Nortel Networks 60-12T, 60-24T manual Chapter Troubleshooting, Verifying System Operations

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Chapter 4

Troubleshooting

This chapter provides common testing methods, possible reasons for problems, and possible steps to take to solve the problems.

Verifying System Operations

You can verify that all attached devices have valid connections. The hub monitors the link status for each port. If a device is properly connected to the hub and if the device is transmitting a link signal, the Link indicator will light up for the corresponding port.

Follow these steps if the Link indicator fails to light when you connect a device to the hub:

1.Verify that the twisted-pair cable is properly attached to the connected device and the hub.

2.Verify that the media connector, or RJ-45 connector, snaps securely into place when attached.

3.Verify that your cable is functioning properly. Try attaching the cable to another port on another attached device that appears to be functioning properly.

4.Check the length of each twisted-pair cable.

Each cable should be no longer than 100 meters, or 328 feet, long.

If you are using two cascaded Fast Ethernet hubs be sure the cable between the two hubs is no longer than 5 meters, or 16 feet, long.

5.Verify that the attached workstation has a functioning adapter card. Try the card in another workstation that is successfully connecting to the network.

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Contents Part No -A June Great America Parkway Santa Clara, CA Trademarks Copyright 1999 Nortel NetworksRestricted Rights Legend Statement of ConditionsIii Voluntary Control Council for Interference Vcci Statement Wichtige Sicherheitshinweise Nortel Networks NA Inc. Software License Agreement Vii Viii Contents Chapter Troubleshooting Figures Xii Tables Xiv Before You Begin PrefaceHow to Get Help Technical Solutions Center Telephone NumberHard-Copy Technical Manuals Chapter Introduction Product FeaturesProduct Description Autosense CapabilityFront Panel BayStack 60-12T Front Panel Color Activity Indication LED DescriptionsPort Partitioning Rear Panel Hardware and Environmental RequirementsMixed 10 Mb/s and 100 Mb/s Environment Chapter Typical ApplicationsExample of a Basic Mixed Network Basic Mixed NetworkExample of an Expanded Mixed Network Expanded Mixed NetworkDaisy-Chained Hubs BridgingPackage Contents Chapter InstallationMounting the Hub in a Standard 19 Equipment Rack Installing the HubConnecting the Hub To Other Devices Hub Port Connecting Device Mode Cable TypeCable Types and MDI/MDI-X Modes Connecting the Hub Through a RJ-45 Port Connecting the Hub Through the MDI Port Applying Power to the HubVerifying Port Status Port Status LED DescriptionsState Indication Verifying System Operations Chapter TroubleshootingDiagnosing Hub Indicators LED IndicatorsSymptom Cause Solution Appendix a Technical Specifications Table A-1 Product SpecificationsDescription Internal Switching Specifications Appendix B Cable and Connector Information Port AssignmentsRJ-45 Ports Table B-1 RJ-45 Pin Descriptions Cable AssignmentsIndex-1 IndexIndex-2

60-12T, 60-24T specifications

Nortel Networks 60-24T and 60-12T are both key components in the realm of networking, designed primarily for small to medium-sized businesses and institutions that require efficient and reliable telecommunications infrastructure. These products are part of Nortel’s broader suite of communication solutions and are known for their robust performance, ease of use, and flexible deployment options.

The Nortel 60-24T switch provides 24 Ethernet ports, allowing for the connection of multiple devices, such as computers, printers, and servers, all within a local area network. This model is particularly valued for its high-speed throughput and low latency, ensuring that data packets can be transmitted quickly and efficiently. With support for both 10/100 and gigabit Ethernet speeds, the 60-24T is adaptable to evolving network demands, making it a reliable choice for growing businesses.

On the other hand, the Nortel 60-12T model offers 12 Ethernet ports, tailored for smaller installations or as part of a larger network architecture. Its compact design does not compromise its performance, as it incorporates features like VLAN support, Quality of Service (QoS) capabilities, and advanced security protocols. These features aid in managing bandwidth allocation and protecting sensitive data, ensuring that critical business operations are maintained without interruption.

Both models utilize Nortel’s Intelligent Network architecture, which allows for simplified management and configuration of networking services. They support a variety of Ethernet standards, including IEEE 802.1Q for VLAN tagging, which enables users to segment their networks effectively, promoting better resource allocation and security.

Key characteristics include their fanless design in certain versions, ensuring quiet operation, along with energy-efficient capabilities that reduce overall power consumption. Additionally, they feature user-friendly interfaces that facilitate hassle-free setup and monitoring, making them suitable for IT teams with varying levels of expertise.

In summary, the Nortel Networks 60-24T and 60-12T switches stand out for their flexibility, robust feature set, and performance reliability. These attributes make them ideal solutions for any organization aiming to build or enhance their networking environment, addressing current needs while allowing for future growth.