Cabletron Systems STHI manual Installing the Sthi, Stacking the Sthi, Rack-Mounting the Sthi

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Installing the STHI

3.1.2Stacking the STHI

The rear panel of the STHI has four STACK ports exclusively reserved for connections to STH modules. Refer to the STH manual for stacking instructions.

3.1.3Attaching the Strain Relief Bracket

To reduce lateral stresses imposed on TCU ports and cable plugs by the weight of cables hanging from the TCU ports of a horizontally mounted STHI, the strain relief bracket ensures that cable forces pull nearly straight out from the port, rather than prying sharply downward.

Attach the strain relief bracket to the front of the STHI as follows:

1.Locate the strain relief bracket and four 8-32 x 3/8” screws.

Use of longer screws may cause damage to the unit or WARNING electrical shock to the user.

2.Carefully turn the STHI upside down.

3.Attach the strain relief bracket to the bottom of the STHI as shown in Figure 3-1.

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CABLE UTP OHM 100 SUPPORTING ® LANVIEWWITH HUB RING TOKEN HubSTACK

Figure 3-1. Attaching the Strain Relief Bracket

3.1.4Rack-Mounting the STHI

Perform these steps to install the STHI in a 19-inch rack:

1.Remove the four cover screws (two from each side) located near the front-most edges of each side of the STHI.

2.Using the four screws removed in step 1, attach the rack-mounting brackets to each side of the STHI as shown in Figure 3-2.

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Contents Sthi Intelligent Token Ring Stackable HUB USER’S Guide Page FCC Notice Cabletron Software Program License United States Government Restricted Rights Requirements & Specifications InstallationIntroduction Local Management TroubleshootingAppendix a Tpim Specifications Appendix B Media Specifications Sthi Overview Contents of This ManualLanview LEDs Sthi OverviewLobe Port and Multiple Ring Out Port Configurations Ring Speed Fault ProtectionTCU Ports 3 RI & RO Ports Daughter Board Upgrade KitMedia Type Connector Active CircuitryAutomatic Beacon Recovery Process Hub-By-Hub Bypass ControlSupport for Passive MAU Workgroups Improved Protection from Beaconing Flash DownloadsIP Address Discovery DAISY-CHAIN MAU Configuration Local Management Related ManualsGetting Help Related ManualsGetting Help Maximum Number of Stations on a Ring General Networking ConsiderationsCrosstalk TemperatureInstallation Recommendations General Networking ConsiderationsTCU and COM Ports Operating SpecificationsOperating Specifications Hubstack Interconnect CablesRJ45 to DB25 Connector Pinout Ring Speed Supported MIB GroupsStandard MIBs Cabletron Enterprise MIBsRing Sequence SafetyPhysical Specifications Computing HardwareEnvironmental Requirements Unpacking the Sthi Installing the SthiRack-Mounting the Sthi Installing the SthiStacking the Sthi Attaching the Strain Relief BracketRack Mounting Brackets Wall-Mounting the SthiInstalling the Sthi Wall-mounting the Sthi Free-Standing InstallationsConnecting the Sthi to the Power Source Tpim InstallationFinishing the Installation Tpim InstallationColor Condition Lanview LED SignalsFailure to Link on Enabled Port Trouble ResolutionTrouble Resolution Loss Of PowerManagement Failure Reset ButtonReset Button Reset ButtonNvram Reset Switch Nvram Reset SwitchLocal Management Accessing LMAccessing LM Dumb Terminal ConfigurationMenu Parameter Setting Entering LM Console Cable ConfigurationWorking with LM Screens Using LM ScreensUsing LM Screens Invoking Menu Options or Screen CommandsExiting the Local Management Interface Session Setting or Modifying FieldsSystem Level Password Screen Main Menu Device Setup StatusScreen Hierarchy Screen IntroductionsDevice Statistics Snmp TrapsChassis Status View Component StatusIP Address System Level ScreenSystem Level Screen System Date and System TimeEnable IP Address Discovery Subnet MaskRetry Interval Number of Retries Enable Beacon RecoveryMAC Address Locally Administered AddressSnmp Community Names Screen Snmp Community Names ScreenRead-write Access PolicyCommunity Name Read-onlyTrap Destination Enable TrapsSnmp Traps Screen Snmp Traps ScreenFunctions of the Chassis Status View Screen Screen Mode Screen CommandChassis Status View Screen Chassis Status View ScreenMultiplexer Configuration Fields Administrative Mode Port Configuration FieldsEach port field whether Tpim or TCU may be set as follows Ring OUT Enable Mode Each Ring port Tpim port or Ring Out TCU may be listed as Operational ModeComponent Status Screen Component Status ScreenNext and Previous Device Statistics Screen Device Statistics ScreenAccumulate Screen ModeBeacon States Errors ReceivedFrames Received KBytes ReceivedStations on a Ring Ports EnabledRing Status Ring NumberAC Errors Isolating Errors Fields GroupLine Errors Burst ErrorsFrame Copied Errors Internal ErrorsNon-Isolating Errors Group Lost Frame ErrorsSnmp Tool Screen Token ErrorsFrequency Errors Snmp Tool Screen3 GET OID PrependStep GetnextWalk Cycles9 SET Firmware Image Downloads RepeatCtDLCommitRAMtoFlash Twisted Pair Tpim Pinouts OverviewFiber Optic Tpim Specifications Fiber Optic Tpim SpecificationsTPIM-F2 for Multimode Fiber Parameter Typical Worst CaseBudget Parameter Typical Minimum Maximum TPIM-F3 for Single Mode FiberA-5 UTP Cable Categories Unshielded Twisted Pair UTPPer 100m @ ≥100m Operating Electrical SignalUnshielded Twisted Pair UTP Attenuation Loss Cat FrequencyCategory Shielded Twisted Pair STPShielded Twisted Pair STP @ 4 Mbps @ 16 MbpsMixed STP Cable Types Operational Attenuation perType Frequency 1000 m 1000 ft STP Lobe LengthsTotal Maximum Single Mode and Multimode Fiber Optic CablingSingle Mode and Multimode Fiber Optic Cabling Max. Lobe Length Max. Drive Distance Type Mbps