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Monitoring

4-19

Monitoring Activity and Errors Statistics

Quick Config Manager allows you to display the total

network activity and errors seen by a port or the hub

(all ports) in any one time period.

To display the Activity/Errors graph for a port:

Double-click on the port for which you want to

display the Activity/Errors graph.

In the Port dialog box, choose the

Info

category.

In the Repeater Port Info panel, select the

Activity

check box.

Click on

To display the Activity/Errors graph for the hub:

■

From the

View

menu, select

Activity/Errors

Quick Config Manager displays the Activity/Errors

graph, as shown in

Figure 4-7

Figure 4-7

Activity/Errors Graph

16710.bk : MANAGING.FRM Page 19 Tuesday, October 7, 1997 11:38 AM

Содержание 3C16710 - OfficeConnect 8/TPM Hub

Страница 1: ...Part No DUA1671 0AAA03 Published October 1997 OFFICECONNECT HUB 8 TPM 3C16710 USER GUIDE 16710 bk FRONT FRM Page 1 Tuesday October 7 1997 11 38 AM...

Страница 2: ...e clause at 48 C F R 52 227 7013 3Com Technologies c o 3Com Centre Boundary Way Hemel Hempstead Herts HP2 7YU UK For civilian agencies Restricted Rights Legend Use reproduction or disclosure is subjec...

Страница 3: ...the OfficeConnect Hub 2 5 Using the Rubber Feet and Stacking Clips 2 6 Wall Mounting the OfficeConnect Hub 2 7 Connecting Workstations and Other Equipment to Your Hub 2 7 Connecting OfficeConnect Hub...

Страница 4: ...Port 4 25 Hub Security 4 28 Configuring Security at Port Level 4 29 Configuring Security at Hub Level 4 31 Resilience 4 33 Setting Up a Resilient Link Pair 4 34 Using the Hub to Monitor Other Devices...

Страница 5: ...rds A 1 Cabling A 2 10BASE T A 2 Console Port A 3 IP AND IPX ADDRESSES IP Addresses B 1 Obtaining a Network Number B 2 How IP Addresses Work B 3 Assigning IP Addresses to a Small Contained Network B 5...

Страница 6: ...16710 bk 16710 TOC Page vi Tuesday October 7 1997 11 38 AM...

Страница 7: ...wer to the OfficeConnect hub by disconnecting the power adapter from the unit or from the socket outlet This unit operates under SELV conditions Safety Extra Low Voltage according to IEC 950 the condi...

Страница 8: ...e ziehen oder die Verbindung zum Ger t unterbrechen Dieser Hub arbeitet mit SELV Spannung Safety Extra Low Voltage Sicherheitskleinspannung gem IEC950 Diese Bedingungen werden nur eingehalten wenn die...

Страница 9: ...ranchant la pi ce de raccordement d alimentation de l unit ou du socle de prise de courant Ce moyeu fonctionne sous les conditiones SELV S curit du Voltage le plus Bas d apr s IEC950 les conditions de...

Страница 10: ...to allow you to continue managing the hub If you want to return the hub to its default address settings you must enter them manually For information on configuring the hub s address settings see Givin...

Страница 11: ...nformation in this guide and use the information given for reference purposes There is a Quick Reference Guide accompanying this guide It contains some useful information from this guide which you may...

Страница 12: ...Do not press the Return or Enter key when an instruction simply says type Text represented as screen display This typeface is used to represent displays that appear on your screen for example Enter th...

Страница 13: ...desktop use and is part of the OfficeConnect range which neatly stack together with clips providing a host of facilities for example print sharing and a network fax For information on these products s...

Страница 14: ...A Local Area Network LAN is a network usually in an office that spans no more than a single site Ethernet is a type of LAN referring to the technology used to pass information around the network 10BAS...

Страница 15: ...ns can also indicate faulty cabling Device is a term that is usually used to refer to a piece of network equipment Every device has a unique address that is used to identify it on the network SNMP Sim...

Страница 16: ...o IP SLIP Serial Line Internet Protocol allows you to run the IP protocol over a serial line connection VT100 is a type of terminal which uses ASCII characters VT100 screens have a text based appearan...

Страница 17: ...ub to other OfficeConnect hubs LEDs and Ports The hub features diagnostic LEDs and easy to use ports The LEDs are shown in Figure 2 1 and are used for Showing you how the hub and its ports are operati...

Страница 18: ...2 2 CHAPTER 2 CREATING YOUR NETWORK Figure 2 1 The LEDs And How To Use Them 16710 bk CREYRNET FRM Page 2 Tuesday October 7 1997 11 38 AM...

Страница 19: ...LEDs and Ports 2 3 Figure 2 2 The Ports And How To Use Them 16710 bk CREYRNET FRM Page 3 Tuesday October 7 1997 11 38 AM...

Страница 20: ...connections for all your equipment 3Com produce a range of easy to install network adapters which provide your workstations with 10BASE T connections 2 An operating system with network support configu...

Страница 21: ...ces provide adequate clearance of the other ports Two 10BASE 2 50 Ohm terminators end pieces If you have additional hubs you want to connect using 10BASE T you need One Straight through 10BASE T cable...

Страница 22: ...on a flat surface Your clips fit in the positions on the side of the unit as shown in Figure 2 3 1 2 Position a clip over one of these holes and push it in until it clicks into place as shown in Figur...

Страница 23: ...ush the hub up and off the wall CAUTION Only wall mount single hubs do not wall mount stacked hubs Connecting Workstations and Other Equipment to Your Hub WARNING Ensure you have read the Important Sa...

Страница 24: ...nator end piece Connecting OfficeConnect Hubs Together You can increase the number of workstations that can connect to your network by adding more OfficeConnect hubs You can use either 10BASE T or 10B...

Страница 25: ...Y pieces provide adequate clearance of the other ports Connect a 10BASE 2 Y piece to each of your hubs Daisy chain each Y piece with 10BASE 2 Coax cable to form a single segment as shown in Figure 2 4...

Страница 26: ...of the lower hub to port 7 of the hub immediately above Repeat for each hub as shown in Figure 2 5 2 Set all MDI MDIX switches to MDI in except for the top hub the one with port 8 not connected to an...

Страница 27: ...rt is not used and is not terminated the LED should be yellow showing that it has partitioned This is correct operation Spot Checks At frequent intervals visually check that The Alert LED is not lit t...

Страница 28: ...2 12 CHAPTER 2 CREATING YOUR NETWORK 16710 bk CREYRNET FRM Page 12 Tuesday October 7 1997 11 38 AM...

Страница 29: ...or information on Microsoft Windows refer to the Microsoft Windows User s Guide You can also manage your hub using a VT100 terminal or any Telnet facility that emulates a VT100 terminal VT100 uses a t...

Страница 30: ...to refresh its statistics and use any new configurations Initialize the hub to return it to its factory settings IP and console port information is retained Display a graphical representation of the...

Страница 31: ...operation to an IP IPX based management application Poll a remote device to see if it is operational View any faults that have occurred with the hub Download any future software upgrades to the hub Co...

Страница 32: ...for connection to the hub s console port This is available from your supplier The null modem cable must Have a 9 pin female D connector for connection to your hub and the appropriate connector for con...

Страница 33: ...on you are using needs to run suitable terminal emulation software Many VT100 terminal emulation packages are available Microsoft Windows has a terminal emulation program called HyperTerminal for Wind...

Страница 34: ...PX based Network Management Application 3Com s Transcend network management applications enable you to get the best out of your hub Any IP IPX based network management application can manage the hub T...

Страница 35: ...al out feature which can be set up by your supplier to inform them when your hub or network is operating incorrectly This allows your supplier to know immediately when certain problems occur so they c...

Страница 36: ...3 8 CHAPTER 3 ABOUT NETWORK MANAGEMENT 16710 bk ABOUTMAN FRM Page 8 Tuesday October 7 1997 11 38 AM...

Страница 37: ...Config Manager you must make a connection to the hub s console port see Chapter 3 In the descriptions of the options given in this chapter the default values are underlined Installing Quick Config Ma...

Страница 38: ...gram Manager window select the Run command from the File menu 4 In the Command Line box type drive SETUP where drive is the letter of your 3 5 disk drive and click on OK The installation program start...

Страница 39: ...his is particularly useful if you have many OfficeConnect hubs that need configuring or monitoring This feature only works if all the hubs you are going to connect to have the same baud rate or are se...

Страница 40: ...4 4 CHAPTER 4 MANAGING YOUR HUB USING QUICK CONFIG MANAGER Figure 4 1 Quick Config Manager Window Map 16710 bk MANAGING FRM Page 4 Tuesday October 7 1997 11 38 AM...

Страница 41: ...Quick Config Manager Window Map 4 5 16710 bk MANAGING FRM Page 5 Tuesday October 7 1997 11 38 AM...

Страница 42: ...ows you to view the hub s information To enter the community string 1 Double click on the Quick Config Manager icon to start the application 2 From the Configure menu select Community Polling Quick Co...

Страница 43: ...Through VT100 management you can configure new users for the hub with different community strings see Configuring Users on page 5 17 Giving the Hub an IP Address You can configure the hub with an IP...

Страница 44: ...ss information for the hub but want to go through the Easy Set Up option again you can start it by clicking on the Easy Set Up button If no previous IP information has been configured for the hub or t...

Страница 45: ...tor possibly yourself who should be contacted in an emergency Support Contract Provides a box for you to type the ID number of any technical support contract you may have The default entries for these...

Страница 46: ...SubNet Mask Enter the SLIP subnet mask For a class C address 255 255 255 0 the default is suitable If you are using SLIP and have changed any of the console port settings using VT100 ensure that Flow...

Страница 47: ...ses it to return to its factory default settings You may want to do this if the hub has been previously used in a different part of your network and its settings are incorrect for its new environment...

Страница 48: ...nection is lost Blue Port disabled by management In the Community Polling dialog box you can specify whether the zoom view is invoked on starting Quick Config Manager and how often the zoom view is po...

Страница 49: ...at information can be obtained from the hub by an SNMP network management station To display this information 1 Do one of the following Double click on the graphical representation of the hub but not...

Страница 50: ...nt of a problem with the hub sysName Provides a box for you to type the name of the hub sysContact and sysName use the same information as the Device Configuration fields in the IP Setup dialog box so...

Страница 51: ...unauthorized access to your network Poll Failures If your hub has been configured to monitor a device it periodically polls it for information If the device fails to respond the failure is seen by the...

Страница 52: ...you select Enable and click on OK the Alert LED lights regardless of the true alert condition of the hub When you have finished your test remember to disable to Alert LED Test To do this select Disabl...

Страница 53: ...unicate through your hub If this condition caused the Alert LED to light the LED goes off after you have acknowledged the alert by pressing the associated Ack button the LED stays lit if other conditi...

Страница 54: ...whether the Alert LED lights if a certain level of network errors is exceeded for approximately one minute The levels are High 100 errors per 10000 frames Med 10 errors per 10000 frames Low 1 error pe...

Страница 55: ...on the port for which you want to display the Activity Errors graph 2 In the Port dialog box choose the Info category 3 In the Repeater Port Info panel select the Activity check box 4 Click on OK To d...

Страница 56: ...sual increases in traffic rate this can indicate a potential problem Broadcast Shows the number of frames received which are addressed to all devices The number of broadcast frames is normally a small...

Страница 57: ...To display the Frame Types pie chart for a port 1 Double click on the port for which you want to display the Frame Types pie chart 2 In the Port dialog box choose the Info category 3 In the Repeater...

Страница 58: ...own in the Frame Types pie chart are per poll period not per second To change the poll period see Accessing the Hub on page 4 6 Network Traffic Statistics Quick Config Manager allows you to display th...

Страница 59: ...ph for a port 1 Double click on the port for which you want to display the Network Errors graph 2 In the Port dialog box choose the Info category 3 In the Repeater Port Info panel select the Errors ch...

Страница 60: ...with alignment errors also known as framing errors Alignment errors should be a very small percentage of the total traffic They are likely to be caused by a fault at the transmitting device Locate the...

Страница 61: ...nd change the transceiver or network adapter in the device to see if this eliminates the problem The values shown in the Network Errors graph are per poll period not per second To change the poll peri...

Страница 62: ...t of the hub To configure a port 1 From the View menu select Zoom In to display the representation of the hub 2 Double click on the port you want to configure 3 In the Port Configuration dialog box ch...

Страница 63: ...at information to and from the network Link Traps Enabled Disabled Selects whether a trap is sent to an IP IPX based network management application if the link state changes Partition Traps Enabled Di...

Страница 64: ...l devices that you want to connect to any of a number of ports you would manage at hub level to secure that connection If you simply want to disable a port see Configuring a Port on page 4 25 3Com s s...

Страница 65: ...Configuration dialog box select the Security category Quick Config Manager displays the Port Security Configuration panel as shown in Figure 4 12 In the Port Security Configuration panel at port leve...

Страница 66: ...overwriting the addresses it learned previously The port never automatically switches to full security for example Auto Learn you have to do this manually While learning packets received on a port ar...

Страница 67: ...led allows broadcast frames to be transmitted to the port Allow Broadcasts and Multicasts In addition to Enabled allows broadcast and multicast frames to be transmitted to the port When you click on O...

Страница 68: ...on a port to select it from the list or perform a multiple selection Selected Shows the ports selected to be configured Click on a port to select it from the list or perform a multiple selection Selec...

Страница 69: ...ost Figure 4 14 A Failed Link Between Two Hubs If a spare link could automatically pick up when the broken link failed the network would appear to function normally to the user At worst a few packets...

Страница 70: ...nk is solved the standby link stays active and the main link acts like a standby link You can use management to view the status of your links and to send traps messages to an IP IPX based network mana...

Страница 71: ...lowing Double click on the graphical representation of the hub but not on a port From the Configure menu select General Info 3 In the General Info dialog box choose the Resilience category The Resilie...

Страница 72: ...ink pair is operational or not When operational either the main port or the standby port can repeat traffic Main State Standby State Shows whether the main or the standby link is the active link in th...

Страница 73: ...X based network management application should a problem occur with a device attached to it The hub notifies the IP IPX based network management application by sending SNMP traps messages to it If you...

Страница 74: ...polled If the device is critical to the performance of your network select a frequent rate If the device is not important or on a remote network you can select a less frequent rate 6 Select whether p...

Страница 75: ...rough which the hub communicates with the device or any information gathered during the poll You can edit or delete a Remote Poll by selecting it from the panel and clicking on the appropriate button...

Страница 76: ...4 40 CHAPTER 4 MANAGING YOUR HUB USING QUICK CONFIG MANAGER 16710 bk MANAGING FRM Page 40 Tuesday October 7 1997 11 38 AM...

Страница 77: ...chosen screen In the descriptions of the options given in this chapter the default values are underlined VT100 User Interface We suggest you read through this section before you use the hub s VT100 f...

Страница 78: ...hat you cannot change OK Button Text for a button is shown in upper case letters A button performs an action A menu screen such as the Main Menu consists of a number of buttons arranged in a column Ot...

Страница 79: ...emulation program you may find that some control keys do not operate or that they activate other functions The Windows terminal emulator uses Ctrl H as backwards deletion whereas others use it for bac...

Страница 80: ...f you manage at Port level you set up parameters and examine statistics for individual ports This allows you to manage individual users or small workgroups 3Com s OfficeConnect range can be physically...

Страница 81: ...Screen Map 5 5 Figure 5 1 VT100 Screen Map 16710 bk MANVT100 FRM Page 5 Tuesday October 7 1997 11 38 AM...

Страница 82: ...e terminal By default the hub automatically configures the baud rate of its console port to operate with the connected terminal or modem provided the parity stop bits and character size are identical...

Страница 83: ...on on the console port see Connecting a Modem to the Console Port on page 5 13 Autoconfigure is disabled If you are unable to obtain the banner screen it is possible that the autoconfigure option has...

Страница 84: ...ing on as one of the default users your system manager has assigned you a user name and password The user name determines which of the three access levels monitor manager or security you have The user...

Страница 85: ...e facility select the Logoff option from the bottom of the Main Menu If you accessed the facility using a Telnet session or modem connection the connection is closed automatically Auto Logout There is...

Страница 86: ...t field description if your network has a BOOTP server or enter it manually If you change the device IP address you must reset the hub to effect the change CAUTION To ensure that Quick Config Manager...

Страница 87: ...sure that Flow Control is not set to XON XOFF For information on the console port see Connecting a Modem to the Console Port on page 5 13 BOOTP Select Enabled Disabled When enabled BOOTP allows you to...

Страница 88: ...s highlighted to set up the parameters for traps CONSOLE PORT Press Return when the CONSOLE PORT button is highlighted to set up the console port parameters CANCEL Press Return when the CANCEL button...

Страница 89: ...tted with the specified delay between them The unit of throttle is one thousandth of a second The default value is 100 which gives a delay of one tenth of a second between each transmission If you set...

Страница 90: ...ed or if you change Auto Config to Enabled you need to perform the wake up procedure before communication is re established see Main Banner on page 5 6 If you are unsure of the correct settings to use...

Страница 91: ...arity and Stop Bit are all fixed Modem Dial String Configured Hub Login Over Modem Link Configured and Hub Logout Over Modem Link Configured are fields reserved for use by suppliers setting up the spe...

Страница 92: ...king yourself out from the hub completely console port access is always kept enabled for the security access level Console Port Enabled Disabled To prevent access to the management facilities through...

Страница 93: ...ame is case sensitive Password Enter a password for this user The password can be up to 10 characters The password is case sensitive and is not displayed on the screen Access Level Monitor Secure Moni...

Страница 94: ...ain differences are the password fields You must type in your current password in the Old Password field before you can change any fields To set a new password enter the password in both the New Passw...

Страница 95: ...d press Return You cannot delete the current user the user name you used to log on or any of the default users monitor manager or security Polling a Remote Device The Remote Poll screen as shown in Fi...

Страница 96: ...liseconds between the time the last frame was sent to the target device and the time a response was received by the hub If there is no response within a few seconds no reply is shown Also displayed is...

Страница 97: ...the software image stored in the management board s memory PROM Software Revision This is the version number of software stored in the Boot PROMs on the management board Downloading a Software Upgrade...

Страница 98: ...file You may wish to download the file from another directory If so you must give the full path to the file and the filename using a maximum of 30 characters Server Address Enter the IP or IPX addres...

Страница 99: ...perform a self test The self test only takes a few seconds during which all LEDs light Port Status LEDs light yellow Isolating a Problem A good way of isolating a problem is to see whether it occurs...

Страница 100: ...5 Check that the Alert LED Test is disabled in the Alerts dialog box If it is not select Disable and click on OK Port Status LED yellow for a 10BASE T port It is likely that there is a loop in your ne...

Страница 101: ...00 Main Banner screen does not display Check that your terminal or terminal emulator is correctly configured to operate as a VT100 terminal For console port access check you have performed the wake up...

Страница 102: ...k Config Manager and initialize the device see Initializing the Hub on page 4 11 This returns all configuration information including passwords to the default values Alternatively another user with se...

Страница 103: ...the hub has not been disabled If it is enabled check the connections and network cabling at the port Try accessing the hub through a different port If you can now access the hub a problem with the or...

Страница 104: ...6 6 CHAPTER 6 PROBLEM SOLVING 16710 bk PROBSOLV FRM Page 6 Tuesday October 7 1997 11 38 AM...

Страница 105: ...system This can be achieved using the console port and an approved modem Standards Functional ISO 8802 3 IEEE 802 3 Safety UL 1950 EN 60950 CSA 22 2 950 EMC EN 55022 Class B EN 50082 1 FCC Part 15 Cla...

Страница 106: ...ND CABLING Cabling 10BASE T Figure A 2 Pin Numbering For 10BASE T Straight through Figure A 3 Straight through 10BASE T Cabling Crossover Figure A 4 Crossover 10BASE T Cabling 16710 bk DIMSNSTA FRM Pa...

Страница 107: ...or Serial Connection Examples of Null Modem Cables You Can Use Figure A 6 Example Of Null Modem Cabling For 9 Pin Workstation Figure A 7 Example Of Null Modem Cabling For 25 Pin Workstation 16710 bk D...

Страница 108: ...S AND CABLING Modem Cable Figure A 8 Modem Cabling For 25 Pin Modem Management Settings You need to set your management equipment to Character size 8 Stop bit 1 Parity None 16710 bk DIMSNSTA FRM Page...

Страница 109: ...niqueness of Internet addresses they are assigned by three organizations NIC RIPE and APNIC DOM These organizations assign a globally unique network number to each network that wants to connect to the...

Страница 110: ...600 1 703 742 4777 You can also send e mail to these addresses hostmaster rs internic net host domain network changes and updates action rs internic net computer operations mailserv rs internic net au...

Страница 111: ...addresses are written in dotted decimal notation for example 191 0 0 72 10111111 00000000 00000000 01001000 in binary The IP address field is affected by Classes Subnets Classes Depending on the Class...

Страница 112: ...x to 223 255 254 xxx where xxx represents the device portion Class D This is used as a multicast address The four highest order bits are set to 1110 Multicasting is used to send an IP datagram to all...

Страница 113: ...addition to the user configurable SLIP address Do not use this subnet for your Ethernet network Assigning IP Addresses to a Small Contained Network If you have a small network less than 255 devices t...

Страница 114: ...t Hub 8 TPM is allocated an IPX address automatically by the local IPX router or NetWare File Server This happens approximately 60 seconds after the hub is powered up for the first time You should nev...

Страница 115: ...nline service World Wide Web Site Access the latest networking information on 3Com Corporation s World Wide Web site by entering our URL into your Internet browser http www 3Com com This service featu...

Страница 116: ...ate Telephone Number Australia up to 14400 bps 61 2 9955 2073 Brazil up to 14400 bps 55 11 547 9666 France up to 14400 bps 33 1 6986 6954 Germany up to 28800 bps 4989 62732 188 Hong Kong up to 14400 b...

Страница 117: ...nt To use 3ComForum 1 Log on to CompuServe 2 Type go threecom 3 Press Return to see the 3ComForum main menu France 05 90 81 58 Germany 0130 81 80 63 Hong Kong 800 933 486 Italy 1678 99085 Malaysia 180...

Страница 118: ...t from 3Com If you are unable to receive support from your network supplier technical support contracts are available from 3Com Contact your local 3Com sales office to find your authorized service pro...

Страница 119: ...ephone Number 3Com Latin America U S Headquarters Northern Latin America Argentina Brazil Chile Colombia Mexico Peru Venezuela 408 326 2093 305 261 3266 Miami Florida 541 312 3266 55 11 546 0869 562 6...

Страница 120: ...ll be returned to the sender unopened at the sender s expense To obtain an RMA number call or fax 04 22 97 Country Telephone Number Fax Number U S A and Canada 1 800 876 3266 option 2 408 764 7120 Lat...

Страница 121: ...n failure 4 17 authorized addresses 4 29 Auto Logout screen 5 9 autoconfiguration 3 4 5 6 B before you start 2 4 bitmap 4 7 4 12 BOOTP 5 11 select 5 11 broadcast frames 4 20 4 22 bulletin board servic...

Страница 122: ...stic LEDs 2 1 dialog box Alerts 4 15 Community Polling 4 6 IP Configuration 4 8 MIB II 4 13 Port Configuration 4 26 Port Security 4 29 Resilience 4 35 Security Configuration 4 32 Workgroup 4 38 dimens...

Страница 123: ...5 11 network manager address 5 13 isolate 1 2 isolating a problem 6 1 K keys VT100 5 3 L L information de S curit Importante 9 LAN 1 2 last restart type 5 21 late events 4 25 learn stations 4 27 LEDs...

Страница 124: ...P packet 1 3 parity console port setup 5 15 partition 1 2 4 16 state 4 27 traps 4 27 passwords changing 5 18 creating 5 17 default 5 8 pinouts A 2 polling 4 6 other devices 4 37 port 2 1 attached sta...

Страница 125: ...A 4 Setup screen 5 10 short events 4 24 siting your equipment 2 5 SLIP 1 4 4 10 5 11 address 4 10 5 11 parameters 4 10 5 11 subnet mask 4 10 5 11 SNMP 1 3 4 13 community string 5 17 enabling disablin...

Страница 126: ...rs access level 5 17 changing community string 5 18 changing password 5 18 creating 5 17 default 5 8 deleting 5 19 password 5 17 utilization 4 18 V version number flash EPROM 5 21 hardware 5 21 PROM s...

Страница 127: ...ations therefor for a period of ninety 90 days from the date of purchase from 3Com or its Authorized Reseller 3Com warrants the media containing software against failure during the warranty period 3Co...

Страница 128: ...COM ALSO EXCLUDES FOR ITSELF AND ITS SUPPLIERS ANY LIABILITY WHETHER BASED IN CONTRACT OR TORT INCLUDING NEGLIGENCE FOR INCIDENTAL CONSEQUENTIAL INDIRECT SPECIAL OR PUNITIVE DAMAGES OF ANY KIND OR FOR...

Страница 129: ...ng measures Reorient or relocate the receiving antenna Increase the separation between the equipment and the receiver Connect the equipment into an outlet on a circuit different from that to which the...

Страница 130: ...16710 bk EMCSTATE FRM Page 128 Tuesday October 7 1997 11 38 AM...

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