Cabletron Systems E1100, E2100, E3100 manual Twisted Pair Requirements

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MAKING NETWORK CONNECTIONS

•Check the cable for continuity, and ensure that the cable is actually a twisted pair cable.

•Check that the adapter is properly seated in the expansion slot.

•Check that the twisted pair connection meets dB loss and cable specifications outlined in Section 3.1.2, below.

If a link still has not been established, contact Cabletron Systems Technical Support (see Section 2.12, Getting Help).

3.1.2 Twisted Pair Requirements

•Length - 10BASE-T transceivers must be able to transmit over a 100 meter link (328 feet) using 24 AWG unshielded twisted pair wire. 10BASE-T specifies no maximum link length.

NOTE: Due to cable delay, the maximum link length is always limited to about 200 meters (656 feet), regardless of the cable type.

Generally, links up to 150 meters (492 feet) long are achievable for unshielded and shielded twisted pair cable. For each connector or patch panel, subtract 12 meters (39.4 feet). This allows links of up to 126 meters (413.4 feet) using standard 24 AWG UTP wire and two patch panels. Higher quality, low attenuation cables may be required when using links greater than 126 meters.

•Insertion Loss - 11.5 dB maximum for a 10BASE-T link at all frequencies between 5.0 and 10.0 MHz. This includes attenuation of cables, connectors, patch panels, and reflection losses due to impedance mismatches.

•Impedance - Unshielded twisted pair cable is typically between 85 to 110 ohms. Shielded cable, such as Type 1 cable, is typically 150 ohms which can increase the signal reflection. Cabletron Systems 10BASE-T Twisted Pair products will work on shielded twisted pair cable with 75 to 165 ohms impedance.

•Jitter - Not more than 5.0 nsec for a 10BASE-T link.

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Contents Desktop Network Interface Products Page FCC Notice Contents Appendix a ADDRESS/INTERRUPT Tables Index Making Network ConnectionsChapter Introduction Using this Manual3 10BASE-T Twisted Pair Port Adapter FeaturesConnectivity Thin Ethernet PortJabber Protection Fiber Optic PortsLanview LEDs Collision Present CLN Statistics SoftwareRelated Manuals Adapter Models Chapter InstallationE1100/E2100 Series Adapters Model Number ReferencesUnpacking the Adapter Preparing the E1100 for InstallationCopying the Software E1112 Adapter Preparing the E2100 for InstallationJP1, E1100/E2100 I/O base address Jumper Pins 220 280 300 Setting the I/O Base Address JumperI/O Address Space Requirements Installing a Boot PromInstalling the E1100/E2100 Adapters Backplate Detail Installing the E1100 Series Adapter Preparing the E3100 Series for Installation Installing the E3100 Series Adapters2 E3100 Series Boot Prom E3112 Adapter Installing the E3100 AdapterBackplate Thumbscrew Clip Adapter Edge Connector Expansion Slot Loading Network Software Copying the ADF FileSoftware Check List Troubleshooting Check List for AdaptersGetting Help Support@ctron.com Dimensions SpecificationsPower Requirements SafetyAttaching a UTP Segment Chapter Making Network ConnectionsTX+ Twisted Pair Requirements BNC Interface Coax Port Connecting to a THIN-NET SegmentThin-Net Requirements Attaching a Thin-Net SegmentConnecting to a Fiber Optic Link Segment Fiber Optic Requirements ST Fiber Optic ConnectorsFiber Optic Interface Fiber Optic Ports Wire Fault/Attachment LED AUI Port AUI Connector Screws AUI Cable Requirements AUI InterfaceTable A-1. I/O Ports of Common Devices Appendix a ADDRESS/INTERRUPT TablesA-2 Index Index
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