3Com 4500G Series Getting Started Manual
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3Com 4500G Series Getting Started Manual

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3Com
Switch 4500G Family
Getting Started Guide
Switch 4500G 24-Port
Switch 4500G 48-Port
Switch 4500G PWR 24-Port
Switch 4500G PWR 48-Port
www.3Com.com
Part Number: 10014899 Rev. AC
Published: October 2007

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Summary of Contents for 3Com 4500G Series

  • Page 1 ® 3Com Switch 4500G Family Getting Started Guide Switch 4500G 24-Port Switch 4500G 48-Port Switch 4500G PWR 24-Port Switch 4500G PWR 48-Port www.3Com.com Part Number: 10014899 Rev. AC Published: October 2007...
  • Page 2 3Com Corporation reserves the right to revise this documentation and to make changes in content from USA 01752-3064 time to time without obligation on the part of 3Com Corporation to provide notification of such revision or change. 3Com Corporation provides this documentation without warranty, term, or condition of any kind, either implied or expressed, including, but not limited to, the implied warranties, terms or conditions of merchantability, satisfactory quality, and fitness for a particular purpose.

  • Page 3: Table Of Contents

    ONTENTS BOUT UIDE Before You Start Conventions Related Documentation 4500G F NTRODUCING THE WITCH AMILY About the Switch 4500G Switch 4500G 24-Port and 48-Port—Front and Rear Panel Detail Switch 4500G 24-Port and 48-Port Front Panel LEDs Switch 4500G PWR 24-Port and 48-Port —Front and Rear Panel Detail Switch 4500G PWR 24-Port and 48-Port Front Panel LEDs System Specifications of the Switch 4500G NSTALLING THE...
  • Page 4 Purchase Extended Warranty and Professional Services Access Software Downloads Contact Us ETWORK ANAGEMENT 3Com Network Supervisor 3Com Network Director 3Com Network Access Manager 3Com Enterprise Management Suite Integration Kit with HP OpenView Network Node Manager EDUNDANT OWER UPPLY AFETY NFORMATION Important Safety Information L’information de Sécurité...

  • Page 5: About This Guide

    BOUT UIDE Download the latest Thank you for purchasing a 3Com Switch 4500G. As part of our software and commitment to bringing you the most capable and dependable documentation for your network equipment, 3Com offers free software maintenance 3Com switch updates and documentation updates on our website.

  • Page 6: Conventions

    This guide contains information on the features supported by your switch and how they can be used to optimize your network. It is supplied in PDF format on the 3Com Web site. 3Com Switch 4500G Family Command Reference Guide ■...

  • Page 7: Introducing The Switch 4500G Family

    System Specifications of the Switch 4500G ■ About the Switch The 3Com® Switch 4500G (hereinafter referred to as Switch 4500G) are Gigabit 4500G Ethernet switching products developed by 3Com. The 3Com® Switch 4500G family delivers flexible quad-speed performance (10/100/1000 and 10-Gigabit) and advanced voice-optimized features such as Power over Ethernet (PoE), auto-QoS and auto-voice VLAN.

  • Page 8: Switch 4500G 24-Port And 48-Port-Front And Rear Panel Detail

    1: I 4500G F HAPTER NTRODUCING THE WITCH AMILY For information about using the software features of the Switch, refer to the “Command Reference Guide” and the “Configuration Guide”. Summary of Hardware Table 2 summarizes the hardware features that are supported by the Switch Features 4500G.
  • Page 9 Switch 4500G 24-Port and 48-Port—Front and Rear Panel Detail Figure 2 displays the rear panel of the Switch 4500G 24-Port unit. Figure 2 Switch 4500G 24-Port—rear panel (1) AC power input (2) Grounding terminal (3) Extended slot 1 (4) Extended slot 2 Figure 3 displays the front panel of the Switch 4500G 48-Port unit.

  • Page 10: Switch 4500G 24-Port And 48-Port Front Panel Leds

    1: I 4500G F HAPTER NTRODUCING THE WITCH AMILY Switch 4500G 24-Port The Switch 4500G 24-Port and 48-Port units provide LEDs on the front panel to and 48-Port Front allow you to monitor the switch. Table 3 describes these LEDs. You can use the Panel LEDs mode button on the front panel to switch the LEDs display mode (rate mode or duplex mode).
  • Page 11 Switch 4500G 24-Port and 48-Port Front Panel LEDs Table 3 Switch 4500G 24-Port and 48-Port Front Panel LEDs Label Status Description 7-segment Unit POST Green, The POST ID of the in-process test is digitron running blinking displayed. display POST Red, The POST ID of the failed test blinks.
  • Page 12 1: I 4500G F HAPTER NTRODUCING THE WITCH AMILY Table 3 Switch 4500G 24-Port and 48-Port Front Panel LEDs Label Status Description 10/100/1000 Rate Green The port works at the rate of 1000 BASE-T mode Mbps; the LED blinks quickly when Ethernet port the port is sending or receiving status LED...

  • Page 13: Switch 4500G Pwr 24-Port And 48-Port -Front And Rear Panel Detail

    Switch 4500G PWR 24-Port and 48-Port —Front and Rear Panel Detail Switch 4500G PWR Figure 5 displays the front panel of the Switch 4500G PWR 24-Port unit. 24-Port and 48-Port Figure 5 Switch 4500G PWR 24-Port Front Unit’s Front Panel —Front and Rear Panel Detail (1) 10/100/1000 BASE-T autosensing...
  • Page 14 1: I 4500G F HAPTER NTRODUCING THE WITCH AMILY Figure 7 displays the Switch 4500G PWR 48-Port unit’s front panel. Figure 7 Switch 4500G PWR 48-Port Unit’s Front panel (1) 10/100/1000 BASE-T autosensing (2) Console port Ethernet port status LEDs (3) 7-segment digitron display (4) Mode switching button (5) Mode LED...

  • Page 15: Switch 4500G Pwr 24-Port And 48-Port Front Panel Leds

    Switch 4500G PWR 24-Port and 48-Port Front Panel LEDs Switch 4500G PWR Table 4 describes the Switch 4500G PWR 24-Port and PWR 48-Port units’ LEDs. 24-Port and 48-Port Table 4 Switch 4500G PWR 24-Port and 48-Port Front Panel LEDs Front Panel LEDs Label Status Description...
  • Page 16 1: I 4500G F HAPTER NTRODUCING THE WITCH AMILY Table 4 Switch 4500G PWR 24-Port and 48-Port Front Panel LEDs Label Status Description 7-segment Unit POST Green, The POST ID of the in-process digitron running blinking test is displayed. display POST failed Red, blinking The POST ID of the failed test...
  • Page 17 Switch 4500G PWR 24-Port and 48-Port Front Panel LEDs Table 4 Switch 4500G PWR 24-Port and 48-Port Front Panel LEDs Label Status Description 10/100/1000 None Rate mode Green The port works at the rate of BASE-T 1000 Mbps; the LED blinks Ethernet port quickly when the port is status LED...

  • Page 18: System Specifications Of The Switch 4500G

    1: I 4500G F HAPTER NTRODUCING THE WITCH AMILY System Specifications Table 5 provides the system specifications for the Switch 4500G. of the Switch 4500G Table 5 System specifications of the Switch 4500G Switch 4500G Switch 4500G Switch 4500G Switch 4500G 24-Port 48-Port PWR 24-Port...

  • Page 19: Installing The Switch

    NSTALLING THE WITCH ® This section contains information that you need to install and set up your 3Com switch. For information on upgrading your switch, refer to the Switch 4500G Release Notes available at www.3com.com. WARNING: Safety Information. Before you install or remove any components...

  • Page 20: Rack-Mounting The Switch

    2: I HAPTER NSTALLING THE WITCH ATTENTION : le fait d’ouvrir le commutateur ou d’altérer la vignette de garantie pourrait rendre la garantie nulle. WARNUNG: Öffnen des Switches oder Manipulation des Garantieaufklebers kann das Erlöschen der Garantie zur Folge haben. PRECAUCIÓN: si se abre el conmutador o se manipula el adhesivo de la garantía, ésta quedará...
  • Page 21 Rack-Mounting the Switch Figure 9 Installing the switch in a 19-inch rack Mounting the Front Mount the front bracket as shown in Figure 10 and Figure 11. bracket Figure 10 Mount the front bracket to the device Screw Screw Front Front bracket bracket...
  • Page 22 2: I HAPTER NSTALLING THE WITCH Figure 12 Positions for screw mounting on the switch Three positions for screw mounting Three positions for screw mounting Follow the steps below to mount the rear bracket: 1 Use screws to fix the rear bracket to the rear mount angle. 2 Determine the position for screw mounting on the switch according to the position of the mount angle.

  • Page 23: Mounting The Switch On A Desktop

    Mounting the Switch on a Desktop Figure 14 Installation completed 2 Screw 2 Screw 2 Screw 1 Screw 1 Rear bracket Rear bracket Rear mount angle Rear mount angle Screw 1: Fix the rear bracket to the mount Screw 2 is mounted to the switch. angle.

  • Page 24: Connecting A Redundant Power Supply

    2: I HAPTER NSTALLING THE WITCH Table 6 PWR LED Colors Color State Green The Switch is powered-up and operating normally. The Switch has failed its Power On Self Test (POST). Yellow flashing Some ports have failed POST The Switch is not receiving power. * In this event you can still use the Switch using the remaining ports that have passed the POST.
  • Page 25 (or by connecting both). Ensure that the earth connection is made before connecting the DC supply from the RPS. 3Com switches that support -48V DC RPS inputs, and are PoE enabled, can only be powered by an RPS that complies with the isolation requirements of IEEE-Std 802.3af.
  • Page 26 AC mains power. 3Com’s RPS solution uses -48V DC power distribution. The RPS system provides bulk -48V DC power that is separately distributed to a number of network switches.
  • Page 27 Connecting a Redundant Power Supply Figure 15 shows how to connect the power supply to the RPS socket in the back of the switch. Use the cable tie supplied with your switch to support the cable in the back of the RPS connector as shown in Figure 15. Figure 15 RPS Connection to the Switch N U LL 0 V ;2 .0...

  • Page 28: Connecting Console Cable

    Ethernet cable does not require a separate power supply. If, for example, you use the switch to connect a 3Com 11 Mbps Wireless LAN Access Point 8500 to the network, then only a network cable is required to provide both power and network connectivity.
  • Page 29 Connecting Console Cable Table 9 Console cable pinouts RJ-45 Signal Direction DB9 (modem) DB9 (console) — — — — — — — — When you want to use the terminal to configure the switch, follow these steps to connect a terminal device to your switch using console cables: 1 Plug the DB-9 female connector of the Console cable to the serial port of the PC or terminal where the switch is to be configured.
  • Page 30 2: I HAPTER NSTALLING THE WITCH...

  • Page 31: Setting U P Switch Management

    ETTING WITCH ANAGEMENT To make full use of the features offered by your switch, and to change and monitor the way it works, you have to access the management software that resides on the switch. Managing the switch can help you to improve the efficiency of the switch and therefore the overall performance of your network.
  • Page 32 3: S HAPTER ETTING WITCH ANAGEMENT Figure 17 CLI Management using the Console Port Workstation Switch (with terminal emulation software installed) Console Port Connection Console Cable Figure 18 CLI Management over the Network Switch Workstation Connect over Network via Telnet Refer to “Setting Up Command Line Interface Management”...

  • Page 33: Setting Up Your Switch

    You can manage a switch using any network management workstation running the Simple Network Management Protocol (SNMP) as shown in Figure 20. For example, you can use the 3Com Network Director software, available from the 3Com website. For information on the 3Com’s network management tools, refer to Appendix D on page 69.
  • Page 34 How do you want to connect to the Switch? configured IP information? Connect to the con- Connect to a front panel port Use 3Com Network Connect to the console sole port and use the and use the Web Interface or Director (3ND).
  • Page 35 Setting Up Your Switch For most installations, 3Com recommends that you configure the switch IP information manually. This makes management simpler and more reliable as it is not dependent on a DHCP or BootP server, and eliminates the risk of the IP address changing.

  • Page 36: Manually Configuring Ip Information

    3: S HAPTER ETTING WITCH ANAGEMENT Manually Configuring You can manually configure the switch’s IP information by: IP Information Connecting a workstation to the switch’s console port using a console cable. ■ You can then manually enter the IP information using the command line interface (CLI).
  • Page 37 Manually Configuring IP Information 19,200 baud (bits per second) ■ 8 data bits ■ no parity ■ 1 stop bit ■ no hardware flow control ■ Refer to the documentation that accompanies the terminal emulation software for more information. 3 Power up the switch. The Power on Self Test (POST) run automatically. The Switch 4500G takes approximately one minute to boot.
  • Page 38 Figure 23 User View Login Starting..*********************************************************** * Switch 4500G 48-Port BOOTROM, Version 120 *********************************************************** Copyright (c) 2004-2007 3Com Corporation and its licensors. Creation date : Sep 5 2007, 14:07:22 CPU Clock Speed : 264MHz BUS Clock Speed : 33MHz Memory Size...
  • Page 39 Manually Configuring IP Information Username:admin Password: <4500G> %Apr 26 12:00:42:811 2000 4500G SHELL/4/LOGIN: admin login from aux0 <4500G> New diagram for Figure 28:**************************************************************** * All rights reserved (2004-2007) * Without the owner's prior written consent, * no decompiling or reverse-engineering shall be allowed. ***************************************************************** Login authentication Username:admin...
  • Page 40 3: S HAPTER ETTING WITCH ANAGEMENT You can now set up your chosen management method. See “Methods of Managing a Switch” on page 31. If you do not intend to use the command line interface using the console port to manage the switch, you can disconnect the serial cable and close the terminal emulator software.
  • Page 41 Manually Configuring IP Information Setting Up the Switch with IP Information You can now review or change the switch’s IP information. You can do this using the Web interface or the command line interface (CLI) using telnet. Using the Web Interface 1 Power-up the switch.

  • Page 42: Viewing Automatically Configured Ip Information

    IP information before you can begin to manage the Configured IP switch by: Information Using 3Com Network Director to auto-discover the switch and display the its ■ automatically allocated IP information. Connecting a workstation to the switch’s console port using a console cable, ■...
  • Page 43 DHCP or BootP server. If your network does not have a DHCP or BootP server, the workstation running 3Com Network Director must be on the same subnet as the switch, because Auto-IP addresses are non-routable. Connecting to the...

  • Page 44: Setting Up Command Line Interface Management

    3: S HAPTER ETTING WITCH ANAGEMENT If you do not intend to use the command line interface using the console port to manage the switch, you can logout, disconnect the serial cable and close the terminal emulator software. Setting Up Command This section describes how you can set up command line interface management Line Interface using a local console port connection or over the network.

  • Page 45: Setting Up Command Line Interface Management Using Ssh

    <4500G>, as shown in Figure 23 on page 38. Setting Up Command To set up command line interface management using SSH, refer to the chapter Line Interface entitled “SSH Terminal Service” in the “3Com® Switch 4500G Family Management using Configuration Guide.” Setting Up Web...

  • Page 46: Setting Up Snmp Management V1 Or V2

    1 (the Default VLAN). By default, all ports on the switch are in VLAN 1. You can use the 3Com Network Director application that is available from the 3Com website to provide SNMP management for your switch. If you use 3Com Network Director it automatically loads the correct MIBs and necessary files onto your workstation.

  • Page 47: Default Users And Passwords

    Default Users and Passwords can do this using the command line interface system management snmp community command. Refer to the command line interface section of the “SuperStack 4 Switch Command Reference Guide” for more information. SNMP V3 is on as default. All commands are in snmp menu in System View. Default Users and If you intend to manage the switch using the web interface or the command line Passwords...
  • Page 48 3: S HAPTER ETTING WITCH ANAGEMENT...

  • Page 49: Problem Solving

    If you experience a problem that is not listed here, it may be included in the Support section of the switch 4500G Command Reference Guide on the CD-ROM that accompanies your switch. For Technical Support information, see Appendix C “Obtaining Support for Your 3Com Products” on page 65.

  • Page 50: Solving Problems Indicated By Leds

    4: P HAPTER ROBLEM OLVING Solving Problems If the LEDs on the switch indicate a problem, refer to the list of suggested Indicated by LEDs solutions below. The PWR LED does not light Check that the power cable is firmly connected to the switch and to the supply outlet.

  • Page 51: Solving Hardware Problems

    3 Power cycle the unit. To do this, remove and reconnect the AC mains supply. If another fan failure warning message is generated using the Command Line Interface or the Web interface, return the unit to 3Com. Unit fails, no SNMP fan failure message is received 1 Power cycle the unit.

  • Page 52: Solving Communication Problems

    The switch has identified that the SFP does not meet the minimum requirements for the switch and has disabled the port. To correct this problem, completely remove the SFP and replace it with a 3Com approved SFP. Error message indicating that the SFP transceiver is faulty To correct this problem, completely remove the SFP and then reinsert it.

  • Page 53: Solving Fabric Formation Problems

    Solving Fabric Formation Problems another device on your network. 3Com suggests you use addresses in the range 192.168.0.0 to 192.168.255.255 with a subnet mask of 255.255.255.0. These suggested IP addresses are part of a group of IP addresses that have been set aside specially for use ‘in house’...
  • Page 54 4: P HAPTER ROBLEM OLVING...

  • Page 55: Null Modem Cable

    OUTS Null Modem Cable RJ-45 to RS-232 25-pin Switch 5500 PC/Terminal Cable connector: RJ-45 female Cable connector: 25-pin male/female only required if screen Screen Shell Screen always required Ground Ground required for handshake PC-AT Serial Cable RJ-45 to 9-pin Switch 5500 PC-AT Serial Port Cable connector: RJ-45 female Cable connector: 9-pin female...

  • Page 56: Modem Cable

    A: P PPENDIX OUTS Modem Cable RJ-45 to RS-232 25-pin Switch 5500 RS-232 Modem Port Cable connector: RJ-45 female Cable connector: 25-pin male Screen Shell Screen Ground Ground Ethernet Port RJ-45 10/100 and 1000BASE-T RJ-45 connections. Pin Assignments Table 10 Pin assignments Pin Number 10/100 1000...
  • Page 57 Ethernet Port RJ-45 Pin Assignments Table 11 Pin assignments Pin Number 10/100 1000 Ports configured as MDIX Receive Data + Bidirectional Data B+ Receive Data − Bidirectional Data B− Transmit Data + Bidirectional Data A+ Not assigned Bidirectional Data A− Not assigned Bidirectional Data D+ Transmit Data −...
  • Page 58 A: P PPENDIX OUTS...

  • Page 59: Specifications

    −10 ° to +70 °C (14 ° to 158 °F) Storage Temperature Operating Humidity 95% non-condensing Standards EN60068 to 3Com schedule (Package testing: paras 2.1, 2.2, 2.30, and 2.32. Operational testing: paras 2.1, 2.2, 2.30 and 2.13). Safety Agency Certifications UL 60950-1, EN 60950-1, CSA 22.2 No.

  • Page 60: Switch 4500G 48-Port

    −10 ° to +70 °C (14 ° to 158 °F) Storage Temperature Operating Humidity 95% non-condensing Standards EN60068 to 3Com schedule (Package testing: paras 2.1, 2.2, 2.30, and 2.32. Operational testing: paras 2.1, 2.2, 2.30 and 2.13). Safety Agency Certifications UL 60950-1, EN 60950-1, CSA 22.2 No.

  • Page 61: Switch 4500G Pwr 24-Port

    −10 ° to +70 °C (14 ° to 158 °F) Storage Temperature Operating Humidity 95% non-condensing Standards EN60068 to 3Com schedule (Package testing: paras 2.1, 2.2, 2.30, and 2.32. Operational testing: paras 2.1, 2.2, 2.30 and 2.13). Safety Agency Certifications UL 60950-1, EN 60950-1, CSA 22.2 No.

  • Page 62: Witch 4500G Pwr 48-Port

    −10 ° to +70 °C (14 ° to 158 °F) Storage Temperature Operating Humidity 95% non-condensing Standards EN60068 to 3Com schedule (Package testing: paras 2.1, 2.2, 2.30, and 2.32. Operational testing: paras 2.1, 2.2, 2.30 and 2.13). Safety Agency Certifications UL 60950-1, EN 60950-1, CSA 22.2 No.

  • Page 63: Grounding Lead

    Grounding Lead Grounding Lead Safety Requirements The Grounding Cable (in PWR Units only) shall comply with the following safety standards: UL Subject 758, UL 1581 and CSA C22.2 No. 210 UL VW-1 and CSA FT1 Vertical Flame Test Voltage Rating 600V Insulation Thickness 0.4mm...
  • Page 64 B: T PPENDIX ECHNICAL PECIFICATIONS...

  • Page 65: Upport For

    To take advantage of warranty and other service benefits, you must first Product to Gain register your product at: Service Benefits http://eSupport.3com.com/ 3Com eSupport services are based on accounts that are created or that you are authorized to access. Solve Problems 3Com offers the following support tool: Online 3Com Knowledgebase —...

  • Page 66: Access Software Downloads

    3Com as a separately ordered product. Separately orderable software releases and licenses are listed in the 3Com Price List and are available for purchase from your 3Com reseller.
  • Page 67 Details about recent configuration changes, if applicable ■ To send a product directly to 3Com for repair, you must first obtain a return materials 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...
  • Page 68 Latin America — Telephone Technical Support and Repair Antigua 1 800 988 2112 Guatemala AT&T +800 998 2112 Argentina 0 810 444 3COM Haiti 57 1 657 0888 Aruba 1 800 998 2112 Honduras AT&T +800 998 2112 Bahamas...

  • Page 69: Om Network Management

    3NS is configured with intelligent defaults and the ability to detect network configuration problems. It can also offer optimization suggestions, making this application ideal for network managers with all levels of experience. To find out more about 3Com Network Supervisor and to download a trial version, go to: www.3com.com/3ns...

  • Page 70: 3Com Network Director

    By using 3ND you can discover, map, and monitor all your 3Com devices on the network. It simplifies tasks such as backup and restore for 3Com device configurations as well as firmware and agent upgrades.

  • Page 71: 3Com Enterprise Management Suite

    The client-server offering operates on Windows and UNIX (Linux and Solaris) systems. 3Com EMS is available in four packages, varying in the maximum number of devices actively managed. These include SNMP-capable devices such as switches, routers, security switches, the 3Com VCX™ IP Telephony server,...
  • Page 72 D: 3C PPENDIX ETWORK ANAGEMENT...

  • Page 73: Edundant Ower Supply Safety Information

    EDUNDANT OWER UPPLY AFETY NFORMATION Important Safety Information WARNING: This device has more than one power input. Disconnect all power inputs to power off this device. WARNING: The installation of the Redundant Power Supply (RPS) should only be carried out by properly trained and qualified personnel. WARNING: These instructions must be read in conjunction with the RPS flyer and the safety and installation instructions supplied with your RPS.

  • Page 74: L'information De Sécurité Importante

    WARNING: Do not use a standard 'positive-earthed' -48V redundant power system suitable for use with telecommunications equipment with the 3Com Power-over-Ethernet (PoE) network switches. In order to meet the IEEE 802.3af (PoE) specification, the -48V output must be isolated from earth (ground) and meet the isolation requirements in that specification.

  • Page 75: Wichtige Sicherheitsinformationen

    à 48 V relié à la terre convenant aux équipements de télécommunication avec les commutateurs réseau PoE (Power-Over-Ethernet) de 3Com. En vue de respecter la spécification IEEE 802.3af (PoE), la sortie 48 V doit être isolée de la terre (masse) et se conformer aux exigences d’isolation de cette spécification.

  • Page 76: Información De Seguridad Importante

    Klemme am Switch an die negative (gemeinsame) Klemme der RPS angeschlossen wird. VORSICHT: Stellen Sie sicher, dass sich der Schutzschalter an der RPS beim Anschließen des RPS-Kabels und des Steckers des 3Com Switch in der geöffneten Stellung (Aus) befindet. VORSICHT: Verwenden Sie mit den 3Com PoE-Netzwerkswitches kein "positiv geerdetes"...
  • Page 77 -48 V con conexión a tierra positiva, adecuado para su uso con equipos de telecomunicaciones, con los conmutadores de red alimentados a través de Ethernet (PoE) de 3Com. Para cumplir con la especificación IEEE 802.3af (PoE), la salida de -48V debe estar aislada de la de tierra y cumplir con los requisitos de aislamiento de dicha especificacion.

  • Page 78: Importanti Informazioni Di Sicurezza

    (salvavita) dell'RPS. AVVERTENZA: prima di collegare il cavo RPS e il connettore allo switch 3Com, verificare che il salvavita si trovi in posizione Acceso (spento). AVVERTENZA: Non usare con gli switch di rete PoE...

  • Page 79: Wa¿Ne Informacje O Zabezpieczeniach

    Wa¿ne informacje o zabezpieczeniach standard con 'messa a terra positiva' a -48 V normalmente usati con gli apparecchi di telecomunicazione. Per soddisfare lo standard IEEE 802.3af (PoE), l'uscita a -48V deve essere isolata da terra e soddisfare i requisiti d'isolamento per quello standard. Ważne informacje o zabezpieczeniach OSTRZEŻENIE: To urządzenie ma kilka punktów podłączenia zasilania.
  • Page 80 -48-woltowego nadmiarowego systemu zasilania odpowiedniego przy użyciu ze sprzętem telekomunikacyjnym wraz z przełącznikami siecio- wymi firmy 3Com w technologii Power-over-Ethernet (PoE). Aby spełnić wymagania specyfikacji IEEE 802.3af (PoE), -48-woltowy przewodnik wyjścia musi być odizolowany od ziemi (uziomu) i spełnił wymagania...

  • Page 81: Regulatory Notices

    A copy of the signed Declaration of Conformity can be downloaded from the Product Support web page for the Switch 4210 Product Family at http://www.3com.com. Also available at http://support.3com.com/doc/Switch_4210_EU_DOC.pdf.
  • Page 82 E: R PPENDIX EDUNDANT OWER UPPLY AFETY NFORMATION...

This manual is also suitable for:

4500g 24-port4500g 48-port4500g pwr 24-port4500g pwr 48-port

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