3Com 10/100BASE-T4 PCI manual 10BASE-T Operation, 10BASE-T Specifications

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10BASE-T Operation

A-3

10BASE-T Operation

10BASE-T is the Institute of Electrical and Electronics Engineers (IEEE) 802.3 standard for Ethernet signaling over unshielded twisted-pair wire at 10 Mbps.

Ethernet, as the most widely-used network protocol, uses 10BASE-T as its primary cabling scheme. Ethernet’s characteristics include:

A data rate of 10 Mbps

A maximum station separation of 2.8 kilometers (1.7 miles) using fiber

A broadcast architecture

A specific media-access control (MAC) scheme

The specified networking technology for Ethernet is its MAC protocol called Carrier Sense Multiple Access with Collision Detection (CSMA/CD). Ethernet uses CSMA/CD to prevent network failures or collisions when two devices try to access the network at the same time.

10BASE-T Specifications

The 10BASE-T name indicates a signaling speed of 10 Mbps and twisted-pair wiring. Base stands for baseband, which denotes a technique for transmitting signals as direct-current pulses rather than being modulated onto separate carrier frequencies. This is a feature of the Ethernet architecture.

A wiring topology using 10BASE-T specifies a wiring hub, cable arranged in a star configuration, and unshielded twisted-pair cable. Each node has a separate cable run that must not exceed 328 feet (100 meters) from the node to the hub.

The 10BASE-T four-repeater (hub) rule states that you can use no more than four repeaters between major LAN segments. If you add a fifth repeater, the timing of the packets can be impaired and the CSMA/CD media-sharing scheme may break down.

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Contents User Guide Fast Etherlink Parallel TaskingNetwork Adapter Adapters3Com Corporation 5400 Bayfront Plaza Santa Clara, California Lifetime Warranty Asia Contents Configuring Software Settings Cispr B Compliance Figures Tables About this Guide How to Use This GuideIntroduction Conventions Print Autolink.logAdapter automatically senses and switches to either Introduction10/100BASE-T4 PCI Adapter Adapter Features PCI Technology Inspecting the Adapter Installing the Adapter3C59X EtherDisk diskette version 5.1 or above Installing the Boot Prom Installing the AdapterConnecting to the Network PCI Computer with PCI and Eisa SlotsRJ-45 connector Connecting to the Network Loading the Network Summary of Driver Loading ProceduresDrivers Using the EtherDisk Diskette Accessing DOSUsing Windows Name of the installed 3Com adapter appears, as follows Confirming Adapter Installation for WindowsSystem Properties box appears, detailing your system setup This confirms the adapter’s installationOne Adapter in a Client Using NetWare ODIAutoLink Requirements At the prompt, type AutoLink InstallationAlternatively, at the prompt, type ESC=Cancel Read the screen and press EnterMultiple Adapters in a Client FEA0 Select Configuration and Diagnostic Program and press Enter Main menu appearsLoading Ndis Drivers One or More Adapters in a ServerAuto Select Media Type Updating Ndis DriversFollow the instructions displayed in the subsequent screens Transcend PC Link SmartAgent Driver Agents Desktop Management InterfacePerforming Troubleshooting Diagnostic Tests Troubleshooting with the Diagnostic TestsTypes of Tests After performing the diagnostic tests, reboot your computerBefore Running the Tests Fast EtherLink 10/100BASE-T4 PCI adapterStarting the Diagnostic Program Running the Group 1 TestsRunning the Group 3 Test Setting Up an Echo Server 3C59XCFG Getting Help If a Test Fails To print the file, type Miscellaneous Checks Changing the Test SetupTo change the test parameters, follow these steps LEDs LEDCabling Pin assignments for the RJ-45 connectorWhen properly connected to a 10BASE-T network, Adapter Cabling RequirementsTwisted-Pair Cable 10BASE-T Operation 10BASE-T Specifications100BASE-TX Operation 100BASE-T Standard100BASE-TX designates the Ieee 802.3 specification for 100BASE-T4 Operation 100BASE-FX OperationRJ-45 Connector Pin Assignments Figure A-1 shows the RJ-45 connector pin assignmentsSettings To change the software option settings, follow these steps Changing Software SettingsType at the prompt Select Adapter Installed Adapters Continue this procedure with any of the other options Press Tab to highlight OK. Press Enter\CONFIG\3C595.SET Specifications Adapter Specifications3Com Bulletin Board Service On-line Technical ServicesTechnical Support To use 3ComForum Log on to CompuServe World Wide Web Site3ComForum on CompuServe Press Return to see the 3ComForum main menuSupport from Your Network Supplier 3ComFacts Automated Fax ServiceLocal numbers are available within the following countries Details about recent configuration changes, if applicable Returning Products for RepairTo obtain an RMA number, call or fax Glossary 100BASE-TAuto Select Media Type BusEIA/TIA EMM386MAC STP Index NumericsDOS Ndis Network Driver Optimization option setting B-2 Windows 3.X 3-3 Windows Limited Warranty 3Com Corporation Bayfront Plaza Interference Handbook CE Notice