3Com Series 760 manual Troubleshooting Tips

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3-20CHAPTER 3: TROUBLESHOOTING

Troubleshooting Tips

Check the CardBus PC Card installation in Chapter 1.

Inspect all cables and connections.

Make sure you have the latest BIOS for your notebook.

Try the notebook at a known working location.

Try the CardBus PC Card in a known working notebook.

If you removed the CardBus PC Card while the PC Card Diagnostics Program was running or shut down your notebook without closing the PC Card Diagnostics Program, you must remove the PC Card Diagnostics and driver and reinstall the 3Com network driver.

If you think you have resource conflicts (I/O base address or interrupts) run the Windows 95 conflict troubleshooter as described in the previous section. It is normal for the PC Card to conflict with the CardBus controller.

Replace the failed CardBus PC Card with a working CardBus PC Card and run the diagnostic tests again, using the same option settings as those used on the failed CardBus PC Card. If the working CardBus PC Card passes all tests, the original CardBus PC Card is probably defective. For information on product repair, see Appendix B.

If you are running a 16-bit modem PC Card and the CardBus PC Card in the same notebook, and you experience lockups on boot, try changing the modem IRQ to the same value as the PCMCIA socket IRQ. Otherwise, insert the modem PC Card after you reboot.

If trouble persists, contact your MIS department or network manager.

For additional troubleshooting information, see the 3Com Web site at www.3com.com.

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Contents 3Com Megahertz 10/100 LAN CardBus PC Card User Guide 3Com Corporation 5400 Bayfront Plaza Santa Clara, California Contents Troubleshooting Specifications Page Installing the PC Card Setting CardBus Mode Before You BeginToshiba Notebooks Enable CardBus mode IBM ThinkPad Series 760 NotebooksClick OK Restart the notebook Connecting the 3CCFE575BT CardBus PC Card 2Connecting the CardBus PC Card3Connecting the CardBus PC Card Page Installing the Network Driver Before You Install the Network Driver Which Driver Installation Instructions Should You Use?Which Windows 95 Version Are You Running? Update Device Driver Wizard window, click Next Click Other Locations Insert the LAN Installation DiskWindows 95 Version 4.00.950B OSR Type a and click OKWindows 95 Versions 4.00.950 and 4.00.950A New Hardware Wizard Window, click NextConfirming Installation Click the Device Manager tabDouble-click the Network Adapters icon Windows NT 4.0 with Networking Installed Windows NT VersionClick Have Disk Click OK to accept resource allocations or enter new valuesWindows NT 4.0 without Networking Installed Insert the LAN Installation Disk Type a and click OKClick Yes Select the appropriate network services Click Next Click OKClick Next Select the appropriate network protocolAsk your system administrator if you need help Add Network Adapter window appears Windows for Workgroups WFW Installing the DOS Enhanced-Mode Driver for WFW Select Install Microsoft Windows Network and then click OKClick Restart AutoLink for Windows 3.x, Windows for Workgroups, and DOS Supported Network Drivers Network Text File Name Network Driver Name Operating SystemPage Troubleshooting LEDs 13CCFE575BT CardBus PC Card Cable LEDs3Com PC Card Diagnostics Program Accessing the CardBus PC Card Help SystemSelect 3Com PC Card Utilities Running the CardBus PC Card Self-Test Click the Help buttonTnicdiag.exe Eeprom Fifo Diagnostics Program Name Echo Server Network Adapter Running the Echo TestOn both computers 5Echo Test Responder ScreenTroubleshooting Support Services Click Start6Support Screen Generating a Problem Report 7Problem Report Main Screen8Computer Information Screen DOS Diagnostics Program Select 3Com PC Card Diagnostic UtilitiesResolving Hardware Resource Conflicts Control Panel, select Add/Remove ProgramsDisabling PC Card Pcmcia Support for Windows Changing the I/O, IRQ, or Memory RangeChange I/O or IRQ value and click Confirm Select the Resources tabRe-enabling PC Card Support for Windows Double-clickAdd New HardwareClick Pcic or compatible Pcmcia controller Click Change DriverClick Disable and then click OK Reboot the notebook Disabling PC Card Pcmcia Support for Windows NTRe-enabling PC Card Pcmcia Support for Windows NT Click HW ProfilesFrequently Asked Questions Frequently Asked Questions AnswerFrequently Asked Questions Click Add/RemoveTo discover switched communication paths Troubleshooting Tips Configuration Settings Configuration Setting DescriptionsOption Default Setting Available Settings DuplexDisplaying Configuration CIS Memory AddressBase Address Interrupt Request LevelDisplaying Configuration 2PC Card Details Screen Changing Configuration Settings Click OK or Cancel to exit the screenDOS Configuration Program 6CHAPTER 4 Changing Configuration Physical Dimensions Network InterfaceEnvironmental Operating Range Card Information Structure CIS and Memory SizeNetwork Cable Specifications Power RequirementsMean Time Between Failures hours calculated FCC CertificationOnline Technical Services 3Com Bulletin Board ServiceWorld Wide Web Site 3ComFacts Automated Fax Service Access by Analog ModemAccess by Digital Modem 408 6543ComForum on CompuServe Online Service Support from Your Network SupplierLog on to your CompuServe account Press Return to see the 3ComForum main menuReturning Products for Repair Country Telephone Number Fax NumberIndex NumbersURL B-1 3Com Corporation Limited Warranty FCC Class B Statement Industry Canada Class B Emmission Compliance Statement

Series 760 specifications

The 3Com Series 760 is a high-performance multilayer switch designed for enterprise networks, providing robust features that cater to the demanding requirements of modern IT infrastructure. With a scalable architecture, the 3Com Series 760 is ideal for medium to large enterprises needing to efficiently manage their network traffic while ensuring high availability and reliability.

One of the standout features of the 3Com Series 760 is its multilayer switching capability. It operates at both Layer 2 and Layer 3, allowing for efficient data forwarding based on MAC addresses and IP addresses. This flexibility enables the switch to accommodate a wide range of applications, including voice, video, and data, ensuring optimal performance across varied workloads.

Another significant characteristic of the Series 760 is its advanced Quality of Service (QoS) support. The switch includes features that prioritize network traffic, which is crucial for applications sensitive to delays, such as Voice over IP (VoIP) and video conferencing. The ability to configure priority rules ensures that critical data is transmitted with minimal latency, enhancing overall user experience.

The Series 760 also supports Power over Ethernet (PoE), which allows it to deliver power to connected devices such as IP phones, wireless access points, and surveillance cameras through the Ethernet cable. This eliminates the need for additional power sources, simplifying installation and reducing clutter in network environments.

From a security perspective, the 3Com Series 760 offers features such as IEEE 802.1X port-based network access control, which helps to enforce security policies and protect the network from unauthorized access. Enhanced access controls and security protocols ensure that sensitive data remains secure while maintaining compliance with industry standards.

Furthermore, the switch is designed for simplified management and monitoring. It provides a web-based interface and supports SNMP (Simple Network Management Protocol), allowing IT administrators to monitor network performance and configure settings remotely. This feature streamlines network management tasks, reducing the operational burden on IT teams.

In summary, the 3Com Series 760 is a versatile and powerful multilayer switch that meets the needs of growing enterprises. With its advanced features, including multilayer switching, QoS support, PoE capability, robust security measures, and simplified management tools, it stands out as a reliable choice for organizations looking to enhance their network performance and security in a rapidly evolving digital landscape.