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Cabletron Systems STHI manual B.3 Single Mode and Multimode Fiber Optic Cabling

Models: STHI

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Single Mode and Multimode Fiber Optic Cabling

Single Mode and Multimode Fiber Optic Cabling

Table B-4. STP Maximum Lengths

IBM	Max. Lobe Length		Max. Drive Distance
IBM
Type	4 Mbps	16 Mbps	4 Mbps	16 Mbps
	4 Mbps	16 Mbps	4 Mbps	16 Mbps


1 & 2	200 meters	100 meters	770 meters	346 meters
	(660 feet)	(300 feet)	(2525 feet)	(1138 feet)

6 & 9	30 meters	30 meters	513 meters	230 meters
	(99 feet)	(99 feet)	(1683 feet)	(755 feet)

B.3 Single Mode and Multimode Fiber Optic Cabling

TPIM models F2 and F3 support multimode and singlemode fiber optic cable respectively. Table B-5 below defines total signal attenuation tolerances for fiber cabling. Both media have a typical constant attenuation rate per km of fiber cable and each connector on the cable system contributes significant additional attenuation. Maximum drive distances define maximum allowable cable length.

Table B-5. Signal Tolerances for Fiber Optic Cable

		Total	Maximum
		Allowable	Maximum
	Cable Type	Allowable	Drive Distance
	Cable Type	Attenuation	Drive Distance
		Attenuation

Multimode	50/125 ∝m	13.0 dB or less	2 km (2187.2 yards)

	62.5/125 ∝m	16.0 dB or less
	62.5/125 ∝m	16.0 dB or less

	100/140 ∝m	19.0 dB or less

	Typical Signal Attenuation Rate: ≤ 2.5 dB/km.

Single	8/125-12/125 ∝m	10.0 dB or less	10 km (10936.0 yards).

	Typical Signal Attenuation Rate: ≤ 0.5 dB/km.

NOTE

The attenuation values shown in Table B-5 include the attenuation attributable to cables, connectors, patch panels, and reflection losses due to impedance mismatches in the segment.

Page B-5

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Cabletron Systems STHI manual B.3 Single Mode and Multimode Fiber Optic Cabling

Contents

CABLETRON SYSTEMS, P. O. Box 5005 Rochester, NH STHI INTELLIGENT TOKEN RING STACKABLE HUB USER’S GUIDECopyright May, 1995 by Cabletron Systems, Inc DOC NOTICE FCC NOTICECABLETRON SYSTEMS, INC PROGRAM LICENSE AGREEMENTAND DISCLAIMER OF LIABILITY EXCLUSION OF WARRANTYCABLETRON SOFTWARE PROGRAM LICENSE RESTRICTED RIGHTS UNITED STATES GOVERNMENT2.1 General Networking Considerations 2.2 Operating Specifications CHAPTER 5 Local Management CHAPTER 4 TroubleshootingAppendix A TPIM Specifications Appendix B Media Specifications Introduction 1.1 Contents of This ManualCHAPTER 1.2 STHI Overview1.2.1 LANVIEW LEDs STHI OverviewRing Speed Fault Protection Lobe Port and Multiple Ring Out Port ConfigurationsSTHI Overview 1.2.2 TCU PortsConnector Daughter Board Upgrade KitSTHI Overview Active CircuitrySTHI Overview 1.2.5 Automatic Beacon Recovery Process1.2.4 Hub-By-Hub Bypass Control 1.2.6 Support for Passive MAU WorkgroupsImproved Protection from Beaconing STHI Overview1.2.7 Flash Downloads 1.2.8 IP Address DiscoveryRING OUT TCU MAU CONFIGURATION DAISY-CHAIN MAU CONFIGURATIONAccess Units Multi-Station1.4 Getting Help 1.3 Related ManualsRelated Manuals 1.2.9 Local ManagementPassword your email address Login anonymousPostal Service Getting Help2.1 General Networking Considerations Requirements & SpeciﬁcationsCHAPTER Maximum Number of Stations on a RingInstallation Recommendations TemperatureGeneral Networking Considerations CrosstalkOperating Specifications 2.2 Operating Specifications2.2.1 Hubstack Interconnect Cables 2.2.2 TCU and COM PortsFigure 2-2. RJ45 to DB25 Connector Pinout Operating Specifications2.2.3 Supported MIB Groups Operating SpecificationsStandard MIBs Cabletron Enterprise MIBs2.2.6 Safety Operating Specifications2.2.5 Ring Sequence Hubs that are bypassed from the stack’s common ring must2.2.9 Physical Specifications Operating Specifications2.2.7 Computing Hardware 2.2.8 Environmental Requirements3.1 Installing the STHI InstallationCHAPTER The package includes a 3-1/2” floppy disk containing a3.1.2 Stacking the STHI Installing the STHI3.1.3 Attaching the Strain Relief Bracket 3.1.4 Rack-Mounting the STHI3.1.5 Wall-Mounting the STHI Installing the STHIin the wall Installing the STHIFigure 3-4. Installing the Wall-Mounting Brackets 3.1.6 Free-Standing Installations Installing the STHI3.3 Finishing the Installation 3.2 TPIM InstallationTPIM Installation 3.1.7 Connecting the STHI to the Power SourceCHAPTER Troubleshooting4.1 LANVIEW LED Signals Trouble Resolution 4.2 Trouble ResolutionLoss Of Power Failure to Link on Enabled PortThe Reset Button 4.3 The Reset ButtonManagement services will be suspended during the reset process STHI-24NVRAM Reset Switch 4.4 NVRAM Reset SwitchCHAPTER 5.1 Accessing LMLocal Management 5.1.1 Dumb Terminal Configuration Accessing LMSetting Menu5.1.3 Entering LM Accessing LM5.1.2 Console Cable Configuration Using LM Screens 5.2 Using LM ScreensInvoking Menu Options or Screen Commands 5.2.1 Working with LM ScreensSetting or Modifying Fields Using LM Screens1. Use the Tab key or arrow keys to highlight fields Exiting the Local Management Interface Session5.2.2 Screen Hierarchy Using LM Screens5.2.3 Screen Introductions System LevelSNMP Traps Using LM ScreensChassis Status View Component StatusOnly a user with Super-User access can change the device’s 5.3 The System Level ScreenThe System Level Screen 5.3.1 System Date and System TimeThe System Level Screen 5.3.4 Enable IP Address Discovery5.3.3 Subnet Mask Retry IntervalNumber of Retries 5.3.5 Enable Beacon RecoveryThe System Level Screen 5.3.7 Locally Administered Address 5.4 The SNMP Community Names ScreenThe SNMP Community Names Screen Retry IntervalThe SNMP Community Names Screen 5.4.2 Access Policy5.4.1 Community Name Read-onlyFigure 5-6. SNMP Traps Screen 5.5 The SNMP Traps ScreenThe SNMP Traps Screen 5.6.1 The Screen Mode Screen Command 5.6 The Chassis Status View ScreenThe Chassis Status View Screen Functions of the Chassis Status View ScreenThe Chassis Status View Screen 5.6.2 Multiplexer Configuration FieldsThe Chassis Status View Screen 5.6.3 Port Configuration FieldsADMINISTRATIVE Mode The Chassis Status View Screen ADMINISTRATIVEEach port field whether TPIM or TCU may be set as follows NEXTThe Chassis Status View Screen RING OUT ENABLE ModeFigure 5-9. Chassis Status View Screen in RING OUT ENABLE Mode The Chassis Status View Screen OPERATIONAL ModeEach Ring port TPIM port or Ring Out TCU may be listed as Each station TCU port may be listed as5.6.5 ENABLE ALL PORTS 5.7 The Component Status ScreenThe Component Status Screen 5.6.4 NEXT and PREVIOUSThe Device Statistics Screen 5.8 The Device Statistics ScreenThe Device Statistics Screen 5.8.1 Screen ModeTOTAL DELTAThe Device Statistics Screen Errors ReceivedFrames Received KBytes ReceivedThe Device Statistics Screen Ports EnabledRing Status Ring NumberBurst Errors Line ErrorsAC Errors Abort Transmit ErrorsLost Frame Errors Internal ErrorsFrame Copied Errors Rcvr Congestion ErrorsToken Errors 5.9 The SNMP Tool ScreenFrequency Errors The SNMP Tool Screen5.9.1 Community Name The SNMP Tool Screen5.9.2 OID Prepend 5.9.3 GET5.9.5 STEP The SNMP Tool Screen5.9.4 GETNEXT 5.9.6 WALK The SNMP Tool Screen5.9.7 CYCLES 5.9.8 RECALL-OIDThe SNMP Tool Screen ctDLForceOnBoot5.9.10 REPEAT 5.9.11 Firmware Image DownloadsThe SNMP Tool Screen ctDLInitiateColdBootctDLCommitRAMtoFlash ctDLTFTPRequestAPPENDIX A TPIM SpeciﬁcationsA.1 Overview A.2 Twisted Pair TPIM PinoutsFiber Optic TPIM Specifications A.3 Fiber Optic TPIM SpecificationsA.3.1 TPIM-F2 for Multimode Fiber Fiber Optic TPIM SpecificationsParameter Fiber Optic TPIM SpecificationsTypical MinimumParameter Fiber Optic TPIM SpecificationsTypical MinimumB.1 Unshielded Twisted Pair UTP Media SpeciﬁcationsAPPENDIX B Operating Unshielded Twisted Pair UTPB.2.1 STP Cable Categories B.2 Shielded Twisted Pair STPShielded Twisted Pair STP B.2.3 Mixed STP Cable Types Shielded Twisted Pair STPB.2.2 STP Lobe Lengths Single Mode and Multimode Fiber Optic Cabling B.3 Single Mode and Multimode Fiber Optic Cabling