3Com 5108M-TP - Manual

ONline Ethernet 10BASE-T Module User’s Guide ix Tables Table 1-1. Interpretation of the 10BASE-T Module LEDs . . . . . . . . . . 1-4 Table 1-2. Dip Switch SW1 Settings and Interpretations . . . . . . . . . . 1-6 Table 1-3. Dip Switch SW3 Settings for Switches 1 and 4 . . . . . . . . . 1-7 Table 1-4....

ONline Ethernet 10BASE-T Module User’s Guide xi How to Use This Guide The ONline ™ Ethernet 10BASE-T Module User’s Guide describes the features, indicators, and installation procedures for the ONline Ethernet 10BASE-T Module. Information on troubleshooting and diagnostics is included for verifying o...

xii ONline Ethernet 10BASE-T Module User’s Guide Structure of This Guide This guide contains the following chapters: Chapter 1, Introduction – Introduces the principal features of the ONline Ethernet 10BASE-T Module and provides views and descriptions of the front panel and the dip switches on the m...

ONline Ethernet 10BASE-T Module User’s Guide xiii Document Conventions The following document conventions are used in this manual: Convention Indicates Example Courier text User input In the Agent Information Form, enter MIS in the New Contact field. System output After pressing the Apply button, th...

xiv ONline Ethernet 10BASE-T Module User’s Guide Related Documents This section provides information on suppo rting documentation, including: ❑ 3Com Documents ❑ Reference Documents Note: A Note . The information is important Note: Use STP lobe cables for your system. Caution: A Caution. A condition ...

ONline Ethernet 10BASE-T Module User’s Guide xv 3Com Documents The following documents provide additional information on 3Com products: 17-Slot ONline System Concentrator Installation and Operation Guide – Explains how to install, operate, and manage the 3Com ONline 17-Slot System Concentrator (Mode...

Introduction 1 - 1 1 Introduction This chapter describes the features, indicators, and dip switch settings on the ONline™ Ethernet 10BASE-T Module. The ONline Ethernet 10BASE-T Module The ONline™ Ethernet 10BASE-T Module is an eight-port IEEE 802.3 repeater module that complies with the 10BASE-T sta...

1 - 2 ONline Ethernet 10BASE-T Module User’s Guide twisted pair connections while ports 3, 4, 5, and 7 are shielded twisted pair connections. In addition to complying with the 10BASE-T standard, each port provides support for features that are beyond the scope of the 10BASE-T standard: ❑ supports sh...

1 - 4 ONline Ethernet 10BASE-T Module User’s Guide Dip Switches The 10BASE-T Module has three dip switches located on the module: ❑ 8-switch dip switch (SW1) ❑ 4-switch dip switch (SW3) ❑ 8-switch dip switch (SW6) Table 1-1. Interpretation of the 10BASE-T Module LEDs LED Name Color State Indicates A...

1 - 8 ONline Ethernet 10BASE-T Module User’s Guide The Off position sets the Squelch level to low. When the Squelch level is set to low, the ports are able to receive weaker signals. Note that Low Squelch mode does not conform to the 10BASE-T standard. If you change the module's Squelch level to low...

Introduction 1 - 9 10BASE-T Module is initially configured to channel 1. To reconfigure the module to a different channel, refer to the information in Table 1-4. If you have an ONline Ethernet Network Management Module installed in your concentrator, you can remotely override these switch settings. ...

1 - 10 ONline Ethernet 10BASE-T Module User’s Guide If you enable a port and disable Link Integrity, the Status LED is on for 10 seconds and blinks off for 400 msecs to indicate that Link Integrity is disabled. Table 1-5 lists the settings and functions for switches 1 through 8. If you have an ONlin...

Introduction 1 - 11 assigned. The channel check sequence repeats five times. Table 1-6 explains the channel check codes. The LED/Channel Check button and the Controller Module are explained in more detail in the ONline Controller Module Installation Guide . The ONline Ethernet Network Management Mod...

2 - 2 ONline Ethernet 10BASE-T Module User’s Guide Understanding the General Rules As part of your network design, it is important to consider your network size. For instance, is the network (end-to-end) 100 meters, 1000 meters, 4000 meters, or more? What are your plans for expansion? Your answers p...

Designing and Expanding the Network 2 - 3 Table 2-1 outlines the seven basic rules to keep in mind when you construct your network. Table 2-1. Seven Basic Network Rules Rule Definition Recommendations/Notes 1 If possible, use 10BASE-FB as the backbone medium. Use 62.5 micron cable to conform with th...

2 - 6 ONline Ethernet 10BASE-T Module User’s Guide LAN Equivalence LAN equivalence is the sum of both the incoming and outgoing module port signals. Different modules, however, have different equivalent distances. Table 2-2 lists the LAN product equivalent distances. Table 2-2. LAN Product Equivalen...

2 - 10 ONline Ethernet 10BASE-T Module User’s Guide For the configuration shown in Figure 2-1 to work, the fiber equivalent distance between transceiver A and transceiver B must be less than 4200 meters. As you can see in the calculation, there are still 1510 meters left for expansion in this config...

2 - 12 ONline Ethernet 10BASE-T Module User’s Guide While there is no fiber in this configuration, the fiber equivalent distance can be calculated as follows: Total link distance: 150 m + 100 m + 100 m + 50 m + 20 m = 420 m Total equivalent distance of 10BASE-T Modules: 4 * 420 m + 4 * 165 m = 2340 ...

2 - 14 ONline Ethernet 10BASE-T Module User’s Guide Patch Panels Patch panels weaken signals, thereby reducing achievable link distances. 3Com includes the use of one patch panel in the 150 meter link distance calculation. However, each additional patch panel in the link reduces the 150 meter link d...

Installing and Operating the Module 3 - 1 3 Installing and Operating the Module This chapter describes the precautionary, unpacking, and installation procedures for the Ethernet 10BASE-T Module. Precautionary Procedures Electrostatic discharge (ESD) can damage static-sensitive devices on circuit boa...

3 - 2 ONline Ethernet 10BASE-T Module User’s Guide Unpacking Procedures Use the following procedure when unpacking your 10BASE-T Module. 1. Verify that the 10BASE-T Module is the correct model by matching the model number listed on the side of the shipping carton to the model number you ordered (510...

Troubleshooting 4 - 1 4 Troubleshooting This chapter describes troubleshooting procedures for the ONline Ethernet 10BASE-T Module. Information on troubleshooting will assist you in verifying operation. Typical fault conditions are addressed in this chapter. Troubleshooting Diagnostic features are co...

4 - 2 ONline Ethernet 10BASE-T Module User’s Guide Troubleshooting With the Status LEDs A blinking Port Status indicator may be a sign that the port detects a potential problem. Once a port detects a problem, you can further analyze the problem by counting the number of blinks. Table 4-1 provides tr...

Troubleshooting 4 - 5 Troubleshooting With the Activity LEDs There may be situations where a port's Activity LED may not light. Use the troubleshooting suggestions in Table 4-2 to help isolate why this has occurred. Table 4-2. Troubleshooting With the Port Activity LEDs LED Name LED State Possible P...

4 - 6 ONline Ethernet 10BASE-T Module User’s Guide Technical Assistance You can receive assistance for installing and troubleshooting the 10BASE-T Module by calling either your 3Com reseller or 3Com Technical Support. Be prepared to supply a representative with the following information: ❑ Descripti...

Specifications A - 1 A Specifications ONline Ethernet 10BASE-T Module Specifications This appendix lists specifications for the 10BASE-T Module. There are five subsections: ❑ Electrical Specifications ❑ Environmental Specifications ❑ Mechanical Specifications ❑ General Specifications ❑ Twisted Pair ...

A - 2 ONline Ethernet 10BASE-T Module User’s Guide Environmental Specifications Operating Temperature: 0° to 50° C (32° to 122° F) Storage Temperature: -30° to 65° C (-22° to 149° F) Humidity: less than 95%, non-condensing BTU/hr: 30 Mechanical Specifications Dimensions: 1.0" W x 10.25" L x ...

Specifications A - 3 Cable propagation velocity: >.585c Host Interface: 3Com ONline System Concentrator bus interface standard Installation Attachment: Two thumbscrews on the mounting bracket Twisted Pair Connectors and Cables There are many types of cables and connectors that you can use to link...

A - 4 ONline Ethernet 10BASE-T Module User’s Guide Refer to Figure A-1 for an example of this connector and the cable pin-outs. Figure A-1. RJ45 Connector Pin-outs Some installations may have 50-pin Telco connectors at the wiring closet. We recommend using a patch panel that converts from 50-pin to ...

Specifications A - 5 Connecting Twisted Pair Cables We recommend that you connect cables first at the active concentrator location, and connect transceivers second. Refer to the ONline System Concentrator Installation and Operation Guide for more information about the ONline System Concentrator conn...

Technical Support B - 1 B Technical Support 3Com provides easy access to technical support information through a variety of services. This appendix describes the following services: ❑ On-line Technical Support ❑ Support from Your Network Supplier ❑ Support from 3Com ❑ Returning Products for Repair ❑...

B - 2 ONline Ethernet 10BASE-T Module User’s Guide Email Technical Support You can contact the Integrated Systems Division (formerly Chipcom) on the Internet for technical support using the e-mail address [email protected]. World Wide Web Site You can access the latest networking information on t...

Technical Support B - 3 When you contact your network supplier for assistance, have the following information ready: ❑ Diagnostic error messages ❑ A list of system hardware and software, including revision levels ❑ Details about recent configuration changes, if applicable If you are unable to contac...

B - 4 ONline Ethernet 10BASE-T Module User’s Guide For access to customer service for all 3Com products, call (800) 876-3266. You can also contact the Integrated Systems Division (ISD) on the Internet by using the e-mail address [email protected]. Returning Products for Repair A product sent dire...

Technical Support B - 5 3. Enter your full Internet e-mail address as the password (for example, [email protected] ). 4. Change to the mib or schema directory using the cd /pub/mibs or cd /pub/mibs/schemas command. 5. To view the 3Com MIB, OID, or schema entries, enter the dir command. ❑ To pause the...

Index 1 Index Numerics 3Com Bulletin Board Service (3ComBBS) , B-3 A Audience of Manual , xi B Backbone Fiber Medium , 2-2 bulletin board service , B-3 C Cable Types Shielded Twisted Pair , 1-1 Unshielded Twisted Pair , 1-1 Cabling Connectors , A-3, A-4 Fiber Backbone , 2-7, 2-8, 2-10 Redundant Link...