.
7.Donotblockanyoftheventilationopenings.Installinaccordancewiththemanufacturer’sinstructions.
8.Donotinstallnearanyheatsourcessuchasradiators,heatregisters,stoves,orotherapparatus(includingamplifiers)thatproduceheat.
9.Donotdefeatthesafetypurposeofthepolarizedorgrounding‐typeplug.Apolarizedplughastwobladeswithonewiderthantheother.A
groundingtypeplughastwobladesandathirdgroundingprong.Thewidebladeorthethirdprongisprovidedforyoursafety.Iftheprovidedplug
doesnotfitintoyouroutlet,consultanelectricianforreplacementoftheobsoleteoutlet.
10.Protectthepowercordfrombeingwalkedonorpinched,particularlyatplugs,conveniencereceptacles,andthepointwheretheyexitfromthe
apparatus.
11.Onlyuseattachments/accessoriesspecifiedbythemanufacturer.
12.Useonlywiththecart,stand,tripod,bracket,ortablespecifiedbythemanufacturer,orsoldwiththeapparatus.Whenacartisused,use
cautionwhenmovingthecart/apparatuscombinationtoavoidinjuryfromtip‐over.
13.Unplugthisapparatusduringlightningstormsorwhenunusedforlongperiodsoftime.
14.Referallservicingtoqualifiedservicepersonnel.Servicingisrequiredwhentheapparatushasbeendamagedinanyway,suchaspower‐supply
cordorplugisdamaged,liquidhasbeenspilledorobjectshavefallenintotheapparatus,theapparatushasbeenexposedtorainormoisture,does
notoperatenormally,orhasbeendropped.
Theapparatusshallnotbeexposedtodrippingorsplashing.Noobjectsfilledwithliquids,suchasvasesordrinkcups,shallbeplacedonthe
apparatus.
“WARNING:Toreducetheriskoffireorelectricshock,donotexposethisapparatustorainormoisture.”
GeneralInstallationInstructions
Pleaseconsiderthesegeneralinstructionsinadditiontoanyproduct‐specificinstructionsinthe“Installation”chapterofthismanual.
Unpacking
Checktheequipmentforanytransportdamage.Iftheunitismechanicallydamaged,ifliquidshavebeenspilledorifobjectshavefallenintothe
unit,itmustnotbeconnectedtotheACpoweroutlet,oritmustbeimmediatelydisconnectedbyunpluggingthepowercable.Repairmustonlybe
performedbytrainedpersonnelinaccordancewiththeapplicableregulations.
InstallationSite
Installtheunitinaplacewherethefollowingconditionsaremet:
 Thetemperatureandtherelativehumidityoftheoperatingenvironmentmustbewithinthespecifiedlimitsduringoperationofthe
unit.Valuesspecifiedareapplicabletotheairinletsoftheunit.
 Condensationmaynotbepresentduringoperation.Iftheunitisinstalledinalocationsubjecttolargevariationsofambient
temperature(e.g.inanOB‐van),appropriateprecautionsmustbetaken.
 Unobstructedairflowisessentialforproperoperation.Ventilationopeningsoftheunitareafunctionalpartofthedesignandmust
notbeobstructedinanywayduringoperation(e.g.‐byobjectsplaceduponthem,placementoftheunitonasoftsurface,or
improperinstallationoftheunitwithinarackorpieceoffurniture).
 Theunitmustnotbeundulyexposedtoexternalheatsources(directsunlight,spotlights).
AmbientTemperature
UnitsandsystemsbyFiberPlexaregenerallydesignedforanambienttemperaturerange(i.e.temperatureoftheincomingair)of+5...+40°C.
Whenrackmountingtheunits,thefollowingfactsmustbeconsidered:
 Thepermissibleambienttemperaturerangeforoperationofthesemiconductorcomponentsis0°Cto+70°C(commercial
temperaturerangeforoperation).
 Theairflowthroughtheinstallationmustallowexhaustairtoremaincoolerthan70°Catalltimes.
 Averagetemperatureincreaseofthecoolingairshallbeabout20C°,allowingforanadditionalmaximum10C°increaseatthe
hottestcomponents.
Ifthecoolingfunctionoftheinstallationmustbemonitored(e.g.forfanfailureorilluminationwithspotlamps),theexhaustairtemperaturemust
bemeasureddirectlyabovethemodulesatseveralplaceswithintheenclosure.
GroundingandPowerSupply
Groundingofunitswithmainssupply(classIequipment)isperformedviatheprotectiveearth(PE)conductorintegratedinthreepinPhoenix™
connector.Unitswithbatteryoperation(<60V,classIIIequipment)mustbeearthedseparately.Groundingtheunitisoneofthemeasuresfor
protectionagainstelectricalshockhazard(dangerousbodycurrents).Hazardousvoltagemaynotonlybecausedbydefectivepowersupply
insulation,butmayalsobeintroducedbytheconnectedaudioorcontrolcables.
Thisequipmentmayrequiretheuseofadifferentlinecord,attachmentplug,orboth,dependingontheavailablepowersourceatinstallation.If
theattachmentplugneedstobechanged,referservicingtoqualifiedpersonnel.

Warranty,ServiceandTermsandConditionsofSale
ForinformationaboutWarrantyorServiceinformation,pleaseseeourpublished‘TermsandConditionsof
Sale’.Thisdocumentisavailableonfiberplex.comorcanbeobtainedbyrequestingitfrom
[email protected]orcalling301.604.0100.
Disposal
DisposalofPackingMaterials
Thepackingmaterialshavebeenselectedwithenvironmentalanddisposalissuesinmind.Allpackingmaterial
canberecycled.Recyclingpackingsavesrawmaterialsandreducesthevolumeofwaste.Ifyouneedto
disposeofthetransportpackingmaterials,recyclingisencouraged.
DisposalofUsedEquipment
Usedequipmentcontainsvaluablerawmaterialsaswellassubstancesthatmustbedisposedof
professionally.Pleasedisposeofusedequipmentviaanauthorizedspecialistdealerorviathepublicwaste
disposalsystem,ensuringanymaterialthatcanberecycledhasbeen.Pleasetakecarethatyourused
equipmentcannotbeabused.Afterhavingdisconnectedyourusedequipmentfromthemainssupply,make
surethatthemainsconnectorandthemainscablearemadeuseless.
Disclaimer
Theinformationinthisdocumenthasbeencarefullycheckedandisbelievedtobeaccurateatthetimeof
publication.However,noliabilityisassumedbyFiberPlexforinaccuracies,errors,oromissions,norforlossor
damageresultingeitherdirectlyorindirectlyfromuseoftheinformationcontainedherein.


Introduction
TheFOM‐3841andFOM‐3842providecompleteelectricalisolationforfourindependentchannelsof2‐wire
telephonecommunications.TheFOM‐3842supportsstandardanalogphones,STU‐III(securetelephoneunit)
phones,STE(securetelephoneequipment)phones,faxmachines,andmodemsandsupportsCallerID.
TheunitscanbeusedinareasofhighelectricalnoiseorinandoutofRFshieldedenclosures.Thefiberoptic
cableisnotsusceptibletointerferencecausedbyimpulsenoise,crosstalk,orEMI.Privacyofcommunications
isalsoenhancedbecausethefiberopticcabledoesnotradiateanyemissions.Inaddition,fiberopticcable
offersmuchlongertransmissiondistancesthantraditionaltelephonelinecordwiring.Multimodeopticson
theunitscanextendthedistanceto2km,whilesinglemodeopticscanfurtherextendthedistanceto20km.A
typicallinkconsistsofanFOM‐3841connectedtothePOTSlineandanFOM‐3842atthesubscriber’sphone
withaduplexfiberopticcablebetweenthem.
KeyFeatures
 ChannelTelephonetoFiberModule
 TypicalApplicationsInclude:
o StandardPOTSTelephones
o STU‐IIIandSTEPhones
o FaxMachines
o Modem
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GettingStarted
InitialInspection
Immediatelyuponreceipt,inspecttheshippingcontainerfordamage.Thecontainershouldberetaineduntil
theshipmenthasbeencheckedforcompletenessandtheequipmenthasbeencheckedmechanicallyand
electrically.Iftheshipmentisincomplete,ifthereismechanicaldamage,oriftheunitfailstooperatenotify
FiberPlexandmaketheshippingmaterialsavailableforthecarrier'sinspection.


TypicalApplication




Features
RearIndicators/Connections

Figure1:FOM‐3841/3842Rear

1
1
1
2 2
3 3
4
6
5
6

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
ChassisMountingScrews(x2)–ThesecaptivefastenerssecuretheFOMcardinthechassis.Theheads
areknurledsothatnotoolisrequiredformounting/dismounting.
OpticsStatusLED–ThisLED,foreachposition,indicatesstatusasperthefollowingtable;











StatusLED–ThisLED,foreachposition,indicatesstatusasperthefollowingtable;





RJ‐11Exchange(FXO)Connectors–Connecttoexchangeattheseports.Seepinouttablebelow.
RJ‐11Instrument(FXS)Connectors–Connecttoinstrumentattheseports.Seepinouttablebelow.
RJ‐11Pinout
Pin Description 
1 
2 
3 Ring(‐)
4 Tip(+)
5 
6 

OpticalFiberConnections–ThispositionmaybeapairofSTconnectors,LCconnectorsoranSFPslot,if
soordered.




OpticsStatusLED
Status Description
SteadyGreen Opticsinsyncateachendoflink
FlashingGreen LocalopticalRXisreceivingerrors
SteadyYellow RemoteopticalRXlossofsignalorsync
FlashingYellow LocalopticalRXsignalpresent,butnosync
FlashingOrange Cardtypemismatchatremoteend;thetwocardsarenotcompatible
SteadyRed NoopticalRXsignal
Off Cardfailure
PowerStatusLED
Status Description
SteadyGreen Cardpowersupplynormaloperation
SteadyRed Cardpowersupplyfailureorinover‐currentprotection
Off Cardfailureormainpowerfailure
1
2
3
4
6
5

FrontDisplays

Figure2FOM‐3841/3842FrontDisplay
TheseLEDsindicatesstatusasperthefollowingtable


POT S Exchange
Power
Optics
SW Option
Off Hook
Off Hook
Off Hook
Off Hook
Ringing
Ringing
Ringing
Ringing
CH 1
CH 2
CH 3
CH 4
FOM-3842
POTS Subscriber
Power
Optics
SW Option
Off Hook
Off Hook
Off Hook
Off Hook
Ringing
Ringing
Ringing
Ringing
Ring Down
CH 1
CH 2
CH 3
CH 4
DisplayLEDIndicators
Label Status Description
Power SteadyGreen Thepowersuppliesonthecardareoperatingproperly.
SteadyRed Thepowersuppliesonthecardarenotregulatingthecorrectvoltagesorthereisan
openfuseonthecard.Unplugthepowerfromthecardfor30secondsandthenplug
itinagainsothatthefuseonthecardhastimetoreset.IfthePowerledisstillredor
notaconstantgreen,replacethecard.
Off Cardfailureormainpowerfailure.
Optics SteadyGreen Opticsinsyncateachendoflink
FlashingGreen LocalopticalRXisreceivingerrors
SteadyYellow RemoteopticalRXlossofsignalorsync
FlashingYellow LocalopticalRXsignalpresent,butnosync
FlashingOrange Cardtypemismatchatremoteend;thetwocardsarenotcompatible
SteadyRed NoopticalRXsignal
Off Cardfailure
SWOption SteadyGreen NoFunction
OffHook Yellow Lineisoffhook
Off Lineisonhook
Ringing Yellow Lineisringing
Off Lineisidle
RingDown Yellow Fom‐3842ispairedwithanotherFOM‐3842for4‐channelringdown
Off NormalPOTSoperation

PowerRequirementsandMounting
FlexiblemountingallowstheFOM‐5400tobemountedinanyofanumberofFOM‐serieschassis.
ChassismountingusingRMC‐5000
Combinationsofupto16FiberPlexFOM‐seriescardsmaybeinstalledintoaRMC‐5000rackchassis.Aloaded
RMC‐5000isshownbelow;

Figure3FOMCardbeinginstalledintoanRMC‐5000
StandaloneusingSAC‐1‐AC
SingleFOM‐seriescardsmaybeinstalledintotheSAC‐1chassis,eitherdesk,wall,orrackmounted,depending
ontheaccessorybrackets(includedineverySAC‐1shipment)utilized.


Figure4FOMCardbeinginstalledinaSAC‐1‐AC


InsertingandRemovingSFPModules


IdentifytheLatchTypeoftheSFPModule
SFPModuleshavevariouslatchingmechanismstosecurethemintotheSFPCageofadevice.FiberPlex
ModulescansupportahostofmanufacturersandbrandsofSFPModulessotheusermayencounterany
numberofdifferentlatches.Someofthesearedescribedbelow.
BailClasp
ThebailclaspSFPmodulehasaclasp
thatyouusetoremoveorinstalltheSFP
module.

ActuatorButton
TheactuatorbuttonSFPmoduleincludesabuttonthatyou
pushinordertoremovetheSFPmodulefromaport.This
buttoncaneitherlift‘Up’orpress‘In’toreleasetheSFP
Moduledependingonthemanufacturer.

MylarTab
TheMylartabSFPmodulehasatabthat
youpulltoremovethemodulefroma
port.

SlideTab
TheslidetabSFPmodulehasatabunderneaththefrontofthe
SFPmodulethatyouusetodisengagethemodulefromaport.


HandlingWarnings
SFPModulesarestaticsensitive.Topreventdamagefromelectrostaticdischarge(ESD),itis
recommendedtoattachanESDpreventativewriststraptoyourwristandtoabaremetalsurfacewhen
youinstallorremoveanSFPModule.
DisconnectallopticalorcoppercablesfromSFPModulespriortoinstallingorremovingtheSFPModule.
Failuretodosocouldresultindamagetothecable,cableconnectorortheSFPModuleitself.Removing
andinsertinganSFPModulecanshortenitsusefullife,soyoushouldnotremoveandinsertSFPModules
anymoreoftenthanisabsolutelynecessary.
ProtectopticalSFPmodulesbyinsertingcleandustcoversintothemafterthecablesareremoved.Be
suretocleantheopticsurfacesofthefibercablesbeforeyouplugthembackintotheopticalportsof
anotherSFPmodule.AvoidgettingdustandothercontaminantsintotheopticalportsofyourSFP
modules,becausetheopticswillnotworkcorrectlywhenobstructedwithdust.

InsertingaModule
1) AttachanESD‐preventativewrist
oranklestrap,followingits
instructionsforuse.
2) Disconnectandremoveall
interfacecablesfromSFPModule.
3) IftheSFPModulehasaBailClasp,
closetheBailClaspbefore
insertingtheSFPModule.
4) Withthegoldfingerconnectoronthebottomandthelabelonthetop,lineuptheSFPModule
withtheemptycageandslideitinmakingsurethatitiscompletelyinsertedandseatedinthe
cage.

RemovingaModule
1) AttachanESD‐preventative
wristoranklestrap,
followingitsinstructionsfor
use.
2) Disconnectandremoveall
interfacecablesfromSFP
Module.
3) Releasethelatching
mechanism.
 BailClasp–OpenthebailclaspontheSFPModulewithyourfingerinadownward
direction.
 ActuatorButton–Gentlypresstheactuatorup(orin)whilepullingthebodyoftheSFP
ModuletoreleasetheSFPModulefromthecage.
 MylarTab–Pullthetabgentlyinastraightoutward
motionuntilitdisengagesfromtheport.Makesurethe
tabisnottwistedwhenpullingasitmaybecome
disconnectedfromtheSFPModule.
 SlideTab‐Withyourthumb,pushtheslidetabonthe
bottomfrontoftheSFPmoduleinthedirectionofthe
equipmenttodisengagethemodulefromthelinecard
port.IfyoupullontheSFPmodulewithoutdisengaging
thetab,youcandamagetheSFPmodule.
4) GrasptheSFPModulebetweenyourthumbandindexfingerand
carefullyremoveitfromtheport
5) PlacetheSFPModuleonanantistaticmat,orimmediatelyplaceitinastaticshieldingbagor
container




DIPSwitchSettings
SwitchDesignations
Asshownbelow,eachDIPswitchisassignedanumericaldesignationwhichiskeyedtothedescriptivetext;


Figure5FOM‐3841/3842DIPSwitches







SwitchSettings 
Switch Parameter 
S1.1
Reserved

S1.2
S1.3
S1.4 Channel1RingMode DOWN(OFF)‐NormalRinging
UP(ON)–UnbalancedRing
S1.5
Reserved

S1.6
S1.7
S1.8 Channel2RingMode DOWN(OFF)‐NormalRinging
UP(ON)–UnbalancedRing
 
S1.1
Reserved

S1.2
S1.3
S1.4 Channel3RingMode DOWN(OFF)‐NormalRinging
UP(ON)–UnbalancedRing
S1.5
Reserved

S1.6
S1.7
S1.8 Channel4RingMode DOWN(OFF)‐NormalRinging
UP(ON)–UnbalancedRing
 
S3.1
Reserved

S3.2
S3.3
S3.4
S3.5 RemoteConfiguration DOWN(OFF)‐Allowremoteconfiguration
UP(ON)–Inhibitremoteconfiguration
S3.6 Reserved 
S3.7
S3.8 LEDoperationMode
NormalLEDoperationsettingwillcausethefrontpaneldisplaytoflasheach
oftheindicatorsanalternatingredandgreenforverificationpurposes.The
unitcontinuestofunctionnormally‐onlythedisplayisaffected.

DOWN(OFF)‐Normalindicatoroperationselected.
UP(ON)‐Allindicatorsalternatelyflashredorgreen.

Specifications

Figure6:FOM‐3841/3842Dimensions
.80
[20.4]
11.5 0 X
.50
[12.7]
5.22X




OtherConsiderations
SFPMSACompliance
TheSFPMultisourceAgreement(MSA)isanagreementthatwasdraftedamongcompetingmanufacturersof
SFPopticalmodules.TheSFFCommitteewasformedtooverseethecreationandmaintenanceofthese
agreementsincludingtheSFPMSAdesignatedasINF‐8074i.Thisagreementdescribesamutuallyagreedupon
standardfortheformandfunctionofSFPmodules.However,notallSFPsproducedareMSAcompliant.The
MSAprovidesforatransceiver(TX/RX)pinout.OtherindustriessuchasbroadcasthadtheneedfordualTX
anddualRXSFPforuni‐directionalapplicationssuchasvideo.Naturally,anon‐MSAstandardwasintroduced
allocatingpinoutassignmentsfordualoutputanddualinputI/Oconfigurations.Inaddition,thesomeofthe
internalserialcommunicationpinswerereassigned.
TheFOM‐3841/3842willonlyacceptMSAcompliantSFPModules.

ELECTRICALSPECIFICATIONS
Min Typ Max Unit
PowerRequirement VoltageRange 20 24 34 V
SupplyCurrent ‐ 250 ‐ mA
Min Typ Max Unit
Environmental StorageTemperature ‐40 ‐ 85 °C
OperatingTemperature 0 ‐ 50 °C
InterfaceConnector FOM‐384x RJ11(x4)
Min Typ Max Unit
Audio
InputLevel ‐ ‐ 5 dBm
LoadImpedance ‐ 600 ‐ Ω
FrequencyResponse(±3dB) 200 ‐ 8000 Hz
OPTICALSPECIFICATIONS
OrderSuffix Fiber FiberType Connector λ
(nm)
TransmitterPower
(dBm)
ReceiverSensitivity
(dBm)
T12 Multimode OM2 ST 850 ‐5 ‐20
T22 Multimode OM2 ST 1310 ‐12 ‐26
L12 Multimode OM2 LC 850 ‐9.5 ‐17
L22 Multimode OM2 LC 1310 ‐15 ‐24
T5B Singlemode OS1,OS2 ST 1310 ‐11 ‐23
L5B Singlemode OS1,OS2 LC 1310 ‐9.5 ‐19
C SFPCagewithnoOpticalModuleInstalled
ExternalSFPInterface Min Typ Max Unit
DataRate ‐ 245 ‐ Mbps
RecommendedJitter ‐ 40 ‐ psec
OperatingVoltage ‐ 3.3  VDC
MaximumCurrent ‐ ‐ 500 mA
OpticalModules SFPMSA(SFF‐8431,SFF‐8432,SFF‐8433)compliantslot,datarate1.25Gbps
PHYSICALSPECIFICATIONS
CaseDimensions Length Width Height Weight
FOM‐384x 12.0in(305mm) 0.80in(20mm) 5.22in(133mm) 0.4lb(0.18kg)





18040-412 Guilford Rd. • Annapolis Junction, MD 20701
fiberplex.com • [email protected]
• 301.604.0100

UMFOM384x
170822
