Nvram Reset Switch

4.4 NVRAM Reset Switch

The STHI incorporates a recessed NVRAM Reset switch (see Figure 4-2) which initializes NVRAM, the nonvolatile random access memory. To use it, toggle the switch and then reset the STHI. This clears all user configurations and settings and returns the STHI to its factory defaults.

STHIHubSTACK TOKEN RING			HUB
-24	SUPPORTING		HUB		WITH
		100 OHM			WITH
				UTP CABLELANVIEW®
4M
16M
SPEED
	RESET				CPU
	COM				CPU
	COM				16 Mb/s	ACT
						MGMT

24X

23X

22X

21X

20X

19X

18X

17X

16X

15X

14X

13X

12X

11X

10X

Figure 4-2. NVRAM Switch

NVRAM RESET SWITCH IN HERE

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Image 35

Cabletron Systems STHI manual Nvram Reset Switch

Contents

Sthi Intelligent Token Ring Stackable HUB USER’S Guide Page FCC Notice Cabletron Software Program License United States Government Restricted Rights Introduction Requirements & SpecificationsInstallation Local Management Troubleshooting Appendix a Tpim Specifications Appendix B Media Specifications Sthi Overview Contents of This Manual Lanview LEDs Sthi Overview TCU Ports Lobe Port and Multiple Ring Out Port ConfigurationsRing Speed Fault Protection 3 RI & RO Ports Daughter Board Upgrade KitMedia Type Connector Active Circuitry Support for Passive MAU Workgroups Automatic Beacon Recovery ProcessHub-By-Hub Bypass Control IP Address Discovery Improved Protection from BeaconingFlash Downloads DAISY-CHAIN MAU Configuration Local Management Related ManualsGetting Help Related Manuals Getting Help Maximum Number of Stations on a Ring General Networking Considerations Crosstalk TemperatureInstallation Recommendations General Networking Considerations TCU and COM Ports Operating SpecificationsOperating Specifications Hubstack Interconnect Cables RJ45 to DB25 Connector Pinout Ring Speed Supported MIB GroupsStandard MIBs Cabletron Enterprise MIBs Ring Sequence Safety Environmental Requirements Physical SpecificationsComputing Hardware Unpacking the Sthi Installing the Sthi Rack-Mounting the Sthi Installing the SthiStacking the Sthi Attaching the Strain Relief Bracket Rack Mounting Brackets Wall-Mounting the Sthi Installing the Sthi Wall-mounting the Sthi Free-Standing Installations Connecting the Sthi to the Power Source Tpim InstallationFinishing the Installation Tpim Installation Color Condition Lanview LED Signals Failure to Link on Enabled Port Trouble ResolutionTrouble Resolution Loss Of Power Management Failure Reset ButtonReset Button Reset Button Nvram Reset Switch Nvram Reset Switch Local Management Accessing LM Menu Parameter Setting Accessing LMDumb Terminal Configuration Entering LM Console Cable Configuration Working with LM Screens Using LM ScreensUsing LM Screens Invoking Menu Options or Screen Commands Exiting the Local Management Interface Session Setting or Modifying Fields System Level Password Screen Main Menu Device Setup StatusScreen Hierarchy Screen Introductions Device Statistics Snmp TrapsChassis Status View Component Status IP Address System Level ScreenSystem Level Screen System Date and System Time Retry Interval Enable IP Address DiscoverySubnet Mask Number of Retries Enable Beacon Recovery MAC Address Locally Administered AddressSnmp Community Names Screen Snmp Community Names Screen Read-write Access PolicyCommunity Name Read-only Trap Destination Enable TrapsSnmp Traps Screen Snmp Traps Screen Functions of the Chassis Status View Screen Screen Mode Screen CommandChassis Status View Screen Chassis Status View Screen Multiplexer Configuration Fields Administrative Mode Port Configuration Fields Each 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 Mode Next and Previous Component Status ScreenComponent Status Screen Device Statistics Screen Device Statistics Screen Accumulate Screen Mode Beacon States Errors ReceivedFrames Received KBytes Received Stations on a Ring Ports EnabledRing Status Ring Number AC Errors Isolating Errors Fields GroupLine Errors Burst Errors Frame Copied Errors Internal ErrorsNon-Isolating Errors Group Lost Frame Errors Snmp Tool Screen Token ErrorsFrequency Errors Snmp Tool Screen 3 GET OID Prepend Step Getnext 9 SET WalkCycles Firmware Image Downloads Repeat CtDLCommitRAMtoFlash Twisted Pair Tpim Pinouts Overview Fiber Optic Tpim Specifications Fiber Optic Tpim Specifications Budget TPIM-F2 for Multimode FiberParameter Typical Worst Case Parameter Typical Minimum Maximum TPIM-F3 for Single Mode Fiber A-5 UTP Cable Categories Unshielded Twisted Pair UTP Per 100m @ ≥100m Operating Electrical SignalUnshielded Twisted Pair UTP Attenuation Loss Cat Frequency Category Shielded Twisted Pair STPShielded Twisted Pair STP @ 4 Mbps @ 16 Mbps Mixed STP Cable Types Operational Attenuation perType Frequency 1000 m 1000 ft STP Lobe Lengths Total Maximum Single Mode and Multimode Fiber Optic CablingSingle Mode and Multimode Fiber Optic Cabling Max. Lobe Length Max. Drive Distance Type Mbps