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7-2

HN4000 Hardware Installation Guide 920550-5020 Rev 14

RefertoAppendixEforinformationaboutcontactingTechnicalSupport(viaemailortele‐

phone)oraccessingtheTechnicalSupportWeb‐basedCustomerPortal.

........

Oneormoreofthenumbered2BASE‐TL

LEDsareoff.

Innormaloperation,anumbered2BASE‐TLLEDwillbeoffifthereisno

copperpairconnectedtotheport(orifacopperpairisconnectedattheport

butisnotterminatedatanoperationalremotedevice).

Ifanumbered2BASE‐TLLEDisoffwhenacopperpairisconnected:

1.Verifythatthecopperpairsareterminatedatanoperationalremotedevice.

2.Verifythatthecopperpairsarewiredcorrectlyinthecopper‐pairCAT 5

cable.Referto”Cabling2BASE‐TLPorts” on page 4‐7forwiring

information.

ANetworkLINKLEDisoff. Innormaloperation,theNetworkLINKLEDisonwhenalinkisdetected

betweentheHN4000andaremotedevice.

1.Verifythatacableisconnectedproperlytotheportonanoperational

Ethernetdevice.

ANetworkACTLEDisoff. Innormaloperation,theNetworkACTLEDblinkswhenthedevicedetects

trafficontheNetworkport.

IftheNetworkACTLEDisoffandtheNetworkLINKLEDison:

1.VerifythatthereisEthernettrafficonthenetworkconnection.

TheCoolingUnitFAILLEDison. IftheCoolingUnitFAILLED

ison,itisanindicationthatoneormoreofthe

fansintheCoolingUnithavefailed.Toavoiddamagetotheequipment,the

CoolingUnitshouldbereplacedasdescribedin”CoolingUnitModule

Replacement” on page 6‐5. 

TheFAILLEDwillalsobeonwhennoCoolingUnit

isinstalled.

Note

YoucanverifythattheHN4000LEDsareworkingproperlybypressingandholdingtheLAMPTESTbutton

forabout2seconds.AllLEDsonthefrontpanelshouldturnonuntilyoureleasethebutton.

Table 7-1 HN4000 Troubleshooting Steps (Continued)

Condition Solution

Hatteras HN4000 User Manual

Questions and Answers: