Cabletron Systems 2H253-25R manual Attaching the Strain-Relief Bracket

Page 35

Installing the Device

Installation

Rack mounting the 2H253-25R involves the following:

•Attaching the strain-relief bracket

•Rack mounting the 2H253-25R (attaching the mounting brackets and fastening the device to the rack)

Attaching the Strain-Relief Bracket

Attach the strain-relief bracket to the 2H253-25R as follows:

1.Locate the strain-relief bracket and four 8-32 x 5/16-inch pan-head screws in the rackmount kit.

Do not attempt to attach the strain-relief bracket with screws other than the 8-32 x

!5/16-inch screws included with the 2H253-25R. Use of longer screws may damage the

CAUTION unit.

2.Place the 2H253-25R upside down (as shown in Figure 3-2) on a clean flat surface. Then attach the strain-relief bracket to the bottom of the 2H253-25R using the four 8-32 x 5/16-inch pan-head screws.

Strain-Relief

Bracket Screws

Strain-Relief

Bracket

23	21	19	17	15	13	11	9	7
24	22	20	18	16	14	12	10	8

5 6

3 4

	COM	25R-2H253
	CPU	25R-2H253
	PWR
	SPD-DPX
1	TX-RX
2	MODE
2	LED
	SWITCH WORKGROUP ETHERNET FAST

2762-03

Figure 3-2 Attaching the Strain-Relief Bracket

Installation 3-5

Image 35

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 Structure of this Guide Using this GuideAbout This Guide Xvi Related DocumentsDocument Conventions Document ConventionsPage Overview IntroductionAuto-Negotiation ConnectivitySmartTrunk Full Duplex Switched EthernetRuntime IP Address Discovery Port/VLAN Redirect Functions Remote Monitoring RmonBroadcast Suppression Flow Control Rate LimitingManagement Garp Switch OperationSwitching Options 12 802.1 Port PriorityYear 2000 Compliant Lanview Diagnostic LEDsOptional HSIMs and VHSIMs Standards CompatibilityGetting Help 10BASE-T Network Network Requirements100BASE-TX Network Unpacking the Device InstallationInstalling the Device Installing OptionsGuidelines for Tabletop and Shelf Installations Tabletop or Shelf InstallationGuidelines for the Rackmount Installation Rackmount InstallationAttaching the Strain-Relief Bracket Rack Mounting the 2H253-25R Redundant Primary AC outlets are On separate circuits Connecting PowerConnecting to the Network Straight Cable Connection Completing the Installation Using Lanview TroubleshootingPWR CPU FDX OFF Troubleshooting ChecklistSeries 2E253, 2H252, 2H253, User parameters Position of Mode switch IP address Reset Button Using the Reset ButtonPhysical Properties Device SpecificationsSpeciﬁcations INPUT/OUTPUT Ports Electrical SpecificationsEnvironmental Requirements Regulatory Compliance COM Port Pinout AssignmentsPage Required Tools Optional Installations Mode Switch Bank SettingsRemoving the Chassis Cover Removing the Chassis Cover Figure B-1 Removing the Chassis Cover Switch 6 Forced BootP Setting the Mode SwitchesSimm Upgrade Locating SIMMs Installing the Dram SimmFigure B-4 Installing the Dram Figure B-5 Hsim and Vhsim Connector Locations Installing Optional Hsim or Vhsim Interface ModulesPage Numerics IndexIndex-2