Page 2 - Federal Communications
Page ii Federal Communications Commission Notice This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operat...
Page 3 - VDE CL ASS B COMPLIANCE
Page iii VDE CL ASS B COMPLIANCE Hiermit wird bescheinigt, dass der (5101T-FB) in Uebereinstim-mung mit den Bestimmungen der Vfg 243/1991 funk-entstort ist.Der Deutschen Bundespost wurde das Inverkehrbringen dieses Gerates engezeigt und die Berechtigung zur Ueberprufung der Serie auf Einhaltung der ...
Page 4 - COPYRIGHT STATEMENT
Page iv COPYRIGHT STATEMENT ø1996 by 3Com Corporation. All rights reserved. The information contained herein is the exclusive and confidential proper ty of 3Com Corporation. No part of this manual may be disclosed or reproduced in whole or in par t without permission from 3Com Corporation.Printed in...
Page 5 - Table of Contents
Page v Table of Contents Table of Contents ................................................. vPreface .................................................................. 1 Intended Audience ....................................... 1 Transceiver Overview .......................................... 3 Tra...
Page 9 - Preface; Intended Audience
Page 1 Preface This guide describes the features, DIP switch, installation steps, operation verification, andproblem diagnosis for the 3Com 10BASE-FB Transceiver. Intended Audience This guide is intended for use by installers, users, and network managers. It does not include detailed service informa...
Page 11 - Transceiver Overview; Transceiver Top Panel
Page 3 Transceiver Overview This section provides descriptions of the AUIconnector, fiber optic ports, indicators, and DIP switch on the transceiver front, rear, and top panel (respectively). 3Com recommends that you become familiar with these features prior to installation. Note: Do not under any c...
Page 12 - Figure 1. Transceiver Top Panel
Figure 1 illustrates the top panel of the 3Com 10BASE-FB Transceiver. Table 1 provides a description of the DIP switches. Figure 1. Transceiver Top Panel
Page 13 - Table 1. Transceiver DIP Switch Set tings
Page 5 Table 1. Transceiver DIP Switch Set tings Switch Setting Description 1 Alternate Collision Enables or disables Alternate collision Presence Signaling mode. 2 SQE Test Enables or disables SQE Test. 3 High Power Enables High Power. Disable setting invokes Normal Power. 4 Half Step Enables Half ...
Page 14 - Transceiver Front Panel; Figure 2. Transceiver Front Panel
Page 6 Transceiver Front Panel The Transceiver front panel contains the 15-pin AUI (Attachment Unit Interface) connector. The AUI 15-pin D subminiature male connectorconforms to IEEE 802.3 and Ethernet Version 2.0 requirements. The shell of the connector is not insulated from the transceiver case, t...
Page 15 - Transceiver Rear Panel
Page 7 Transceiver Rear Panel The Transceiver rear panel contains the Fiber Optic (SMA, ST, or FC) connectors and four indi-cators (LEDs). The LEDs provide status for: ■ Fiber link (transmit and receive) ■ SQE Test ■ Por ts The LEDs can be On, Of f, or Blinking. The num-ber of consecutive blinks bef...
Page 16 - Figure 3. Transceiver Rear Panel
Page 8 Figure 3 shows the rear panel on the 10BASE-FB Transceiver. Table 2 provides a description of the LEDs. Figure 3. Transceiver Rear Panel
Page 17 - Alternate Collision Mode; Table 2. Transceiver LED Descriptions
Page 9 Alternate Collision Mode When enabled, the timing and duration of the collision presence signal (CI) at the AUI is altered to facilitate operation with certain controller chips. The default setting is enabled. Whendisabled, collisions are signaled to the AUI for as long as they last on the me...
Page 19 - Half Step Mode; Installation
Page 11 Half Step Mode When enabled, half step is signaled at thebeginning of packets, as required in IEEE 802.3 and Ethernet Version 2.0. The default set ting is enabled. When disabled, the signaling on the AUI receive pair (DI) is the same as defined in EthernetVersion 1.0. This is a full step wav...
Page 21 - Unpacking Procedures
Page 13 Unpacking Procedures To unpack the transceiver: 1. Remove the unit from the shipping car ton. 2. Inspect the unit closely for damage. If the unit appears to be damaged, return it to the shipping car ton and contact your local supplier. 3. Verify that the transceiver is the correct model by m...
Page 27 - Connecting Fiber Cables
Page 19 * Functional differences exist whereby Ethernet V2.0 repeaters are notsuppor ted by the 10BASE-FBTransceiver. If you are in doubt about the type of your repeater, contact your 3Com supplier for more information. Connecting Fiber Cables To connect fiber cables to the transceiver: 1. Remove th...
Page 28 - Connecting the AUI Cable
Page 20 4. Connect the remote end of the fiber optic cables to the 10BASE-FB Star Coupler, ONline Ethernet 10BASE-FB Module, or ONcore Ethernet 10BASE-FB Module ports. Ensure the transmit fiber at one end connects to a receive port at the other end. Connecting the AUI Cable Apply power to the transc...
Page 29 - Verif ying Physical Link Operation
Page 21 There are differences between IEEE 802.3 and Ethernet Version 2.0 AUI cables. While the 10BASE-FB Transceiver is compatible with both, ensure that the AUI cable being used is appropri-ate for the device being connected. Refer to the section, AUI Cables and Pinouts, later in this manual for c...
Page 30 - Troubleshooting; Status LED
Page 22 If after completing Steps 1 and 2 you find blink-ing Status indicators on connected and enabled modules or devices, refer to the Troubleshooting section in this manual. Troubleshooting This section explains how to use the diagnostic features of the 10BASE-FB Transceiver for fault isolation. ...
Page 35 - Troubleshooting Link Problems
Page 27 Troubleshooting Link Problems Each full duplex fiber link is monitored at both ends. The 10BASE-FB Star Coupler and the 3Com Ethernet 10BASE-FB Modules contain statusindicators (one for each por t). The Transceiver contains a single status indicator. In addition to signifying link problems, ...
Page 36 - Excessive Collisions
Page 28 All link problems cause the link to be inoperable. If a link problem is indicated, check the indicators at both sides of the link, and then consultTable 6. Troubleshooting System Problems This section addresses some of the systemproblems that can be corrected using the options on the 10BASE-...
Page 37 - Late Collisions and Failure to Defer
Page 29 If you have IEEE 802.3 repeaters in your network, ensure that the SQE Mode and Alternate Colli-sion Mode switches are disabled for 10BASE-FB Transceivers connected to these repeaters. Late Collisions and Failure to Defer Late collisions can be caused by exceeding the distance rules of Ethern...
Page 38 - Miscellaneous Errors
Page 30 Also, ensure that you have accounted for thedistance reduction caused by external baseband repeaters that were added and by basebandsegments connected to those repeaters. Miscellaneous Errors Many types of physical layer errors can occur if the controller AUI interface is Ethernet Version 1....
Page 39 - Transceiver Cables; Signal Dif ferences
Page 31 Transceiver Cables This section explains the signal dif ferences among the various types of AUI transceiver cables. It also explains wire sizes and the proper pinouts for Ethernet Version 2.0 and IEEE 802.3 AUI cables. Signal Dif ferences Signal differences occur between different types of t...
Page 41 - Wire Sizes
Page 33 Shielding of individual signal or power pairs is not required because most V1.0 controllers and transceivers are DC-coupled. The overall AUI cable shield provides for shielding and grounding and is connected to pin 1 and the AUI connector shell. In practice, most Ethernet V1.0 equipment uses...
Page 42 - Table 7. Transceiver Cable Wire Sizes
Page 34 * More flexible, but is limited to 5.0 meters in length. Signal deterioration along the signal pairs is most likely to happen as the AUI cable reaches the maximum length of 50 meters. Signal deteriora-tion is due to the filtering action of the cable. IEEE 802.3 AUI cables are designed to red...
Page 43 - Cable Pinouts; Table 8. AUI Cable Pinout Char t
Page 35 Because 802.3 AUI cables provide a ground shield isolated from the signal and power pair shields, the cables provide additional noise immunity in noisy operating environments. Cable Pinouts Table 8 shows the proper pinouts for Ethernet Version 2.0 and IEEE 802.3 AUI cables. Table 8. AUI Cabl...
Page 46 - Causes of Fault Transceiver Cables
Page 38 Causes of Fault Transceiver Cables The following list describes causes of faulty trans-ceiver cables: ■ Improper Grounding (pin 1 vs. pin 4). ■ Bad ground: ■ Shell connector not crimped onto AUI cable braid. ■ Ribbon cables in computers not shielded or improperly mounted. ■ Broken pair wires...
Page 47 - Cable Recommendations; Specifications
Page 39 Cable Recommendations The 10BASE-FB Transceiver is fully compatible with IEEE 802.3 and Ethernet V2.0. The use of Ethernet V1.0 AUI cables and controllers is not recommended. The 10BASE-FB Transceiver accepts either 802.3 or V2.0 AUI cables. Use the proper AUI cable for the appropriate contr...
Page 48 - General Specifications; Table 9. General Specifications
Page 40 ■ Attachment Unit Interface General Specifications Table 9. General Specifications Specification Value Dimensions 4.8" x 2.4" x 0.9" (122mm x 61mm x 23mm) Weight 4 oz. (115 g) Operating Temperature 32° to 10 4° F(0° to 40° C) Operating Humidity Less than 95%non-condensing Power 5...
Page 49 - Optical Inter face Specifications; Table 10. Optical Inter face Specifications
Page 41 Optical Inter face Specifications Table 10. Optical Inter face Specifications Specification Value Data Rate 10 Million bits per second Encoding Compliant with 10BASE-FB synchronous signaling standard Connectors SMA, ST, and FC Connectors spacing 0.8 inch Transmit Source Type GaAlAs LED Trans...
Page 50 - Table 11. Transmit Power
Page 42 Transmit Power Specifications Fiber Optic Cables Compatibility Table 11. Transmit Power Cable Size (micron) Normal Power (dBm Peak) High Power (dBm Peak) 50/125 NA 0.20 -21.3 ± 2.5 -13.8 ± 1.5 62.5/125 NA 0.275 -17.5 ± 2.5 -10.5 ± 1.5 100/140 NA 0.30 -12.0 ± 2.5 -5.0 ± 1.5 Table 12. Fiber Op...
Page 51 - Table 13. AUI Specifications
Page 43 At tachment Unit Inter face Specifications Table 13. AUI Specifications Specification Value Connector Standard male 15-pinD-subminiature Standards conformance IEEE 802.3, Ethernet V2.0 DC Power requirements 12-15 Volts ± 10% applied at AUI (pins 13, 6) DC line current consumption 200 mA min ...
