Cabletron Systems MICROMMAC-22T, 42T manual Setting the Nvram Switch

Page 42

INSTALLATION

MicroMMAC-24T		TOKEN RING HUB WITH LANVIEW®
MicroMMAC-24T		SUPPORTING 100 OHM STP CABLE
4 Mb	16 Mb
	SPEED
4 Mb	16 Mb	Ring Speed LED Indicator
4 Mb	16 Mb	On = 16 Mbps
SPEED		Off = 4 Mbps
SPEED

Figure 3-7. The Ring Speed Switch

3.7 SETTING THE NVRAM SWITCH

Figure 3-8 shows the location of the NVRAM Reset Switch. It can be reached by a inserting a small screwdriver through the side vent. NVRAM (Non-Volatile Random Access Memory) stores user-entered parameters such as IP address and device name.

MicroMMAC-24T

TOKEN RING		HUB
SUPPORTING 100			WITH
	OHM STP
			CABLELANVIEW®

NVRAM

RESET SWITCH

IN HERE

Figure 3-8. NVRAM Reset Switch Location

To restore MicroMMAC-T parameters to the factory defaults:

1.With power-ON, toggle the NVRAM switch from one position to the other.

3-7

Image 42

Contents Page Iii FCC Notice Cabletron SYSTEMS, INC. Program License Agreement United States Government Restricted Rights Contents Troubleshooting Local ManagementSaved System Messages Viewing Power UP Diagnostic Tests Contents Overview Chapter IntroductionMicroMMAC-T Overview MicroMMAC-T Features TelnetActive TCU Ports Cable Signal PolaritySpeed Fault Protection Local ManagementFlash Eeprom Ring Speed SwitchCabletron’s Distributed LAN Monitor Mode Lanview LEDsLCD and LCD Display Button Reset ButtonCOM Port Applications MIB SupportRmon MIB Support Rmon MIB RFC 1271/1513 SupportGroup Subgroup Section Stackable Capabilities BRIDGING/ROUTING Capabilities Typical Stackable ConﬁgurationTelnet Capabilities 1 SNA/WAN IntegrationRemote Management Capabilities BRIMsRecommended Reading Getting HelpCable Specifications MicroMMAC-T Ports/CablesUTP Voice Grade and Category 3 Speciﬁcations UTP Cable SpeciﬁcationsAttenuation and Impedance Frequency Impedance AttenuationMaximum Number of Stations Maximum Lobe LengthsType 3 Media Filters UTP Maximum Lobe LengthsSTP Cable Speciﬁcations STP Cable SpeciﬁcationsTypes Frequency Impedance Attenuation STP Cable Type Ring Speed Mbps Maximum Trunk LengthsSTP Maximum Lobe Lengths STP Maximum Drive DistanceMultimode Fiber Optic Cable Speciﬁcations Mixed Cable TypesAttenuation Cable Type Attenuation Maximum Drive DistanceSingle Mode Fiber Optic Cable Speciﬁcations Single Mode Fiber Optic Cable SpeciﬁcationsFiber Optic Budget Crosstalk Cable RECOMMENDATIONS/TROUBLESHOOTINGTemperature NoiseCOM Port Specifications COM 1/COM 2 PortsSlip Tpim SpecificationsUPS TPIM-T1TPIM-T2 TPIM-T1 PinoutsTPIM-F2 TPIM-T4 PinoutsParameter Typical Worst Case Value Budget TPIM-F3TPIM-F2 Speciﬁcations Parameter Typical Minimum MaximumREQUIREMENTS/SPECIFICATIONS Output Min. Load Max. Load Max Power General SpecificationsPower Supply Requirements Environmental RequirementsSafety ServicePhysical Unpacking the MicroMMAC-T Attaching the Strain Relief BracketInstalling the MicroMMAC-T Rack-Mounting the MicroMMAC-TInstalling of Rack-Mount Brackets Wall-Mounting the MicroMMAC-TWall-Mounting the MicroMMAC-T Free-Standing Installation Connecting to a Power SourceResetting the MICROMMAC-T Setting the Ring Speed To reset the MicroMMAC-TTo change the ring speed Setting the Nvram Switch To restore MicroMMAC-T parameters to the factory defaultsConnecting Lobe Port Cabling RJ45 Plug MIC ConnectorRJ45 Plug At TCU At device port10. UTP Conﬁguration Example To attach a lobe segment to a MicroMMAC-T network port 11. STP Conﬁguration ExampleInstalling Tpim Modules Signal RJ45 DB9 Ring-In Ring-OutPinout Cross-Reference for TPIMs Setting Phantom and RI/RO Switches Tpim Installation To install a TPIM, perform the following stepsConnecting STP Segments To connect a TPIM-T1 to a Twisted Pair SegmentConnecting Twisted Pair Segments To connect a segment to a TPIM-T2/-T4Connecting Fiber Optic Link Segments 16. The TPIM-T2/-T4To connect a ﬁber optic link segment to the TPIM-F2 /-F3 17. The TPIM-F2/-F3Checking the Installation To check MicroMMAC-T installationManagement Terminal Requirements Use Local Management to Do the FollowingManagement Terminal Setup Parameters Attaching the Management TerminalTo attach a management terminal to the MicroMMAC-T Modem Cable Conﬁguration and Setup Terminal Settings for LM TerminalMenu Function Selection Accessing Local Management To access Local ManagementAccessing Local Management via Telnet MicroMMAC-TLocal Management ScreenSetup Menu Screen Accessing Local Management from a ModemUsing Local Management Main Menu ScreenSetting or Modifying Local Management Screen Fields Working with Local Management ScreensSelecting a Menu Screen Option Exiting a Local Management Screen Exiting Your Local Management SessionSetting the System Date System Level ScreenSetting the System Time Setting the Host IP AddressModifying the Subnet Mask To modify the Subnet MaskSetting the Default Gateway To set the Default GatewaySetting Automatic Beacon Recovery Process Abrp Fields To set the Beacon Recovery ﬁeld To set the Number of Retries ﬁeld Setting COM 1 and COM 2 ApplicationsSnmp Community Names Screen To set the Retry Interval ﬁeldSnmp Community Names Screen Community Name Access PolicySnmp Traps Screen Editing the Community Name ﬁeldTrap Destination Enable TrapsSetting Snmp Traps Trap Community NameRing Security Screen Ring Security Screen Security Mode Station AddressStn Edit Previousscreen SAVE/EXECUTENextscreen ReturnViewing the Revised Allowed List Adding Stations to the Station Address Allowed ListDeleting Stations from the Station Address Allowed List Device Statistics Screen Device StatisticsSelecting the Device Statistics Counter Mode Using the Accumulative Counter ModeSetting the Refresh Field Errors Received Isolating ErrorsAC Errors Ring InformationNON-ISOLATING Errors Lost Frame ErrorsFrame Copied Errors Chassis Status View ScreenMode Next Using the Operational Mode Screen 10. Chassis Status View Operational ScreenTo display the status of ports Using the Administrative Mode Screen To enable and disable select portsTo bypass all ports on a module To enable all ports for all modulesUsing the Ring OUT Enable Mode Screen To reconnect a module to the token ringTo switch to and from STN and RO Component Status ScreenMIB Navigator Screen 13. Component Status View ScreenTo access a list of MIB commands To get help on speciﬁc commandsTo escape from the MIB Navigator screen Navigational commands MIB CommandsNavigation Built-In Special Built-In commands SetFlash Download Screen To download a Flash imageDownload Method ﬁeld To chose the Runtime methodTo choose the Bootprom method Toggle from Runtime to Bootprom using the spacebarUsing Lanview LEDs Lanview LedsUsing the LCD Display LCD DisplayStatic System Messages Static System MessagesDisplayed Message Signiﬁcance Alarm Messages Alarm MessagesDisplayed Signiﬁcance Messages Unsaved Failure or Error Messages Unsaved Initialization MessagesSaved System Messages Saved System MessagesNormal Unsaved Initialization Messages Displayed MessageViewing Power UP Diagnostic Tests Responding to Error MessagesTo execute a response option To return to Local ManagementPower Supply Cord