3Com 4250T, 4228G, 4226T manual Installing the Switch

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28CHAPTER 2: INSTALLING THE SWITCH

■1000BASE-LX GBIC transceiver

Use this transceiver to connect the Switch directly to a single-mode fiber-optic cable or to multimode fiber using a conditioned launch cable.

■1000BASE-LH70 GBIC transceiver

Use this transceiver to connect the Switch directly to a single-mode fiber-optic cable or to multimode fiber using a conditioned launch cable.

■Fiber SC connector

■Type 4 GBIC with internal EEPROM fitted.

If the GBIC transceiver is faulty, it will not operate within the Switch. See “Solving Hardware Problems” on page 55.

Do not use non-3Com GBICs. If the GBIC transceiver is invalid it will not be recognised by the Switch.

Use the following sequence of steps to activate the GBIC ports.

1To insert one of the transceivers into a GBIC expansion port on the Switch:

a Orient the transceiver so that the fiber-optic duplex subscriber connector (SC) is toward you, as shown in Figure 7.

b Gently slide the transceiver into the GBIC port until it clicks into place.

2If you wish to remove the transceiver, compress the side tabs and gently pull the transceiver out of the port.

CAUTION: GBIC transceivers are keyed and can be properly inserted only one way. If the transceiver does not click when you insert it, remove it, turn it over, and reinsert it.

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Contents SuperStack 3Com Corporation 350 Campus Drive Marlborough, MA United States Government LegendContents Setting UP for Management Safety Information PIN -OUTSPage About this Guide Icon Description ConventionsConvention Description Related DocumentationAbout this Guide Introducing About the Switch FamilySwitch 4200 Family Front View DetailIntroducing the Superstack 3 Switch 4200 Series Fiber GBICs 1000BASE-T GBICsColor Indicates Port Status LEDs 10BASE-T/100BASE-TX ports Port Status LEDs Gbic portsPower/Self Test LED Color IndicatesUnit LEDs Alert LEDSystem RPS. See Connecting a Redundant Power System on Rear View DetailFeature Switch 4200 Family Automatic IP Configuration Duplex ModeRmon Alarm Quality of Service QoSInstalling the Switch Choosing a Suitable Package ContentsSite Rack-mounting Repeat steps 2 and 3 for the other side of the Switch Fitting a bracket for rack-mountingTop of Each Other Placing Units OnStacking Units Power-up Powering-upSwitch 4200 Family SequencePower/Self Test LED colors Color StateFiber cables Cross-over Cable Straight-through CableApproved Gbic The 3Com approved Gbic transceivers are TransceiversInstalling the Switch Gbic Installing the Switch Setting UP for Management Setting Up Configure IP information manually for your Switch or viewAutomatically configured IP information OverviewManual IP Configuration Automatic IP ConfigurationSetting UP for Management Manually Configuring IP Information Pre-requisitesConfiguring the Workstation with IP Information Connecting the Workstation to the SwitchSetting Up the Switch with IP Information Using Command Line Interface via Telnet Example top-level command line interface menu Connecting a workstation to the Switch via the console port Setting Up the Switch with IP Information Example top-level command line interface menu Viewing Configured IPAutomatically Viewing Automatically Configured IP Information Viewing IP Information via the Console Port Methods of Managing a Switch Refer to Setting Up Command Line Interface Management on Command Line Network Using TelnetInterface Management CLI Management viaInterface Setting Up WebChoosing a Browser Setting Up Snmp Management Protocol Snmp can manage a Switch ifOver the Network Management workstationDefault Users User Default Name Password Access LevelSecurity Device User Modify operation on the web interface Setting UP for Management Problem Solving For Technical Support information, see Appendix DSolving Problems Solutions belowPower LED does not light On powering-up, the Power/Self Test LED lights yellowProblems Solving Communication ProblemsSolving Hardware Snmp fan fail trap hardware failure IP AddressingFormation Solving StackHow do you obtain a registered IP Address? Solving Software Upgrade Problems Problem Solving Safety Information Important Safety Information This must be approved for the country where it is usedImportant Safety Information ’information de Sécurité Importante Schko Wichtige Sicherheitsinformationen Vorsicht Europe Appendix a Safety Information Null Modem Cable PC-AT Serial CablePin to RS-232 25-pin Pin to 9-pinModem Cable RJ-45 PinAssignments Pin Number 10/100 1000Pin Number 10/100 1000 Appendix B PIN-OUTS Switch 4226T 3C17300 Protocols Used for Administration Terminal EmulationSwitch 4250T 3C17302 Switch 4228G 3C17304 Services Register YourProduct PurchaseAccess Software TroubleshootOnline DownloadsContact Us Country Telephone Number Latin America Telephone Technical Support and Repair800 876 Appendix D Obtaining Support for Your Product Index NumbersIndex Regulatory Notices

4250T, 4226T, 4228G specifications

The 3Com 4228G, 4226T, and 4250T are professional-grade network switches designed for businesses seeking to enhance their network infrastructure. These models offer robust performance and reliability, catering to various networking needs, from small offices to large enterprise environments.

The 3Com 4228G switch is a 28-port gigabit Ethernet switch designed for high-bandwidth applications. It provides 24 Gigabit Ethernet ports with 802.3af Power over Ethernet (PoE) capability, allowing devices such as IP phones and wireless access points to be powered directly through the Ethernet cables. This feature simplifies installation and reduces additional cabling costs. The switch also supports VLAN tagging for network segmentation, improving security and performance. Its advanced traffic management lets IT administrators prioritize network traffic effectively, ensuring critical applications receive the necessary bandwidth.

On the other hand, the 3Com 4226T is a 26-port gigabit Ethernet switch, primarily designed for environments requiring a high level of connectivity without PoE. It offers similar features to the 4228G, such as VLAN support and enhanced traffic management capabilities. The 4226T is ideal for businesses that do not require power over Ethernet yet need reliable, high-speed networking capabilities. With 26 ports, this switch is an excellent choice for medium-sized enterprises looking to upgrade their network infrastructure without overwhelming their existing resources.

The 3Com 4250T is a more advanced switch, offering 48 Gigabit Ethernet ports and a robust feature set suitable for more complex networking environments. It includes Layer 2 and Layer 3 functionality, allowing for advanced routing and switching capabilities, making it highly adaptable to various network designs. The 4250T also simplifies network management through its extensive configuration options and support for IPv6. Moreover, it features an efficient cooling system and reduced power consumption, aligning with today’s growing demand for energy-efficient solutions.

All three models utilize advanced technologies such as Spanning Tree Protocol (STP) for loop prevention, QoS mechanisms to prioritize traffic, and comprehensive security features to protect the network from unauthorized access. With their different port configurations and capabilities, the 3Com 4228G, 4226T, and 4250T switches provide exceptional performance and flexibility, making them ideal for businesses aiming to enhance their networking capabilities.
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