Cabletron Systems STHI manual Single Mode and Multimode Fiber Optic Cabling, Total Maximum

Page 77

Single Mode and Multimode Fiber Optic Cabling

Table B-4. STP Maximum Lengths

IBM

Max. Lobe Length

Max. Drive Distance

 

 

 

 

Type

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

 

Cable Type

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

 

 

 

 

 

 

 

 

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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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 TroubleshootingAppendix a Tpim Specifications Appendix B Media Specifications Sthi Overview Contents of This ManualLanview LEDs Sthi OverviewTCU Ports Lobe Port and Multiple Ring Out Port ConfigurationsRing Speed Fault Protection Media Type Connector Daughter Board Upgrade KitActive Circuitry 3 RI & RO PortsSupport for Passive MAU Workgroups Automatic Beacon Recovery ProcessHub-By-Hub Bypass Control IP Address Discovery Improved Protection from BeaconingFlash Downloads DAISY-CHAIN MAU Configuration Getting Help Related ManualsRelated Manuals Local ManagementGetting Help Maximum Number of Stations on a Ring General Networking ConsiderationsInstallation Recommendations TemperatureGeneral Networking Considerations CrosstalkOperating Specifications Operating SpecificationsHubstack Interconnect Cables TCU and COM PortsRJ45 to DB25 Connector Pinout Standard MIBs Supported MIB GroupsCabletron Enterprise MIBs Ring SpeedRing Sequence SafetyEnvironmental Requirements Physical SpecificationsComputing Hardware Unpacking the Sthi Installing the SthiStacking the Sthi Installing the SthiAttaching the Strain Relief Bracket Rack-Mounting the SthiRack Mounting Brackets Wall-Mounting the SthiInstalling the Sthi Wall-mounting the Sthi Free-Standing InstallationsFinishing the Installation Tpim InstallationTpim Installation Connecting the Sthi to the Power SourceColor Condition Lanview LED SignalsTrouble Resolution Trouble ResolutionLoss Of Power Failure to Link on Enabled PortReset Button Reset ButtonReset Button Management FailureNvram Reset Switch Nvram Reset SwitchLocal Management Accessing LMMenu Parameter Setting Accessing LMDumb Terminal Configuration Entering LM Console Cable ConfigurationUsing LM Screens Using LM ScreensInvoking Menu Options or Screen Commands Working with LM ScreensExiting the Local Management Interface Session Setting or Modifying FieldsScreen Hierarchy Password Screen Main Menu Device Setup StatusScreen Introductions System LevelChassis Status View Snmp TrapsComponent Status Device StatisticsSystem Level Screen System Level ScreenSystem Date and System Time IP AddressRetry Interval Enable IP Address DiscoverySubnet Mask Number of Retries Enable Beacon RecoverySnmp Community Names Screen Locally Administered AddressSnmp Community Names Screen MAC AddressCommunity Name Access PolicyRead-only Read-writeSnmp Traps Screen Enable TrapsSnmp Traps Screen Trap DestinationChassis Status View Screen Screen Mode Screen CommandChassis Status View Screen Functions of the 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 ModeNext and Previous Component Status ScreenComponent Status Screen Device Statistics Screen Device Statistics ScreenAccumulate Screen ModeFrames Received Errors ReceivedKBytes Received Beacon StatesRing Status Ports EnabledRing Number Stations on a RingLine Errors Isolating Errors Fields GroupBurst Errors AC ErrorsNon-Isolating Errors Group Internal ErrorsLost Frame Errors Frame Copied ErrorsFrequency Errors Token ErrorsSnmp Tool Screen Snmp Tool Screen3 GET OID PrependStep Getnext9 SET WalkCycles Firmware Image Downloads RepeatCtDLCommitRAMtoFlash Twisted Pair Tpim Pinouts OverviewFiber Optic Tpim Specifications Fiber Optic Tpim SpecificationsBudget TPIM-F2 for Multimode FiberParameter Typical Worst Case Parameter Typical Minimum Maximum TPIM-F3 for Single Mode FiberA-5 UTP Cable Categories Unshielded Twisted Pair UTPUnshielded Twisted Pair UTP Operating Electrical SignalAttenuation Loss Cat Frequency Per 100m @ ≥100mShielded Twisted Pair STP Shielded Twisted Pair STP@ 4 Mbps @ 16 Mbps CategoryType Frequency 1000 m 1000 ft Operational Attenuation perSTP Lobe Lengths Mixed STP Cable TypesSingle Mode and Multimode Fiber Optic Cabling Single Mode and Multimode Fiber Optic CablingMax. Lobe Length Max. Drive Distance Type Mbps Total Maximum
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