Page 5 - Contents; How to Use This Guide
Contents ONline Ethernet 24-Port 10BASE-T Module Installation Guide v How to Use This Guide Audience . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xiiiStructure of This Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ....
Page 6 - Chapter 3 — Installing and Operating the Module
vi ONline Ethernet 24-Port 10BASE-T Module Installation Guide Setting Backbone Redundancy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-15 Redundant Twisted Pair Backbone . . . . . . . . . . . . . . . . . . . . . . . . 2-16 Chapter 3 — Installing and Operating the Module Precautionar...
Page 7 - Chapter 4 — Troubleshooting
ONline Ethernet 24-Port 10BASE-T Module Installation Guide vii Chapter 4 — Troubleshooting Troubleshooting Using the Port Status and Port Activity LEDs . . . . . . . . . . . 4-2 Troubleshooting Using the Port Status LEDs . . . . . . . . . . . . . . . . . . . . . 4-2Troubleshooting Using the Port Act...
Page 9 - Figures
ONline Ethernet 24-Port 10BASE-T Module Installation Guide ix Figures Figure 1-1. Typical 24-Port Module Configuration . . . . . . . . . . . . . . . . . 1-5 Figure 2-1. Star-Wiring Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8 Figure 2-2. Serial Configuration . . . . . . . . ...
Page 11 - Tables
ONline Ethernet 24-Port 10BASE-T Module Installation Guide xi Tables Table 2-1. Seven Basic Network Rules . . . . . . . . . . . . . . . . . . . . . . . . . 2-3 Table 2-2. LAN Product Equivalent Distances . . . . . . . . . . . . . . . . . . . . 2-6 Table 3-1. Procedures for Completing Installation . ...
Page 13 - Audience
ONline Ethernet 24-Port 10BASE-T Module Installation Guide xiii How to Use This Guide This guide tells you how to install and operate the 3Com ONline™ Ethernet 24-Port 10BASE-T Module for the ONline System Concentrator. It also includes information on monitoring this module using an ONline network m...
Page 14 - Structure of This Guide
xiv ONline Ethernet 24-Port 10BASE-T Module Installation Guide Structure of This Guide This guide contains the following chapters: Chapter 1, Introduction – Introduces the functions and features of the ONline Ethernet 24-Port 10BASE-T Module. Chapter 2, Designing and Expanding the Network – Shows po...
Page 15 - Document Conventions; Convention; slot
ONline Ethernet 24-Port 10BASE-T Module Installation Guide xv 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 Appl...
Page 16 - Related Documents; Note
xvi ONline Ethernet 24-Port 10BASE-T Module Installation Guide Related Documents This section provides information on supporting documentation, including: ❑ 3Com Documents ❑ Reference Documents Note: A Note . The information is important Note: Use STP lobe cables for your system. Caution: A Caution....
Page 17 - Com Documents; Reference Documents
ONline Ethernet 24-Port 10BASE-T Module Installation Guide xvii 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 Co...
Page 19 - Introduction; Ethernet 24-Port 10BASE-T Module Description
Introduction 1 - 1 1 Introduction This chapter introduces you to the 3Com ONline™ Ethernet 24-Port 10BASE-T Modules (Model Numbers 5124M-TPCL and 5124M-TP). The modules are referenced throughout this guide as the 24-Port Module. You can install both versions of the 24-Port Module in all 3Com ONline ...
Page 20 - Module Features
1 - 2 ONline Ethernet 24-Port 10BASE-T Module Installation Guide The ONline Ethernet 24-Port Module is an IEEE 802.3 repeater module that complies with the 10BASE-T standard. It connects up to 24 devices (PCs, terminals, printers, modems) to the ONline System Concentrator. The 24-Port Module (Model ...
Page 21 - Bank Switching Capability; Model Number 5124M-TPCL Features
Introduction 1 - 3 ❑ Is designed with all ports internally crossed over, as required by the 10BASE-T standard. This enables you to connect the 24-Port Module to a 10BASE-T transceiver without using an external crossover adapter. Bank Switching Capability Bank switching is the assignment of a group o...
Page 22 - Model Number 5124M-TP Features; Theory of Operation
1 - 4 ONline Ethernet 24-Port 10BASE-T Module Installation Guide Model Number 5124M-TP Features Model Number 5124M-TP permits you to connect individual 10BASE-T-compliant ports using 24 RJ-45 connectors (one connector per port). The RJ-45 connectors provide direct connections to 10BASE-T cables (one...
Page 26 - Understanding the General Rules; Rules for Configuring a Network
2 - 2 ONline Ethernet 24-Port 10BASE-T Module Installation Guide Understanding the General Rules This section describes general rules for configuring an Ethernet network using fiber as the backbone medium. It also provides rules to ensure that your network configuration conforms to distance limitati...
Page 27 - Rule
Designing and Expanding the Network 2 - 3 For more hardware-specific information on the 24-Port Module, refer to Appendix A. 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 the IEEE ...
Page 30 - LAN Equivalence; LAN Product
2 - 6 ONline Ethernet 24-Port 10BASE-T Module Installation 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 Pro...
Page 31 - Choosing a Network Backbone Cabling Structure
Designing and Expanding the Network 2 - 7 Choosing a Network Backbone Cabling Structure Because of fiber's long-distance capabilities and immunity to noise, 3Com strongly recommends using fiber as the backbone. This section describes: ❑ Building a Network (Star Configuration) ❑ Building a Network (S...
Page 33 - Building a Network (Serial Configuration)
Designing and Expanding the Network 2 - 9 Building a Network (Serial Configuration) Use a serial configuration for smaller diameter networks that are not expected to grow. Serial configurations reduce the overall network diameter by 190 meters for each concentrator in any path. Figure 2-2 shows 10BA...
Page 34 - 4-Port Module Configurations
2 - 10 ONline Ethernet 24-Port 10BASE-T Module Installation Guide 24-Port Module Configurations This section describes how to define total network size based on the limits of IEEE 802.3 collision detection. This section also describes how to construct a network consisting of a Fiber Backbone and 10B...
Page 38 - Using Patch Panels; Establishing Fault-Tolerant Configurations
2 - 14 ONline Ethernet 24-Port 10BASE-T Module Installation Guide Using Patch Panels Patch panels weaken signals that pass through them, thereby reducing achievable link distances. 3Com assumes the use of one patch panel in the 100 meter link distance calculations specified in this installation guid...
Page 39 - Setting Port Redundancy; Configuring Ports for Fault Tolerance; Normal Configuration; Flexible Redundant Configuration; Normal and Redundant Configuration; Setting Backbone Redundancy
Designing and Expanding the Network 2 - 15 Setting Port Redundancy When you enable redundancy between two ports, the ports are automatically enabled. Once port redundancy is enabled: ❑ Port 1 is the primary link, which passes data. ❑ Port 2 is the redundant link, which does not pass data in either d...
Page 40 - Redundant Twisted Pair Backbone
2 - 16 ONline Ethernet 24-Port 10BASE-T Module Installation Guide Redundant Twisted Pair Backbone You can implement twisted pair link redundancy between ONline System Concentrators using network management. Figure 2-5 shows an example of a redundant configuration between concentrators using 24-Port ...
Page 44 - Precautionary Procedures; Quick Installation; Step
3 - 2 ONline Ethernet 24-Port 10BASE-T Module Installation Guide Precautionary Procedures Electrostatic discharge (ESD) can damage static-sensitive devices on circuit boards. Follow these precautions when you handle the 24-Port Module. ❑ Do not remove the board from its antistatic shielding bag unti...
Page 46 - Unpacking Procedures; Setting the DIP Switches
3 - 4 ONline Ethernet 24-Port 10BASE-T Module Installation Guide Unpacking Procedures When unpacking your 24-Port Module: 1. Verify that the 24-Port Module is the model you ordered by checking the model number listed on the side of the shipping carton (Model Number 5124M-TPCL or Model Number 5124M-T...
Page 47 - DIP Switch Overview
Installing and Operating the Module 3 - 5 DIP Switch Overview The 24-Port Module has a single switch located on the module. This switch contains 10 DIP switches that let you: ❑ Assign 12-ports on each 50-pin connector to a network (Model Number 5124M-TPCL) ❑ Assign 12 ports on each Double Stack RJ-4...
Page 49 - DIP Switch Description
Installing and Operating the Module 3 - 7 DIP Switch Description DIP switches are labeled 1 through 10 (refer to Figure 3-1). DIP switches 1 through 4 enable features for connector 1 (CONN 1). DIP switches 5 through 8 enable features for connector 2 (CONN 2). DIP switch 9 isolates all ports (both co...
Page 52 - Installing the Module
3 - 10 ONline Ethernet 24-Port 10BASE-T Module Installation Guide Installing the Module You do not need to power down the ONline System Concentrator to install the 24-Port Module. You can insert the module while the concentrator is operating (this is called a hot swap ). To install a 24-Port Module:...
Page 55 - Using 90° Cable Connectors; Installing the Cable Tie-Wrap Kit
Installing and Operating the Module 3 - 13 Using 90° Cable Connectors 3Com recommends that you use 180° connectors with the 5124M-TPCL model. Because of the proximity of the two connectors, you must follow the special steps described below if you decide to use 90° (right-angle) connectors. This sect...
Page 57 - Securing 90° Cables to the Module
Installing and Operating the Module 3 - 15 Securing 90° Cables to the Module To secure 90° cables to the 24-Port Module connectors: 1. Remove the small cable-fastening screws from the shipping carton. 2. Remove the long screws (if present) from the 50-pin cables. 3. Attach a 50-pin cable connector t...
Page 59 - Configuration in a Managed Environment
Installing and Operating the Module 3 - 17 6. Attach the other ends of the cables to any of the following: ❑ A 10BASE-T transceiver ❑ A patch panel ❑ A 10BASE-T adapter card Configuration in a Managed Environment With an EMM already installed, all DIP switch settings on the 24-Port Module are ignore...
Page 60 - If Management is Not Available
3 - 18 ONline Ethernet 24-Port 10BASE-T Module Installation Guide ❑ Enabling Remote Diagnostics Mode ❑ Setting the Autopartition Threshold Value For additional information on any network management command described in this section, refer to the appropriate ONline Management Module Installation and ...
Page 61 - Before Configuring the Module; Enabling Port Redundancy
Installing and Operating the Module 3 - 19 Before Configuring the Module When you first install the 24-Port Module in a managed concentrator: 1. The network (channel) defaults to isolated mode and all ports are automatically disabled so unapproved stations cannot be added. Therefore, you must use ma...
Page 63 - Enabling Remote Diagnostics Mode
Installing and Operating the Module 3 - 21 SET MODULE { slot } NETWORK {ethernet_1} {ethernet_2} {ethernet_3} {isolated} To assign a specific connector (bank of 12 ports) to a network, use the following management command: SET MODULE { slot } CONNECTOR_{1}_NETWORK {ethernet_1} {2} {ethernet_2} {ethe...
Page 64 - Setting the Autopartition Threshold Value
3 - 22 ONline Ethernet 24-Port 10BASE-T Module Installation Guide Setting the Autopartition Threshold Value To set the maximum number of data collisions an installed management module allows on a port before it partitions the port, use the following management command: SET MODULE {slot} AUTOPARTITIO...
Page 65 - Saving Module Configurations
Installing and Operating the Module 3 - 23 Saving Module Configurations After you make configuration changes to a module and ports, you must issue the SAVE MODULE_PORT command to save the new settings. Showing Module Configurations You can display status information about the 24-Port Module using th...
Page 66 - Show Module
3 - 24 ONline Ethernet 24-Port 10BASE-T Module Installation Guide Show Module To display information for a module in a specific slot, use the following management command: SHOW MODULE { slot } {no_verbose} {verbose} To display basic information about a 24-Port Module installed in slot 3, specify the...
Page 67 - Show Port
Installing and Operating the Module 3 - 25 Show Port To display information for a specific port, use the following management command: SHOW PORT { slot.port } {no_verbose} { slot .all} {verbose} To display basic information for a specific port, specify the NO_VERBOSE command argument. To display bas...
Page 69 - Gathering Network Statistics
Installing and Operating the Module 3 - 27 Gathering Network Statistics When you assign all ports on the 24-Port Module to the same network, an installed management module can simultaneously monitor all ports on one connector individually as it monitors the ports on the other connector collectively ...
Page 70 - Selecting the Per-Port Counters Connector
3 - 28 ONline Ethernet 24-Port 10BASE-T Module Installation Guide Selecting the Per-Port Counters Connector When you select a connector, network management monitors the other connector collectively, reporting statistics for all 12 ports as a single “port.” To select which 12-port connector you want ...
Page 71 - Monitoring the Front Panel
Installing and Operating the Module 3 - 29 Monitoring the Front Panel The LEDs on the front panel of the 24-Port Module allow you to monitor the status of 12 ports on each connector. The 24-Port Module has an Activity LED and a Status LED for each connector. Figure 3-7 shows the location of the LEDs...
Page 73 - LED Name
Installing and Operating the Module 3 - 31 Table 3-4 describes the LEDs for Model Numbers 5124M-TPCL and 5124M-TP. Table 3-4. 24-Port Module LED Interpretations LED Name Color State Indicates Activity(Ports 1 to 12) (Ports 13 to 24) Yellow Off No packets are received on the ports on this connector. ...
Page 74 - Verifying LED and Network Assignments; Using the LED Check Button
3 - 32 ONline Ethernet 24-Port 10BASE-T Module Installation Guide Verifying LED and Network Assignments Once you install the 24-Port Module, verify module operation using the front panel of the ONline Controller Module. Using the LED Check Button The ONline Controller Module is equipped with an LED ...
Page 75 - LED State
Installing and Operating the Module 3 - 33 ❑ If the module is in isolated mode, the Port Status LEDs on that module (or connector) do not light. ❑ Activity LEDs remain on during the network check sequence. The network check sequence repeats at least three times, and each check sequence lasts for app...
Page 77 - Troubleshooting
Troubleshooting 4 - 1 4 Troubleshooting This chapter describes fault conditions and troubleshooting procedures for the ONline Ethernet 24-Port Modules, Model Numbers 5124M-TPCL and 5124M-TP. This chapter contains the following sections: ❑ Troubleshooting Using the Port Status LEDs ❑ Troubleshooting ...
Page 78 - Troubleshooting Using the Port Status LEDs
4 - 2 ONline Ethernet 24-Port 10BASE-T Module Installation Guide Troubleshooting Using the Port Status and Port Activity LEDs In certain situations, the Port Status and Port Activity LEDs may not light. This section describes troubleshooting using the: ❑ Port Status LEDs ❑ Port Activity LEDs Trouble...
Page 80 - Troubleshooting Using the Port Activity LEDs; Technical Assistance
4 - 4 ONline Ethernet 24-Port 10BASE-T Module Installation Guide Troubleshooting Using the Port Activity LEDs Under some conditions a Port Activity LED may not light. Use the troubleshooting suggestions in Table 4-2 to help determine why this has occurred and to isolate the source of the problem. Te...
Page 81 - Specifications
Specifications A - 1 A Specifications This appendix lists specifications for the ONline Ethernet 24-Port Module (Model Numbers 5124M-TPCL and 5124M-TP). This appendix contains the following sections: ❑ General Specifications ❑ Power Specifications ❑ Environmental Specifications ❑ Mechanical Specific...
Page 82 - General Specifications; Specification
A - 2 ONline Ethernet 24-Port 10BASE-T Module Installation Guide General Specifications Table A-1 defines general specifications for the 24-Port Module. Table A-1. 24-Port Module General Specifications Specification Value Model Number 5124M-TP, 5124M-TPCL Ports Per Module 24 Data Rate 10 Mbps (milli...
Page 83 - Power Specifications
Specifications A - 3 Power Specifications Table A-2 lists power specifications for the 24-Port Module. ONline Requirements ONline Fault-Tolerant Controller Module (Model Numbers 5000M-RCTL, 5000M-RCLS) A Fault-Tolerant Controller Module is not required if you have a 6-Slot ONline System Concentrator...
Page 84 - Fuse Specifications for 24-Port Module; Environmental Specifications
A - 4 ONline Ethernet 24-Port 10BASE-T Module Installation Guide Table A-3 lists fuse specifications for the 24-Port Module. Environmental Specifications Table A-4 lists environmental specifications for the 24-Port Module. Table A-3. 24-Port Module Fuse Specifications Fuse Specifications for 24-Port...
Page 85 - Mechanical
Specifications A - 5 Mechanical Specifications Table A-5 lists mechanical specifications for the 24-Port Module. Twisted Pair Cable and Connector Specifications You can use many types of cables and connectors to link a 24-Port 10BASE-T Module to your network. These cables and connectors are explaine...
Page 86 - Twisted Pair Cable Specifications
A - 6 ONline Ethernet 24-Port 10BASE-T Module Installation Guide Twisted Pair Cable Specifications The cables that are supported must meet the following specifications: ❑ 22, 24, or 26 gauge twisted pair cable ❑ 80 to 150 ohm impedance ❑ Minimum of 2 pairs A pair is usually a solid color wire twiste...
Page 87 - Twisted Pair Connector Specifications; RJ-45 Connector Pinouts
Specifications A - 7 Note that the non-plenum type 1, 2, and 6 cables are insulated with polyethylene. The plenum type 9 cable is insulated with polyvinylchloride. *Voice pairs in the IBM Type 2 cable cannot be used for Token Ring data transmission. Twisted Pair Connector Specifications The IEEE 802...
Page 88 - 0-Pin Connector Pinouts
A - 8 ONline Ethernet 24-Port 10BASE-T Module Installation Guide Figure A-1. 24-Port Module RJ-45 Connector Pinouts 50-Pin Connector Pinouts Figure A-2 provides examples of a 50-pin cable (male) connector and a 50-pin (female) connector on the 24-Port Module.
Page 92 - Connecting Twisted Pair Cables
A - 12 ONline Ethernet 24-Port 10BASE-T Module Installation Guide Connecting Twisted Pair Cables Follow these steps to connect twisted pair cables: 1. Connect cables at the active concentrator location. 2. Connect transceivers. Refer to the ONline System Concentrator Installation and Operation Guide...
Page 93 - Technical Support; On-line Technical Support
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 ❑...
Page 94 - Email Technical Support; Support from Your Network Supplier
B - 2 ONline Ethernet 24-Port 10BASE-T Module Installation 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 in...
Page 95 - Support from 3Com
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...
Page 96 - Returning Products for Repair
B - 4 ONline Ethernet 24-Port 10BASE-T Module Installation 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 pro...
Page 97 - Com Technical Publications
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...
Page 99 - Index; Numerics
Index 1 Index Numerics 10BASE-FB Links Determine Maximum Distance , 2-7 10BASE-FB Module Fiber Backbone, UTP-to-the-Desk , 2-10 Port Redundancy , 2-15 Serial Configuration , 2-9 Star Configuration , 2-8 24-Port Module Activity LEDs , 4-4 Features , 1-2 Hot Swap Capability , 1-2 Installing , 3-10 Por...
