Hatteras HN4000 User Manual

920550-5020 Rev 14 HN4000 Hardware Installation Guide
1
Troubleshooting
7
TheproceduresfortroubleshootingtheHN4000hardwareareprovidedinTable7‐1.Thesteps
withintheproceduresarelistedinthesuggestedorderthattheybeperformed.
Figure 7-1 Device Connectors and LEDs
Table 7-1 HN4000 Troubleshooting Steps
Condition Solution
Allfront‐panelLEDsareoff. 1.Verifythatthedeviceisreceiving‐48VDCpower.
2.Verifythatthepowercableiswiredcorrectly(see”InstallingtheGround
andPowerCables” on page 2‐6).
3.Ifonlyonepowersourceisbeingused,switchthepowercablestothe
connectionthatisnotinuse(forexample,tothe“B”connectionifthe“A ” 
connectionsarebeingused.
4.Replacethedevicewithaunitknowntobeinproperworkingcondition.
TheredSystemFAILLEDison. Innormaloperation,thesystemFAILLEDwillblinkonandoffimmediately
afterthe
deviceispoweredup(whilethedevicerunsitsself‐testdiagnostics).
IfthesystemFAILLEDisonafterdiagnosticshaverun,itindicatesthatthe
devicehasdetectedahardwareproblem.
1.Removepowerfromthedeviceandpoweritbackup.
2.Replacethedevicewithaunitknown
tobeinproperworkingcondition.
Field replaceable high-
speed network module
with dual-redundant ports
Modular, field
replaceable cooling
unit
Redundant
power
inputs
Subscriber ports - 40 pairs of
2BASE-TL and bonded 2BASE-TL
10/100
Management
Port
Main
chassis
Serial Craft
Port
System
Status LEDs
Stack
ports
MLT
ports
Alarm
port
Grounding
lug

Hatteras HN4000 Specifications

General

Brand	Hatteras
Model	HN4000
Category	Switch
Language	English