3Com 4226T, 4228G, 4250T manual Contact Us

Page 77

Contact Us 77

 

To send a product directly to 3Com for repair, you must first obtain a

 

 

return authorization number (RMA). Products sent to 3Com, without

 

 

authorization numbers clearly marked on the outside of the package, will

 

 

be returned to the sender unopened, at the sender’s expense. If your

 

 

product is registered and under warranty, you can obtain an RMA

 

 

number online at http://eSupport.3com.com/. First time users will

 

 

need to apply for a user name and password.

 

 

 

 

 

Contact Us

3Com offers telephone, e-mail and internet access to technical support

 

 

and repair services. To access these services for your region, use the

 

 

appropriate telephone number, URL or e-mail address from the list below.

 

 

Telephone numbers are correct at the time of publication. Find a current

 

 

directory of contact information posted on the 3Com web site at

 

 

http://csoweb4.3com.com/contactus/

 

 

 

 

 

 

 

Country

Telephone Number

Country

Telephone Number

 

 

 

 

Asia, Pacific Rim Telephone Technical Support and Repair

 

 

Australia

1 800 678 515

Philippines

1235 61 266 2602 or

 

Hong Kong

800 933 486

 

1800 1 888 9469

 

India

+61 2 9424 5179 or

P.R. of China

800 810 3033

 

 

000800 650 1111

Singapore

800 6161 463

 

Indonesia

001 803 61009

S. Korea

080 333 3308

 

Japan

00531 616 439 or

Taiwan

00801 611 261

 

 

03 3507 5984

Thailand

001 800 611 2000

 

Malaysia

1800 801 777

 

 

 

New Zealand

0800 446 398

 

 

 

Pakistan

+61 2 9937 5083

 

 

 

You can also obtain support in this region using the following e-mail: apr_technical_support@3com.com

Or request a repair authorization number (RMA) by fax using this number:

+ 65 543 6348

 

 

Europe, Middle East, and Africa Telephone Technical Support and Repair

 

From anywhere in these

+44 (0)1442 435529

 

regions, call:

 

 

From the following countries, you may use the numbers shown:

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Contents SuperStack United States Government Legend 3Com Corporation 350 Campus Drive Marlborough, MAContents Setting UP for Management PIN -OUTS Safety InformationPage About this Guide Convention Description ConventionsIcon Description Documentation RelatedAbout this Guide Introducing Family About the SwitchFront View Detail Switch 4200 FamilyIntroducing the Superstack 3 Switch 4200 Series 1000BASE-T GBICs Fiber GBICsColor Indicates Port Status LEDs 10BASE-T/100BASE-TX ports Port Status LEDs Gbic portsColor Indicates Power/Self Test LEDUnit LEDs Alert LEDRear View Detail System RPS. See Connecting a Redundant Power System onDuplex Mode Feature Switch 4200 Family Automatic IP ConfigurationRmon Alarm Quality of Service QoSInstalling the Switch Site Package ContentsChoosing a Suitable Rack-mounting Fitting a bracket for rack-mounting Repeat steps 2 and 3 for the other side of the SwitchStacking Units Placing Units OnTop of Each Other Powering-up Power-upSwitch 4200 Family SequenceColor State Power/Self Test LED colorsCross-over Cable Straight-through Cable Fiber cablesTransceivers Approved Gbic The 3Com approved Gbic transceivers areInstalling the Switch Gbic Installing the Switch Setting UP for Management Configure IP information manually for your Switch or view Setting UpAutomatically configured IP information OverviewAutomatic IP Configuration Manual IP ConfigurationSetting UP for Management Pre-requisites Manually Configuring IP InformationSetting Up the Switch with IP Information Connecting the Workstation to the SwitchConfiguring the Workstation 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 Automatically Configured IPViewing 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 Network Using Telnet Command LineInterface Management CLI Management viaChoosing a Browser Setting Up WebInterface Management Protocol Snmp can manage a Switch if Setting Up SnmpOver the Network Management workstationUser Default Name Password Access Level Default UsersSecurity Device User Modify operation on the web interface Setting UP for Management For Technical Support information, see Appendix D Problem SolvingSolutions below Solving ProblemsPower LED does not light On powering-up, the Power/Self Test LED lights yellowSolving Communication Problems ProblemsSolving Hardware Snmp fan fail trap hardware failure IP AddressingHow do you obtain a registered IP Address? Solving StackFormation Solving Software Upgrade Problems Problem Solving Safety Information This must be approved for the country where it is used Important Safety InformationImportant Safety Information ’information de Sécurité Importante Schko Wichtige Sicherheitsinformationen Vorsicht Europe Appendix a Safety Information PC-AT Serial Cable Null Modem CablePin to RS-232 25-pin Pin to 9-pinRJ-45 Pin Modem CableAssignments Pin Number 10/100 1000Pin Number 10/100 1000 Appendix B PIN-OUTS Switch 4226T 3C17300 Terminal Emulation Protocols Used for AdministrationSwitch 4250T 3C17302 Switch 4228G 3C17304 Register Your ServicesProduct PurchaseTroubleshoot Access SoftwareOnline DownloadsContact Us Latin America Telephone Technical Support and Repair Country Telephone Number800 876 Appendix D Obtaining Support for Your Product Numbers IndexIndex 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.