Cabletron Systems 2H253-25R manual Removing the Chassis Cover

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Removing the Chassis Cover

B.2 REMOVING THE CHASSIS COVER

This section describes how to remove the 2H253-25R chassis cover.

DO NOT REMOVE THE COVER FROM THE 2H253-25R WHILE POWER IS APPLIED TO THE UNIT. HAZARDOUS VOLTAGES ARE PRESENT AND COULD CAUSE PERSONAL INJURY AND/OR DAMAGE THE UNIT.

DO NOT POWER UP THE 2H253-25R AGAIN UNTIL THE COVER AND SCREWS ARE IN PLACE.

DECKEL VON DAS 2H253-25R NICHT ABZIEHEN UNTER SPANNUNG. GEFAHR FÜR DAS PERSONNAL UND/ODER DAS GERÄT WEGEN GEFÄHRLICHE SPANNUNGEN ENSTEHT.

2H253-25R NICHEINSCHALTEN SO LANG DER DECKEL UND SCHRAUBEN NICHT EINGEBAUT SIND.

NO DEBE DE REMOVER LA TAPA DURENTE QUE ESTE CONELTADO A LA CORRIENTE, UNA DESCARGA ELECTRICA LE PUEDE CAUSAR Y PROBOCARLE DAÑ OS, AL IGUAL QUE AL APARATO.

NO ENCHUFE A LA CORRIENTE HASTA QUE LA TAPA Y LOS TORNILLOS ESTEN EN SU LUGAR.

CAUTION: THIS UNIT MAY HAVE MORE THAN ONE POWER SUPPLY CORD. DISCONNECT TWO POWER SUPPLY CORDS BEFORE SERVICING TO AVOID ELECTRIC SHOCK.

VORSICHT: DIESES GERÄT HAT MEHR ALS EINEN NETZANSCHLUß. TRENNEN SIE VOR WARTUNGSARBEITEN DIE 2 NET ZANSCHLÜSSE VOM NETZ, UM ELEKTRISCHE SCHLÄGE ZU VERMEIDEN.

ATTENTION: CET APPAREIL COMPORTE PLUS D’UN CORDON D’ALIMENTATION. RAFIN DE PREVENIR LES CHOCS ELECTRIQUES, DEGRANCHER LES DEUX CORDONS D’ALIMENTATION AVANT DE FAIRE LE DEPANNAGE.

B-2Optional Installations and Mode Switch Bank Settings

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Contents 2H253-25R SmartSwitch Installation User’s Guide Page Page FCC Notice Cabletron SYSTEMS, INC Program License Agreement Page Page Page Cabletron Systems Limited Program License Agreement Viii Declaration of Conformity Page Contents Troubleshooting Figures Tables Using this Guide About This GuideStructure of this Guide Related Documents XviDocument Conventions Document ConventionsPage Introduction OverviewConnectivity Auto-NegotiationFull Duplex Switched Ethernet Runtime IP Address DiscoverySmartTrunk Remote Monitoring Rmon Broadcast SuppressionPort/VLAN Redirect Functions Rate Limiting Flow Control12 802.1 Port Priority Garp Switch OperationSwitching Options ManagementStandards Compatibility Lanview Diagnostic LEDsOptional HSIMs and VHSIMs Year 2000 CompliantGetting Help Network Requirements 10BASE-T Network100BASE-TX Network Installation Unpacking the DeviceInstalling Options Installing the DeviceTabletop or Shelf Installation Guidelines for Tabletop and Shelf InstallationsRackmount Installation Guidelines for the Rackmount InstallationAttaching the Strain-Relief Bracket Rack Mounting the 2H253-25R Connecting Power Redundant Primary AC outlets are On separate circuitsConnecting to the Network Straight Cable Connection Completing the Installation Troubleshooting Using LanviewPWR CPU FDX Troubleshooting Checklist OFFSeries 2E253, 2H252, 2H253, User parameters Position of Mode switch IP address Using the Reset Button Reset ButtonDevice Specifications SpecificationsPhysical Properties Electrical Specifications Environmental RequirementsINPUT/OUTPUT Ports COM Port Pinout Assignments Regulatory CompliancePage Optional Installations Mode Switch Bank Settings Required ToolsRemoving the Chassis Cover Removing the Chassis Cover Figure B-1 Removing the Chassis Cover Setting the Mode Switches Switch 6 Forced BootPSimm Upgrade Installing the Dram Simm Locating SIMMsFigure B-4 Installing the Dram Installing Optional Hsim or Vhsim Interface Modules Figure B-5 Hsim and Vhsim Connector LocationsPage Index NumericsIndex-2