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20

C

HAPTER

 2: 56K LAN M

ODEM

 F

UNCTIONALITY

 D

ESCRIPTION

Figure 3   

56K LAN Modem Ten Workstation Connection Example

An example of the minimum number of connections is shown in Figure 4.

Figure 4   

56K LAN Modem Minimum Connection Example

Application Sharing over the LAN 

Most operating systems such as Windows 95, 98 and MacOS provide the 
capability for LAN users to share applications, files and printers between 
computers. For example, if only one computer has a Web browser, other LAN 
users may share the browser for accessing the Internet. Note that speed will likely 
be reduced when sharing applications. Refer to your operating system 
documentation for instructions on setting up sharing between users on a LAN.

10 Mbps

Ethernet LAN

OfficeConnect
56KLAN Modem

 PWR AA CD

3 

Com

 Alert

Tx Coll

1 

2 3 4 

LAN  STATUS

OfficeConnect®
56K LAN Modem

OfficeConnect
Hub 8 TPO

Alert

PWR

COLL

PKT

COAX

1

2

3

4

green = link OK, off = link fail, yellow = partition

Port Status

5

6

7

8

1% 2% 3% 6% 12% 25% 50% 80%

Network Utilization

Office

     

Connect

¨

Hub

3 

Com

 RD SD OH

3C886

56K LAN Modem

Содержание 3C886 - OfficeConnect 56K LAN Modem Router

Страница 1: ...http www 3com com OfficeConnect 56K LAN Modem 3C886 User Guide Part No 984 000027 2 Published March 1999 ...

Страница 2: ...ns as set forth in subparagraph c 1 ii for Restricted Rights in Technical Data and Computer Software Clause at 48 C F R 52 227 7013 3Com Corporation 5400 Bayfront Plaza Santa Clara California 95052 8145 For civilian agencies Restricted Rights Legend Use reproduction or disclosure is subject to restrictions set forth in subparagraph a through d of the Commercial Computer Software Restricted Rights ...

Страница 3: ... manufactured by us are safe and without risk provided they are installed used and maintained in good working order in accordance with our instructions and recommendations If any of the following conditions occur isolate the electricity supply and refer to your 3Com reseller If the case or cover is not correctly fitted or if it is damaged If the unit begins to make an odd noise smell or smoke If t...

Страница 4: ... adequate air circulation Install the unit in a clean area that is free from dust or extreme temperatures Allow a clearance gap of at least a 6 inches 150 mm from the rear panel of the unit to allow for cable access Interconnecting directly or by way of other apparatus to ports complying with SELV requirements may produce hazardous conditions on the network Advice should be sought from a competent...

Страница 5: ...cal Networking with Access to a Remote Office 14 Features 15 Ease of Installation and Use 15 High Performance 15 Connectivity 15 Routing 15 Bandwidth Management 15 Remote Management 15 Protocols 16 Error Control and Data Compression 16 Modulation Schemes 16 Security 16 Upgradability 16 Diagnostics 16 Warranty 17 Support for Internet Applications 17 2 56K LAN MODEM FUNCTIONALITY DESCRIPTION Connect...

Страница 6: ...necting to a 10BASE T Ethernet Port 30 Connecting to Another Ethernet Hub 31 Before You Begin 31 Installing Analog Equipment 32 Installing the Power Cable 32 4 SETTING UP TCP IP FOR WINDOWS AND MACINTOSH TCP IP Setup Using Windows 95 and 98 35 TCP IP Setup Using Windows NT 4 0 38 TCP IP Setup Using Mac OS 7 6 or later 41 TCP IP Setup Using Windows 3 11 42 Setting up TCP IP using MS_TCP 42 5 CONFIG...

Страница 7: ...s 67 Name 67 IP Address and Subnet Mask 67 Local Domain Name 68 Enable DHCP Server 68 Enable NetBIOS Filtering 68 Configuring the LAN Parameters 68 Configuring Modem Control Parameters 69 Understanding Modem Controls 69 Connection Controls 69 Mode Controls 69 Protocol Controls 69 Changing Modem Controls 70 Changing Data Call Parameters 71 Understanding Data Call Parameters 71 Minimum Call Duration...

Страница 8: ...ing the Script Configuration Page 81 Creating a Connection Script 82 Connection Script Command Syntax 82 Using the Configuration Buttons 82 Additional Configuration Buttons 84 8 TROUBLESHOOTING AND MAINTENANCE Checking the Basics 85 Monitoring LEDs 85 Monitoring the ALERT LED 85 Monitoring the LAN Port Status LEDs 86 Evaluating Symptoms and Solutions 86 Finding More Information 90 Contacting Techn...

Страница 9: ...MER B USING THE CUSTOM WEB BROWSER C FACTORY DEFAULTS D SPECIFICATIONS General Specifications 105 Year 2000 Compliance 105 GLOSSARY 3COM CORPORATION LIMITED WARRANTY FCC CLASS B STATEMENT FCC DECLARATION OF CONFORMITY ...

Страница 10: ......

Страница 11: ...n of the 56K LAN Modem s key functionality Chapter 2 A description of the 56K LAN Modem s hardware components Chapter 3 Instructions on setting up TCP IP Chapter 4 Instructions for basic configuration of the 56K LAN Modem software Chapter 5 Instructions for advanced configuration Chapter 6 Information on placing receiving and disconnecting calls Chapter 7 Information on troubleshooting and mainten...

Страница 12: ...abbreviate commands by entering only the uppercase letters and the appropriate value Commands are not case sensitive The words enter and type When you see the word enter in this guide you must type something and then press the Return or Enter key Do not press the Return or Enter key when an instruction simply says type Key names Key names appear in text in one of two ways Referred to by their labe...

Страница 13: ...t to be the practical limit for speed over standard analog phone lines Now the V 90 56K ITU standard provides download speeds of up to 56K 1 And your 56K LAN Modem is software upgradable allowing easy upgrades to new features and enhancements as they become available For further information visit 3Com s 56K web site at http www 3com com 56k Applications The primary applications for the 56K LAN Mod...

Страница 14: ...ontinuing to network locally as shown in Figure 2 Figure 2 Local Networking with Access to a Remote Office LAN OfficeConnect 56K LAN modem Public telephone network Internet Intranet or online service Analog POTS line OfficeConnect ISDN LAN Modem OfficeConnect Hub 8 TPO Alert PWR COLL PKT COAX 1 2 3 4 green link OK off link fail yellow partition Port Status 5 6 7 8 1 2 3 6 12 25 50 80 Network Utili...

Страница 15: ...ting an external analog device Routing IP Routing Dynamic or static IP addresses supplied by your service provider WAN side Dynamic Host Configuration Protocol DHCP server functionality on the LAN which automatically assigns an IP address to a newly attached PC on the IP network Domain Name Service DNS server functionality for the LAN which translates the common alphanumeric name of a device for e...

Страница 16: ...PCP RFC 1332 Network Address Translation NAT between LAN and WAN RFC 1631 Point to Point Tunneling Protocol PPTP Error Control and Data Compression ITU T V 42 ITU T V 42bis MNP 2 5 Modulation Schemes V 90 Backwards compatible with all US Robotics 56K Standards ITU T V 34 ITU T V 34 ITU T V 32bis ITU T V 32 ITU T V 22bis ITU T V 22 ITU T V 23 Bell 212A ITU T V 21 Bell 103 Security PAP CHAP and MS C...

Страница 17: ...Your 56K LAN Modem supports applications that use the User Datagram Protocol UDP and the Transmission Control Protocol TCP This protocol is used primarily by Internet games Look for the latest list of Internet applications and games that interoperate with the LAN Modem at http www remoteaccess 3com com support docs lanmodem welcome html ...

Страница 18: ...18 CHAPTER 1 INTRODUCTION ...

Страница 19: ...of the available 64K network bandwidth Upstream data typically less speed sensitive travels at the standard V 34 rate Further information is available in Appendix A of this User Guide or visit the 56K web site at http www 3com com 56k LAN Side Connection On the LAN side up to four users can connect to the 56K LAN Modem s built in Ethernet hub or up to 25 users may connect to the 56K LAN Modem via ...

Страница 20: ...ample if only one computer has a Web browser other LAN users may share the browser for accessing the Internet Note that speed will likely be reduced when sharing applications Refer to your operating system documentation for instructions on setting up sharing between users on a LAN 10 Mbps Ethernet LAN OfficeConnect 56KLAN Modem PWR AA CD 3 Com Alert Tx Coll 1 2 3 4 LAN STATUS OfficeConnect 56K LAN...

Страница 21: ...ion If you desire you may also restrict access to certain users Note that speed may be affected with multiple users downloading simultaneously Figure 6 Shared Connection to a Remote Site Your 56K LAN Modem is capable of supporting WAN access for up to 25 users However for improved performance it is recommended that no more than four users attempt to share a single connection at one time OfficeConn...

Страница 22: ...r computer you simply launch your Web browser or whichever networking application you like When the 56K LAN Modem receives the information packet requesting access to the WAN it must determine which connection type to use The LAN Modem looks at the destination Network ID destination IP address and subnet mask associated with the packet If the Network ID of the packet matches the Network ID of the ...

Страница 23: ...IPX and NetBEUI can be supported transparently through the tunnel While the LAN Modem supports PPTP it does not play an active role in creating or terminating a tunnel Figure 8 Connection to an Remote Private Network via an ISP 1 9 2 1 6 8 1 5 1 9 2 1 6 8 1 2 192 168 1 4 OfficeConnect 56K LAN Modem 192 168 1 1 Analog POTS line Internet Intranet or online service 3 Com Jack s PC 192 168 1 2 Chrissy...

Страница 24: ...perating systems This software should reside on all workstations that wish to create a tunnel to the tunnel server Follow instructions provided for installation and set up For Windows Dial Up Networking Users If you are using Windows Dial Up Networking version 1 2 or higher the basic set up steps are as follows Refer to Windows user documentation for details Install the PPTP protocol Create a RAS ...

Страница 25: ... to have access to the remote private LAN will need to create its own tunnel Refer to http www remoteaccess 3com com support docs lanmodem for more information For specific instructions on how to configure a VPN adapter in Windows 98 95 or Windows NT refer to Microsoft s Web site at http www microsoft com and then enter PPTP in the search field ...

Страница 26: ...26 CHAPTER 2 56K LAN MODEM FUNCTIONALITY DESCRIPTION ...

Страница 27: ...standards in Canada For a PC a 386 or higher processor is recommended and a 10BASE T Ethernet card is required For an Apple Macintosh computer system 7 6 or later operating system and Open Transport included in System 7 6 or later Built in Ethernet connectivity is provided through an Apple Ethernet port in all Power Macintosh computers A frames capable JavaScript enabled Web browser A Web browser ...

Страница 28: ... the reset button Off indicates the unit has passed the diagnostic test and is working properly Flashes if one or more of the diagnostics have failed or after the unit is placed in firmware download mode and is awaiting firmware upgrade PWR Green Power Indicator Remains lit as long as power is supplied to the unit AA Green Auto Answer Indicates the 56K LAN Modem s answer mode Flashes during an inc...

Страница 29: ...fore You Begin Before you begin you will need the following in addition to the 56K LAN Modem RJ 11 6 pin to RJ 11 6 pin telephone cable which was provided in your modem package Coll Amber Ethernet Collision Status Flashes amber when some collisions are taking place on the Ethernet LAN Off indicates that no collisions are taking place on the Ethernet LAN Ports 1 4 Green Ethernet LAN Port Status On ...

Страница 30: ...eled Line on the 56K LAN Modem s back panel as shown in Figure 11 Figure 11 Analog Cable Connection 2 Connect the other end of the RJ 11 analog cable to a POTS analog wall jack Connecting to a 10BASE T Ethernet Port To connect a computer to the 56K LAN Modem do the following 1 Insert one end of the 10BASE T Ethernet cable into one of the four LAN ports on the back of the 56K LAN Modem as shown in ...

Страница 31: ...an MDI X switch you must use a crossover cable 1 Insert one end of the 10BASE T Ethernet cable into one of the four LAN ports on the back of the LAN Modem as shown in Figure 13 Figure 13 10BASE T Hub to Hub Connection 2 Insert the opposite end of the cable into a 10 BASE T Ethernet port on the other Ethernet hub If you are connecting to an OfficeConnect Hub 8 TPO insert the opposite end of the Eth...

Страница 32: ...device 1 Insert one end of an RJ 11 cable into the port labeled Phone on the back of the 56K LAN Modem as shown in Figure 14 Figure 14 Analog Equipment Connection 2 Insert the other end of the RJ 11 cable into the appropriate RJ 11 port on the analog device Installing the Power Cable To install the power cable 1 Connect the 56K LAN Modem power module cable to the 10 18 VDC power connector on the b...

Страница 33: ...as the unit undergoes a power up self test diagnostic Once completed only the PWR LED and LAN port LED remain lit This completes the 56K LAN Modem installation If you do not have TCP IP installed and set up on your computer refer to Chapter 4 Setting Up TCP IP for Windows and Macintosh If you already have TCP IP installed and set up on your computer refer to Chapter 5 Configuring the 56K LAN Modem...

Страница 34: ...34 CHAPTER 3 HARDWARE DESCRIPTION AND INSTALLATION ...

Страница 35: ...o the appropriate section TCP IP Setup Using Windows 95 and 98 TCP IP Setup Using Windows NT 4 0 TCP IP Setup Using Mac OS 7 6 or later TCP IP Setup Using Windows 3 11 TCP IP Setup Using Windows 95 and 98 Both Windows 95 and 98 provide TCP IP as part of its standard operating system To set up TCP IP for the 56K LAN Modem do the following You may be prompted for your Windows 95 or 98 installation d...

Страница 36: ...otocol and then click Add The Select Network Protocol dialog box appears Figure 18 Select Network Protocol Dialog Box 4 From the Manufacturers list box select Microsoft and then from the Network Protocols list box select TCP IP 5 Click OK 6 From the Network Configuration list box select TCP IP and then click Properties ...

Страница 37: ...Address Dialog Box 8 Most users should select Obtain an IP Address automatically as most LANs utilize dynamic IP addresses If this LAN uses static IP addressing enter the IP address and subnet mask You can obtain this information from your system administrator or ISP 9 Select the Advanced tab The TCP IP Properties Advanced screen opens ...

Страница 38: ...ose the Network dialog box 13 Restart Windows 98 or 95 to let these changes take effect TCP IP Setup Using Windows NT 4 0 Windows NT 4 0 provides TCP IP as part of its standard operating system If you have not already set up TCP IP do the following You will need your Windows NT 4 0 installation CD ROM 1 From the Control Panel double click Network The Network dialog box appears 2 Select the Protoco...

Страница 39: ...ion Window 3 Click Add The Select Network Protocol window appears as shown in Figure 23 Figure 23 Select Network Protocol Window 4 Select TCP IP Protocol and then click OK The following message appears Figure 24 DHCP Message Box 5 Select the appropriate response for your network ...

Страница 40: ...click Continue If you have Remote Access Service RAS installed on your PC after the appropriate files are copied to your PC a message box asks whether or not you would like TCP IP installed for RAS If you select Yes you must select the device you want to access remotely and then click Close 7 After the appropriate files are copied to your PC you will see TCP IP Protocol listed in the Network Proto...

Страница 41: ...et mask 11 Click OK 12 Click Yes to restart your PC and allow the changes to take effect TCP IP Setup Using Mac OS 7 6 or later If you are using Macintosh operating system version 7 6 or later Open Transport OT is provided and installed by default If you did not install OT when first installing your system software perform a custom installation of your system software to add OT version 1 1 or late...

Страница 42: ...ly and then enter the IP address TCP IP Setup Using Windows 3 11 If you are using Windows 3 11 a TCP IP stack may not be provided as part of the operating system If you do not have a TCP IP stack you can use MS_TCP which is provided on the 3Com Companion Programs CD ROM Setting up TCP IP using MS_TCP To set up MS_TCP do the following 1 Install MS_TCP located on the 3Com Companion Programs CD ROM o...

Страница 43: ...click OK 7 From the Install Driver dialog box enter the path to the MS _TCP directory For example if you installed MS_TCP on your C drive in a directory called MS_TCP you would enter C MS_TCP 8 Select MS TCP IP 32 X and then click OK to install 9 After the installation is complete click Close 10 Click OK 11 From the MS TCP IP Configuration dialog box check the Auto Configuration check box and then...

Страница 44: ...44 CHAPTER 4 SETTING UP TCP IP FOR WINDOWS AND MACINTOSH ...

Страница 45: ...mputer Typical Configuration The typical configuration covers the following main steps Figure 31 Main Steps for Typical Configuration Before You Begin Before you configure the 56K LAN Modem you should have already completed the following Installed the hardware as described in Chapter 3 Hardware Description and Installation Installed and set up TCP IP on all the computers you intend to connect to t...

Страница 46: ...iated with your 56K LAN Modem and then click Properties Select the IP Address tab If the radio button labeled Obtain an IP address automatically Windows 95 and 98 or Obtain an IP address from a DHCP server Windows NT 4 0 is selected then your computer has a dynamically assigned IP address You are ready to continue directly with Configuring the 56K LAN Modem for the Typical Configuration If the rad...

Страница 47: ...56K LAN Modem 3 Click Properties and then select the Gateway tab and write down the first IP address in the Installed Gateways list If nothing is entered in the Installed Gateway list enter an IP address that does not belong to any workstation on your LAN but is in the subnet that you have chosen for your LAN Write this IP address down for later use 4 Click on the DNS Configuration tab 5 In the DN...

Страница 48: ...n 4 Enter this series of numbers into the Name Server Address box If you already have existing address es listed add the new address below the last entry 5 Choose File and Close 6 When asked to save your changes do so by choosing Save You may want to rename this configuration so that your previous configuration is not overwritten For Windows 3 11 Users 1 From the Program manager click Network 2 Fr...

Страница 49: ...change its default IP address If this occurs the unit will reset itself and then function as described in this section Regardless of the start page to which your Web browser is set your Web browser will go to the 56K LAN Modem configuration setup screen A welcome message appears as shown in Figure 32 Figure 32 Initial Setup Welcome Window 2 Click Continue A message box appears indicating that the ...

Страница 50: ...ave the fields empty 4 Click Submit A message box indicates that your password has been set The ISP Wizard appears If you do not want to use the ISP Wizard click Abort to reach the 56K LAN Modem main configuration page Refer to Setting Up Additional Service Providers for instructions on configuring your ISP connection manually Note that the ISP Wizard is a helpful step towards confirming the prope...

Страница 51: ...er field enter the telephone number of your ISP If you want to enter another telephone number to connect to your ISP refer to Editing Service Provider Profiles after you have completed this typical installation procedure 9 In the User ID and Password fields enter your user ID and password for your ISP account 10 If your ISP requires a DNS address enter it in the DNS Address field If you are not su...

Страница 52: ...return to the LAN Modem s main configuration page enter the following address in your Web browser s address window http lanmodem Alternatively if you are using the Custom Browser clicking the Configure Modem link takes you directly to this main page The connection established as a result of the ISP Wizard will automatically disconnect after fifteen minutes of inactivity by default To learn more ab...

Страница 53: ... ISP connection From here you can read any new up to date information register your product or perform firmware upgrades as they become available If you have installed the Custom Browser from the 3Com Companion Programs CD ROM access this page at any time by clicking the Updates button from your browser s Links menu bar Otherwise visit the LAN Modem homepage directly at the following URL http www ...

Страница 54: ...tons listed in the left vertical frame as well as textual links from beneath the center graphic Links From the Illustration By clicking on the icons shown in the illustration you may jump to the following locations Service Providers Jumps to the Service Providers page where you may configure connections to an ISP or a private network Workstations Jumps to the Workstation Selection page where you v...

Страница 55: ...s Jumps to the Statistics page where you may view statistics such as system current call last call and service provider Maintenance Jumps to the Maintenance page Here you can reset the 56K LAN Modem as well as enter firmware download mode which allows you to easily download the latest firmware You can also set the Auto Answer ring number from this page Password Jumps to the Password page where you...

Страница 56: ...56 CHAPTER 5 CONFIGURING THE 56K LAN MODEM ...

Страница 57: ...assword Locking the configuration Disabling password protection for the Manual Calling screen Configuring the LAN Modem from a remote location Setting Up Additional Service Providers A service provider is a location outside of your LAN that you would like to access such as an ISP for connecting to the Internet or a private network such as a remote office LAN You can define up to four service provi...

Страница 58: ... to a remote private LAN such as a corporate network For instance if you want to dial into your main office from home in order to access the servers at your office for email printing etc then select private network as the type of additional service provider to configure If the private network provides the option of accessing the Internet through their connection and you want to reach the Internet ...

Страница 59: ...onnection to an ISP do the following 1 From the 56K LAN Modem main page click the Service Providers image Figure 36 ISP Service Provider Selection Window 2 Select New Internet Service Provider from the drop down list box and then click Select The Internet Service Provider Parameters window appears ...

Страница 60: ... waiting Your telephone company should provide this value Note that your telephone will be busy to incoming calls when Call Waiting is disabled The Dial Out Prefix and the Call Waiting Disable values will be automatically applied to both the Telephone Number 1 and Telephone Number 2 fields If you would like to set up one telephone number which does not require a dial prefix then add the appropriat...

Страница 61: ...cted unintentionally as a result of packets generated by your workstations 14 For Enable Intelligent NAT leave the default setting which is Yes in order for the LAN Modem to better support Internet applications and games The LAN Modem delivers all unsolicited TCP UDP packets to the workstation that is currently communicating with the remote host that has generated these packets If you set this fie...

Страница 62: ...es a static IP address and subnet mask In addition you may need the following information depending on your particular network setup Check with your Network Administrator IP address subnet mask of the remote LAN you wish to access Domain name of the remote LAN DNS IP address es Setting Up a Connection to a Remote LAN The following steps allow you to set up a connection to a remote LAN 1 From the 5...

Страница 63: ...an outside line if necessary An example would be dialing 9 for use with a PBX If not required leave this field blank 5 In the Call Waiting Disable Command field enter the appropriate command to disable call waiting Your telephone company should provide this value The Dial Out Prefix and the Call Waiting Disable values will be automatically applied to both the Telephone Number 1 and Telephone Numbe...

Страница 64: ...ISP for users on the LAN If the private network to which you connect has assigned a static IP address to each computer on your LAN then disable NAT 14 Under Miscellaneous if the private network to which you wish to connect requires a static IP address and a subnet mask enter the IP address and the subnet mask in the WAN link fields Otherwise leave these fields empty 15 For Allow Automatic Call Ini...

Страница 65: ...vice provider connections and a particular computer on the LAN do the following 1 From the 56K LAN Modem main page click the Workstations image The Workstation Selection window appears 2 From the Workstation drop down list box select the workstation for which you would like to change the accessible service providers You can modify the associations for your workstation via the following fields Name...

Страница 66: ...ofile page appears 3 Edit the fields as desired For more information on the particular fields refer to the appropriate section Setting Up a Connection to an ISP or Setting Up a Connection to a Private Network or refer to the online help located in the web page s bottom frame 4 When finished click Submit Restricting Access to Service Providers If you wish to restrict a computer s on the LAN from ac...

Страница 67: ... name LANmodem is translated to the IP address 192 168 1 1 IP Address and Subnet Mask The IP address is a unique address which identifies the 56K LAN Modem on a network The default address 192 168 1 1 is a private IP address which will be translated automatically by the 56K LAN Modem for Internet access You should leave the default unless you are certain that this value must be changed The 56K LAN...

Страница 68: ...ed calls to your Service Provider resulting in subsequent charges to your phone bill When this box is checked NetBIOS packets are prevented from initiating an outgoing call but they will be passed if the call is already established If you have no need to perform file or printer sharing over your WAN connection you should enable NetBIOS filtering by checking the box Note that enabling the NetBIOS f...

Страница 69: ...em connects to a remote site The following options are provided Table 5 Connection Controls Mode Controls Mode Controls allow you to define your LAN Modem s operating conditions The following options are provided Table 6 Mode Controls Protocol Controls Protocol Controls allow you to set data correction and error control values The following options are provided Table 7 Protocol Controls Connection...

Страница 70: ...d Service Provider page opens 3 Click the Modem Settings button located at the bottom of the Service Provider s page Note that each service provider up to four has its own associated Modem Settings profile Therefore changes made to one service provider affect only that particular service provider The Modem Controls page opens as shown in Figure 41 Figure 41 Modem Controls Page 4 Choose the modem c...

Страница 71: ...fields Figure 42 Data Call Parameters Window Minimum Call Duration The minimum call duration is the minimum length of a call that must be satisfied before an inactivity timer can begin The default for the minimum call duration is two minutes Disconnecting an Automatic Data Call An automatic data call is made by the LAN Modem automatically due to activity on the LAN an example would be a user launc...

Страница 72: ... Modem will redial a call that is placed using the Manual Call Control screen Acceptable values are between 0 and 255 times Delay Between Redial Attempts When Placing a Manual Call This field designates the length of time in seconds to wait before redialing a manual call Acceptable values are between 4 and 240 seconds Configuring the Data Call Parameters To configure data call parameters do the fo...

Страница 73: ...he WebWizard screen If this occurs you will be prompted to enter your password in order to gain access to the WebWizard What If I Forget My Password If you forget your password you must reset the 56K LAN Modem to the factory default settings which will allow you to enter a new password Note that when the 56K LAN Modem is restored to the factory default settings all configuration changes are lost i...

Страница 74: ... were connected via your local LAN You are not able to browse the Internet when remotely accessing your LAN Modem During a remote configuration of the ISP Wizard clicking the Continue button will not place a call to your ISP to confirm a successful configuration You must close and then re open your Web browser to regain access to the LAN Modem s main configuration page if you wish to perform furth...

Страница 75: ... blank at this time 18 Click Connect Your local computer will dial and establish a connection with your remote LAN Modem 19 Once your call has been established launch a Web browser on your local computer The Web browser attempts to load its default Start Page Click Stop to cancel this procedure 20 Enter the following address in your Web browser s address bar http 192 168 1 1 to go to the remote LA...

Страница 76: ...76 CHAPTER 6 ADVANCED CONFIGURATION ...

Страница 77: ...r example should you have an ISP configured as one of your service providers opening a Web browser such as Netscape or Internet Explorer will cause the LAN Modem to automatically dial and connect to your pre configured ISP Windows 98 and 95 users may need to disable Connect to the Internet as needed in order to bypass the Dial Up Networking Connect To window Refer to Chapter 8 Evaluating Symptoms ...

Страница 78: ...configured do the following Note that for this type of manual call the service provider must supply a dynamic IP address This call profile will remain under TempSvcProvider until you change the settings of these fields 1 From the LAN Modem s home page click Manual Calling The Manual Call Control window appears 2 In the table locate TempSvcProvider 3 Click Place Call 4 Enter the telephone number of...

Страница 79: ...enabled for your LAN Modem to receive an incoming data call Note that Auto Answer is disabled by default Auto Answer The Auto Answer feature allows your LAN Modem to automatically answer an incoming call after a user specified number of rings By default Auto Answer is disabled In this case all incoming calls are routed to any analog equipment connected to the Phone port You can choose to have your...

Страница 80: ...ter how long of an inactivity period enter the number of seconds after which a call should be disconnected due to inactivity This timer is initiated once the minimum call duration is satisfied and no further activity is detected To prevent a data call from being disconnected due to inactivity enter 0 The default for an automatic call is seven minutes The default for a manual call is 15 minutes Usi...

Страница 81: ...ing connection script and click Select If you are creating a new service provider choose New Internet Service Provider or New Private Network and click Select For instructions on creating or editing service provider profiles refer to Chapter 6 Setting Up Additional Service Providers The Service Provider Parameters page opens Review your parameters and make changes if desired 3 Click the Script but...

Страница 82: ...iage return is simulated by the characters M within the quotation marks The maximum length for this string is 64 characters The WaitFor command waitfor string second allows you to designate the text that the script will wait for before proceeding An example of text that you might wait for is the string Username for which you would send your username as a reply If the timeout period elapses before ...

Страница 83: ...e word Login Click OK when finished 10 Enter the maximum number of seconds to wait for the remote server to send the connection request Click OK when finished 11 Click Transmit The Transmit dialog box opens Enter the text that you want to transmit to the remote server An example might be your username or password Click OK when finished Add any additional Transmit or WaitFor text as required Note t...

Страница 84: ...ovides the following configuration buttons located along the bottom of the script text entry window The Submit button saves your script and returns to the Service Provider Parameters page The Reset button restores the last saved version of your connection script The Erase button clears the script window of all text The Back button returns you to the Service Provider Parameters page without saving ...

Страница 85: ...y that the cables are not physically damaged If damage is apparent replace the cable Verify that the power cord is connected to the 56K LAN Modem and an electrical outlet Verify that the analog telephone cable is properly connected to the 56K LAN Modem and the telephone wall outlet Monitoring LEDs If you are experiencing operational inconsistencies you can monitor the ALERT and LAN port status LED...

Страница 86: ...operly Check the Ethernet cable connection and make sure it is inserted properly in a port labeled 1 2 3 or 4 on the back of the 56K LAN Modem and in the Ethernet port on the back of your computer Make sure your Ethernet card is set up properly for example proper drivers are loaded Refer to the documentation provided with your Ethernet card for instructions Upon initial set up communication betwee...

Страница 87: ...b browser If you are using Internet Explorer launch your Web browser Fromthe View menu select Internet Options Enter an address in the Home page address field such as http www 3com com If you are using Netscape launch your Web browser From the Options menu select General Preferences From Browser Starts With select Home Page Location and then enter a URL such as http www 3com com A statically confi...

Страница 88: ...e ALERT LED is not flashing then the LAN Modem is now operating correctly ALERT LED continues to fast flash This may occur as a result of replacing a workstation on the LAN with a new computer The DHCP server has issued all of the available IP addresses and is unable to fulfill a request for a new IP address From another computer attached to the LAN Modem go to the LAN Modem s main configuration p...

Страница 89: ...heck the Current Call Information from the Statistics page for the Reason for call coming up If the situation persists disconnect each attached LAN device to locate the source of the IP packet generation Or you can turn off Automatic Call Initiation located on each service provider parameter page Some application software does not work properly The application may have an embedded IP address which...

Страница 90: ...ngs listed in Appendix C All user entered parameters are lost To reset the 56K LAN Modem do the following 1 From the 56K LAN Modem s home page select Maintenance 2 Select the type of reset you would like to perform normal or factory Resetting the 56K LAN Modem to the Factory Defaults If you are unable to access the LAN Modem s main page because your computer cannot communicate with the LAN Modem y...

Страница 91: ...LAN Modem System software version number Displays the firmware version of the 56K LAN Modem Boot software version number For internal use only The LAN Modem has been up for Displays the length of time the 56K LAN Modem has been running This timer is cleared when the unit is power cycled or reset Date Month Day Year Lists the current date of the LAN Modem This date and time is based on the computer...

Страница 92: ...ason for call coming up Indicates how the call was placed and which workstation placed the call Depending on how the call placed you should see something similar to the following Manual Dial by Workstation A DNS query from Workstation A for http www somedomain com Packet from Workstation A to IP address xxxx Table 10 Current Call Information Description continued Current Call Information Descripti...

Страница 93: ...mation Description Last Call Information Description Table 12 Service Provider information description Service Provider Information Description Number of successful connections Indicates the total number of successful connections to each service provider Number of failed connections Indicates the total number of unsuccessful connections to each service provider Total number of octets received Indi...

Страница 94: ...94 CHAPTER 8 TROUBLESHOOTING AND MAINTENANCE ...

Страница 95: ...ed together using some type of cabling Typically Ethernet cabling is used There are three main types of Ethernet networks 10BASE T 10BASE 2 and 10BASE 5 The 56K LAN Modem supports up to ten 10BASE T connections A 10BASE T Ethernet network is used in small networks with only a few dozen devices closely located The physical connection for a 10BASE T Ethernet network is over a twisted pair cable The ...

Страница 96: ...ther Transmission Control Protocol Internet Protocol TCP IP is becoming the most common software used to accomplish this What is TCP IP TCP IP is a standardized communications protocol that works across LANs and WANs allowing different devices to communicate with each other As its name indicates TCP IP has two main components TCP and IP TCP manages the transfer of data and corrects any errors that...

Страница 97: ... Because of the increasing popularity of the Internet the NIC is running out of permanent IP addresses It is therefore becoming more common to use dynamic IP addresses which are assigned temporarily and then reused instead of static IP addresses which are permanently assigned For example when accessing the Internet your ISP has a pool of IP addresses it uses to provide temporary connections to mul...

Страница 98: ...may have speed limitations What is a modem The word modem is derived from the combination of two words modulator demodulator The main function of a modem is to convert the analog signal of the telephone line into the digital signal required by your computer What is the difference between analog and digital signals Digital information is processed according to two finite states expressed as either ...

Страница 99: ...ion in the downstream path 56K technology can use nearly all of the available 64K network bandwidth Upstream data typically less sensitive travels at the standard V 34 rate of 33 6K Based on encoding rather than modulation the result is download speeds once thought not possible Older V 34 modems treat the PSTN as if it were entirely analog they therefore cannot take advantage of the bandwidth made...

Страница 100: ...100 APPENDIX A NETWORKING PRIMER ...

Страница 101: ... Links The following custom buttons provide direct links to 56K LAN Modem configuration and information Web sites Configure Modem Click here to jump to the 56K LAN Modem configuration main page Dial Hang Up Click here to jump to the 56K LAN Modem s Manual Calling page where you can connect to and disconnect from the service providers you configured Register Modem Click here to jump to the 56K LAN ...

Страница 102: ...rnet Explorer Browser If you already have a version of the Internet Explorer Web browser installed and you would like to install a later customized version you should first uninstall the previous version Also while installing the later version you may be asked to replace the older files It is recommended that you do so To install the custom web browser do the following 1 Insert the 3Com Companion ...

Страница 103: ...uter during initial configuration If communication cannot be established initially the 56K LAN Modem will change its default IP address If this occurs the IP address will be different from the default shown here 192 168 1 1 Subnet Mask 255 255 255 224 DHCP Server Enabled NetBIOS Filtering Disabled Use Data Compression No Use NAT Yes Data Call Timeout Values Minimum Call Duration 2 minutes Automati...

Страница 104: ...104 APPENDIX C FACTORY DEFAULTS ...

Страница 105: ...compliance and 3Com products visit the 3Com Year 2000 web page http www 3com com products yr2000 html Table 14 56K LAN Modem Specifications Network Interface Analog POTS telephone service provided by the telephone company Network analog Connector RJ 11 LAN Interface Ethernet IEEE 802 3 10BASE T standard Physical Dimensions Length 8 66 in 22 0 cm Width 5 44 in 13 8 cm Height 1 56 in 4 0 cm Environm...

Страница 106: ...106 APPENDIX D SPECIFICATIONS ...

Страница 107: ...elephone lines in a limited geographic area are connected to the public telephone network compression Compression is a method of reducing the size of data packets without losing any information If you desire the 56K modem can automatically compress data for PPP calls to improve data transfer times using a compression method called hi fn LZS DHCP Dynamic Host Configuration Protocol DHCP allows a se...

Страница 108: ...tions that are the equivalent of manually lifting a phone receiver taking it off hook and replacing it going on hook PAP Password Authentication Protocol PAP is one of two PPP authentication protocols CHAP is the other An authentication protocol requests information to verify a valid user PAP requests the user s name and password for verification PC TCP PC TCP is a PC version of TCP IP created by ...

Страница 109: ...ogy exploits the digital connections that most Internet and on line service providers use at their end to connect to the PSTN such as a T1 or an ISDN BRI line VPN A virtual private network is a secure private data network that is established over the Internet resulting in cost savings by using local toll free access numbers Also because the existing Internet backbone is used there is less investme...

Страница 110: ...110 GLOSSARY ...

Страница 111: ...indows NT 86 ISP versus Private Network 58 L LAN parameters configuring 67 understanding 67 LEDs description 28 monitoring 85 locking the configuration 73 M Modem Controls changing 69 understanding 69 N NAT configuration for a private network 64 for an ISP 61 NetBIOS filtering 68 network interface 102 103 105 P password changing 73 Password Authentication Protocol PAP 16 PC requirements 27 Phone p...

Страница 112: ...112 ...

Страница 113: ...ming properly with regard to such date data on and after January 1 2000 provided that all other products used by Customer in connection or combination with the 3Com product including hardware software and firmware accurately exchange date data with the 3Com product with the exception of those products identified at 3Com s Web site http www 3com com products yr2000 html as not meeting this standard...

Страница 114: ...e countries states or provinces do not allow the exclusion or limitation of implied warranties or the limitation of incidental or consequential damages for certain products supplied to consumers or the limitation of liability for personal injury so the above limitations and exclusions may be limited in their application to you When the implied warranties are not allowed to be excluded in their ent...

Страница 115: ... digital PBX party or coin telephone line If this device causes harm to the telephone network the telephone company will notify you in advance that temporary discontinuance of service may be required But if advance notice is not practical the telephone company will notify the customer as soon as possible Also you will be advised of your right to file a complaint with the FCC if you believe it is n...

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