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http://www.3com.com/ Baseline Switch 2250 Plus User Guide Installationsanleitung 3C16476CS Part No. 10015237 Rev . AA Published August 2006 ...
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3Com Corporation • 350 Camp us Driv e • Marlborough • MA USA 01752-3064 Copyright © 2006, 3Com Corporation. All rights reserved. No part of this documentation may be repr oduced in any form or by any means or used to make any derivative wor k (such as translation, transformation, or adaptation) without wr itten permission from 3Com Corporati ...
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C ONTENTS A BOUT T HIS G UIDE Conventions 5 Related Documentation 6 Documentation Comments 6 1 I NTRO DUCING THE B ASELINE S WITCH Overview of the Baseline Switch 2250 Plus 7 Features and Capabilities 7 Autosensing of MDI/MDIX Connections 7 Autonegotiating 10/100 Mbps Ports 7 SFP Ports 8 T raffic Prioritization 8 Forwarding of BPDU Packets 8 Physic ...
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Backup Configuration 30 Restore Configuration 30 Firmware Upgrade 31 Initialize 31 Reboot 32 System Access 32 System Time 34 SNMP 34 Configuring VLANs 35 VLAN 36 Forwarding T agged/Untagged Frames 39 Sample VLAN Configurations 40 Spanning T r ee 4 1 IGMP Snooping 42 IGMP Query 42 Broadcast Storm 43 Configuring Port Setti ngs 43 Administration 43 Sp ...
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A BOUT T HIS G UIDE This guide describes how to install your Switch and perform initial management configuration s. This guide is intended fo r use by network administa- tors who ar e resp onsible for installing and setting up network equ ipment. Conseque ntly , it assu mes a basic working knowledge of LANs (local ar ea networks). Diese Anleitung i ...
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6 A BOUT T HIS G UIDE Related Documentation In addition to this guid e, each 3Com Baseline Switch 2250 Plus documentation set includes the followin g: ■ Online Help – Accessible from the Web interface, provides information that helps you perform tasks using the Web interface . ■ Release Notes – Provide information about t he curr ent softwa ...
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1 I NTR ODUCING THE B ASELINE S WITCH This chapter provides an ov erview of the featur es and capabilities of the 3Com ® Baseline Switch 2250 Plus. It also identifies the cont ents of the Switch package and helps you get to know t he physical features of the device. Overview of the Basel ine Switch 2250 Plus The 3Com® Baseline Switch 2250 Plus is ...
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8 C HAPTER 1: I NTRODUCING THE B ASELINE S WITCH SFP Ports The two SFP ports support f iber Gigabit Ethernet short-wave (SX) and long-wave (LX) SFP transceivers in any combination. This of fers you the flexibility of using SFP transceivers to provide connectivity between the Switch and a 1000 Mbps core network. When an SFP port is in operation, th ...
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Physical Features 9 available communicatio n paths between switche s and to determine the best available path and block le ss optimal pa ths. For information on configuring BPDU forwar ding and blocking, r efer to “ Span ning T ree ” on page 41 . Physical Features Figure 1 shows the front and r ear panels of the Switch. The numb ers in this dia ...
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10 C HAPTER 1: I NTRODUCING THE B ASELINE S WITCH (half-duplex or full-duplex) ar e automatically determined by the capabilities of the connected device. Each port also supports automatic MDI/MDI-X detection and can be connected to eith er a 10BASE-T , or a 100BASE-T X device. CAUTION: The Switch supports full-du plex autonegotiation. If the connec ...
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Physical Features 11 Ta b l e 5 10BASE-T/100BASE-TX/1000B ASE-T Ports (4) Module Acti ve LEDs The Module Active LEDs show the status of any SFP modules that are installed. Ta b l e 6 Module Active LEDs Flashing Y ellow Packets are bei ng received or transmitted on the p ort at 10 Mbps Off Link not established, either nothin g is connected to the po ...
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12 C HAPTER 1: I NTRODUCING THE B ASELINE S WITCH (5) Power LED The Power LED shows the powe r status of the Switch. Ta b l e 7 Power LED (6) Self-Adhe sive Pads The unit is supplied with four self-adh esive 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 t ...
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2 I NSTALLING THE S WITCH This chapter contains info rmation that you need to install and set up the Switch . It covers the following topics: ■ Positioning the Switch ■ Rack-Mount ing or Free-Standing ■ Supplying Power to the Switch ■ Connecting a Network Device ■ Connecting a Network Device ■ Performing Sp ot Checks Before Y ou Begin W ...
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14 C HAPTER 2: I NSTALLING THE S WITCH reco mmends that you pr ovide a minimum of 25 mm or 1 in. clearance). ■ The air is as free of dust as possible. ■ T emperature operating limits are not likely to be exceeded. It is r ecommended th at the uni t is installed in a clean, air conditioned environment. It is always good practice to wear an anti- ...
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Rack-Mounting or Free-Standing 15 T o rack -mount the Switch: 1 Place the unit the rig ht way up on a hard, flat surface with the fr ont facing towar ds you. 2 Locate a mounting bracket over the mounting holes on one side of the unit. 3 Insert the tw o screws supplied in th e mounting kit and fully tigh ten with a suitable screwdriver . Figure 2 In ...
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16 C HAPTER 2: I NSTALLING THE S WITCH Placing Units On T op of Each Other If the Switch units ar e fr ee-standing, up to four units can be placed one on top of the other . If you are mixing a variety of Baseline and Su perStack units, the smaller units must be positione d at the top. If you are placing Switch un its one on top of the other , you m ...
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Connecting a Network Device 17 If POST fails, try the following: ■ Power of f the S witch, and th en power it on again. Check the Power LED and see if POST was successfully completed. ■ Reset the Switch. See “ Resetting to Factory Defaults ” on page 59 . CAUTION: Resetting the Switch to its factory de faults erases all your settings. Y o u ...
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18 C HAPTER 2: I NSTALLING THE S WITCH Using SFP T ransceivers The following sections describe how to inser t and remove an SFP transceiver fr om an SFP slot. SFP transceivers are hot-in sertable and hot-swappa- ble. Y ou can remove the m from and in sert them into any SFP port w ithout having t o power of f the Switch. Approved SFP T ransceivers T ...
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Performing Spot Checks 19 CAUTION: SFP 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 then re-insert it. 3 Remove the plasti c protec tive cover , if fitted. 4 Connect the fiber cable. 5 The transceiver connects to the network using a duplex LC ...
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20 C HAPTER 2: I NSTALLING THE S WITCH ...
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3 C ONNECTING TO THE W EB I NTERFACE The Switch has a built-in We b interface th at you can use to set the admin password, change the IP addr ess that is assigned to the Switch, and config ure it s advanced settings. If you only want the Switch to function as a b asic layer 2 switch, you do no t need to access the W eb interface and configure the S ...
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22 C HAPTER 3: C ONNECTING TO THE W EB I NTERFACE The We lcome scr een of Discover y appears. Figure 5 Welcome Scr een of Discovery 2 If the computer has multiple network adapters, se lect the adapter that connects the computer t o the Switch, an d then click Next . If the computer has only one adapter , click Next . Discovery searches the network ...
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Logging On to the W eb Interface 23 Logging On to the Web Interface After the Web int erface loads in your W eb br owser , the first page that appears is the logon screen. On this screen, you need to enter the administration user name and passwor d to gain access to the W eb interface. The logon screen also displa ys the IP addr ess that the Switch ...
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24 C HAPTER 3: C ONNECTING TO THE W EB I NTERFACE Ta b l e 1 0 lists the available items on the menu. Ta b l e 1 0 A vailable Menu Items Menu Item Description Device Summary Contains tabs that allow you to: ■ Provide a summary of th e Switch’s basic settings and versions of current components. ■ Set the polling interval in seconds. ■ Displa ...
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Navigating the W eb Interface 25 Buttons Depending on the screen that is cur rently displ ayed, the following butt ons may appear: ■ Apply – Click to save and apply any changes that you have made ■ Cancel – Click to discard any uns aved changes Link Aggregation Contains tabs that allow you to: ■ Display link aggregation su mmary. ■ Crea ...
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26 C HAPTER 3: C ONNECTING TO THE W EB I NTERFACE Accessing the Interface Without Using Discovery The Discovery application wo rks by automatically detecting the IP address th at is assigned to the Switch, and then us ing that address to connect to the Web interface. If you know the Switch’ s IP address, you can access the W eb interface withou t ...
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4 C ONFIGURING THE S WITCH This chapter provides information on how to configure the Switch’ s advanced features. T opics include: ■ Device Summary Information ■ Administration Sett ings ■ Configuring VLANs ■ Configuring Port Settings ■ QoS V oIP T raffic Settings ■ Security ■ Monitoring Configuration Overview The Switch is shipped ...
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28 C HAPTER 4: C ONFIGURING THE S WITCH Figure 9 Device View If you request for technica l as sistance from 3Com Support, you may be asked to print out the information on this scr een. Polling Interval Enter the interval in second s you would like the Switch to r efr esh. (Range: 10 to 180 seconds; 0 to disable polling). Figure 10 Device View T o s ...
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Administration Settings 29 Administration Settings The Administration menu includes ei ght administration items: ■ IP Setup ■ Backup Configuration ■ Restor e Configuration ■ Firmware Upgrade ■ Initialize ■ Reboot ■ System Access ■ System Time ■ SNMP Modifying the IP Addr ess Settings T o enable devices on the network to communicat ...
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30 C HAPTER 4: C ONFIGURING THE S WITCH IP Setup T o se t the IP address for th e Switch: 1 Click Admini stration , then IP Setting on the men u. The IP Settings screen appe ars. Follow the IP Setup Wizard to complete the setup. This wizard can a lso be used to set syste m name, location and contact infor mation. Figure 12 IP Settings Screen Backup ...
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Administration Settings 31 3 Click Restore to copy the config uration back to the Switch. For security purposes, resto ring the configurat ion does not change the passwor d. Firmware Upgrade The Upgrade facility allows you to install on the Switch any new releases of system firmware that 3Com may make available. Newer versions of firmwar e can be d ...
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32 C HAPTER 4: C ONFIGURING THE S WITCH your computer to r e-establish communication with the Switch. Reboot Clicking on Administra tion , then Reboot on the menu has the same effect as power cyclin g the unit. No configuration information will be lost. Reboot the Switch if you ar e experiencing pr oblems and you want to r e-establish your In terne ...
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Administration Settings 33 Cr eate User This page allows you to create a user and define the access level and passwor d for that user . Figure 17 CreateUser Scr een Modify User This page allows you to modify a user’ s access level and password. Figure 18 Modify User Scr een Remove User T o remove a us er fr om the Switch, click on the use r name, ...
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34 C HAPTER 4: C ONFIGURING THE S WITCH System Time Click Administration , then System Time on the men u. This screen allows you to set the system time. Y ou can set the Y ear , Month, Day , Hours, Minutes, and Seconds. Figure 20 System Time Screen SNMP Simple Network Management Protocol (SNMP) is a communication pr otocol designed specifically for ...
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Configuring VLANs 35 Figure 23 SNMP Add Screen SNMP Remove This page allows you to remove community strings. Figure 24 SNMP Remove Scree n Configuring VLANs A virtual LAN (VLAN) is a collection of network nodes that share the same collisi on domain, regar dless of their physical location or connectio n point in the network. A VLAN serves as a logic ...
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36 C HAPTER 4: C ONFIGURING THE S WITCH VLAN Click Device , then VLAN on the menu. A screen appears with seven tabs that include: ■ Setup ■ Modify VLAN ■ Modify Port ■ Rename ■ Remove ■ Port Detail ■ VLAN Detail Setup Use the Setup screen to cr eate VLANs on the Switch. T o propagate info rmation about VLAN gr oups used on this Switch ...
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Configuring VLANs 37 Figure 26 Modify VLAN S creen 1 Enter a set of VLANs or select all VLANs to configur e, then click Select . 2 From t he drop down menu , select a VLAN to modify . 3 Select a membership use. Available options for each port include (o nly one option can b e associated with a single port): ■ T agged ■ Untagged 4 Select ports t ...
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38 C HAPTER 4: C ONFIGURING THE S WITCH Rename Use the Rename screen to change the name of a VLAN. Figure 28 Rename Scr een 1 Enter a set of VLANs or select all VLANs to add to the rename list, then click Select . 2 From the list of selected VLANs, choose a VLAN to rename. Enter a new VLAN name and click Apply . Remove Use the Remove screen to remo ...
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Configuring VLANs 39 Port Detail Choose a port t o display the tagg ed and untagge d VLAN memberships it is associated with. Figure 30 Port Detail Screen VLAN Detail Use this screen to display detailed VLAN information. 1 Enter a set of VLANs or select all VLANs to add to the details list, then click Select . 2 From drop down menu, choose a VLAN to ...
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40 C HAPTER 4: C ONFIGURING THE S WITCH The Switch will only forwar d a frame to ports that are members (tagged o r untagged) of t he VLAN to which the frame is assigned. If the port is an untagged member , the egress frame will be stripped of the VLAN tag and forwarded as untagg ed. However , if the port is a tagged member , the egress frame is fo ...
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Configuring VLANs 41 Figure 33 T agged VLAN Configuration T o set up the configuration shown in Figur e 33 , do the following: 1 Creat e VLAN2 on both Switch 1 and Switch 2. Y ou need not cr eate VLAN1 since it exists by default. 2 On Switch 1, set the ports that you want to be part of VLAN2 to Untagged . Set one po rt (for exam ple, port 16) to T ...
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42 C HAPTER 4: C ONFIGURING THE S WITCH After all the bridges o n the network ha ve determined the configuration of their ports, each bridge only forwards traffic between th e Root Port and the ports that are the Designate d Bridge Ports fo r each networ k segment. All other por ts are blo cked, which means that they are prevented from forwarding t ...
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Configuring Port Settings 43 Broadcast Storm Use the Br oadcast Storm page to set the Switch’ s broadcast storm control and threshold limits. A broadc ast storm is an incorr ect packet sent o ut on a network that cau ses most hosts to respond all at once, typically with wrong answers that start the process over again. Broadcast storms use sub sta ...
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44 C HAPTER 4: C ONFIGURING THE S WITCH Figure 38 Port Administration Summa ry Screen Detail Use the Detail tab to display detailed port sett ing information for a port. Figure 39 Port Administrati on Detail Scre en Setup Use the Setup tab to configure the port set tings. The following options are available: ■ Port State – Enables and disables ...
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Configuring Port Settings 45 ■ Duplex – Sets the duplex mode of the port. Available options include auto, half, and full. If you modify any of these settings, click Apply to save your changes. Figure 40 Port Administration Setup Scre en Speed/Duplex for 1000 Mbps Connections Y ou cannot pr eset the speed t o 1000 Mbps. To r u n a port at 1000 M ...
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46 C HAPTER 4: C ONFIGURING THE S WITCH Guidelines for Creating T runks ■ Any port on the Switch can be used for cr eating a trunk. ■ This switch supports a maxi mum of four trunks. ■ Each trunk may contain up to four members. ■ A port may only be a member of one trunk at any one time. ■ All ports in a trunk must be configured in an ident ...
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Configuring Port Settings 47 Modify Use the Modify tab reassign port members to a link aggregat ion grou p. Figure 43 Link Aggr egation Modify Sc reen T o modify a link aggregatio n group : 1 Select the aggr egation gr oup to modify , then click Select . 2 Select the ports to add to the goup. 3 Click Apply . Remove Use the Remove tab dele te a link ...
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48 C HAPTER 4: C ONFIGURING THE S WITCH the Root Bridge generates BPDUs (Bridge Pr otocol Data Units) on all ports at a regular interval known as the Hello T ime. All other spanning tree-compliant devices on the network have a designated Root Port. This is the Port nearest the Root Bridge and it is used for receiving the BPDUs initia ted by the Roo ...
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Configuring Port Settings 49 Figure 46 Spanning T ree Detail Screen Setup Use the Setup tab to configur e the spanning tree settings for ea ch port. The following optio ns are available: ■ Status – Enables and disables spanning tree for the port. ■ Edged Port – Enables and disables edged port for the port. ■ Link T ype – Choo se between ...
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50 C HAPTER 4: C ONFIGURING THE S WITCH Figure 48 Port Mirroring Screen T o set up port mirr oring: 1 Connect a network analyzer to a port. 2 Access the Web interface. Click Port , then Port Mirroring on the menu . The Port Mo nitoring Set up Screen appears. 3 Select the port numb er under Monitor Port to which you want to monitor . T raffic to and ...
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QoS V oIP T raffic Settings 51 Setup Use the Setup tab to co nfigure the global settings fo r V oice VLAN. The following options are available: ■ V oice VLAN Status – Enable or disable V o ice VLAN for the switch. ■ V oice VLAN ID – Input the V oice VLAN ID for the switch. ■ V oice VLAN Aging T ime – Input the aging time. Y ou must firs ...
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52 C HAPTER 4: C ONFIGURING THE S WITCH Figure 52 QoS Port De tail Scr een OUI Summary Use the OUI Summary tab to display the list of Organizational Unique Identifier for a company a nd their description. Figure 53 QoS OUI Summary Screen OUI Modify Use the OUI Modify tab to ad d to the list of Organizational Uni que Id entifier . The following opti ...
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Security 53 Security Using the W eb interface, you can configur e the RADIUS Client and 802.1X settings. The Security menu includ es two items: ■ RADIUS Client ■ 802.1X Setting s RADIUS Client Remote Authen tication Dial-in User Service (RADIUS) is a logon authentication prot ocol that uses s oftwar e running on a central server to control acce ...
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54 C HAPTER 4: C ONFIGURING THE S WITCH Figure 56 RADIUS Client Configur e Screen 802.1X Settings The IEEE 802.1X (dot1x) stand ard defi nes a port-based access control procedur e that prevents unauthorized access to a network by r equiring users to first subm it credentials for authenticatio n. The 802.1X settings menu includes three tabs: ■ Sum ...
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Security 55 Setup Use the Setup tab to configur e the 802 .1X authenticaion settings. The following fields are available: ■ System Authentication – Sets the global setting for 802.1X. (Def ault: Disabled) ■ Operation Mode – Allows single or multiple hosts (clients) to connect to an 802. 1X-authorized port . (Options: Single-Host, Mult i-Hos ...
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56 C HAPTER 4: C ONFIGURING THE S WITCH Monitoring Using the W eb interface, you can display addr ess table information and cable diagnostics. The Monitorin g menu includ es two items: ■ Address T able ■ Cable Diagnostics Address T able Use the Addr ess T able Summary screen to display the Address T able information. Y ou can query by selec tin ...
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Monitoring 57 Diagnostics Use the Diagnostics tab to display ind ividual port information on T est Result, Cable Fault Distance, and Last Update. Figure 62 Cable Diagnostic Scr een ...
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58 C HAPTER 4: C ONFIGURING THE S WITCH ...
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5 T R OUBLESHOOTING This chapter lists some issues th at you may encounter while installing, using, and managing the Switch, with suggested cou rses of corr ective action to take. If you encounter an issue th at is not lis ted her e and you cannot solve it, chec k the 3Com Knowledgebase at http://knowledgebase.3com.com befor e contacting your local ...
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60 C HAPTER 5: T ROUBLESHOOTING Forgotten Static IP Address If you forget th e static IP address that you assigned to the Switch and you need to access the Web interface, use the Discovery application to automatically detect the IP address and connect to the interface. For information on using t he Discovery application, re fe r t o “ Running the ...
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If the Problem Persists 61 Ensure that the connected device has either: ■ Autonegotia tion enabled, or ■ The ports are configur ed for half-duplex operation All ports appear to show continual activity . There may be broadcast storms o n the networ k. Remove port connections one at a time, wa iting a few seconds between each port. If the LEDs go ...
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62 C HAPTER 5: T ROUBLESHOOTING ...
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A O BTAINING S UPPORT FOR Y OUR P R ODUCT Register Y our Product W arranty and other service benefits start from the date of purchase, so it is im portant to register you r product quickly to ensure you get full use of the warranty and other ser vice benefits available to you. W arranty and other servic e benefits a re enabled thr ough pr oduct r e ...
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64 A PPENDIX A: O BTAINING S UPPORT FOR Y OUR P RODUCT at http://eSupport.3com.com/ , or u nder the Product Support heading at http://www.3com.com/ Software Up grades are the softwar e releases that follow the software version included with your origi- nal prod uct. In order to access upgrades and r elated documentat ion you must first purchase a s ...
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Contact Us 65 . Country T elephon e Number Asia, Pacific Rim T elephon e T echnical Support and Repair Australia Hong Kong India Indonesia Japan Malaysia New Zealand Pakistan Philip pines P .R. of Ch ina Singapor e S. Korea Ta i w a n Thailand 1 800 678 515 800 933 486 +61 2 9424 5179 or 000800 6501111 001 803 61 009 00531 616 439 or 03 3507 5984 1 ...
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66 A PPENDIX A: O BTAINING S UPPORT FOR Y OUR P RODUCT Antigua Argentina Aruba Bahamas Barbados Belize Bermuda Bonair e Brazil Cayman Chile Colombia Costa Rica Curacao Ecuador Dominican Republi c Guatemala Haiti Honduras Jamaica Martinique Mexico Nicaragua Panama Paraguay Peru Puerto Rico Salvador T rinidad and T obago Uruguay Ve n ez u e l a Virgi ...
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B S AFETY I NFORMATION Important Safety Information Please refer to the sa fety informat ion found in t he 3Com Switch Family Safety and Regulator y Informa- tion manual included with this pr oduct. Y ou can find the 3Com Switch Family Safety and Regulatory Information manual on the product CD-ROM that was included with your switch. Y ou can also d ...
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68 A PPENDIX B: S AFETY I NFORMATION ...
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C T ECHNICAL I NFORMATION Related Standards The 3Com Baseline Switch 2250 Plus has been designed to the followi ng standar ds: Environmental Physical Electrical Functional ISO 8802-3, IEEE 802.3 (Ethernet), IEEE 802.3u (Fast Ethernet), IEEE 802.3ab (Gigabit Ethernet), IEEE 802.3x (Flow Contr ol), IEEE 802 .1D (Bridging) MAC Addr ess 4096 Safety UL/ ...
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70 A PPENDIX C: T ECHNICAL I NFORMAT ION ...
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G LOSSARY 10BASE- T The IEEE specification for 10 Mbps Ethernet over Category 3, 4 or 5 twisted pair cable. 100BASE- TX The IEEE specification for 100 Mbps Fast Ethernet over Category 5 tw isted-pair cable. 1000BASE-LX IEEE 802.3z specification fo r Gigabit Ethernet over 9/125 micr on cor e single-mode f iber cable. 1000BASE-SX IEEE 802.3z specific ...
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72 G LOSSARY category 5e cables One of five grades of T wisted Pair (TP) cabling defined by the EIA/TIA-568 standar d. Category 5e can be used in Ethernet (10BAS E-T), Fast Ether net (100BASE-TX) and Gigabit Ether net (1000BASE-T) networks, and can tr ansmit data at speeds of up to 1000 Mbps. category 6 cable One of five grades of T wisted Pair (TP ...
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G LOSSARY 73 standar d way for VLANs to communicate acr oss switched networks. IEEE 802.1 p An IEEE standa rd for prov id ing quality of service (QoS) in Ethe rnet networks. The st andard uses packet tags that define up to eight traffic classes and allow s switches to transmit packet s based on the tagged priority value. IEEE 802.3ad A standard tha ...
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74 G LOSSARY Most devices that connec t to a LAN have a MAC address assigned to them as they are used to identify other devices on a netw ork. MAC addresses are 6 bytes long. network A network is a collection of computers and other computer equipm ent that are connected for the purpose of exchanging info rmation or shar ing resour ces. Networks var ...
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G LOSSARY 75 developed for the int erco nnection of networks . Originally a UNIX standard, TCP/IP is now supporte d on almost all platforms, and is th e prot ocol of the Internet. TCP relates to the content of the data travelling through a network — ensuring th at the inf ormation sent arriv es in one piec e when it r eaches i ts destination. IP ...
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76 G LOSSARY ...
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I NDEX Numbers 1000BASE-LX 71 1000BASE-SX 71 1000BASE-T 71 100BASE-TX 71 10BASE-T 71 A auto IP confi guration 29 default IP address 29 default mask 29 autonegotiati on 7 autosensing 7 B bandwidth 71 C client 72 configuration overview 27 connecting network device 17 SFP transceivers 18 conventions notice icons, About This Guide 5 text, About T his G ...
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78 I NDEX changing 32, 34 default (blan k) 32 setting 28 physical features 9 port settings configuring 43, 50, 53 ports RJ-45 11 SFP 8, 10 positioning 13 POST 16 powering on 16 power -on self-test See POST protocol defined 74 R rack-mounting 14 rear p anel power supply 12 Recovery button 12 resetting to factory defaults 59 RJ-45 defined 74 ports 11 ...
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R EGULATORY N OTICES FCC S TATEMENT This equipment has been tested and found to comply with the limits for a Class A digital device, pursu ant to part 1 5 of the FCC rul es. These limit s are designed to provide reasonable protection against harmful interfere nce when the equipment is operated in a commercial environment. This equipment generates, ...
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