Cabletron Systems MICROMMAC-22T, 42T manual Type 3 Media Filters, UTP Maximum Lobe Lengths

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REQUIREMENTS/SPECIFICATIONS

Maximum Lobe Lengths

Lobe length is the physical length of the cable connecting a station to its TCU port at the MicroMMAC-T. Table 2-2 lists the maximum lobe cable length for ring speeds of 4 and 16 Mbps. The values listed refer to total lengths made up of UTP cable only.

Table 2-2. UTP Maximum Lobe Lengths

UTP Cable Type	Maximum Lobe Length
	4 Mbps	16 Mbps


Category 3	200 meters	100 meters
	(656 feet)	(328 feet)

Category 4	200 meters	100 meters
	(656 feet)	(328 feet)

Category 5	250 meters	120 meters
	(820 feet)	(394 feet)

Type 3 Media Filters

A Type 3 Media Filter is required when connecting a UTP lobe segment from a MicroMMAC-22T or MicroMMAC-24T to a station supporting STP cabling. Cabletron Systems offers the following Type 3 Media Filters:

•TRMF, RJ45 (UTP) connector to 10-inch DB9 (STP) cable with

LANVIEW

•TRMF-2, RJ45 (UTP) connector to DB9 (STP) connector

Maximum Number of Stations

When UTP lobe cabling is used in any ring segment, the number of ring stations supported by the MicroMMAC-T is limited to 150, regardless of the operating ring speed.

2-3

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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 RFC 1271/1513 Support Rmon MIB 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 RequirementsService SafetyPhysical 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 Connecting to a Power Source Free-Standing InstallationResetting the MICROMMAC-T To reset the MicroMMAC-T Setting the Ring SpeedTo 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 ExampleSignal RJ45 DB9 Ring-In Ring-Out Installing Tpim ModulesPinout 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 FollowingAttaching the Management Terminal Management Terminal Setup ParametersTo attach a management terminal to the MicroMMAC-T Terminal Settings for LM Terminal Modem Cable Conﬁguration and SetupMenu 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 ScreenWorking with Local Management Screens Setting or Modifying Local Management Screen FieldsSelecting 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 MaskTo set the Default Gateway Setting 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 Station Address Security ModeStn Edit Previousscreen SAVE/EXECUTENextscreen ReturnAdding Stations to the Station Address Allowed List Viewing the Revised Allowed ListDeleting Stations from the Station Address Allowed List Device Statistics Screen Device StatisticsUsing the Accumulative Counter Mode Selecting the Device Statistics 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 get help on speciﬁc commands To access a list of MIB commandsTo escape from the MIB Navigator screen MIB Commands Navigational 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