Cabletron Systems 2H253-25R manual Tabletop or Shelf Installation

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Installing the Device

3.3.1Tabletop or Shelf Installation

The following two subsections provide guidelines for installation on a tabletop or shelf.

Guidelines for Tabletop and Shelf Installations

Tabletop and shelf installations must be within reach of the network cabling and meet the requirements listed below:

•Locate the 2H253-25R within seven feet of an appropriately grounded power receptacle that meets the power supply requirements listed in Appendix A.

•In a shelf installation, the shelf must support 13.5 kg (30 lb) of static weight for each 2H253-25R.

•Maintain a temperature of between 5°C (41°F) and 40°C (104°F) at the installation site with ﬂuctuations of less than 10°C (18°F) per hour.

To ensure proper ventilation and prevent overheating, leave a minimum clearance space

!of 5.1 cm (2.0 in) at the left, right, and rear of the 2H253-25R.

CAUTION

•Maintain a 2-inch clearance from the left, right, and rear sides of the device to provide adequate ventilation.

Installation

For a tabletop or shelf installation, locate the 2H253-25R within seven feet of its power source and on an unrestricted free surface area as shown in Figure 3-1. Proceed to Section 3.3.3 for power connection instructions.

Installation 3-3

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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 Xvi Related DocumentsDocument Conventions Document ConventionsPage Overview IntroductionAuto-Negotiation ConnectivityFull Duplex Switched Ethernet Runtime IP Address DiscoverySmartTrunk Remote Monitoring Rmon Broadcast SuppressionPort/VLAN Redirect Functions Flow Control Rate LimitingSwitching Options Garp Switch Operation12 802.1 Port Priority ManagementOptional HSIMs and VHSIMs Lanview Diagnostic LEDsStandards Compatibility Year 2000 CompliantGetting 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 ButtonDevice Specifications SpeciﬁcationsPhysical Properties Electrical Specifications Environmental RequirementsINPUT/OUTPUT Ports 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