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24

C

HAPTER

2: ISDN LAN M

ODEM

F

UNCTIONALITY

D

ESCRIPTION

One of the protocols which enables a VPN to be created is PPTP. The PPTP protocol
allows for multiple workstations to establish a secure multi-protocol connection to
a remote, private network via a single, locally-dialed ISP account as shown in
Figure 10. Any networking protocols such as IP, IPX and NetBEUI can be supported
transparently through the tunnel. While the ISDN LAN Modem supports PPTP, it
does not play an active role in creating or terminating a tunnel.

Figure 10

Connection to an Remote Private Network via an ISP

The main steps for creating a VPN are as follows. Each step is explained in detail in
subsequent sections.

■

Set up the server side of the tunnel connection

■

Set up the client side of the tunnel connection

■

Initiate a tunnel between client and server using your client software

Setting Up the Server

Side of the Tunnel

In order to establish a tunnel, the client side must be able to dial into a PPTP tunnel
server on the remote private network such as a Windows NT server version 4.0 or
later. If you use Windows NT 4.0, then Service Pack 3 or greater and RAS must be
installed. Also, the protocols required for the private network must be installed on
the PPTP tunnel server. It is recommended that an experienced network
administrator set up the server side. Note that protocols required for the private
network must be installed on each PPTP tunnel client as well as the PPTP tunnel
server.

Setting Up the Client

Side of the Tunnel

In order to establish a tunnel, the client side must have PPTP tunnel client software
such as Windows Dial-Up Networking version 1.3 which includes the required
software VPN adapter or Windows NT operating system with Service Pack 3, or
Network TeleSystem’s TunnelBuilder™ VPN software for Windows 3.11 and
Macintosh operating 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.

From the Edge to the Heart

of the Network.

3

Com

POWER

ISDN

Alert

B1 B2

TX COLL 1 2

3

4

3

Com

LAN STATUS

ISDN LAN Modem

3C892

OK

Corporate

network

Internet Service

Provider

LAN Modem

Tunnel

terminator

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Содержание OfficeConnect 3C892A

Страница 1: ...http www 3com com OfficeConnect ISDN LAN Modem User Guide Part No 984 000026 2 Published January 1999 ...

Страница 2: ...ion 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 Clause at 48 C F R 52 227 19 and the limitations set forth in 3Com Corporation s standard commercial agreement for the software Unpublished right...

Страница 3: ...V SELV Safety Extra Low Voltage is a secondary circuit which is designed and protected so that under normal and single fault conditions the voltage between any two accessible parts does not exceed a safe value 42 2 V peak or 60 V DC There are no user replaceable fuses or user serviceable parts inside the unit If there is a physical problem with the unit that cannot be solved with problem solving a...

Страница 4: ... de l appareil Soyez très prudents pendant toute la durée de l installation et du déplacement de l appareil Placez l appareil près d une prise murale qui doit rester accessible à tout instant Utilisez l adaptateur électrique fourni avec l appareil pour garantir la conformité totale aux normes de sécurité nationales et internationales Si aucun adaptateur n est fourni le câble électrique utilisé doi...

Страница 5: ...s puertos de la unidad aparatos que no cumplan los requisitos de la interfaz en uso Los puertos de la unidad son de los siguientes tipos Puertos con etiqueta ISDN TNV TNV Telecoms Network Voltage es un circuito que en condiciones normales transmite señales de telecomunicación Puertos con etiqueta LAN o Phone SELV SELV Safety Extra Low Voltage es un circuito secundario diseñado para que el voltaje ...

Страница 6: ...tage è un circuito che in normali condizioni di esercizio trasmette segnali di telecomunicazione Porte contrassegnate dalle targhette LAN e Phone SELV SELV Safety Extra Low Voltage è un circuito secondario ideato e protetto in modo tale che in condizioni normali e in caso di un unico guasto la tensione tra due parti accessibili qualsiasi non superi il valore di sicurezza 42 2 V picco o 60 V CC All...

Страница 7: ...Always exercise caution when installing or modifying telephone lines Do not use a telephone which is connected to the unit to report a gas leak in the vicinity of the leak Do not spill food or liquids on the unit If the unit gets wet isolate the electrical supply and contact your 3Com reseller Do not push any objects into the openings of the unit Doing so can cause fire or electric shock by shorti...

Страница 8: ......

Страница 9: ...nection to a Single Location 19 LAN Side Connection 20 Application Sharing over the LAN 20 Call Routing Protocol and IP Address Translation 21 Placing a Call to a Previously Defined Destination 21 Call Routing While No Other Calls Are Connected 21 Call Routing While One Call Is Already Connected 22 Understanding Multilink PPP and BACP BAP 22 What is Multilink PPP 22 What is BACP BAP 22 Multilink P...

Страница 10: ...S AND MACINTOSH TCP IP Setup Using Windows 98 and Windows 95 37 TCP IP Setup Using Windows NT 4 0 40 TCP IP Setup Using Mac OS 7 6 or later 43 TCP IP Setup Using Windows 3 11 44 Setting Up TCP IP Using MS TCP 44 5 CONFIGURING THE ISDN LAN MODEM Typical Configuration 47 Before You Begin 47 You Should Have Done This 47 You Should Have This Information 48 Determine Whether You Use Dynamic or Static I...

Страница 11: ...ng LAN Parameters 69 Name 69 IP Address and Subnet Mask 70 Local Domain Name 70 Enable DHCP Server 70 Enable NetBIOS Filtering 70 Configuring the LAN Parameters 71 Changing Data Call Parameters 71 Understanding Data Call Parameters 71 Minimum Call Duration 72 Disconnecting an Automatic Data Call 72 Disconnecting a Manual Data Call 72 Connect Disconnect Threshold for the Second B Channel 73 Configu...

Страница 12: ...vider 86 Participating in a Temporary Call 87 Placing Multilink PPP Calls 87 Receiving Calls 87 Receiving Data Calls 87 Distinctive Ringing 88 Disconnecting Data Calls 88 Disconnecting Data Calls Manually 88 Disconnecting Calls Automatically Using Timers 89 Minimum Call Duration 89 Idle Timeout 89 Bandwidth on Demand Parameters 89 Connect Disconnect threshold for the second B channel 89 9 TROUBLES...

Страница 13: ... Current Call Information 100 Understanding Last Call Information 101 Understanding Service Provider Information 102 A NETWORKING PRIMER B USING THE CUSTOM BROWSER C ISDN LAN MODEM FACTORY DEFAULTS D ISDN LAN MODEM SPECIFICATIONS Year 2000 Compliance 113 Ring Cadences 114 Tone Definitions 115 Agency Approvals 124 GLOSSARY INDEX WARRANTY AGENCY APPROVALS ...

Страница 14: ......

Страница 15: ... are looking for Turn to An overview of the ISDN LAN Modem Chapter 1 An explanation of the ISDN LAN Modem s key functionality Chapter 2 A description of the ISDN LAN Modem s hardware components Chapter 3 Instructions on setting up TCP IP Chapter 4 Instructions for the typical configuring of the ISDN LAN Modem software Chapter 5 Instructions for advanced configuration of the ISDN LAN Modem software...

Страница 16: ...l injury Table 3 Text Conventions Convention Description Screen displays This typeface represents information as it appears on the screen Commands The word command means that you must enter the command exactly as shown and then press Return or Enter Commands appear in bold Example To remove the IP address enter the following command SETDefault 0 IP NETaddr 0 0 0 0 The words enter and type When you...

Страница 17: ...small office and home office users can share remote access to the Internet or to a remote office while continuing to network locally Applications The primary application for the ISDN LAN Modem is Local networking with shared access to the Internet and or a remote office LAN Local Networking with Access to the Internet Users can share access to the Internet while continuing to network locally Figur...

Страница 18: ...ote office and the Internet while continuing to network locally Figure 3 Local Networking with Access to a Remote Office and the Internet OfficeConnect ISDN LAN Modem Public telephone network Remote office LAN ISDN BRI line PWR ISDN B1 B2 3 Com Alert Tx Coll 1 2 3 4 LAN STATUS OfficeConnect ISDN LAN Modem OfficeConnect ISDN LAN Modem Public telephone network Remote office LAN ISDN BRI line Interne...

Страница 19: ...Mbps Ethernet connections Two analog voice ports Preferred Provider support which allows simultaneous connections to two different ISPs Routing IP Routing Dynamic or static IP addresses supplied by the ISP WAN side WAN access for up to 25 local workstations on the LAN 10BASE T Dynamic Host Control Protocol DHCP server functionality on the LAN which automatically assigns an IP address to a newly at...

Страница 20: ...P RFC 1661 1662 1663 IETF Multilink PPP RFC 1990 PPTP Point to Point Tunneling Protocol PPTP draft ietf pppext pptp 02 txt IETF Password Authentication Protocol PAP RFC 1334 and Challenge Handshake Authentication Protocol CHAP security RFC 1994 MS CHAP support as defined in Network Working Group Information Memo Microsoft PPP CHAP Extensions S Cob Rev 1 3 March 1997 including only the functionalit...

Страница 21: ...nternet Applications and Games Support for applications that use the User Datagram Protocol UDP and the Transmission Control Protocol TCP The UDP protocol is used primarily by Internet games Look for the latest list of Internet applications and games that interoperate with the ISDN LAN Modem at http www remoteaccess 3com com support docs lanmodem ...

Страница 22: ...16 CHAPTER 1 INTRODUCTION ...

Страница 23: ...ix A Connection Types The ISDN LAN Modem provides WAN side and LAN side connections WAN Side Connection The ISDN LAN Modem allows users to connect to a WAN using either of the following methods at one time Two separate connections to two different locations one per B channel One high speed Multilink PPP connection to a single location combines both B channels Once a WAN connection is established u...

Страница 24: ...o two different locations Once the connection is established up to 25 users can share either connection Figure 6 shows one user connecting to a remote office LAN while another connects to the Internet 10 Mbps Ethernet LAN OfficeConnect ISDN LAN Modem PWR ISDN B1 B2 3 Com Alert Tx Coll 1 2 3 4 LAN STATUS OfficeConnect ISDN LAN Modem OfficeConnect Hub 8 TPO Alert PWR COLL PKT COAX 1 2 3 4 green link...

Страница 25: ... the Internet through the same Internet provider and over the single high speed connection OfficeConnect ISDN LAN Modem Public telephone network Remote office LAN ISDN BRI line Internet Intranet or online service PWR ISDN B1 B2 3 Com Alert Tx Coll 1 2 3 4 LAN STATUS Greg 64 Kbps B1 Peter 64 Kbps B2 Greg 64 Kbps B1 Peter 64 Kbps B2 Greg s PC Marcia s PC Jan s PC Peter s PC OfficeConnect ISDN LAN Mo...

Страница 26: ... one computer has a Web browser the other users on the LAN can use that Web browser to access the Internet Note that speed will likely be reduced when applications are shared Refer to your operating system documentation for instructions on setting up sharing between users on a LAN Murray Lou Mary PWR ISDN B1 B2 3 Com Alert Tx Coll 1 2 3 4 LAN STATUS OfficeConnect ISDN LAN Modem ISDN BRI line Inter...

Страница 27: ... to access the Internet from your computer you simply launch your Web browser or whichever networking application you like When the ISDN LAN Modem receives the information packet requesting access to the WAN it must determine which connection type to use The ISDN LAN Modem looks at the destination Network ID which comprises the destination IP address and subnet mask associated with the packet If t...

Страница 28: ...t is Multilink PPP Multilink PPP is a protocol which combines multiple point to point protocol PPP connections to form a single high bandwidth channel With a BRI line Multilink PPP combines the two 56 Kbps or 64 Kbps ISDN B channels creating a virtual single connection of up to 112 Kbps or 128 Kbps What is BACP BAP BACP BAP is used in conjunction with the Multilink PPP feature and is transparent t...

Страница 29: ...affic on the first B channel reaches a threshold you define In order for you to use Multilink PPP the destination you are calling must also support Multilink PPP For example if you are trying to dial in to the Internet your ISP must also support Multilink PPP in order to successfully place a Multilink PPP call If you attempt to place a Multilink PPP call and the location you are calling does not s...

Страница 30: ...remote private network such as a Windows NT server version 4 0 or later If you use Windows NT 4 0 then Service Pack 3 or greater and RAS must be installed Also the protocols required for the private network must be installed on the PPTP tunnel server It is recommended that an experienced network administrator set up the server side Note that protocols required for the private network must be insta...

Страница 31: ...er side are configured you are ready to create a tunnel The steps required for creating a tunnel vary depending on which client software you are using Refer to the user documentation provided with your PPTP software to determine how to establish a tunnel For instance if you are using Windows Dial Up Networking version 1 3 double click the phone book entry for the VPN Once you attempt to create a t...

Страница 32: ...26 CHAPTER 2 ISDN LAN MODEM FUNCTIONALITY DESCRIPTION ...

Страница 33: ...e For more information refer to Appendix B If you use a different Web browser make sure that it supports frames Netscape 2 1 and later and Internet Explorer 3 0 and later both support frames If you already have a version of the Internet Explorer Web browser installed and would like to install a later version you should first uninstall the previous version Also while installing the later customized...

Страница 34: ...le com for more information Front Panel LED Description The front panel provides the following LEDs Figure 11 ISDN LAN Modem Front Panel The functions of the front panel LEDs are described in Table 4 These front panel LEDs show whether or not the unit is functioning properly and indicate the status of the activity over the 10BASE T and ISDN ports Table 4 Front Panel LED Indicator Definitions LED C...

Страница 35: ... Green B1 B2 Channel Activity Green indicates a data call in progress Amber indicates a voice call in progress If a call is in a dialing state the LED flashes When the call is disconnected the LED goes off Tx Green Ethernet Transmit Status Flashes green when data is being transmitted to the Ethernet LAN from the ISDN LAN Modem Off indicates no data is being transmitted to the Ethernet LAN from the...

Страница 36: ...45 8 pin cable labeled ISDN 10BASE T Ethernet cable 8 pin to 8 pin connectors labeled Ethernet which was provided in the package It is recommended that you use the cable provided If however you choose to use another cable it must be a straight through 10BASE T Ethernet cable It cannot be a crossover cable Power adapter provided you must use the power adapter provided in the package for your geogra...

Страница 37: ...ection 2 Insert the opposite end of the cable into your computer s 10BASE T Ethernet port CAUTION You should only have one computer physically connected to the ISDN LAN Modem during configuration Once you complete the configuration process connect any other computers you would like to have on the LAN and then power cycle each computer If the newly added computers cannot communicate with the ISDN L...

Страница 38: ...have 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 ISDN LAN Modem as shown in Figure 15 Figure 15 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 ...

Страница 39: ...rt on the analog device 3 If you have another analog device to install repeat steps 1 and 2 CAUTION The ISDN LAN Modem is designed to operate with touch tone telephones that collectively do not exceed a ringer equivalence number REN of three per analog phone port The ISDN LAN Modem is designed to provide power 25 mA loop current per phone port and ringing for these devices on up to 61 meters 200 f...

Страница 40: ...ready have TCP IP installed and set up on your computer refer to Chapter 5 Configuring the ISDN LAN Modem Wall Mounting the ISDN LAN Modem There are two slots on the underside of the ISDN LAN Modem which are used for wall mounting You will need two suitable screws Ensure that the wall you are going to use is smooth flat dry and sturdy Make two screw holes which are 150 mm 5 9 in apart Insert the s...

Страница 41: ...ll units above large units Figure 18 Using Stacking Clips 1 Place your existing unit on a flat surface Your clips fit in these positions on the side of the unit Small unit Use these holes 2 Position a clip over one of these holes and push it until it clicks into place Repeat this for the other clip position on the same side 3 Keeping the front of the units aligned rest the bottom of the new unit o...

Страница 42: ...36 CHAPTER 3 HARDWARE DESCRIPTION AND INSTALLATION ...

Страница 43: ...the appropriate section TCP IP Setup Using Windows 98 and Windows 95 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 98 and Windows 95 TCP IP is provided as part of the standard Windows 98 and Windows 95 operating systems To set up TCP IP for the ISDN LAN Modem do the following You may be prompted for your installa...

Страница 44: ...s Figure 21 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 Select the Configuration tab The Network Configuration dialog box appears 7 Select TCP IP and then click Properties If you have multiple TCP IP entries select TCP IP for the Ethernet card associated with the ISDN LAN Modem ...

Страница 45: ...P IP Properties Dialog Box 9 Most users need to select Obtain an IP address automatically because most LANs use dynamic IP addresses If your LAN uses static IP addresses enter the IP address and subnet mask You can obtain this information from your system administrator or ISP 10 Select Advanced and then check the box to set TCP IP as the default protocol ...

Страница 46: ...ox 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 Protocols tab as shown in Figur...

Страница 47: ...ur network 6 You are then prompted to insert your installation CD ROM Insert the Windows NT 4 0 CD ROM and then click Continue For users who have Remote Access Service RAS installed on their 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 ...

Страница 48: ...e 29 Microsoft TCP IP Properties Window 9 From the Adapter drop down list box select the Ethernet card that is connected to the ISDN LAN Modem 10 If this LAN uses dynamic IP addresses select Obtain an IP address from a DHCP server If this LAN uses static IP addresses enter the IP address and subnet mask 11 Click OK 12 Click Yes to restart your PC and allow the changes to take effect ...

Страница 49: ...nd install OT PPP version 1 1 or later To set up TCP IP for Mac do the following 1 From the Apple menu select Control Panels and then select TCP IP The TCP IP dialog box appears Figure 30 TCP IP Dialog Box for Macintosh Computers 2 Select Ethernet or Ethernet built infrom the Connect via drop down list box 3 If this LAN uses dynamic IP addresses select Using DHCP Server from the Configure drop dow...

Страница 50: ...r hard drive 2 From the Program Manager click Network Figure 31 Program Manager Group Box 3 From the Network group box click Network Setup Figure 32 Network Group Box 4 From the Network Setup dialog box click the Drivers button 5 From the Network Drivers dialog box click Add Protocol 6 Select Unlisted or Update Protocol and then click OK 7 From the Install Driver dialog box enter the path to the M...

Страница 51: ... Setup Dialog Box 9 After the installation is complete click Close 10 Click OK 11 From the MS TCP IP Configuration dialog box check the Enable Automatic DHCP Configuration check box and then click OK 12 Restart your PC to allow the changes to take effect ...

Страница 52: ...46 CHAPTER 4 SETTING UP TCP IP FOR WINDOWS AND MACINTOSH ...

Страница 53: ...es you would like to make you may want to look over Chapter 6 Advanced Configuration The configuration windows shown in this chapter may differ slightly from what is displayed on your computer Typical Configuration The typical configuration covers the following main steps Figure 34 Main Steps for Typical Configuration Before You Begin Make sure that you have done the following You Should Have Done...

Страница 54: ...nario If you determine that your computer has a static IP address refer to Setting Up Your Computer If You Have a Static IP Address If your computer has a dynamic IP address you may begin configuring the ISDN LAN Modem directly Refer to Configuring the ISDN LAN Modem for the Typical Configuration Determine your IP address type as follows For Windows 98 95 and NT 4 0 Users From the Start menu selec...

Страница 55: ...lled Gateways box 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 the DNS Configuration tab 5 In the DNS Server Search Order edit box enter the gateway IP address you wrote down as part of the previous step and then clic...

Страница 56: ...rs 1 Insert the 3Com Companion Programs CD ROM into your PC 2 Start the CD and then double click MS_TCP IP Follow the instructions If there are multiple options to choose from leave the default value 3 From the Program manager click Network 4 From the Network group box click Network Setup 5 From the Network Setup dialog box click the Drivers button 6 From the Network Drivers dialog box click Add P...

Страница 57: ...hange its default IP address If this occurs the ISDN LAN Modem 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 ISDN LAN Modem configuration setup A welcome message appears as shown in Figure 35 Figure 35 Initial SetUp Welcome Window 2 Click Continue A message box appears and indicates tha...

Страница 58: ...he same password in the Password repeat field to confirm it If you do not wish to enter a password leave the fields empty 4 Click Submit A message box indicates that your password has been set The Country Selection window appears Figure 37 Country Selection Window 5 Select your country If your country is not listed select Euro ISDN ...

Страница 59: ...g Figure 38 ISDN Telephone Numbers Configuration Window 7 Enter the first telephone number for your ISDN line If the telephone number contains a subaddress enter the telephone number followed by an asterisk and then the subaddress number For example type 020 555 1212 4 8 If you have another telephone number associated with your ISDN line enter it in the second telephone number field Otherwise leav...

Страница 60: ... procedure 12 In the User ID and Password fields enter your user ID and password for your ISP account 13 If your ISP requires a DNS address enter it in the DNS Address es field 14 Specify how you want the bandwidth allocated for this connection Use one B channel When selected one B channel is used to connect to this service provider Add second B channel as required When selected the second B chann...

Страница 61: ...ess a Web site and your computer has a static IP address refer to Configuring a Static IP Address on the ISDN LAN Modem If you experience any other problems refer to Chapter 9 Troubleshooting and Maintenance To return to the LAN Modem s main configuration page click Configure Modem from the Web page Configuring a Static IP Address on the ISDN LAN Modem If you followed the steps in Configuring the ...

Страница 62: ...should register the product and view the ReadMe file which contains the latest information Bookmark this URL for all the latest up to date information about your ISDN LAN Modem http www remoteaccess 3com com support docs lanmodem ISDN LAN Modem Main Page The ISDN LAN Modem main page is shown in Figure 40 From this page you can access configuration parameters as well as place and receive calls Book...

Страница 63: ...e latest call information is displayed Links from the Buttons Home Jumps to the main configuration page of the ISDN LAN Modem ISP Wizard Allows you to configure an ISP If you already configured an ISP using the ISP Wizard and then you run ISP Wizard again the latest ISP will overwrite the previous one To add a second ISP go to the Service Providers page Manual Calling Jumps to the Manual Calling p...

Страница 64: ...58 CHAPTER 5 CONFIGURING THE ISDN LAN MODEM ...

Страница 65: ...providers with workstations Configuring LAN parameters Changing data call parameters Changing call routing Changing country selection Reserving DHCP addresses Changing your password Configuring ISDN line parameters Locking the configuration The configuration windows shown in this chapter may differ slightly from that displayed on your computer Before you Begin Before you begin advanced configurati...

Страница 66: ...etup via the ISP Wizard then you already have one service provider defined Because this is considered a typical configuration some default values have been assumed For example the connection to an ISP is associated with all of the computers connected to your LAN In other words all computers up to 10 on the LAN can connect to that ISP and therefore the Internet You may want to review the profile fo...

Страница 67: ...etwork parameters Figure 42 Direct Connection to a Private Network Setting Up a Connection to an ISP This section describes how to set up your ISDN LAN Modem for access to the Internet Before You Begin Before you begin you will need the following information from your ISP Telephone number s you must dial to access this ISP User ID and password DNS IP address es This information is required only if...

Страница 68: ...ck Select The Internet Service Provider Parameters window appears Figure 44 ISP Parameters Window 4 In the Name field enter a name for this remote destination such as the name of the ISP You may want to add an additional description if you have more than one account with this particular ISP ...

Страница 69: ...hen selected the second B channel is added when the first B channel reaches a certain threshold The threshold default is 60 To change the threshold default refer to Changing Data Call Parameters The second B channel is temporarily removed when you place or answer another call Use two B channels When selected both B channels are used to connect to this service provider that is always use Multilink ...

Страница 70: ...e host that has generated these packets If you set this field to No all unsolicited TCP UDP packets are delivered to the default workstation 17 Click Submit 18 If you would like to configure a connection to another ISP repeat steps 1 17 You can configure up to a total of four remote destinations If you want to password protect the configuration profile of the ISDN LAN Modem refer to Locking and Un...

Страница 71: ...ders 65 Figure 45 Private Network Service Provider Selection Window 2 Select New Private Network from the drop down list box and then click Select The Private Network Parameters window appears Figure 46 Private Network Parameters Window ...

Страница 72: ...primary DNS IP address of your private network in the Primary field If there is a secondary address enter it in the Secondary field 8 Specify Bandwidth Allocation Use one B channel When selected one B channel is used to connect to this service provider Add second B channel as required When selected the second B channel is added when the first B channel reaches a certain threshold The threshold def...

Страница 73: ...e the default setting which is Yes in order for the LAN Modem to support Internet applications and games The ISDN 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 field to No all unsolicited TCP UDP packets are delivered to the default workstation 18 Click Submit 19 If you wou...

Страница 74: ...mputer on the LAN do the following 1 From the ISDN LAN Modem main page click Workstations 2 From the Workstations drop down list box select the Workstation for which you would like to change the accessible service providers 3 Check or clear the boxes of the service providers you would like to associate or disassociate 4 Click Submit If you want to password protect the configuration profile of the ...

Страница 75: ...rkstation access restrictions If you want to password protect the configuration profile of the ISDN LAN Modem refer to Locking and Unlocking the Configuration Configuring Your LAN Parameters This section describes how to configure the parameters of your LAN LAN refers to that section of the network comprising your ISDN LAN Modem and all the computers or other devices attached to it by means of Eth...

Страница 76: ...workstations on the LAN via the Workstation Parameters window For a LAN using dynamic IP addresses if you have Windows 98 or 95 launch Winipcfg exe probably located in your Windows directory click Release All and then click Renew All Local Domain Name The local domain name identifies your LAN LAN refers to the network created by the ISDN LAN Modem and the devices attached to it Enable DHCP Server ...

Страница 77: ...dresses on the computers on the LAN 6 In the Enable NetBIOS filtering field if desired check the box to enable filtering 7 Click Submit If you want to password protect the configuration profile of the ISDN LAN Modem refer to Locking and Unlocking the Configuration Changing Data Call Parameters This section describes how to change the default settings for the data call parameters The data call para...

Страница 78: ...ously with the minimum call duration For example if the minimum call duration is set to 2 minutes and the inactivity timer is set to 30 seconds the call will be connected for at least 2 minutes even if there has been no activity for 30 seconds or more To prevent a data call from being disconnected because of inactivity enter 0 note that you must then manually disconnect the call via the Manual Cal...

Страница 79: ...hput falls below 60 for 20 seconds a B channel is removed Configuring the Data Call Parameters To configure data call parameters do the following 1 From the ISDN LAN Modem main page click Data Call Parameters 2 Specify the minimum call duration 3 Specify the inactivity period for an automatic data call 4 Specify the inactivity period for a manual data call 5 If you specified that you want to use t...

Страница 80: ...lephone number Changing Call Routing To change the call routing setting do the following 1 From the ISDN LAN modem s home page select the telephone graphic The Call Routing window appears Figure 49 Call Routing Window 2 Specify which Phone port if any should handle calls associated with Telephone Number 1 by checking the appropriate phone port box If you would also like to use this telephone numbe...

Страница 81: ...on such as service provider profiles will be erased If you would like to change the country do the following 1 From the ISDN LAN modem main page click Maintenance 2 Select factory reset A message indicates that the ISDN LAN modem is being reset After the reset is complete the Welcome window appears 3 Click Continue A message box appears and indicates that the ISDN LAN Modem clock is being synchron...

Страница 82: ... that enabling selective password protection also allows all users to access the LAN Modem main page which they can use to navigate to the Manual Calling page If users attempt to access any other page except Manual Calling or online help the LAN Modem prompts the user to enter a password To set up selective password protection do the following 1 From the ISDN LAN Modem main page click the Password...

Страница 83: ...phone numbers you can dedicate a telephone number to each device attached to the ISDN LAN modem In the ISDN parameters window enter the telephone numbers assigned to your ISDN line To specify how to route calls using these telephone numbers refer to Changing Call Routing Your ISDN line must support MSN to allow multiple telephone numbers for a single ISDN line Check with your telephone company Wha...

Страница 84: ...r ISDN line enter it in the Telephone Number 3 field 5 If your telephone company requires you to manually enter a TEI select Fixed TEIs and then enter the value provided by your telephone company in the TEI 0 63 field 6 Click Submit If you want to password protect the configuration profile of the ISDN LAN modem refer to Locking and Unlocking the Configuration Locking and Unlocking the Configuratio...

Страница 85: ...DN modem attached to your local PC from the drop down list box and click Next The Make New Connection phone number window will open 5 Enter the phone number of the remote ISDN LAN Modem to which you wish to connect and click Next 6 Click Finish to complete the Make New Connection setup You will now have a new icon for the connection just created 7 Right click this new icon with your right mouse bu...

Страница 86: ...92 168 1 1 mainpage htm to go to the remote ISDN LAN Modem s main configuration page If you previously set your ISDN LAN Modem s IP address to something other than the factory default address enter this IP address in your Web browser s address bar in place of the address shown in the URL above 21 Enter your password if required and then click Submit The ISDN LAN Modem main configuration page appea...

Страница 87: ... Waiting not as a separate service allows you to interrupt a call in order to receive a second incoming call When Call Hold is on communication on a B channel is interrupted and the B channel is released for the incoming call The Call Hold function does not however allow you to put a call on hold and make a second outgoing call it only allows for a second incoming call How to Use Call Waiting To u...

Страница 88: ...it by pressing and releasing the switch hook button What if the call on hold is dropped from the far end If the call on hold is dropped from the far end you will receive no notice If you press and release the switch hook button you will remain on the same call Disconnecting a Call on Hold To disconnect a call on hold you must first make a call on hold active in order to drop it To make the call on...

Страница 89: ...all by call basis The MCID function can be invoked at any time while a call is coming in by pressing 39 on a handset connected to a phone port attached to the ISDN LAN modem Your telephone company switch must support MCID in order for you to use it Check with your telephone company Table 6 Permanent Configuration of CLIR Press these telephone keys To do this 8 1 Enable CLIR for the phone port to w...

Страница 90: ...84 CHAPTER 7 SUPPLEMENTARY VOICE CALL SERVICES ...

Страница 91: ...e number assigned to your ISDN line in order to leave the first telephone number free for voice calls In many instances when voice services are added to an ISDN line they are added only to the first telephone number and not the second telephone number Because of this the ISDN LAN Modem tries to use the second telephone number when available for data calls Call Routing Among Service Providers The I...

Страница 92: ...Placing a Call Manually to a Temporary Service Provider To place a call manually to a service provider that has not been previously 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 ISDN LAN Modem s home page click Manua...

Страница 93: ...e Two B Channels or Add Second B Channel check box on the ISDN LAN Modem s Service Provider Parameters window is checked as described in Setting Up Additional Service Providers in Chapter 5 Also the destination you are calling must also support Multilink PPP For example if you are trying to dial into the Internet your ISP must also support Multilink PPP in order to successfully place a Multilink P...

Страница 94: ...bled To enable do the following 1 Go to the ISDN LAN Modem s main configuration page http 3com OC LANmodem mainpage 2 Click ISDN Parameters 3 Locate Distinctive Ringing and then click the box labeled Enable 4 Click Submit Disconnecting Data Calls You can disconnect data calls manually or use timers to disconnect calls automatically Disconnecting Data Calls Manually To disconnect calls manually do ...

Страница 95: ... is 15 minutes Bandwidth on Demand Parameters You can specify when you want a second B channel to be added automatically based on the utilization of the first B channel Connect Disconnect threshold for the second B channel If you specified that you want to use the second B channel only when needed indicate the percentage of bandwidth on the first B channel which must be reached before the second B...

Страница 96: ...90 CHAPTER 8 PLACING RECEIVING AND DISCONNECTING CALLS ...

Страница 97: ...AN Modem Reviewing statistics CAUTION There are no user serviceable parts inside your ISDN LAN Modem Unauthorized opening of the unit will void the warranty Checking the Basics Before you monitor the LEDs or refer to the section on symptoms and solutions check the following Verify that the cables are not physically damaged If damage is apparent replace the cable Verify that you have a proper 10BAS...

Страница 98: ...e numbers are configured accurately click ISDN Parameters from the WebWizard main page If your telephone numbers are configured correctly check with your telephone company There may be a problem with your ISDN line Monitoring the B Channel LEDs If the ISDN LED is illuminated attempt to place a call and observe the B channel LED s The B1 and B2 LEDs flash amber for a voice call or green for a data ...

Страница 99: ...nnel LED s do not remain green or amber Problem with your computer or application software or incompatible local or toll telephone company Carefully monitor the B1 and B2 LEDs while attempting a call These LEDs flash during call establishment and then remain green or amber once the connection is established If neither LED flashes make sure that your computer is turned on and operational If you are...

Страница 100: ...isconnect the ISDN cable from the ISDN LAN Modem and then connect an analog telephone to one of the phone ports Lift the handset and press 3266 and then replace the handset Reconnect the ISDN cable restart your computer and then launch your Web browser The wrong cable may be connected to the LAN port on the ISDN LAN Modem and your PC Make sure you are using the 8 pin to 8 pin cable labeled Etherne...

Страница 101: ... to the ISDN LAN Modem is lifted a dial tone cannot be heard There may be two active calls to different locations thus using both B channels and leaving no bandwidth for the voice call If there are two independent data calls connected go to Manual calling to disconnect one of the active calls Bandwidth allocation for this service provider may be set to Always use 2 B channels and a call is current...

Страница 102: ...he two B channels of a Multilink PPP call between different routing devices preventing the channels from being linked Refer to Editing Service Provider Profiles in Chapter 6 for details If you configured bandwidth allocation for this service provider to add the second B channel as needed there may not be enough traffic to reach the threshold defined Refer to Changing Data Call Parameters in Chapte...

Страница 103: ...e the period of time your analog modem is set to wait before hanging up the call Sending e mail is occasionally slow when more than one workstation is sending e mail to the same SMTP server A limitation of NAT the SMTP server uses a different port number than the one requested by the workstations sending e mail so the LAN Modem does not know which of the 2 or more workstations to forward the respo...

Страница 104: ...already been done Any active calls however will be terminated A normal reset can also be performed using the reset button located on the back of the ISDN LAN Modem A factory reset restores the ISDN LAN Modem configuration to the factory default settings listed in Appendix C All previously configured settings are cleared and current calls are terminated To reset the ISDN LAN Modem do the following ...

Страница 105: ...nformation Understanding System Statistics The system statistics provided are as follows Table 10 Description of System Statistics System Statistics Description Product ID Displays product identification number such as 3C891 Serial Number Displays the serial number of the ISDN LAN Modem Ethernet Address Displays the MAC address of the ISDN LAN Modem System software version number Displays the firm...

Страница 106: ...bWizard main page If your telephone numbers are configured correctly check with your telephone company There may be a problem with your ISDN line Understanding Current Call Information The current call information provided is as follows Table 11 ISDN Line Information Description Layer 1 status Indicates whether layer 1 of your ISDN line is up or down Layer 2 status Indicates whether layer 2 of you...

Страница 107: ...ice call indicates the port from which the call was placed For outgoing data calls no information is provided Called telephone number Voice or data For an outgoing data call indicates the telephone number dialed to reach the service provider for the current call For an incoming voice or data call indicates the telephone number dialed from the far end For outgoing voice calls no information is prov...

Страница 108: ...or the last incoming voice or data call indicates the telephone number dialed from the far end For outgoing voice calls no information is provided Reason for call going down Voice or data Indicates why the last call was disconnected For example idle timer expired or manual disconnect Reason for call coming up Data Indicates how the call was placed and which workstation placed the call Depending on...

Страница 109: ...e linked 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 ISDN LAN Modem supports four 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 Th...

Страница 110: ... the same telephone line and at significantly faster speeds than the traditional Plain Old Telephone Service POTS or analog service There are two types of lines which provide access to ISDN Basic Rate Interface BRI and Primary Rate Interface PRI The ISDN LAN Modem supports a BRI interface Figure 52 ISDN BRI Line Each BRI telephone line consists of two 64 Kbps bearer or B channels and one 16 Kbps D...

Страница 111: ...ur during transmission It ensures that data is reliably transferred IP routes the data in packets from one location to another across a network using the source and destination information within each data packet to determine routing and destinations Note that TCP IP encompasses more than the two protocols which define its name It comprises a set of software applications that allow various network...

Страница 112: ...er that identifies the sub network to which your computer is connected The subnet mask differentiates the part of the IP address that represents the network and the part that represents the host The bits of the subnet mask are set to 1 if the host should treat the corresponding bit in the IP address as part of the original network number These bits in the mask are set to 0 if the host should treat...

Страница 113: ...N has an IP address assigned to it it is considered to be a numbered link If there is not an IP address assigned to a WAN it is considered to be an unnumbered link What is Subaddressing Subaddressing allows you to assign specific telephone numbers to the devices attached to the analog ports by arbitrarily assigning extensions to your ISDN telephone number to route calls to different devices What i...

Страница 114: ...108 APPENDIX A NETWORKING PRIMER ...

Страница 115: ... The following custom buttons provide direct links to ISDN LAN Modem configuration and information Web sites Configure Modem Click here to jump to the ISDN LAN Modem configuration main page Dial Hang Up Click here to jump to the ISDN 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 ISDN LAN Mo...

Страница 116: ...ernet 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 117: ...d Call Routing Calls to Telephone 1 Routed to Phone Port 1 only Calls to Telephone 2 Routed to Phone Port 2 only Data Calls Allowed over all three ISDN telephone numbers CLIR Not restricted allows your telephone number to be displayed on caller ID units Use Data Compression No Use NAT Yes Bandwidth on Demand Connect Disconnect Threshold for 2nd B channel 60 Connect Delay 10 seconds Disconnect Dela...

Страница 118: ...112 APPENDIX C ISDN LAN MODEM FACTORY DEFAULTS ...

Страница 119: ... C 0 to 122 F Relative humidity Up to 90 noncondensing Power Input 240 VAC for 3C891 120 for 3C892 You must use the power supply provided with your ISDN LAN Modem Year 2000 Compliance The OfficeConnect ISDN LAN Modem is Year 2000 compliant Specifically its system clock is capable of accepting and storing dates including and beyond the year 2000 For information on Year 2000 compliance and 3Com prod...

Страница 120: ...rance 1 5 on 3 5 off Germany 1 on 4 off Hong Kong 0 4 on 0 2 off 0 4 on 3 off Indonesia 0 4 on 0 2 off 0 4 on 2 off Ireland 0 4 on 0 2 off 0 4 on 2 off Italy 1 on 4 off Japan 1 on 2 off Korea 1 on 2 off Luxembourg 1 on 4 off Malaysia 0 4 on 0 2 off 0 4 on 2 off Netherlands 1 on 4 off New Zealand 0 4 on 0 2 off 0 4 on 2 off Norway 1 on 4 off Portugal 1 on 5 off Singapore 0 4 on 0 2 off 0 4 on 2 off...

Страница 121: ...n 0 2 off 0 2 on 4 4 off for 45 seconds Configuration positive acknowledgment tone 0 3 on 0 1 off 0 3 on 0 7 off for 5 seconds Configuration negative acknowledgment tone 0 1 on 0 1 off 0 1 on 0 1 off 0 1 on 0 5 off for 5 seconds Call waiting and CLIR enabled confirmation tone 0 3 on 0 1 off 0 3 on 0 7 off for 5 seconds Call Waiting and CLIR disabled confirmation tone 0 1 on 0 1 off 0 1 on 0 1 off ...

Страница 122: ...116 APPENDIX D ISDN LAN MODEM SPECIFICATIONS ...

Страница 123: ...by the ISDN LAN Modem PAP is the other An authentication protocol requests information to verify a valid user CHAP is a stronger authentication method because it uses encryption and may repeatedly request verification of the identity of the user any time after link establishment compression Compression is a method of reducing the size of data packets without losing any information The ISDN modem a...

Страница 124: ...ace 3C891 must be plugged into an NT1 An NT1 is built into the ISDN LAN Modem with the U interface 3C892 PAP Password Authentication Protocol PAP is one of two PPP authentication protocols supported by the ISDN LAN Modem 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 o...

Страница 125: ... UDP is commonly used for Internet games VPN A virtual private network is a secure private data network that is established over the Internet resulting in significant cost savings from using local toll free access numbers Also because the existing Internet backbone is used there is less investment needed in private network infrastructure See also PPTP ...

Страница 126: ...120 GLOSSARY ...

Страница 127: ...ual configuration 78 L LAN parameters configuring 69 understanding 69 LEDs description 28 monitoring 92 locking the configuration 78 M Multilink PPP 22 placing calls 87 N NAT configuration for a private network 67 for an ISP 63 NetBIOS filtering 70 network interface 110 111 113 O online help 98 P password changing 76 Password Authentication Protocol PAP 14 PC requirements 28 Phone port 33 placing ...

Страница 128: ...122 INDEX ...

Страница 129: ...ndard warranty service for software products may be obtained by telephoning 3Com s Corporate Service Center or an Authorized 3Com Service Center within the warranty period Products returned to 3Com s Corporate Service Center must be pre authorized by 3Com with a Return Material Authorization RMA number marked on the outside of the package and sent prepaid insured and packaged appropriately for saf...

Страница 130: ...ports must have a CAT5 cable or better attached Unscreened ISDN cable The phone ports 1 and 2 must be used in conjunction with a 3 turn ferrite This product carries the CE certification mark to indicate conformance with the following EU directives LVD Low Voltage Directive Safety 73 23 EEC EMC Electro Magnetic Compatibility Directive 89 336 EEC TTE Telecommunication Terminal Equipment Directive 91...

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