3Com 3C16475BS Скачать руководство пользователя

Страница: 1 / 77

http://www.3com.com/

Baseline Switch 2226-PWR Plus
(3C16490) User Guide

Firmware Version 1.1.0.7

Part No. DUA1649-0AAA02

Published January 2005

Содержание 3C16475BS

Страница 1: ...http www 3com com Baseline Switch 2226 PWR Plus 3C16490 User Guide Firmware Version 1 1 0 7 Part No DUA1649 0AAA02 Published January 2005 ...

Страница 2: ...95 or FAR 52 227 14 June 1987 whichever is applicable You agree not to remove or deface any portion of any legend provided on any licensed program or documentation contained in or delivered to you in conjunction with this User Guide Unless otherwise indicated 3Com registered trademarks are registered in the United States and may or may not be registered in other countries 3Com and the 3Com logo ar...

Страница 3: ...itch 17 Checking for Correct Operation 18 Connecting a Network Device 18 Using SFP Transceivers 19 Approved SFP Transceivers 19 Inserting an SFP Transceiver 19 Removing an SFP Transceiver 20 Performing Spot Checks 20 3 CONNECTING TO THE WEB INTERFACE Requirements for Accessing the Web Interface 23 Running the Discovery Application 23 Logging On to the Web Interface 24 Navigating the Web Interface ...

Страница 4: ...pdates 48 Performing Firmware Upgrade 49 6 TROUBLESHOOTING Resetting to Factory Defaults 51 Forgotten Password 52 Forgotten Static IP Address 52 Solving LED Issues 52 Solving Power Issues 53 Solving Corrupted Firmware 54 If the Problem Persists 54 A OBTAINING SUPPORT FOR YOUR PRODUCT Register Your Product 55 Purchase Value Added Services 55 Troubleshoot Online 55 Access Software Downloads 55 Telep...

Страница 5: ...e Type Description Information note Information that describes important features or instructions Caution Information that alerts you to potential loss of data or potential damage to an application system or device Warning Information that alerts you to potential personal injury Table 2 Text Conventions Convention Description Screen displays This typeface represents information as it appears on th...

Страница 6: ...ons are very important to us They will help make our documentation more useful to you Please e mail comments about this document to 3Com at pddtechpubs_comments 3com com Please include the following information when con tacting us Document title Document part number on the title page Page number if appropriate Example 3Com Baseline Switch 2226 PWR Plus User Guide Part number DUA1649 0AAA02 Page 25...

Страница 7: ...junction with two Small Form Factor Pluggable SFP trans ceiver slots on the front panel for easy flexible con nection to fiber based Gigabit media While there are four physical Gigabit ports only a maximum of two can be operational at any given time Autosensing of MDI MDIX Connections All ports on the Switch can autosense both medium dependent interface MDI and medium dependent interface crossover...

Страница 8: ...d by the Switch during its initialization do not connect any data source through the phone until the phone has finished its startup sequence Once the phone is available for use any data source for example a computer can then be connected to the phone s pass through port This only applies if you use a single wall jack for your network connec tion and use the pass through LAN port on the NBX phone T...

Страница 9: ...ghts LEDs that help describe the state of vari ous networking and connection operations 1 PoE LEDs These LEDs show whether individual ports are provid ing power 2 24 RJ 45 Ports WARNING RJ 45 Ports These are shielded RJ 45 data sockets They cannot be used as standard tradi tional telephone sockets or to connect the unit to a traditional PBX or public telephone network Only connect RJ 45 data conne...

Страница 10: ...ecte sólo conectores de datos RJ 45 sistemas de telefonía de red local o teléfonos de red local a estas tomas Es posible conectar cables de datos blindados o sin blin dar con clavijas blindadas o sin blindar a estos conec tores de datos AVVERTENZA Le porte RJ 45 Sono prese dati RJ 45 schermate Non è pertanto possibile utilizzarle come normali prese telefoniche né per collegare l unità a un PBX Pri...

Страница 11: ...ve the associated RJ 45 port of the same number is disabled The 1000BASE T RJ 45 ports support automatic MDI MDI X operation so you can use straight through or crossover cables for all network connections to workstations or servers or to other switches or hubs Status Meaning Green Fiber SFP is inserted in the slot Off No fiber SFP is inserted in the slot Status Meaning Green The link is operating ...

Страница 12: ...ied with four self adhesive rubber pads Do not apply the pads if you intend to rack mount the unit If the unit is to be part of a free standing stack apply the pads to each marked corner area on the under side of the unit Place the unit on top of the lower unit ensuring that the pads locate with the recesses of the lower unit Rear Panel 9 Power Supply The Switch automatically adjusts to the supply...

Страница 13: ...6 PWR Plus unit One power cord Four standard height self adhesive rubber pads One mounting kit One CD ROM which contains this User Guide the 3Com Discovery application and the 3Com TFTP Server One warranty flyer Before installing and using the Switch verify that your Switch package has all these items If any of the above items are damaged or missing contact your 3Com network supplier immediately ...

Страница 14: ...14 CHAPTER 1 INTRODUCING THE BASELINE SWITCH ...

Страница 15: ...witch hinzufuegen oder Instandhaltungsarbe iten verrichten lesen Sie die Sicherheitsanweisungen die in Anhang B Appendix B in diesem Handbuch aufgefuehrt sind ADVERTENCIA Información de Seguridad Antes de instalar o extraer cualquier componente del prod uct o de realizar tareas de mantenimiento debe leer la información de seguridad facilitada en el Apéndice B Appendix B de esta guía del usuario AV...

Страница 16: ...eliability problems in your equip ment Rack Mounting or Free Standing The unit can be mounted in a 19 inch equipment rack using the supplied mounting kit see Using the Mounting Kit on page 16 or it can be free stand ing Do not place objects on top of the unit or stack CAUTION If installing the Switch in a free standing stack of different size Baseline or SuperStack 3 units the smaller units must b...

Страница 17: ... with the recesses of the lower unit Supplying Power to the Switch Power problems can be the cause of serious failures and downtime in your network Ensure that the power input to your system is clean and free from sags and surges to avoid unforeseen network out ages 3Com recommends that you install power con ditioning especially in areas prone to black outs power dips and electrical storms The uni...

Страница 18: ...g the Switch to its factory defaults erases all your settings You will need to reconfigure the Switch after you reset it If these do not resolve the issue Check the 3Com Knowledgebase for a solution To visit the 3Com Knowledgebase Web site start your Web browser and then enter http knowledgebase 3com com Contact your 3Com network supplier for assis tance Connecting a Network Device To connect a ne...

Страница 19: ...If you insert an SFP transceiver that is not supported the Switch will not recognize it Inserting an SFP Transceiver To be recognized as valid the SFP transceiver must be one of the following 1000BASE SX SFP transceiver Use this transceiver to connect the Switch directly to a multimedia fiber optic cable 1000BASE LX SFP transceiver Use this transceiver to connect the Switch directly to a single mo...

Страница 20: ...ble to a device fitted with an appropriate Gigabit Ethernet connection 7 Check the Module Active LEDs on the front of the Switch to ensure that it is operating correctly Removing an SFP Transceiver Removing an SFP transceiver does not require power ing off the Switch To remove an SFP transceiver 1 Disconnect the cable from the transceiver 2 Move the wire release lever downwards until it is pointin...

Страница 21: ...to Troubleshooting starting on page 51 Item Verify That Cabling All external cabling connections are secure and that no cables are pulled taut Cooling fan Where possible check that the cooling fan is operating by listening to the unit The fan is fitted on the right side of the unit when viewed from the front ...

Страница 22: ...22 CHAPTER 2 INSTALLING THE SWITCH ...

Страница 23: ...ry Application Logging On to the Web Interface Navigating the Web Interface Requirements for Accessing the Web Interface To connect to the Web interface you need the fol lowing The Discovery application which is included on 3Com Baseline Switch 2226 PWR Plus CD ROM that is supplied with your Switch A computer that is connected to the Switch and that has a Web browser Running the Discovery Applicat...

Страница 24: ...overed Devices screen displays detected network devices Figure 6 Discovered Devices Screen 3 On the Discovered Devices screen click Baseline Switch 2226 PWR Plus and then click Next The Completing the 3Com Discovery Application screen appears 4 Click Finish The Web interface loads in your Web browser Logging On to the Web Interface After the Web interface loads in your Web browser the first page t...

Страница 25: ...s and view information about the Switch Menu The menu is located on the left side of the Web inter face When you click an item on the menu the related screen appears in the main part of the inter face Figure 8 Switch Screen Layout Table 6 lists the available items on the menu Table 6 Available Menu Items Menu Item Description Status Provides a summary of the Switch s basic settings and versions of...

Страница 26: ...ne the IP address that the Switch will assign to itself during auto IP configuration check the sticker on the base of the Switch This sticker contains the MAC address and default IP address of the Switch Port Configuration Allows you to configure the Switch s port settings VLANs Allows you to create VLAN groups add port members and specify how VLAN tagging is used Link Aggregation Allows you to se...

Страница 27: ...xample if the DHCP server assigned the IP address 192 168 0 123 to the Switch start your Web browser and then type http 192 168 0 123 Manually Assigned Static IP Address If you assigned a static IP address to the Switch you need to use that IP address to access the Web inter face the next time you want to configure the Switch For example if you assigned the Switch the IP address 192 168 0 123 star...

Страница 28: ...28 CHAPTER 3 CONNECTING TO THE WEB INTERFACE ...

Страница 29: ...witch to function as a basic layer 2 switch you do not need to access the Web interface and config ure the Switch You only need to access the Web interface if you want to Set the administration password to the Web inter face Assign an IP address to the Switch Configure the Switch s advanced features Upgrade the firmware Viewing Status Information The Status screen which automatically loads after y...

Страница 30: ...password 1 On the menu click Password The Change Adminis tration Password screen appears 2 In Old Password type your current password By default the Switch does not have any password If this is your first time to access this screen or if you Item Description Firmware Version Displays the version of the firmware that is currently installed on the Switch DHCP Client Shows Enable if the Switch obtain...

Страница 31: ...cally uses the default IP address 169 254 x y where x and y are the last two bytes of its MAC address To determine the exact IP address that the Switch assigns to itself during auto IP configuration check the sticker on the base of the Switch This sticker con tains the MAC address and default IP address of the Switch To detect its IP information using the automatic con figuration process the Switc...

Страница 32: ...s IP address Available options include DHCP Select this option if you have a DHCP server on the network and you want the Switch to automatically obtain an IP address from it Static Select this option if you want to manually assign an IP address to the Switch IP Address Specify an IP address that you want to assign to the Switch This option is only available if IP Address Mode is set to Static The ...

Страница 33: ...d Autonegotiation is enabled Flow control is enabled All ports are set to priority zero Item Description Port The physical number of the port that corre sponds to the numbering of the ports on the front of the unit Note that ports 25 and 26 are dual function ports When the Small Form Factor Pluggable SFP trans ceiver ports are not in use the number refers to the RJ 45 port When an SFP module is in...

Страница 34: ...ars as shown in Figure 13 Figure 13 Port Settings Screen 2 Configure the port settings Available options are listed in Table 10 Table 10 Port Setting Options Option Description Status Enable Activates the port Disable Shuts down or disables the port By default admin setting is set to enable Auto Negotiate Autonegotiation which is enabled by default sets the optimum combination of speed and duplex ...

Страница 35: ...gs of ports that are members of a trunk or aggregated link Supported SFP transceivers only operate at 1000Mbps full duplex Inserting an SFP transceiver into a gigabit port disables the corresponding RJ 45 port even if no fiber cable is inserted Configuring VLANs You can use the Switch to create VLANs to organize any group of ports into separate broadcast domains VLANs confine broadcast traffic to ...

Страница 36: ...the VLANs on the switch is automatically forwarded to the uplink port or ports By default all ports belong to VLAN 1 CAUTION At least one port must always be a member of VLAN 1 the management VLAN If you choose to connect all ports to VLANs other than VLAN 1 you will no longer be able to access the Web interface If this happens you will need to reset the Switch to factory settings To create a VLAN...

Страница 37: ...1 Create a new VLAN and set the VLAN ID to 2 Refer to Creating a VLAN for instructions VLAN1 is the default VLAN and already exists 2 Set ports 7 8 and 16 to D desktop egress packet 3 Click Apply Ports 7 8 and 16 now belong to VLAN2 and will not be able communicate with any other ports unless you add another port to the VLAN or change the port configuration Setting Up VLAN Across Two Switches This...

Страница 38: ... those ports on Switch 2 that are members of VLAN2 Removing a VLAN To remove an existing VLAN 1 In the VLAN ID list select the VLAN ID that you want to delete 2 Click Remove The VLANs page refreshes and the VLAN ID that you deleted disappears from the VLAN ID list Configuring Link Aggregation Link aggregation also called port trunking refers to bonding multiple ports into a single group to effec t...

Страница 39: ...6 can only use the fixed RJ45 10 100 1000 ports SFP ports cannot be aggregated If a port is a member of an aggregated link or trunk you will not be able to configure its individual port settings All member ports of an aggregated link will have the same settings and you can configure these by clicking the AL link on the Port Configuration screen See Configuring Trunk Settings on page 40 Adding Port...

Страница 40: ...19 Port Settings Screen 3 Configure the status autonegotiation speed duplex and flow control settings of the trunk as you would configure an individual port see available options in Table 10 Note however that these settings will be applied to all members of the trunk 4 Click Apply to save your changes Configuring PoE Using the PoE Configuration screen you can enable or disable PoE on all ports or ...

Страница 41: ...er Ether net on all ports There are two available options for this setting Enable Select to enable the Switch to supply PoE on all ports Disable Select to disable PoE on all ports To enable or disable power for individual ports you need access the PoE Setting screen For more information refer to Configuring PoE for Individual Ports on page 41 Shutdown Power Method If the power budget is exceeded t...

Страница 42: ...plying Power over Ethernet to lower pri ority ports Set the PoE priority for the port by selecting one of the following options Low least important High default Critical most important For ports with the same priority ports connected to the lowest physical port number will have priority over those connected to higher port numbers For example port 3 will have a higher prior ity than port 5 providin...

Страница 43: ...he Switch needs to remove power from a device it will remove power from the highest numbered port When the Switch is power cycled it will supply power to the ports starting with the lowest numbered port first Implementing a Power Plan If the total power required by your PoE devices is less than the Switch s power budget then you can guar antee power to every port If the total power required by you...

Страница 44: ...n the Statistics screen for individual ports are not updated in real time To view the latest statistics for the port click Refresh Monitoring Traffic The Switch allows you to monitor traffic going in and out of a particular port For traffic monitoring to work you need to attach a network analyzer to one port and use it to monitor the traffic of other ports in the stack To set up traffic monitoring...

Страница 45: ...m click the port number that you want to monitor Only one port can be selected from the Mirror Form row which means that you can only monitor one port at any given time 5 In Mirror To click the port number to which the port analyzer is connected Traffic to and from the port selected in Mirror From will be forwarded to this port 6 Click Apply For information on how to interpret the output on the po...

Страница 46: ...tected Phones This section displays the MAC addresses of IP phones that are detected and given priority by the Switch To display a phone that is connected to a port select the port from the drop down list Option Description Enable NBX Phone Pri oritization Select to automatically detect and prioritize traffic from all NBX phones that are connected to the Switch By default this option is selected E...

Страница 47: ... security features such as directory listings password protection and user authentication You can install the 3Com TFTP Server on the follow ing Windows platforms Windows XP Professional Home Edition Windows 2000 Advanced Server Server Profes sional Windows Me Windows 98 SE Windows 95 95b Windows NT 4 0 3 51 The 3Com TFTP Server is also available for download on the 3Com Web site www 3com com To i...

Страница 48: ...m folder The 3Com TFTP Server interface appears 2 On the Options menu click Options The Options screen appears 3 In Upload download directory type the full path to the directory where you intend to copy the firmware updates For example you can type C TFTP as in the example in Figure 26 Alternatively click Browse Directories and then select a folder from the directory tree Figure 26 Options Screen ...

Страница 49: ...he Switch to fetch the upgrade files successfully this program needs to be running 2 On the same computer access and log on to the Web interface 3 On the menu click Upgrade The System Upgrade screen appears 4 Take note of the version number in Current Firmware Version You will need this information to verify that the upgrade was successfully completed 5 In TFTP Server IP type the IP address of the...

Страница 50: ...tus Column Indicates When Upgrade is Complete To verify that the upgrade was successful access the Web interface and then go to the System Upgrade screen The Current Firmware Version should show the version of the firmware that you have just installed ...

Страница 51: ...erases all your settings You will need to reconfigure the Switch after you reset it To reset the Switch to its factory defaults 1 Using the tip of a pen or a similar object press the Recovery button on the rear panel of the Switch See Figure 1 for illustration 2 Power off the Switch and then power it back on while keeping the Recovery button pressed 3 Release the Recovery button 4 Reset the Switch...

Страница 52: ...ic LED checks refer to the following topics in Chapter 1 1 PoE LEDs 3 Module Active LEDs 4 Link Activity LEDs 6 Power LED 7 Duplex LEDs A link is connected but the Link Activity LED for the port is off There is a problem with this connection Verify that The device being connected to is powered on and operating correctly The cable is connected at both ends The cable is not damaged If the connection...

Страница 53: ...on enabled or The ports are configured for half duplex operation All ports appear to show continual activity There may be broadcast storms on the network Remove port connections one at a time waiting a few seconds between each port If the LEDs go off after removing a port connection the device that was connected to that port is introducing an excessive amount of broadcast frames to the network Som...

Страница 54: ...are using ports 1 to 24 Solving Corrupted Firmware If the firmware becomes corrupted you must either Upgrade the firmware for the Switch Reset the Switch to factory defaults When the firmware is corrupted the Switch automat ically goes into Fail Safe mode To upgrade a corrupted firmware 1 Download the latest firmware from the 3Com Web site to the computer that you are using to access the Web inter...

Страница 55: ...ftware upgrades onsite assistance or advance hardware replacement Experienced engineers are available to manage your installation with minimal disruption to your network Expert assessment and implementation services are offered to fill resource gaps and ensure the success of your networking projects More information on 3Com maintenance and Professional Services is available at http www 3com com Co...

Страница 56: ...t number and serial number Proof of purchase if you have not pre registered your product A list of system hardware and software including revision level Diagnostic error messages Details about recent configuration changes if applicable 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 ma...

Страница 57: ... 6348 Europe Middle East and Africa Telephone Technical Support and Repair From anywhere in these regions call 44 0 1442 435529 From the following countries you may use the numbers shown Austria Belgium Denmark Finland France Germany Hungary Ireland Israel Italy Luxembourg Netherlands Norway Poland Portugal South Africa Spain Sweden Switzerland U K 01 7956 7124 070 700 770 7010 7289 01080 2783 082...

Страница 58: ... 800 998 2112 1 800 998 2112 AT T 800 998 2112 AT T 800 998 2112 AT T 800 998 2112 57 1 657 0888 AT T 800 998 2112 1 800 998 2112 571 657 0888 01 800 849CARE AT T 800 998 2112 AT T 800 998 2112 54 11 4894 1888 AT T 800 998 2112 1 800 998 2112 AT T 800 998 2112 1 800 998 2112 AT T 800 998 2112 AT T 800 998 2112 57 1 657 0888 Country Telephone Number You can also obtain support in this region using ...

Страница 59: ...ARNING This unit operates under SELV Safety Extra Low Voltage conditions according to IEC 60 The conditions are only maintained if the equipment to which it is connected also operates under SELV conditions WARNING France and Peru only This unit cannot be powered from IT supplies If your supplies are of IT type this unit must be powered by 230 V 2P T via an isolation transformer ratio 1 1 with the ...

Страница 60: ...un branche ment sur une entrée d appareil EN60320 IEC 320 AVERTISSEMENT La prise secteur doit se trouver à proximité de l appareil et son accès doit être facile Vous ne pouvez mettre l appareil hors circuit qu en débranchant son cordon électrique au niveau de cette prise AVERTISSEMENT L appareil fonctionne à une ten sion extrêmement basse de sécurité qui est conforme à la norme IEC60950 Ces condit...

Страница 61: ... oder Switche gestapelt werden soll müssen grössere Geräte unter den schmaleren Hubs eingebaut werden WARNUNG Das Gerät muß an eine geerdete Steck dose angeschlossen werden welche die internation alen Sicherheitsnormen erfüllt WARNUNG Der Gerätestecker der Anschluß an das Gerät nicht der Wandsteckdosenstecker muß einen gemäß EN 60320 IEC 320 konfigurierten Geräteein gang haben Etats Unis et Canada...

Страница 62: ...y retirada de la unidad sólo debe llevarla a cabo personal cualificado ADVERTENCIA La unidad debe estar conectada a tierra para garantizar el cumplimiento de las normas de seguridad ADVERTENCIA El acoplador del equipo el conector para la unidad y no la toma de la pared debe tener una configuración que se adapte a una entrada del equipo EN60320 IEC320 ADVERTENCIA El enchufe debe estar cerca de la u...

Страница 63: ... fibra óptica ni a los extremos del cable de fibra óptica mientras estén conectados EE UU y Canadá El conjunto de cables debe estar homologado por UL y tener la certificación CSA La especificación mínima del cable flexible es Nº 18 AWG Tipo SV o SJ Tres conductores El conjunto de cables debe tener una capacidad de corriente nominal de al menos 10 A El enchufe de conexión debe ser de tipo de toma d...

Страница 64: ...A Solo per Francia e Perù Questa unità non può ricevere alimentazione di tipo IT Se l alimentazione è di tipo IT l unità deve essere alimentata a 230 V 2P T tramite un trasformatore di isolamento con rapporto 1 1 con il punto di collega mento secondario contrassegnato come Neutro col legato direttamente a terra Impédance à la terre AVVERTENZA Set dei cavi di alimentazione Deve essere approvato per...

Страница 65: ...on connet tori schermati o non schermati AVVERTENZA porte a fibre ottiche protezione degli occhi Non guardare mai il LED di trasmissione attraverso uno strumento ottico di ingrandimento quando è acceso Non guardare mai direttamente la porta TX a fibre ottiche e le estremità del cavo a fibre ottiche quando sono accese AVVERTENZA L esecuzione di procedure o regolazi oni non previste dalle istruzioni...

Страница 66: ...66 APPENDIX B SAFETY INFORMATION ...

Страница 67: ... MAC Address 4096 Safety UL 60950 1 CAS 60950 1 CSA CUS IEC 60950 1 CE EN 60950 1 TÜV GS EMC Emissions EN 55022 Class A FCC Part 15 Subpart B Class A ICES 003 Class A VCCI Class A Immunity EN 55024 Operating Temperature 0 45 C 32 113 F Humidity 10 95 non condensing Standard EN 60068 IEC 68 various parts Width 440 mm 17 3 in Length 235 mm 9 2 in Height 43 6 mm 1 75 in or 1U Weight 3 2 kg 7 6 lb Mou...

Страница 68: ...68 APPENDIX C TECHNICAL INFORMATION ...

Страница 69: ...lf duplex Autonegotiation is defined in the IEEE 802 3 standard for Ethernet and is an opera tion that takes place in a few milliseconds Autonego tiation must be enabled for the 1000BASE T ports to operate at 1000 Mbps full duplex bandwidth The information capacity measured in bits per sec ond that a channel can transmit The bandwidth of Ethernet is 10 Mbps the bandwidth of Fast Ethernet is 100 Mb...

Страница 70: ... NT Server Ethernet A LAN specification developed jointly by Xerox Intel and Digital Equipment Corporation Ethernet net works use CSMA CD to transmit packets at a rate of 10 Mbps and 100 Mbps over a variety of cables Ethernet address See MAC address Fast Ethernet An Ethernet system that is designed to operate at 100 Mbps Gigabit Ethernet An Ethernet system that is designed to operate at 1000 Mbps ...

Страница 71: ...ber IP Address Internet Protocol Address A unique identifier for a device attached to a network using TCP IP The address is written as four octets separated with peri ods full stops and is made up of a network section an optional subnet section and a host section LAN Local Area Network A network of end stations such as PCs printers servers and network devices hubs and switches that cover a relativ...

Страница 72: ... of various types of fiber optic and copper based transceivers into the host equipment subnet address An extension of the IP addressing scheme that allows a site to use a single IP network address for multiple physical networks subnet mask A subnet mask which may be a part of the TCP IP information provided by your ISP is a set of four numbers configured like an IP address It is used to create IP ...

Страница 73: ... by attaching a network analyzer to one switch port in order to mon itor the traffic of other ports on the Switch trunking A method which specifies how to create a single high speed logical link that combines several lower speed physical links VLAN Virtual LAN A collection of network nodes that share the same collision domain regardless of their physical location or connection point in the network...

Страница 74: ...74 GLOSSARY ...

Страница 75: ... 54 Fast Ethernet 70 firmware checking for updates 48 downloading updates 48 upgrading 47 firmware upgrade performing 49 verifying 50 flow control 35 forgotten IP address 52 forgotten password 52 free standing 16 front panel Duplex LEDs 12 Link Activity LEDs 11 Module Active LEDs 11 PoE LEDs 9 Power LED 12 RJ 45 ports 9 self adhesive pads 12 SFP ports 11 full duplex 70 G Gigabit Ethernet 70 H half...

Страница 76: ...ety information German 62 server defined 72 SFP ports 8 11 SFP transceivers 19 approved supported 19 inserting 19 removing 20 speed duplex 35 spot checks 20 subnet mask 72 switch defined 72 T TCP IP 71 defined 72 TFTP server See 3CSom TFTP Server traffic 73 monitoring 44 setting the priority 45 traffic prioritization 8 45 IP phones 8 priority queuing 8 traffic priority levels 9 troubleshooting 51 ...

Страница 77: ...ures Reorient the receiving antenna Relocate the equipment with respect to the receiver Move the equipment away from the receiver Plug the equipment into a different outlet so that equipment and receiver are on different branch circuits If necessary the user should consult the dealer or an experienced radio television technician for additional suggestions The user may find the following booklet pr...

Результаты поиска

Содержание 3C16475BS

Отзывы:

Похожие инструкции для 3C16475BS

Бренды по названию

Популярные бренды

3Com 3C16475BS, Руководство пользователя

Результаты поиска

Содержание 3C16475BS

Отзывы:

Похожие инструкции для 3C16475BS

Бренды по названию

Популярные бренды