3COM 3C892 User Manual

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OfficeConnect®

ISDN LAN Modem

3C892

User Guide

http://www.3com.com/

Part No. 984/000023-3 Published February1999

3Com Corporation 5400 Bayfront Plaza Santa Clara, California 95052-8145

3Com Corporation reserves the right to revise this documentation and to make changes in content from time to time without obligation on the part of 3Com Corporation to provide notification of such revision or change.

3Com Corporation provides this documentation without warranty of any kind, either implied or expressed, including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose. 3Com may make improvements or changes in the product(s) and/or the program(s) described in this documentation at any time.

UNITED STATES GOVERNMENT LEGENDS:

If you are a United States government agency, then this documentation and the software described herein are provided to you subject to the following restricted rights:

For units of the Department of Defense:

Restricted Rights Legend:

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:

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 Unpublished rights reserved under the copyright laws of the United States.

If there is any software on removable media described in this documentation, it is furnished under a license agreement included with the product as a separate document, or in the hard copy documentation. If you are unable to locate a copy, please contact 3Com and a copy will be provided to you.

Unless otherwise indicated, 3Com registered trademarks are registered in the United States and may or may not be registered in other countries.

3Com and OfficeConnect are registered trademarks of 3Com Corporation. 3ComFacts is a service mark of 3Com.

Stac and LZS are registered trademarks and Hi/fn is a trademark of Stac, Inc. Pentium is a registered trademark of Intel. Windows and Windows NT are registered trademarks of Microsoft. Macintosh is a registered trademark of Apple Computer Corporation. IBM is a registered trademark of International Business Machines Corporation.

Other brand and product names may be registered trademarks or trademarks of their respective holders.

3Com Corporation, 1999.

Use, duplication, or disclosure by the Government is subject to restrictions as

Use, reproduction, or disclosure is subject to restrictions set forth in

ABLE OF

BOUT THIS GUIDE

How to Use This Guide 9 Conventions 10 Year 2000 Compliance 10

NTRODUCTION

Introduction 11 Applications 11

Local Networking with Access to the Internet 11 Local Networking with Access to a Remote Office 12 Local Networking with Access to the Internet and a Remote Office 12

Features 13

Ease of Installation and Use 13 High Performance 13 Connectivity 13 Routing 13 Bandwidth Management 14 Remote Management 14 Voice Features 14 Protocols 14 ISDN Standards and Interface 15 Security 15 Upgradability 15 Diagnostics 15 Warranty 15 Internet Applications and Games 15

ONTENTS

ISDN LAN M

UNCTIONALITY DESCRIPTION

Connection Types 17

LAN Side Connection 17

Application Sharing over the LAN 18 WAN Side Connection 18 Two Separate Connections to Different Locations. 18 One High Speed Connection to a Single Location 19

Call Routing Protocol and IP Address Translation 20

ODEM

iii

Placing a Call to a Previously Defined Destination 20

Call Routing While No Other Calls Are Connected 20 Call Routing While One Call Is Already Connected 21

Understanding Multilink PPP and BACP/BAP 21

What is Multilink PPP? 21 What is BACP/BAP? 21

Multilink PPP Configuration Options 22 Understanding Dynamic Bandwidth Allocation 22 Understanding VPNs and PPTP 23

23 Setting Up the Server Side of the Tunnel 23 Setting Up the Client Side of the Tunnel 23

For Windows Dial-Up Networking Users 24

Establishing a Tunnel via the ISDN LAN Modem 24

ARDWARE DESCRIPTION AND INSTALLATION

Package Contents 25 Before You Install the ISDN LAN Modem 25 Front Panel LED Description 26

Back Panel Connector Description 27

Installing the ISDN LAN Modem 27

Before You Begin 27 Installing the ISDN Cable 28 Connecting to a 10BASE-T Ethernet Port 28 Connecting to Another Ethernet Hub 29

Before You Begin 29 Installing Analog Equipment 30 Installing the Power Cable 31

Wall Mounting the ISDN LAN Modem 31 Using Rubber Feet and Stacking Clips 32

ETTING UP

TCP/IP Setup Using Windows 98 and Windows 95 33 TCP/IP Setup Using Windows NT 4.0 36 TCP/IP Setup Using Mac OS 7.6 or later 39 TCP/IP Setup Using Windows 3.11 40

Setting Up TCP/IP Using MS TCP 40

TCP/IP

FOR WINDOWS AND MACINTOSH

ONFIGURING THE

Typical Configuration 43 Before You Begin 43

You Should Have Done This 43 You Should Have This Information 44 Determine Whether You Use Dynamic or Static IP Addresses 44 Setting Up Your Computer If You Have a Static IP Address 45

ISDN LAN M

ODEM

For Windows 98 and 95 Users 45 For Windows NT 4.0 Users 45 For Macintosh Users 46 For Windows 3.11 Users 46

Configuring the ISDN LAN Modem for the Typical Configuration 47

Configuring a Static IP Address on the ISDN LAN Modem 51

ISDN LAN Modem Main Page 52

Links from the Illustration 52 Links from the Buttons 53

DVANCED CONFIGURATION

Before you Begin 55 Setting Up Additional Service Providers 56

ISP versus Private Network 56

When to Select ISP 56 When to Select Private Network 57

Setting Up a Connection to an ISP 57

Before You Begin 57 Setting Up a Connection to the Internet 57

Setting Up a Connection to a Private Network 60

Before You Begin 60 Setting Up a Connection to a Remote LAN 60

Associating Service Providers with Workstations on the LAN 63 Editing Service Provider Profiles 64 Restricting Workstations from Accessing Service Provider(s) 65 Configuring Your LAN Parameters 65

Understanding LAN Parameters 65

Name 65 IP Address and Subnet Mask 66 Local Domain Name 66 Enable DHCP Server 66 Enable NetBIOS Filtering 66

Configuring the LAN Parameters 67 Changing Data Call Parameters 67

Understanding Data Call Parameters 68

Minimum Call Duration 68 Disconnecting an Automatic Data Call 68 Disconnecting a Manual Data Call 68 Connect/Disconnect Threshold for the Second B Channel 69

69 69

Configuring the Data Call Parameters 69 Changing Voice Call Routing 70

Understanding How Calls Are Routed 70

Changing Voice Call Routing 70 Reserving DHCP Addresses 71 Selective Password Protection 71 Changing Your Password 72

Setting Up Your ISDN Line Manually 72 Locking and Unlocking the Configuration 73

73 74

Configuring the ISDN LAN Modem from a Remote Location 74

Configuring the ISDN LAN Modem Remotely via Another LAN Modem 74 Configuring the ISDN LAN Modem Remotely via an ISDN Modem 74

UPPLEMENTARY VOICE CALL SERVICES

Supplementary Voice Services 77

Before You Begin 77

Call Waiting 78

How to Configure Call Waiting 78 How to Use Call Waiting 79

Caller ID 80

Caller ID Date and Time 80

Caller ID Blocking 80

Flexible Calling 81

Configuring FCO on the ISDN LAN Modem 81 Flexible Calling Codes 81

Call Conference (Three-Way Calling) 82

Call Transfer 82 Message Service/Voice Mail 83 Call Forwarding 83

LACING

Placing Calls 85 Placing a Call Automatically 85

Telephone Number Selection for Data Calls 85 Call Routing Among Service Providers 85

Placing a Call Manually 86

Placing a Call Manually to an Existing Service Provider 86

Placing a Call Manually to a Temporary Service Provider 86

Participating in a Temporary Call 87

Placing Multilink PPP Calls 87 Receiving Calls 87

Receiving Data Calls 87

Receiving Voice Calls 88

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

ECEIVING AND DISCONNECTING CALLS

, R

Connect/Disconnect threshold for the second B channel 89

89 89

ROUBLESHOOTING AND MAINTENANCE

Checking the Basics 91 Monitoring LEDs 92

Monitoring the ALERT LED 92 Monitoring the ISDN LED 92 Monitoring the

B Channel LEDs 92 Monitoring the LAN Port Status LEDs 92

Troubleshooting Problems Indicated by LEDs 93 Evaluating Symptoms and Solutions 94 Finding More Information 100 Contacting Technical Support 100 Downloading Firmware to Your ISDN LAN Modem 100 Resetting the ISDN LAN Modem 100

Resetting the ISDN Modem Using a Telephone 100 Reviewing Statistics 101

Understanding System Statistics 101

Understanding ISDN Information 102

Understanding Current Call Information 102

Understanding Last Call Information 103

Understanding Service Provider Information 104

ETWORKING PRIMER

What is a network? 105

What is a LAN? 105

What is a WAN? 105

How does a LAN connect to a WAN? 106

What is a LAN modem? 106

What is ISDN? 106

How do different devices communicate with each other? 107

What is TCP/IP? 107

What is an IP Address? 108

What is a Subnet Mask? 108

Dynamic and Static IP Addresses 108

What is DHCP? 109

What is DNS? 109

What is NAT? 109

What are numbered and unnumbered links? 109

How is overall throughput determined? 109

SING THE CUSTOM WEB BROWSER

Custom Links 111 Using Favorites 112 Installing the Custom Internet Explorer Browser 112

vii

Installing Future Releases of Internet Explorer 112

ISDN LAN M

Year 2000 Compliance 116

RDERING

If You Place Your ISDN Order Through 3Com 117 If You Place Your ISDN Order Through the Telephone Company 117

Placing Your Order 118

Supplementary Voice Features Included with U, EZ-ISDN-1, V and EZ-ISDN 1A 119

119

Limitations of ISDN Ordering Codes U, EZ-ISDN 1, V and EZ-ISDN 1A 119

Simultaneous Voice and Data on the Same Telephone Number 119 Supplementary Voice Services on Telephone Number 1 Only 120 If You Must Have Simultaneous Voice and Data Capability on Both Numbers 120

For Lucent Technologies 5ESS For Siemens EWSD Switches 120 For Nortel DMS-100

What If I Already Have ISDN Service? 121

How S1 Differs from U/EZ-ISDN 1 and V/EZ-ISDN 1A 121

If You Are Currently Using Capability Package S1 and Would Like to Add Supplementary Voice Services 121

If You Are Unable to Have Supplementary Voice Services Added to S1 121

Table of ISDN Ordering Code Capabilities 122

ODEM FACTORY DEFAULTS

ODEM SPECIFICATIONS

ISDN S

ERVICE

Switches 121

Switches 120

LOSSARY

NDEX

3COM C

ORPORATION LIMITED WARRANTY

viii

BOUT

About This Guide provides an overview of this guide, describes guide conventions, and tells you where to look for specific information.

This guide describes how to install and configure the OfficeConnect ISDN LAN Modem and provides descriptions of key applications and networking concepts.

HIS

UIDE

Audience Description

How to Use This Guide

This guide is intended for end users with no presumed level of expertise.

Table 1 shows where to find specific information in this guide.

Table 1

If you 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 Chapter 6 Information on supplementary voice services Chapter 7 Information on placing, receiving and disconnecting calls Chapter 8 Information on troubleshooting and maintenance Chapter 9 Background information on networking Appendix A Information on using the custom browser Appendix B ISDN LAN Modem factory default settings Appendix C Technical specifications for the ISDN LAN Modem Appendix D Instructions for ordering ISDN service for the ISDN LAN Modem Appendix E Definition of terms Glossary

10 A

BOUT THIS GUIDE

Conventions

Table 2 and Table 3 list conventions that are used throughout this guide.

Table 2

Icon Notice Type Description

Table 3

Convention Description

Screen displays

Commands

The words “enter” and “type”

Keyboard key names If you must press two or more keys simultaneously, the key names are

Words in italics Italics are used to:

Notice Icons

Information note Information that describes important features or instructions

Caution Information that alerts you to potential loss of data or potential

Warning Information that alerts you to potential personal injury

damage to an application, system, or device

Text Conventions

This typeface represents information as it appears on the screen. 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

When you see the word “enter” in this guide, you must type something, and then press Return or Enter. Do not press Return or Enter when an instruction simply says “type.”

linked with a plus sign (+). Example:

Press Ctrl+Alt+Del

■

Emphasize a point.

■

Denote a new term at the place where it is defined in the text.

■

Identify menu names, menu commands, and software button names. Examples:

From the Help menu, select Contents. Click OK.

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 products, visit the 3Com Year 2000 Web page:

http: // www.3c om. com/products/yr2000 .h tml

NTRODUCTION

This chapter provides an overview of the OfficeConnect® ISDN LAN Modem, referred to throughout this document as the ISDN LAN Modem.

Introduction

Applications

Local Networking with

Access to the Internet

The ISDN LAN Modem is an easy to install, LAN to WAN modem. For the LAN, it provides four 10BASE-T Ethernet connections— expandable to 25 connections. Refer to Figure 1 for an example showing 10 connections by adding an 8-port 10BASE-T Ethernet hub. For WAN access, it provides a Basic Rate Interface (BRI) ISDN port.

With the ISDN LAN Modem, small office and home office users can share remote access to the Internet or to a remote office while continuing to network locally.

The primary application for the ISDN LAN Modem is:

■ Local networking with shared access to the Internet and/or a remote office

LAN.

Users can share access to the Internet while continuing to network locally.

Network Utilization

3 Com

Office

Connect Hub

Internet/Intranet

online service

PWR COLLPKT COAX1234

Alert

OfficeConnect Hub 8 TPO

Port Status

5678

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

1% 2% 3% 6% 12%25%50% 80%

Figure 1

OfficeConnect ISDN LAN Modem

PWR

ISDN

Alert

Local Networking with Access to the Internet

Coll

LAN STATUS

OfficeConnect™

ISDN LAN Modem

2 3 4

3 Com

ISDN BRI line

Public telephone

network

12 C

HAPTER

1: I

NTRODUCTION

Local Networking with

Access to a Remote

Office

Local Networking with

Access to the Internet

and a Remote Office

Users can share access to a remote office LAN while continuing to network locally.

Remote office

LAN

Figure 2

OfficeConnect ISDN LAN Modem

PWR

ISDN

Alert

LAN STATUS

Coll

3 Com

OfficeConnect™

2 3 4

ISDN LAN Modem

Public telephone

network

ISDN BRI line

Local Networking with Access to a Remote Office

Users can share access to a remote office and the Internet while continuing to network locally.

Figure 3

Internet/Intranet or

online service

OfficeConnect ISDN LAN Modem

LAN STATUS

OfficeConnect™

2 3 4

Coll

PWR

ISDN

Alert

ISDN LAN Modem

3 Com

Public telephone

network

Remote office

LAN

ISDN BRI line

Local Networking with Access to a Remote Office and the Internet

Features 13

Features

Ease of Installation and Use

■ SPID Wizard automatic configuration for telephone company switch and

service profile ID (SPID) numbers.

■ Web-based, point-and-click user interface for configuration and online help.

■ Automatic configuration verification with Internet connection through your

Internet Service Provider (ISP).

■ Firmware updates, user guides and technical notes available on the Web.

High Performance

■ Hi/fn™ LZS

Compression Control Protocol

Protocol

■ Multilink PPP (RFC 1990), which combines two PPP B channel calls to create a

compression, which conforms to these IETF RFCs:

(RFC 1962) and

PPP Stacker LZS Compression

(RFC 1974).

The PPP

virtual, single 128 Kbps network connection.

■ TollMizer, which places a single B channel or a Multilink PPP data call over a

voice connection, saving you the additional charge for a data call.

Connectivity

■ ISDN Basic Rate U interface.

■ Built in four-port 10BASE-T, 10 Mbps Ethernet hub. Up to 25 users can be

supported by connecting to an external eight port-hub.

■ 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-attached computer on an IP

network.

■ Domain Name Service (DNS) server functionality for the LAN, which translates

the common, alphanumeric name of a device to the numeric IP address of a

device.

■ Network Address Translation (NAT) between LAN and WAN, which allows

multiple users on the LAN to share a WAN connection. Note that individual

email accounts may still be maintained at the ISP.

■ Multiplexing traffic from several computers to the same remote destination.

14 C

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1: I

NTRODUCTION

Bandwidth Management

■

Automatic call connection (also known as dial-on-demand routing).

■

Automatic disconnection of idle calls after a specified length of time.

■

Bandwidth on Demand using Bandwidth Allocation Control Protocol (BACP)/Bandwidth Allocation Protocol (BAP) based on a specified threshold.

■

Dynamic bandwidth allocation (DBA), which allows you to place or receive a voice or data call while a Multilink PPP call is active.

■

Manual call connection and disconnection.

Remote Management

■

Remote management using the same Web browser interface.

Voice Features

■

Two analog voice ports for using analog telephone equipment such as touch-tone telephones, fax and answering machines, and analog modems.

■

Flexible call routing to the two analog ports.

■

Caller ID name and telephone display (supports Bellcore GR-30-CORE and SR-TSV-002476 standards).

■

Caller ID Blocking

■

Call Waiting

■

Call Conference (Three-way calling)

■

Call Transfer

■

Call Forward

■

Distinctive Ringing

■

Voice Mail

Protocols

■

IETF PPP (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

Microsoft PPP CHAP Extensions. S. Cob, Rev. 1.3 March 1997

Network Working Group Information Memo:

including only

the functionality that keeps with IETF 1994).

■

IP address negotiation using IPCP (RFC 1332).

■

CCP (RFC 1962, 1974).

■

BACP/BAP (RFC 2125).

■

Network Address Translation between LAN and WAN (RFC 1631).

Features 15

ISDN Standards and Interface

■ Basic Rate ISDN U interface with built-in NT1.

■ Full ISDN signaling support of National ISDN.

■ Compatibility with Lucent, Northern Telecom and Siemens switches.

Security

■ PAP, CHAP and MS-CHAP support on both single-channel and Multilink PPP

calls.

Upgradability

■ Flash memory for field firmware updates.

■ Firmware posted on 3Com’s Web site.

Diagnostics

■ LED status display.

■ Statistics display.

Warranty

■ Lifetime Limited Warranty (refer to the back of this User Guide for details).

Internet 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/welcome.html

16 C

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1: I

NTRODUCTION

ISDN LAN M

ODEM

Connection Types

LAN Side Connection

UNCTIONALITY

ESCRIPTION

This chapter provides a description of the key functionality of the ISDN LAN Modem. It includes the following topics:

■ Connection Types

■ Call Routing Protocol and IP Address Translation

■ Understanding Multilink PPP and Bandwidth on Demand

■ Understanding Dynamic Bandwidth Allocation

■ Understanding PPTP

For a basic understanding of ISDN and networking, refer to Appendix A.

The ISDN LAN Modem provides LAN side and WAN side connections.

On the LAN side, up to four users can connect to the LAN Modem’s built in Ethernet hub, or up to 25 users may connect to the LAN Modem via an external user-supplied hub, enabling users to share files and printers and to use Internet email. An example of ten workstation connections is shown in An example of 10 workstation connections is shown in Figure 4.

10 Mbps Ethernet LAN

OfficeConnect Hub 8 TPO

Port Status

Network Utilization

3 Com

Office

5678

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

1%2% 3% 6% 12%25% 50%80%

Connect Hub

Figure 4

PWR COLLPKT COAX1234

Alert

LAN STATUS

3 Com

OfficeConnect®

Coll

2 3 4

PWR

ISDN

Alert

ISDN LAN Modem

OfficeConnect ISDN LAN Modem

ISDN LAN Modem LAN Connection with 10 Workstations

An example of a single connection is shown in Figure 5.

18 C

2: ISDN LAN M

HAPTER

ODEM FUNCTIONALITY DESCRIPTION

WAN Side Connection

LAN STATUS

2 3 4

Coll

3 Com

Figure 5

OfficeConnect ISDN LAN Modem

PWR

ISDN

Alert

ISDN LAN Modem Single Workstation Connection Example

Application Sharing over the LAN

Most operating systems such as Windows 98 and 95 and Macintosh provide the capability for users on the LAN to share applications, files and printers among computers. For example, if only 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.

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, up to 25 users can share that connection and access the same location simultaneously. If you desire, you can also restrict access to certain users.

Two Separate

Connections to Different

Locations.

An ISDN BRI line has two B channels for transmitting data or voice. Because each B channel is independent, you can connect to 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.

Greg's PC

Marcia's PC

Peter's PC

Jan's PC

Figure 6

OfficeConnect ISDN LAN Modem

PWR

ISDN

Alert

LAN STATUS

OfficeConnect™

2 3 4

Coll

ISDN LAN Modem

Greg—64 Kbps B1

3 Com

Peter— 64 Kbps B2

ISDN BRI line

Two Simultaneous Remote Connections to Different Locations

Internet/Intranet or

online service

Greg 64 Kbps B1

Public telephone

network

Peter 64 Kbps B2

Remote office

LAN

Connection Types 19

OfficeConnect

ISDN LAN Modem

Public telephone

network

Remote office

LAN

Combining both B channels with Multilink provides a single 128 Kbps* connection

PWR

ISDN

3 Com

Alert

Coll

2 3 4

LAN STATUS

64 Kbps B1 64 Kbps B2

128 Kbps B1 & B2

*Without compression.

Jerry's PC

Elaine's PC

George's PC

Cosmo's PC

OfficeConnect™

ISDN LAN Modem

Murray

Lou

Mary

PWR

ISDN

3 Com

Alert

Coll

2 3 4

LAN STATUS

OfficeConnect

ISDN LAN Modem

ISDN BRI line

Internet/Intranet or

online service

Mary's PC

Ted's PC

Lou's PC

Murray's PC

Mary

Murray

Lou

Public telephone

network

OfficeConnect™

ISDN LAN Modem

One High Speed

Connection to a Single

Location

Alternatively, the B channels can be combined using Multilink PPP to form one high-speed connection to a single location. Figure 7 shows a single high-speed connection to a remote office LAN.

Figure 7

One High-Speed Connection to a Single Location

Up to 25 users can share a connection to the same location over the single connection created by Multilink PPP. Figure 8 shows three users on the LAN accessing the Internet through the same Internet provider and over the single high-speed connection.

Figure 8

Shared Connection to the Same Location

20 C

2: ISDN LAN M

HAPTER

ODEM FUNCTIONALITY DESCRIPTION

Call Routing Protocol and IP Address Transl ation

Placing a Call to a

Previously Defined

Destination

This section describes the call routing protocol used by the ISDN LAN Modem and explains how IP addresses are translated.

To illustrate how the ISDN LAN Modem routes outgoing data calls, let us assume that you have set up the following types of service providers.

■

A direct connection to an Internet Service Provider

■

A direct connection to a remote office LAN

■

A direct connection to a remote office LAN from which you can also access the Internet

If all of those connection types are configured on the ISDN LAN Modem and are associated with your computer, the following algorithm is performed for each of the following scenarios.

Call Routing While No Other Calls Are Connected

If the ISDN LAN Modem has not established any calls to a remote destination and you want 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 the Network ID of the packet matches the Network ID of the remote LAN, with or without Internet access, then the call is placed to the remote LAN. If it does not match the Network ID of the remote LAN, with or without Internet access, then the call is routed to the direct ISP connection.

Once the connection is established, any authorized user on the LAN can use this connection. The ISDN LAN Modem will translate each individual user’s IP address into a single, shared IP address (assigned by the remote location), thereby allowing up to 25 users to access the same remote location.

The following example shows three users sharing a connection to the Internet and depicts the IP translation as it occurs in the ISDN LAN Modem.

Understanding Multilink PPP and BACP/BAP 21

198.6.1.1

192.168.1.5

192.168.1.2

192.168.1.4

OfficeConnect® ISDN LAN Modem

192.168.1.1

ISDN BRI line

Internet/Intranet or

online service

PWR

ISDN

3 Com

Alert

Coll

2 3 4

LAN STATUS

Rob's PC

192.168.1.2

Laura's PC

192.168.1.3

Buddy's PC

192.168.1.4

Sally's PC

192.168.1.5

198.6.1.1

IP address assigned by ISP

Translates PC IP addresses to IP address assigned by ISP

ISDN BRI line

Public telephone

network

OfficeConnect™

ISDN LAN Modem

Understanding Multilink PPP and BACP/BAP

Figure 9

IP Address Translation

Call Routing While One Call Is Already Connected

If the ISDN LAN Modem has established a call to a remote destination, for instance, to an ISP, and the ISDN LAN Modem receives more packets, then the ISDN LAN Modem looks at the Network ID of the packets for proper routing. For example, if the Network ID of the packets matches that of the remote LAN and that connection has not yet been established, then the call is placed and the connection is made. If the Network ID does not match and the call type is an Internet access call, then the packets are routed to the ISP.

Note that the ISDN LAN Modem always calls the first configured ISP. If you have configured a second ISP and want to use that one instead, from the ISDN LAN Modem’s configuration home page go to

Workstation Parameters

, select your

computer, and then associate only the ISP that you want to use.

What 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 to the user (that is, it will not be visible to you as it occurs in the background). You need not configure this functionality. When Multilink PPP is negotiated, the Bandwidth Allocation Control Protocol (BACP) negotiates with the peer equipment to determine whether the peer supports BAP. If the peer supports BAP

22 C

2: ISDN LAN M

HAPTER

ODEM FUNCTIONALITY DESCRIPTION

and agrees to use BAP, then the Bandwidth Allocation Protocol (BAP) negotiates the addition and removal of the second B channel with the peer equipment based on a user-defined threshold. A key advantage of BACP/BAP is that it provides a higher probability of establishing a Multilink PPP call during high traffic conditions by providing a specific telephone number for the second B channel to call.

Multilink PPP Configuration Options

When configuring Multilink PPP, you can choose one of the following options from the ISDN LAN Modem’s Service Provider Parameters window.

■

Use One B Channel When this option is configured, only one B channel is used to connect to this

service provider. Multilink PPP is thereby disabled and BACP/BAP is therefore not used.

■

Use Two B Channels When this option is configured, both B channels are always used to connect to

this service provider, regardless of the amount of traffic over each B channel. Note that when this option is selected, the DBA feature does not work because both B channels are being used. To use both DBA and Multilink PPP, select the option

Add Second B Channel as Required

Understanding Dynamic Bandwidth Allocation

■

Add Second B Channel As Required When this option is configured (referred to as bandwidth on demand) only one

B channel is used to connect to this service provider, and the second B channel is automatically added only when the amount of traffic 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 support Multilink PPP, then a single B channel PPP connection is established.

Dynamic Bandwidth Allocation is used in conjunction with Multilink PPP on demand (to use DBA, you should choose

Add Second B Channel As Required

when you configure Bandwidth Allocation). The Dynamic Bandwidth Allocation feature allows you to automatically and temporarily remove one of the B channels and use it either to place or receive a call (voice or data) without disturbing the original call. The only effect on the original call is that it is reduced from a Multilink PPP call to the speed of one B channel.

Once the interrupting call ends, that B channel is automatically returned to the Multilink PPP call. Although throughput is reduced while the interrupting call is active, the reliability of the Multilink PPP call is maintained.

Understanding VPNs and PPTP 23

From the Edge to the Heart

of the Network.

POWER

ISDN

Alert

B2 TX COLL 1 2 3 4

3 Com

LAN STATUS

ISDN LAN Modem

3C892

Internet Service

Provider

LAN Modem

Tunnel

terminator

Corporate

network

Understanding VPNs and PPTP

Virtual private networks (VPN) are private, secure networks created in public networks such as the Internet. A VPN is essentially a secure, private tunnel within the Internet. Since VPN calls are placed through a local ISP, they eliminate long distance charges that would occur from directly dialing to a remote private network.

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

Setting Up the Server

Side of the Tunnel

Setting Up the Client

Side of the Tunnel

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

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 3Com’s NETBuilder, PathBuilder, and Total Control Hub as well as Microsoft’s 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.

In order to establish a tunnel, the client side must have PPTP tunnel client software such as Windows Dial-Up Networking version 1.2 or higher 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.

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HAPTER

ODEM FUNCTIONALITY DESCRIPTION

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 phone book entry for the VPN A RAS phone book entry is similar to other phone book entries except there is

an IP address in the Phone number field. Once the Phone book entry is complete, you can double-click the icon to dial into a server that supports PPTP via any ISP.

Note that protocols required for the private network must be installed on each PPTP tunnel client as well as PPTP tunnel server.

Establishing a Tunnel via

the ISDN LAN Modem

As with PPP, no configuration is required on the LAN Modem to use PPTP. However, you must have an ISP configured on the LAN Modem.

Once the client side and server 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 1.2 or higher, double-click the phone book entry for the VPN.

Once you attempt to create a tunnel, the ISDN LAN Modem detects this attempt and automatically places a call to your ISP. Once the call is connected, a tunnel is established between your workstation and the tunnel server.

You are ready to access a remote private network LAN as if you were connected locally. Each workstation that wishes to have access to the remote private LAN will need to create its own tunnel.

For more information, refer to:

http://www.remoteaccess.3com.com/support/docs/lanmodem/ welcome.html 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.

ARDWARE

ESCRIPTION AND

Package Contents

Before You Install the ISDN LAN Modem

NSTALLATION

The ISDN LAN Modem package includes:

■ OfficeConnect ISDN LAN Modem

■ Power cable with an AC wall transformer

■ RJ -11 ISDN telephone cable

■ 10BASE-T Ethernet cable

■ 3Com Companion Programs CD-ROM

■ OfficeConnect ISDN LAN Modem Getting Started Guide

■ Rubber feet and stacking clips

To install, configure and use the ISDN LAN Modem successfully, you must have the following:

■ Correct ISDN service installed at your location with an available ISDN RJ-11 or

RJ-45 outlet. If you have not yet ordered ISDN service, refer to Appendix E.

■ A JavaScript-enabled and frames-capable Web browser. A Web browser is

provided on the 3Com Companion Programs CD-ROM. (For more information

refer to Appendix B.) If you use a different Web browser, make sure that it

supports frames such as Netscape 2.1 and later and Internet Explorer 3.0 and

later.

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. If you are asked to replace the older files, it is recommended that you do so.

■ A personal computer with TCP/IP and Ethernet connectivity that meets UL

standards in the United States or is certified to CSA 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 (provided as part of system 7.5). Built-in Ethernet connectivity is provided through an Apple Ethernet port in all Power Macintosh computers.

TCP/IP is provided as part of the Windows 98, 95, NT and Macintosh System

■

7.6 and later operating systems. For Windows 3.11 users, TCP/IP software is provided on the 3Com Companion Programs CD-ROM.

You do not have to have available storage space on your computer’s hard drive because nothing is copied as part of the ISDN LAN Modem installation. If you want to copy any programs or documents from the CD-ROMs, ensure that you have available hard disk space.

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Front Panel LED Description

The front panel provides the following LEDs.

Alert

Figure 11

ISDN

B2 TX COLL 1 2 3 4

POWER

ISDN LAN Modem Front Panel

LAN STATUS

ISDN LAN Modem

3C892

3 Com

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

LED Color Description

Alert Amber

POWER Green

ISDN OK

B1/B2 Amber or

Tx Green

Coll Amber

Ports1—4 Green

Front Panel LED Indicator Definitions

Operational Status. Lit during power-on self-test diagnostic or after pressing the reset button.

Off indicates the unit has passed the diagnostic tests and is working properly.

Flashes (four times per second) if one or more of the diagnostics have failed or after the unit is placed in firmware download mode and is waiting for a firmware upgrade.Flashes (once per second) to indicate there are pending voice mail messages.

Power Indicator. Remains lit as long as power is supplied to the unit.

Green D Channel Status. Indicates the status of the ISDN physical

network interface and D channel. Remains lit once the physical ISDN interface and D channel

signaling are synchronized. Off indicates the physical ISDN interface is not synchronized or is

disconnected. Flashes when the physical interface attempts synchronization or

when the ISDN D channel parameters have changed. B1/B2 Channel Activity. Green indicates a data call in progress.

Green

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.

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 ISDN LAN Modem.

Ethernet Collision Status. Flashes amber when some collisions are taking place on the Ethernet LAN.

Off indicates no collisions are taking place on the Ethernet LAN. Ethernet LAN Port Status. On indicates the unit detects the

Ethernet link integrity signal from an attached computer and operation is normal.

Flashes when the LAN Modem is receiving data on that port. Off indicates the unit does not detect the Ethernet link integrity

signal. The Ethernet cable may not be properly connected or the cable may be the wrong polarity.

Installing the ISDN LAN Modem 27

RESET

10-18 VDC

0.8 A MAX

ISDN

1 PHONE 2

LAN

Power

Connector

Reset Button

Two Analog

Telephone Ports

Four Ethernet

10Base-T Connectors

ISDN

BRI Interface

Back Panel Connector

Description

The back panel provides the following components.

Figure 12

ISDN LAN Modem Back Panel

From left to right the back panel consists of the following.

Power: Connect the power module cable to this port.

■

Reset: Press this button for no more than a couple of seconds if you have to

■

reset the unit. This causes the software to restart while maintaining your

configuration profile which includes service provider information and ISDN line

telephone numbers.

Two Analog Telephone Ports: You can connect analog equipment such as a

■

fax machine or telephone to these ports.

Four 10BASE-T Ethernet Ports: Connect the computers to these ports or

■

another Ethernet hub to add up to 25 users.

Installing the ISDN LAN Modem

Before You Begin

ISDN Basic Rate Interface Port: Connect the ISDN cable to this port.

■

This section describes how to do the following.

■ Install the ISDN cable

■ Connect to a 10BASE-T Ethernet LAN

■ Install analog equipment

■ Install the power cable

Before you begin, you will need the following in addition to the ISDN LAN Modem which was provided in the package:

■ RJ-45 (8-pin) to RJ-11 (6-pin) cable labeled ISDN which was provided in the

package.

■ 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).

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ARDWARE DESCRIPTION AND INSTALLATION

Installing the ISDN Cable

To install the ISDN cable: Connect the RJ-45 (8-pin) connector end of the ISDN cable to the port labeled

ISDN on the back panel, as shown in Figure 13.

ISDN

1 PHONE 2

RESET

10-18 VDC

0.8 A MAX

Figure 13

Connect the RJ-11 (6-pin) connector end of the RJ-45/RJ-11 ISDN cable to the

ISDN Cable Connection

RJ-11 or RJ-45 ISDN wall jack.

CAUTION: An NT1 (that is, a network termination device) is built into the ISDN LAN Modem. Never connect the ISDN LAN Modem ISDN port to a standard analog telephone jack or to an external NT1 device. Make sure that the ISDN cable is connected directly to the ISDN jack.

Connecting to a

10BASE-T Ethernet Port

To connect a computer to the ISDN LAN Modem, do the following.

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 14.

ISDN

1 PHONE 2

RESET

10-18 VDC

0.8 A MAX

Figure 14

Insert the opposite end of the cable into your computer’s 10BASE-T Ethernet port.

10BASE-T Ethernet LAN Connection

Installing the ISDN LAN Modem 29

Connecting to Another

Ethernet Hub

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 LAN Modem, refer to “Evaluating Symptoms and Solutions” in Chapter 9.

You can connect to another Ethernet hub to allow up to 25 users to access the WAN. Instructions for adding another Ethernet hub to allow 10 users, a more common scenario, is as follows.

Before You Begin

In addition to an external 10BASE-T Ethernet hub, you will need a 10BASE-T Ethernet cable, which may have been provided with the additional hub. If the hub to which you are connecting your LAN Modem does not have an MDI/X switch, you must use a crossover cable.

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.

ISDN

10-18 VDC

0.8A MAX

RESET

1 PHONE 2

10-18 VDC

0.8A MAX

Figure 15

Insert the opposite end of the cable into a 10 BASE-T Ethernet port on the other

10BASE-T Hub-to-Hub Connection

87654321

MDI/MDIX

Ethernet hub. If you are connecting to an OfficeConnect Hub 8/TPO, insert the opposite end of

the Ethernet cable into port 8 and then set the MDI/X switch to MDI (that is, pressed in). Make sure that the LED associated with that Ethernet port is lit. If it is not, try changing the MDI/X switch setting.

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Installing Analog

Equipment

You can connect an analog touch-tone telephone, answering machine, fax machine, or external analog modem to the ISDN LAN Modem. You will need an RJ-11 to RJ-11 cable that is supplied with the analog device for each analog phone port connection.

To install an analog device:

Insert one end of an RJ-11 cable into one of the two analog ports labeled Phone

on the back of the ISDN LAN Modem, as shown in Figure 16.

ISDN

1 PHONE 2

RESET

10-18 VDC

0.8 A MAX

Figure 16

Insert the other end of the RJ-11 cable into the appropriate RJ-11 port on the

Analog Equipment Connection

analog device. 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 feet) of AWG 26 or heavier AWG wiring. Although the ISDN LAN Modem may function satisfactorily at longer cable distances with more than two attached telephones, proper operation at longer cable distances is not guaranteed in all situations.

Specialized telephone equipment such as speaker phones that draw large amounts of power may not work on the ISDN LAN Modem’s Phone port. Because these devices do not conform to the power specification of the touch-tone telephone standard, their operation is not guaranteed.

Wall Mounting the ISDN LAN Modem 31

Installing the Power

Cable

To install the power cable:

Connect the ISDN LAN Modem power module cable to the 10-18 VDC power

connector on the back panel of the ISDN LAN Modem, as shown in Figure 17.

ISDN

1 PHONE 2

RESET

10-18 VDC

0.8 A MAX

Figure 17

Plug the other end of the power module into a surge-protected standard 110 VAC

Power Cable Connection

wall outlet. The indicator LEDs on the front panel flash momentarily as the unit undergoes a

power-up self-test diagnostic. The Power LED remains lit. This completes the ISDN LAN Modem installation. In addition to the Power LED,

the ISDN LED remains lit indicating the line is configured and ready for use. The LAN port LEDs associated with workstations connected to those ports also remain lit indicating the LAN Modem can communicate with the workstation(s).

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

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 5 7/8 in (150 mm) apart. Insert the screws into the wall, leaving their heads 1/8 in (3 mm) clear of the wall surface.

Remove any connections to the ISDN LAN Modem and position the unit over the screw heads. When the unit is in line, gently push it onto the wall and move it downward to secure. When making connections, be careful not to push the ISDN LAN Modem up and off the wall.

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WARNING: Only wall mount single units. Do not wall mount stacked OfficeConnect

units.

Using Rubber Feet and Stacking Clips

Attach the feet to the marked areas at each corner of the underside of your ISDN LAN Modem to stabilize your ISDN LAN Modem and prevent sliding.

Use the four clips to stack OfficeConnect units together. You can stack up to four units. Stack small units above large units.

1. Place your existing unit on a flat surface. Your clips fit in these positions on the side of the unit.

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 on the clips’ spikes. Push the clips firmly into the new unit until they click into place.

Small unit Use these holes

Large unit Use these holes

Spike

Figure 18

Using Stacking Clips

ETTING

UP TCP/IP

FOR

INDOWS

TCP/IP Setup Using Windows 98 and Windows 95

AND

This chapter describes how to set up the Windows and Macintosh operating system (OS) TCP/IP stack. Your computer must have a TCP/IP stack in order to use the ISDN LAN Modem. If you already have TCP/IP installed and set up on your computer, then go on to Chapter 5. These instructions vary depending upon which operating system you are using. Refer to 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 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 installation disks or CD-ROM.

ACINTOSH

From the Control Panel, double click Network.

The Network dialog box appears.

Figure 19

Click Add.

Network Dialog Box

The Select Network Component Type dialog box appears.

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ETTING UP

TCP/IP

FOR WINDOWS AND MACINTOSH

Figure 20

Select

Select Network Component Type Dialog Box

Protocol

and then click

Add

The Select Network Protocol dialog box appears.

Figure 21

From the Manufacturers list box, select

Protocols list box, select Click OK.

Select Network Protocol Dialog Box

Microsoft

TCP/IP

, and then from the Network

Select the Configuration tab.

The Network Configuration dialog box appears.

Select

TCP/IP

and then click

Properties

If you have multiple TCP/IP entries, select with the ISDN LAN Modem.

for the Ethernet card associated

TCP/IP

TCP/IP Setup Using Windows 98 and Windows 95 35

Figure 22

8 From the TCP/IP Properties dialog box, select the

Figure 23

9 Most users need to select

Network Dialog Box

TCP/IP Properties Dialog Box

Obtain an IP address automatically

IP Address

tab.

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.

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ETTING UP

TCP/IP

FOR WINDOWS AND MACINTOSH

TCP/IP Setup Using Windows NT 4.0

Figure 24

Click OK to close the TCP/IP Properties dialog box.

Click OK to close the Network dialog box.

Restart Windows 98 or 95 to let these changes take effect.

Advanced Parameters of TCP/IP Properties

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.

From the Control Panel, double-click

Network

. The Network dialog box appears. Select the

Protocols

tab, as shown in Figure 25.

TCP/IP Setup Using Windows NT 4.0 37

Figure 25

3 Click

Windows NT Protocols Configuration Window

Add

The Select Network Protocol dialog box appears as shown in Figure 26.

Figure 26

4 Select

Select Network Protocol Dialog Box

TCP/IP Protocol

and then click OK.

The following message appears.

Figure 27

DHCP Message Box

5 Select the appropriate response for your 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 you want to access remotely and then click

, you must select the device

Ye s

7 After the appropriate files are copied to your PC, you will see TCP/IP Protocol listed

in the Network Protocols group box, as shown in Figure 28.

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ETTING UP

TCP/IP

FOR WINDOWS AND MACINTOSH

Figure 28

Click

Network Protocols Group Box

Close.

The Microsoft TCP/IP Properties window appears, as shown in Figure 29.

Figure 29

From the Adapter drop down list box, select the Ethernet card that is connected to

Microsoft TCP/IP Properties Window

the ISDN LAN Modem. If this LAN uses dynamic IP addresses, select

server

. If this LAN uses static IP addresses, enter the IP address and subnet mask.

Click OK.

Ye s

Click

to restart your PC and allow the changes to take effect.

Obtain an IP address from a DHCP

TCP/IP Setup Using Mac OS 7.6 or later 39

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) PPP is provided and installed by default. If you did not install OT PPP when you installed your system software, perform a custom installation of your system software and install OT PPP version 1.1 or later.

To set up TCP/IP for Mac, do the following.

From the Apple menu, select

Control Panels

and then select

TCP/IP

The TCP/IP dialog box appears.

Figure 30

Select

If this LAN uses dynamic IP addresses, select

TCP/IP Dialog Box for Macintosh Computers

Ethernet

Ethernet built in from

the Connect via drop down list box.

Using DHCP Server

from the Configure drop-down list box. If this LAN uses static IP addresses, select from the Configure drop-down list box and then enter the IP address.

Manually

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ETTING UP

TCP/IP

FOR WINDOWS AND MACINTOSH

TCP/IP Setup Using Windows 3.11

Setting Up TCP/IP Using

MS TCP

If you are using Windows 3.11, a TCP/IP stack is not 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.

To set up MS_TCP, do the following.

Install MS_TCP, located on the

3Com Companion Programs

CD-ROM, onto your

hard drive. From the Program Manager, click

Figure 31

From the Network group box, click

Program Manager Group Box

Network

Network Setup

Figure 32

From the Network Setup dialog box, click the

From the Network Drivers dialog box, click

Select

From the Install Driver dialog box, enter the path to the MS TCP directory.

Network Group Box

Unlisted or Update Protocol

Drivers

Add Protocol

and then click OK.

button.

For example, if you installed MS TCP on your C: drive in a directory called MSTCP, you would enter C:\MSTCP.

Select MS TCP/IP-32.X and then click OK to install.

The protocol is added to the list as shown in Figure 33.

TCP/IP Setup Using Windows 3.11 41

Figure 33

9 After the installation is complete, click

10 Click

Network Setup Dialog Box

11 From the MS TCP/IP Configuration dialog box, check the

Configuration

check box and then click OK.

12 Restart your PC to allow the changes to take effect.

Enable Automatic DHCP

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ETTING UP

TCP/IP

FOR WINDOWS AND MACINTOSH

Launch

Web Browser

Run

SPID Wizard

Verify

Configuration

Run

ISP Wizard

ONFIGURING THE

ISDN LAN

Typical Configuration

ODEM

This chapter describes how to configure the ISDN LAN Modem for the typical configuration. The typical configuration covers the basic setup and includes what most users need to get up and running. It provides instructions for setting up your ISDN line and connecting to the Internet. If you followed the instructions in the Getting Started Guide, you have already set up the typical configuration. To see if there are any additional changes 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.

The typical configuration covers the following main steps.

Before You Begin

You Should Have Done

This

Figure 34

Make sure that you have done the following.

Before you configure the ISDN LAN Modem, you should have already done the following:

■ Installed the hardware as described in Chapter 3, “Hardware Description and

Installation.”

■ Installed and set up TCP/IP on all computers you intend to connect to the ISDN

LAN Modem. If TCP/IP is not installed and set up, refer to Chapter 4.

Main Steps for Typical Configuration

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ONFIGURING THE

You Should Have This

Information

ISDN LAN M

ODEM

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 LAN Modem, refer to “Evaluating Symptoms and Solutions” in Chapter 9.

■

Telephone number(s) for your ISDN line provided by your telephone company.

■

If you want to set up a connection to an ISP, you will also need the telephone number to call for access to your ISP, as well as your user name, password and DNS address (if your service provider requires a DNS address to be configured).

Determine Whether You

Use Dynamic or Static IP

Addresses

Your setup procedure will vary depending upon whether you are using a dynamic or a static IP address.

A static IP address is a permanent, manually-assigned address recognized by a remote server, such as a corporate LAN or an ISP. By default, your ISDN LAN Modem dynamically assigns an IP address to each computer. If you have been accessing a remote server via a static IP address prior to installing your ISDN LAN Modem, you may be required to perform additional configuration steps. The first step is to determine your static versus dynamic IP addressing scenario.

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:

■

Settings

and then

Control Panel

. Double-click

From the

Start

Network

menu, select

. Select

TCP/IP

for the

Ethernet card you will attach to the ISDN LAN Modem and then click

Properties

. Select the

address automatically from a DHCP server

dynamic IP address. If the radio button labeled

IP Address

tab. If the radio button labeled

(Windows 98 and 95) or labeled

Obtain an IP address

Obtain an IP

(Windows NT 4.0) is selected, your computer has a

Specify an IP address

selected, your computer has a static IP address.

For Mac Users:

■

TCP/IP

. Choose

From the Apple menu, open

Ethernet

Ethernet built in

Control Panels

. Double-click

from the Connect via drop-down list box, if it is not already chosen. If the Configure drop down list box is set to

Using DHCP Server,

then you are on a dynamic network and are ready to continue directly with “Installing the ISDN LAN Modem.” If Configure is not set to

Using DHCP Server

and you have specific values listed in any of the following fields: IP Address, Subnet mask, Router address, or Name server addr., then your computer has a static IP address.

For Windows 3.11 Users:

■

Network

the

Setup

program group icon. Double-click the

Drivers

button. Highlight the

. If Enable DHCP Configuration is checked, then your computer has a

From the Program Manager, double-click the

Network Setup

Microsoft TCP/IP - 32.X

icon. Click

entry and click

dynamic IP address. If an IP address is entered in the IP Address box, then your computer has a static IP address.

Before You Begin 45

Setting Up Your

Computer If You Have a

Static IP Address

If your computer has a static IP address, you must verify and possibly change some settings on your computer before you begin the configuration procedure. The ISDN LAN Modem must be your gateway and one of your DNS servers. Follow the procedure in the appropriate section to make sure that this is the case. Note that if your computer has a dynamic IP address, this configuration would occur automatically and you can go on to “Configuring the ISDN LAN Modem for the

Typical Configuration.”

These instructions assume that the LAN Modem configuration is set the factory default. If you are moving the LAN Modem from a different LAN, reset the LAN Modem before you begin. To do so, connect a telephone to one the LAN Modem phone ports and then enter **3266# from the keypad.

For Windows 98 and 95 Users

From the Start menu, select

Double-click

Network

Settings

and then select

If you have multiple TCP/IP entries, select

and then

TCP/IP

Control Panel

for the Ethernet card associated

with the ISDN LAN Modem.

Click

Properties

and then select the

Gateway

tab and write down the first IP

address in the Installed 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.

Click the

In the DNS Server Search Order edit box, enter the gateway IP address you wrote

DNS Configuration

down as part of the previous step and then click Click OK to close the TCP/IP Properties box.

Click OK to close the Network control panel.

tab.

Add

You are asked to restart your computer. Click OK.

For Windows NT 4.0 Users

From the

Double-click

Highlight

Click the

menu, select

Start

Network

and then click

TCP/IP

IP Address

Settings

and then

and then select the

Properties

Control Panel

Protocols

tab.

tab and then select the Ethernet card associated with the ISDN

LAN Modem from the Adapter drop-down list box. Write down the IP address in the Installed Gateways box.

Click the

Click

Add

In the TCP/IP DNS Server box, enter the gateway IP address you wrote down previously and then click

DNS

tab.

Add

Click Click

to close the Microsoft TCP/IP Properties dialog box.

to close the Network Control Panel box.

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You are asked to restart your computer. Click OK.

For Macintosh Users

From the Apple menu, open

Control Panels

. Double-click

TCP/IP

Choose

The Configure drop down list box should be set to

Ethernet

from the Connect via drop-down list box, if not already chosen.

Manually

if you are on a static

network. Note the series of numbers entered in the Router address box. Write this number

down. Enter this number into the Name server addr. box. (If you already have existing

address(es) listed, add the new address below the last entry.) Choose

When asked to save your changes, do so by choosing

File

and

Save

You may want to rename this configuration so that your previous configuration is not overwritten.

For Windows 3.11 Users

From the Program manager, click

From the Network group box, click

From the Network Setup dialog box, click the

From the Network Drivers dialog box, double-click

Uncheck

Write down the number in the Default Gateway field.

Enable Automatic DHCP Configuration

Network

Network Setup

Drivers

button.

Microsoft TCP/IP-32

Click OK.

Restart your PC to allow the changes to take effect.

You are now ready to install your ISDN LAN Modem. Refer to “Configuring the

ISDN LAN Modem for the Typical Configuration” to continue.

Configuring the ISDN LAN Modem for the Typical Configuration 47

Configuring the ISDN LAN Modem for the Typical Configuration

To configure the ISDN LAN Modem for the typical configuration, do the following. If you are using static IP addressing, you may need the IP address which you recorded previously in the “Setting Up Your Computer If You Have a Static IP Address”section.

Launch your Web browser.

The ISDN LAN Modem attempts to use its default IP address to communicate with the computer. If communication cannot be established, the ISDN LAN Modem will change 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

Click

Initial SetUp Welcome Window

Continue

A message box appears and indicates that the ISDN LAN Modem clock is being synchronized to the date and time on your workstation.

The Set Password window appears. This password is used to guard access to the ISDN LAN Modem’s configuration program. If you would like to restrict access to the configuration program, select a password and record it in a safe place.

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Figure 36

Enter a password in the Password field and then enter the same password in the

Set Password Window

Password (repeat) field to confirm it. If you do not wish to enter a password, leave the fields empty.

Click

Submit

A message box indicates that your password has been set. The SPID Wizard window appears.

Figure 37

SPID Wizard Window

Configuring the ISDN LAN Modem for the Typical Configuration 49

If you have not ordered your ISDN line, click

Abort

and then Click

Yes

to confirm

that you want to abort the SPID Wizard program. The ISDN LAN Modem

configuration main page appears. After you have an ISDN line installed, refer to

“Setting Up Your ISDN Line Manually”

for instructions on configuring your ISDN

connection manually.

Enter the first telephone number for your ISDN line.

If you have another telephone number associated with your ISDN line, enter it in

the second telephone number field. Otherwise, leave this field blank.

Click

Continue

The SPID Wizard configures the switch type and SPIDs of your ISDN line. When the SPID Wizard is done, the ISP Wizard appears

Figure 38

If you do not want to use the ISP Wizard, click configuration main page appears. Refer to

Providers”

In the Name field, enter the name of your ISP.

In the Telephone Number field, enter the telephone number of your ISP.

ISP Wizard Window

Abort

. The ISDN LAN Modem

“Setting Up Additional Service

for instructions on configuring your ISP connection manually.

If you want to enter another telephone number to connect to your ISP or change these settings, refer to “Editing Service Provider Profiles” after you have completed this typical installation procedure.

In the User ID and Password fields, enter your user ID and password for your ISP

account. If your ISP requires a DNS address, enter it in the DNS Address(es) field.

Specify how you want the bandwidth allocated for this connection.

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■

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 default is 60%. To change the threshold default, refer to “Changing Data

Call Parameters” in Chapter 6. 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 PPP). Note that this prevents another call, data or voice to be placed or received as there is no available bandwidth (that is, the second B channel cannot be temporarily removed).

Specify the B channel rate or select

TollM iz er

Leave the B channel rate set to 64 Kbps unless your telephone company and the locations to which you will be connecting only support 56 Kbps.

TollMizer makes a 56 Kbps data call over a voice circuit allowing you to save the typical cost difference between a voice and data call. Note that the destination you are calling must also support this feature (also referred to as Switched 56 Permissive or Data Over Voice). Check with your telephone company and ISP to make sure that they support TollMizer.

Continue

Click

A call is launched to your ISP. A congratulations message appears when you successfully connect to your ISP. This verifies the correct configuration of your ISDN line and ISP connection.

This configuration covers the typical parameters needed to connect to your ISP. There are additional parameters for this ISP connection which have been set to a typical default. These parameters include Domain Name, Compression, NAT, and WAN Link IP Address. In addition, you can enter a second telephone for connection to your ISP. For information on these parameters and instructions for changing their default values, refer to “Editing Service Provider Profiles.”

Click

to connect to the ISDN LAN Modem Web site where you should

Continue

For all the latest, up to date information about your ISDN LAN Modem, visit

http://www.remoteaccess.3com.com/support/docs/lanmodem/welcome.html

If you cannot access 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 the ISDN LAN Modem for the Typical Configuration 51

Configuring a Static IP

Address on the ISDN

LAN Modem

If you followed the steps in “Configuring the ISDN LAN Modem for the Typical Configuration” and were not able to connect to a Web site and your computer has a static IP address, there may be an incompatibility between the IP address on your computer and the IP address on the ISDN LAN Modem. To correct this, do the following.

Enter the following URL in your Web browser:

From the ISDN LAN Modem’s main configuration page click on the ISDN LAN

http:/ /3c om.oc. la nmodem/

Modem icon in the illustration. The LAN (Ethernet) Parameters page appears. In the IP Address field, enter the default gateway address you entered as described

in “Setting Up Your Computer If You Have a Static IP Address”.

Click

Submit

The ISDN LAN Modem will reset.

Click

Refresh

from your Web browser’s menu bar. The Enter Password window appears. Enter your password and then click

Submit

. The ISDN LAN Modem’s main configuration page appears. Click the

ISP Wizard

button.

You will see the information you entered previously.

Click

Continue

A call is launched to your ISP. A congratulations message appears when you successfully connect to your ISP. This verifies the correct configuration of your ISDN line and ISP connection.

Click

Continue

to go to the ISDN LAN Modem Web site where you should register

the product and view the ReadMe file which contains the latest information.

For all the latest, up to date information about your ISDN LAN Modem, visit

http://www.remoteaccess.3com.com/support/docs/lanmodem/welcome.html

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ISDN LAN Modem Main Page

The ISDN LAN Modem main page is shown in Figure 39. From this page you can access configuration parameters as well as place and receive calls.

Bookmark this page for easy access. Alternatively, if you are using the ISDN LAN Modem Web browser, click

Figure 39

ISDN LAN Modem WebWizard Main Page

Configure Modem

from the

Links

menu bar.

The ISDN LAN Modem main configuration page, also called the WebWizard, provides links to configuration, dialing, statistics screens and help. Once you click to a configuration screen, the bottom frame provides help for that configuration as well as links to other help topics. There are links from the illustration as well as links from the buttons listed in the left vertical frame.

Links from the

Illustration

By clicking on the icons in the illustration, you can jump to the following locations.

■

Service Providers:

Jumps to the Service Providers page where you can

configure a connection to an ISP or a private network.

■

Workstations:

Jumps to the Workstation Selection page where you can view a

workstation’s IP address and can change its associations with service providers.

■

ISDN Parameters:

Jumps to the ISDN Parameters page where you can manually configure ISDN parameters if you prefer not to run the SPID Wizard. Also, supplementary voice services are configurable from this page.

■

LAN Parameters:

Jumps to the LAN Parameters page where you can configure

Ethernet parameters for the ISDN LAN Modem.

■

Data Call Parameters:

Jumps to the Data Call Timeout Parameters page. From here you may set inactivity timers, which allow calls to be disconnected due to network inactivity, keeping telephone usage and Internet access costs down.

■

Call Routing:

Jumps to the Voice Call Routing page where you can configure how you would like voice calls routed to the analog equipment such as a telephone or fax machine attached the ISDN LAN Modem’s Phone ports.

■

Current Call Status:

Jumps to the Call Statistics page where the latest call

information is displayed.

ISDN LAN Modem Main Page 53

Links from the Buttons

■

Home:

■

SPID Wizard:

■

ISP Wizard:

Jumps to the main configuration page of the ISDN LAN Modem.

Activates the SPID Wizard if you need to run it again.

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 page where you can connect

and disconnect calls.

■

Statistics:

Jumps to the Statistics page where you can view statistics regarding

the following: system, ISDN, current call, last call and service provider.

■

Maintenance:

Jumps to the Maintenance page where you can reset the ISDN LAN Modem as well as place the ISDN LAN Modem in firmware download mode in order to download the latest firmware.

■

Password:

Jumps to the Password page restrict access to the LAN Modem

WebWizard by configuring a password.

Context-sensitive help is available in the bottom frame of each configuration screen. To increase the size of the help frame, drag the pane separator up.

This chapter covers the typical configuration steps required for a basic understanding of your ISDN LAN Modem functionality. For further configuration options, refer to Chapter 6, “Advanced Configuration.”

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This chapter describes how to configure advanced settings for the ISDN LAN Modem. For instance, setting up a connection to a private network such as a remote office LAN, and changing default settings. You should follow the typical configuration steps first so that you can have your ISDN line parameters set up before you configure the advanced parameters.

Specifically, this section provides instructions for doing the following.

■ Setting up additional service providers

■ Editing service provider profiles

■ Associating service providers with workstations

■ Configuring LAN parameters

■ Changing data call parameters

■ Changing voice call routing

ONFIGURATION

Before you Begin

■ Reserving DHCP addresses

■ Changing your password

■ Locking the configuration

The configuration windows shown in this chapter may differ slightly from that displayed on your computer.

Before you begin advanced configuration, access the ISDN LAN Modem’s WebWizard. To access the WebWizard (also referred to as the ISDN LAN Modem main configuration page), do the following.

If you are using the ISDN LAN Modem custom Web browser, click Configure Modem to configure additional parameters. If you are not using the ISDN LAN Modem Web browser, enter:

http://3com.oc.lanmodem

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Setting Up Additional Service Providers

A service provider is a location outside of your LAN that you would like to access from your LAN, such as an ISP for access to the Internet or a private network such as a remote office LAN. You can define up to four service providers (that is, remote destinations) on the ISDN LAN Modem.

This section describes how to do the following:

■

Differentiate between an ISP and private network

■

Set up a connection to an ISP

■

Set up a connection to a private network

■

Associate computers on the LAN with selected service providers

■

Edit service provider profiles

If you set up a connection to an ISP as part of the typical (that is, initial) setup (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 on the LAN can connect to that ISP and therefore the Internet. You may want to review the profile for this ISP to see if you want to make any changes. For instructions, refer to “Editing Service

Provider Profiles.”

ISP versus Private

Network

There are two types of service providers you may configure, an ISP and a private network. A description of each follows.

When to Select ISP

Choose ISP when you want to set up a direct connection to the public Internet (via an Internet Service Provider) as shown in Figure 40.

Internet or

online service

ISDN LAN Modem

ISDN outlet

Figure 40

Direct Connection to an ISP

Setting Up Additional Service Providers 57

Direct Connection to Private Network Direct Connection to Private Network

& ISP via Private Network

When to Select Private Network

Select private network when you want to connect directly to a remote, private LAN such as a corporate network, shown in Figure 41. For instance, if you want to dial into your main office from home in order to access the servers at your office for e-mail, printing, and so on, then select private network as the type of service provider you want to configure. If the private network you are dialing into provides the option of accessing the Internet and you want to be able to reach the Internet through your corporate LAN (as opposed to through a direct connection to an ISP), then choose that option when configuring your private network parameters.

Setting Up a Connection

to an ISP

Figure 41

Remote office LAN

ISDN LAN Modem

ISDN outlet

Direct Connection to a Private Network

Internet or

online service

ISDN LAN Modem

ISDN outlet

Remote office LAN

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 your ISP does not provide the IP address dynamically.

Setting Up a Connection to the Internet

To set up a connection to an ISP, do the following. From the ISDN LAN Modem main page, click the

Select

New (Internet Service Provider)

Service Providers

from the drop down list box.

graphic.

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Figure 42

Click

ISP Service Provider Selection Window

Select

The Internet Service Provider Parameters window appears.

Figure 43

In the Name field, enter a name for this remote destination, such as the name of

ISP Parameters Window

the ISP. You may want to add an additional description if you have more than one account with this particular ISP.

In the Telephone Number 1 field, enter the telephone number you must dial in

order to reach your ISP.

Setting Up Additional Service Providers 59

In the Alternate Number field, you can either enter an alternative number or, if

required by your ISP, a second telephone number to establish a Multilink PPP call. To enter a second, alternative telephone number for your ISP that will be

automatically dialed (if, for example the first number is busy) select

Alternate

then enter the telephone number in the Number field. Some ISPs may require that you dial two telephone numbers to establish a

Multilink PPP call. If so, select

Multilink

from the drop down list box and then enter

the telephone number in the Number field. Under Security, enter your User ID and Password.

Under DNS IP Address(es), if your ISP uses static IP addresses (that is, your ISP does

not supply these addresses when a dial up connection is established), enter the primary DNS IP address of your ISP in the Primary field. If there is a secondary address, enter it in the Secondary field.

Specify Bandwidth Allocation.

and

■

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 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:

Under Miscellaneous, specify the B channel rate or select TollMizer.

Leave the B channel rate set to 64 Kbps unless your telephone company and the locations to which you will be connecting require 56 Kbps.

TollMizer makes a 56 Kbps data call over a voice circuit, allowing you to save the typical cost difference between a voice and data call. Note that the destination you are calling must also support this feature (also referred to as Switched 56 Permissive or Data Over Voice). Check with your telephone company and ISP to make sure that they support TollMizer.

Under Miscellaneous, leave the default, NAT enabled, unless you are certain you

want to disable it. With NAT enabled, the ISDN LAN Modem translates IP addresses between the computers on the LAN and the ISP, allowing all LAN users access to a single ISP. Only disable NAT when static IP addresses are provided by your ISP for users on the LAN.

Under Miscellaneous, if the ISP to which you want to connect does not assign a

dynamic IP address and wants you to use a static IP address, enter the IP address and the subnet mask in the WAN link fields. Otherwise, leave these fields empty.

Under Miscellaneous, indicate whether or not you would like to use compression

when transferring data by selecting the appropriate radio button. For Allow Automatic Call Initiation, leave the default setting, which is

Yes

If you select No, you will have to manually launch a call to this service provider every time you want to connect. You may want to set this field to No if your calls

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are being connected unintentionally as a result of packets generated by your workstations.

Setting Up a Connection

to a Private Network

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 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.

In the Default Workstation for Incoming Packets field, specify the workstation to

which all unsolicited TCP/UDP packets should be delivered. Note that if the Enable Intelligent NAT field is set to

Yes

, the ISDN LAN Modem first attempts to deliver the unsolicited TCP/UDP packets to the workstation that is currently communicating with the remote host that has generated these packets. Only if no such workstation is found are the packets delivered to the specified default workstation.

Submit

Click

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 Unlocking the Configuration”.

This section describes how to set up your ISDN LAN Modem for access to a private network such as a remote office LAN.

Before You Begin

Before you begin, you will need the following information from your MIS department:

■

Telephone number(s) you must dial to access this private network

■

User ID and password

■

IP address/subnet mask of the remote LAN you want to access

In addition, you may need the following, depending on your particular network setup. Check with your network administrator.

■

Domain name of the remote LAN you want to access

■

DNS IP address(es)

■

WAN Link IP address

Setting Up a Connection to a Remote LAN

To set up a connection to a remote LAN, do the following. From the ISDN LAN Modem main page, click the

Service Providers

graphic.

The Service Provider Selection window appears.

Setting Up Additional Service Providers 61

Figure 44

2 Select

Private Network Service Provider Selection Window

New Private Network

from the drop-down list box and then click

The Private Network Parameters window appears.

Select

Figure 45

Private Network Parameters Window

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In the Name field, enter a name for this remote destination, such as the name of the location of the office. You may want to add an additional description if you have more than one account with this private network.

In the Telephone Number 1 field, enter the telephone number you must dial in order to reach this remote office.

In the Alternate Number field, you can either enter an alternative number or, if required by this private network, a second telephone number to establish a Multilink PPP call.

To enter a second, alternative telephone number for this private network that will be automatically dialed (if, for example the first number is busy) select

Alternate

and then enter the telephone number in the Number field. If your private network requires that you dial two telephone numbers to establish

a Multilink PPP call, select

Multilink

from the drop-down list box and then enter

the telephone number in the Number field. Under Security, enter your User ID and password. Under DNS IP Address(es), if this private network uses static IP addresses (that is,

these IP addresses are not supplied when a dial-up connection is established) enter the primary DNS IP address of your private network in the Primary field. If there is a secondary address, enter it in the Secondary field.

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 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:

Under Private Network Parameters, enter the IP address, subnet mask and domain

name of the private network. You must enter an IP address and subnet mask. Under Miscellaneous, if you want to be able to access the Internet from this

private network, select the

Yes, I want to access the Internet

radio button.

Otherwise, select the No radio button. Under Miscellaneous, specify the B channel rate or select TollMizer.

Leave the B channel rate set to 64 Kbps unless your telephone company and the locations to which you will be connecting require 56 Kbps.

Setting Up Additional Service Providers 63

Under Miscellaneous, indicate whether or not you would like to use data

compression when transferring data by selecting the appropriate radio button. Under Miscellaneous, leave the default, NAT enabled, unless you are certain you

Under Miscellaneous, if the private network to which you want to connect does

not assign a dynamic IP address and wants you to use a static IP address, enter the IP address and the subnet mask in the WAN link fields. Otherwise, leave these fields empty.

For Allow Automatic Call Initiation, leave the default setting which is

Yes

If you select No, you will have to manually launch a call to this service provider every time you want to connect. You may want to set this field to No if your calls are being connected unintentionally as a result of packets generated by your workstations.

For Enable Intelligent NAT, leave the default setting, which is

in order for the

Yes,

LAN Modem to better 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.

In the Default Workstation for Incoming Packets field, specify the workstation to

which all unsolicited TCP/UDP packets should be delivered. Note that if the Enable Intelligent NAT field is set to

, the ISDN LAN Modem

Yes

first attempts to deliver the unsolicited TCP/UDP packets to the workstation that is currently communicating with the remote host that has generated these packets. Only if no such workstation is found are the packets delivered to the specified default workstation.

Click

Submit

If you would like to configure a connection to another remote office, repeat steps 1 through 18. You can configure up to four remote destinations

Associating Service

Providers with

Workstations on the

LAN

If you want to password protect the configuration profile of the ISDN LAN Modem, refer to “Locking and Unlocking the Configuration.”

Once you have configured the service providers to which you would like to connect, they will be associated with all (up to 25) of the workstations on your LAN by default. You can change these associations if desired. For example, if only one workstation on the LAN should have Internet access, you can associate that ISP connection with one workstation exclusively. This will prevent all other users on the LAN from accessing the Internet from their computers. You can change these associations from the Workstation Parameters window which provides the following information for each workstation:

■

Name:

This field contains the name of the workstation you selected. If you have Macintosh computers on your LAN, the name does not automatically appear in the Name field. You should enter the name for the Macintosh in the Name field.

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■

IP Address:

This field contains the IP address of the workstation you selected. You should not have to make any changes to this field unless you are using static IP addresses (that is, IP addresses which are not dynamically assigned by the ISDN LAN Modem).

■

Service Provider Usage:

Providers

, you can see which service providers can be accessed from this

Enable the use of the following Service

Under

workstation.

■

IP Address Statically Configured on Workstation:

This field allows you to reserve a workstation’s static IP address in the DHCP server to ensure that it is not dynamically assigned to another workstation. It is recommended that you do this if you have workstations on your LAN with static IP addresses and other workstations on the same LAN with dynamic IP addresses.

If you have more than one ISP configured, all calls will be routed to the first ISP listed. To connect to another ISP that you have configured, uncheck the box(es) of the ISP(s) that you do not wish to use at this time.

To change the association between service provider connections and a particular computer on the LAN, do the following.

From the ISDN LAN Modem main page, click

From the Workstations drop down list box, select the Workstation for which you

Workstations.

would like to change the accessible service providers.

Editing Service Provider Profiles

Check or clear the boxes of the service providers you would like to associate or

disassociate.

Click

Submit

If you want to password protect the configuration profile of the ISDN LAN Modem, refer to “Locking and Unlocking the Configuration.”

Edit a service provider profile you have previously configured as follows.

From the ISDN LAN Modem main page, click the

Service Providers

graphic.

A drop down list box appears which contains the names of the service providers you have configured.

Select the name of the service provider connection profile you would like to edit.

The connection profile page appears. Edit the fields as desired.

For more information on the 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 frame at the bottom of the web page.

When finished, click

Submit

Restricting Workstations from Accessing Service Provider(s) 65

Restricting Workstations from Accessing Service Provider(s)

Configuring Your LAN Parameters

Understanding LAN

Parameters

If you want to restrict a workstation(s) on the LAN from accessing a service providers(s), do the following.

click

Workstation Parameters

Select the workstation from which you want to limit access. Clear the check boxes located next to the names of the service provider(s) you

want to restrict from accessing that service provider over the LAN. When finished, click Repeat the previous steps for additional workstation access restrictions.

If you want to password protect the configuration profile of the ISDN LAN Modem, refer to “Locking and Unlocking the Configuration.”

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 Ethernet cabling.) This section describes the LAN parameters and then provides configuration steps.

The LAN Parameters window, shown in Figure 46, contains the following fields.

Submit

from the ISDN LAN Modem home page.

Figure 46

Name

Displays the name for the ISDN LAN Modem. This name is used for DNS. For example, the name LANmodem is translated to its IP address 192.168.1.1.

LAN Parameters Window

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IP Address and Subnet Mask

The IP address is a unique address which identifies the ISDN LAN Modem on a network. The default address (192.168.1.1) is a private IP address which will be translated automatically by the ISDN LAN Modem for Internet access. You should leave the default unless you are certain that this value must be changed.

The ISDN LAN Modem attempts to use its default IP address to communicate with the computer. If communication cannot be established, the ISDN LAN Modem will change its default IP address. If this occurs, the IP address shown in Figure 46 and the subnet mask will be different.

The subnet mask identifies the subnetwork to which your computer is connected. You should leave the default unless you are certain that this value must be changed.

WARNING: If you change the IP address and/or the subnet mask, the ISDN LAN Modem will re-initialize itself to make the new settings work. All calls will be terminated and you may need to reconfigure the IP addresses of the computers connected to the ISDN LAN Modem. For a LAN using static IP addresses, you must manually reconfigure the IP addresses of the workstations on the LAN via the Workstation Parameters window. For a LAN using dynamic IP addresses, if you have Windows 98 or 95, launch directory), click

Release All

and then click

Winipcfg.exe

(probably located in your Windows

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

The ISDN LAN Modem provides DHCP server functionality for the LAN which automatically assigns a network or IP address to a newly attached workstation on an IP network. If another device on your LAN is providing this functionality, or if you are using static IP addresses, then you should disable the DHCP server.

Enable NetBIOS Filtering

For Windows Users: NetBIOS is primarily used by Windows 98, 95 and NT for local file and printer sharing, note that NetBIOS may also be used on other operating systems. This protocol can make spurious DNS requests which can inadvertently cause the LAN Modem to establish unwanted calls to your Service Provider and results in subsequent charges to your phone bill. When this box is checked, NetBIOS packets cannot initiate a 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 ISDN connection, you should enable NetBIOS filtering (that is, check the box). Note that enabling the NetBIOS filter will not affect your ability to share files and printers over your LAN. NetBIOS filtering is disabled by default.

Changing Data Call Parameters 67

Configuring the LAN

Parameters

To configure LAN parameters, do the following.

From the ISDN LAN Modem main page, click the

In the IP Address field, review the default and enter a different IP address if

required. In the Subnet Mask field, review the default and enter a different subnet mask if

required. In the Local Domain Name field, if desired, enter a name you would like to use for

your local domain. This field is not required. If you do not know what to enter, leave it blank.

Check the Enable DHCP server box to enable DHCP or clear the box to disable it.

WARNING:

LAN Modem, the ISDN LAN Modem will re-initialize itself when you submit the changes by clicking terminated, and you may have to reconfigure the IP addresses on the computers on the LAN.

In the Enable NetBIOS filtering field, if desired, check the box to enable filtering.

Click

Submit

If you want to password protect the configuration profile of the ISDN LAN Modem, refer to “Locking and Unlocking the Configuration”.

If you changed the IP address and/or the subnet mask of your ISDN

Submit

. When the re-initialization occurs, all calls are

ISDN LAN Modem

graphic.

Changing Data Call Parameters

This section describes how to change the default settings for the data call parameters. The data call parameters consist of time-out values and a threshold setting for bandwidth on demand.

The timeout values are a useful means of using bandwidth efficiently and keeping telephone usage and Internet access costs down. If there is no activity on a call for an amount of time you specify, the call is disconnected.

The threshold parameters also provide a useful means of using bandwidth efficiently by automatically adding a second B channel only when there is enough traffic to justify the extra bandwidth, and by automatically removing the second B channel when one B channel is sufficient.

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Understanding Data Call

Parameters

The Data Call Parameters window, shown in Figure 47, contains the following fields.

Figure 47

Data Call Parameters Window

Minimum Call Duration

The minimum call duration is the minimum length of a call that is measured and must be satisfied before a call is disconnected. The default for the minimum call duration is 2 minutes.

Disconnecting an Automatic Data Call

An automatic data call is a call made automatically by the LAN Modem because of activity on the LAN to the WAN. An example would be a user launching his or her Web browser. Because the parameters for the call, such as the telephone number and user name, have been previously defined, a call (to an ISP, for example) may be automatically and transparently launched with a click of your Web browser.

You can define the amount of time the LAN Modem should wait before disconnecting this type of data call because of inactivity. The inactivity timer runs simultaneously 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 Calling screen). The default is 30 seconds.

Disconnecting a Manual Data Call

A manual call is established using the

Manual Calling

option from the LAN Modem’s main page. You can define the amount of time the LAN Modem should wait before disconnecting this type of data call because of inactivity. This inactivity timer is activated once the minimum call duration is satisfied and no further activity is detected. For example, if the minimum call duration is set to 2 minutes and the inactivity timer is set to 15 minutes, the call will be connected for at least 15 minutes. To prevent a manual call from being disconnected because of inactivity, enter 0. The default is 15 minutes.

Changing Data Call Parameters 69

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 utilization on the first B channel which must be reached before the second B channel is allocated, or below which the first B channel must fall before the second B channel is removed. By default the threshold is 60%.

Connect Delay

This field defines the length of time the ISDN LAN Modem should wait before adding the second B channel. The default is 10 seconds. This default, in combination with the Connect/Disconnect Threshold default, means that after a B channel reaches over 60% throughput for ten seconds, a second B channel is added, if not in use by another call.

Disconnect Delay

This field defines the length of time the ISDN LAN Modem should wait before removing the second B channel. The default is 20 seconds. This default, in combination with the Connect/Disconnect Threshold default, means that if throughput falls below 60% for 20 seconds, a B channel is removed.

Configuring the Data

Call Parameters

To configure data call parameters, do the following.

From the ISDN LAN Modem main page, click Data Call Parameters.

Specify the minimum call duration.

Specify the inactivity period for an automatic data call.

Specify the inactivity period for a manual data call.

If you specified that you want to use the second B channel only when needed,

enter the percentage of bandwidth that must be reached on the first B channel before the second B channel is added or removed.

If you specified that you want to use the second B channel only when needed,

enter the length of time the ISDN LAN Modem should wait before adding the second B channel after the percentage in the Connect/Disconnect Threshold field is reached.

If you specified that you want to use the second B channel only when needed,

enter the length of time the ISDN LAN Modem should wait before removing the second B channel after it falls below the threshold defined in the Connect/Disconnect Threshold field.

Click

Submit

If you want to password protect the configuration profile of the ISDN LAN Modem, refer to “Locking and Unlocking the Configuration.”

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Changing Voice Call Routing

Understanding How

Calls Are Routed

This section describes how calls are routed to analog equipment attached to the ISDN LAN Modem’s voice ports and provides instructions for changing the way voice calls are routed.

By default, incoming voice calls to telephone number 1 are routed to Phone port 1, and incoming voice calls to telephone number 2 are routed to Phone port 2.

This default setting is illustrated in Figure 48. Voice calls to 732 555 1212 will only be routed to the telephone, while voice calls to 732 555 1211 will only be routed to the fax machine.

ISDN

1 PHONE 2

RESET

10-18 VDC

0.8 A MAX

732 555 1212

Figure 48

Default Voice Call Routing Configuration

732 555 1211

Changing Voice Call

Routing

To change the voice call routing setting, do the following.

From the ISDN LAN Modem’s home page, select Call Routing.

The Call Routing window appears.

Figure 49

Call Routing Window

Reserving DHCP Addresses 71

Specify which Phone port should handle calls associated with Telephone Number 1

by checking the appropriate phone port box. If your ISDN line has two telephone numbers, specify which phone port should

handle calls associated with Telephone Number 2.

Reserving DHCP Addresses

Click

Submit

If you want to password protect the configuration profile of the ISDN LAN Modem, refer to “Locking and Unlocking the Configuration.”

If you have workstations on your LAN with static IP addresses and other workstations on the same LAN with dynamic IP addresses, it is recommended that you reserve the static IP addresses in the DHCP server to ensure that they are not dynamically assigned to another workstation.

Reserve DHCP addresses as follows.

From the ISDN LAN Modem main page, click the The Workstation Selection window appears. From the Workstations drop-down list box, select the Workstation for which you

would like to reserve the IP address on the DHCP server. Check the box labeled Click

Submit

If you want to password protect the configuration profile of the ISDN LAN Modem, refer to “Locking and Unlocking the Configuration.”

Workstations

IP Address Statically Configured on Workstation

graphic

Selective Password Protection

You can set up partial password protection so that workstations may access only the manual calling page allowing them to place and receive calls. All other WebWizard pages remain inaccessible.

Note 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.

From the ISDN LAN Modem main page, click the

Check the box labeled

Click

Submit

All workstations are now able to access the Manual calling screen by clicking the Manual Calling button from the main configuration screen. For instructions about placing manual calls, refer to Chapter 8, “Placing, Receiving and Disconnecting Calls.”

Disable password protection for Manual Calling screen.

Password

button.

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Changing Your Password

Setting Up Your ISDN Line Manually

To change the password you defined as part of the initial setup to restrict access to the ISDN LAN Modem, do the following.

From the ISDN LAN Modem main page, click the

Enter your new password in the Password field.

Enter your new password in the Password (repeat) field to verify the new

Password

button.

password.

Click

Submit

Once a password is configured, an automatic protection feature is invoked if the WebWizard configuration program is open and there is inactivity for at least five minutes. After 5 minutes of inactivity, you are locked out of the Web Wizard configuration program. The password must be entered to gain access.

If you forget your password, you can reset the ISDN LAN Modem to the factory default which allows you to enter a new password. Note that when the ISDN LAN Modem is restored to the factory default settings, you will lose your configuration which includes all service provider profiles and ISDN parameters. For instructions, refer to Chapter 9, “Resetting the ISDN LAN Modem.”

This section describes how to set up your ISDN line manually. During initial setup, the SPID Wizard will already have configured these parameters for you unless you aborted the SPID Wizard. If you aborted the SPID Wizard, or if you have to change your ISDN parameter settings, do the following. Before you set up your ISDN line, you will need the following information about your ISDN line from your telephone company.

■

ISDN switch type

■

Telephone number(s) for your ISDN line

■

SPID for each telephone number

Indicate this information in the information sheet shown in Figure 50 for easy reference.

OfficeConnect ISDN LAN Modem

ISDN Information Sheet

ISDN Switch Type ____Lucent 5ESS NI1 ____Lucent 5ESS Custom

____Northern Telecom DMS 100 ____Siemens EWSD

Phone #1_____________________________ SPID# for Phone#1_____________________ Phone #2 ____________________________ SPID# for Phone #2____________________

Figure 50

ISDN Information Sheet

Locking and Unlocking the Configuration 73

To set up your ISDN connection, do the following.

From the ISDN LAN Modem main page, click ISDN Parameters.

The ISDN Parameters window appears.

Figure 51

From the ISDN Switch Type drop-down list box, select the ISDN Switch Type

ISDN Parameters Screen

required by your telephone company. In the Telephone Number 1 field, enter the first telephone number associated with

your ISDN line. In the Service Profile ID (SPID) 1 field, enter the SPID associated with Telephone

Number 1. In the Telephone Number 2 field, enter the second telephone number associated

with your ISDN line. If you do not have a second telephone number associated with your ISDN line, leave this field empty.

In the Service Profile ID (SPID) 2 field, enter the SPID associated with Telephone

Number 2.

Click

Submit

Note that supplementary voice services may also be configured from the ISDN Parameters page. For more information, refer to Chapter 7, “Supplementary Voice Call Services.”

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 Configuration

Once you have completed configuration of the ISDN LAN Modem, you can establish password protection over your ISDN LAN Modem’s configuration parameters.

To lock the configuration, do the following.

Click

Password

Under the Lock Configuration section, click the

from the ISDN LAN Modem’s main page.

Lock Configuration

button.

You may need to scroll down to see the Lock Configuration section. A message indicates that the configuration is locked.

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To unlock the configuration, do the following.

Continue

Click

. The Enter Password window appears. Enter your password to access the ISDN LAN Modem configuration program.

Submit

Click

. The ISDN LAN Modem main configuration page appears.

Configuring the ISDN LAN Modem from a Remote Location

Configuring the ISDN

LAN Modem Remotely

via Another LAN Modem

This section provides instructions for dialing into to your ISDN LAN Modem from a remote location using either another LAN Modem or an ISDN modem, in order to make configuration changes. In addition to another LAN Modem or ISDN modem, you will need a Web browser, and any PPP dialer software, such as Windows 98/95’s Dial-Up Networking, installed on your local computer.

To dial into a LAN Modem from a remote location using another LAN Modem, do the following:

Ensure that the two LAN Modems are on different networks.

For instance, one LAN Modem can be on the 192.168.1.x network, and the other one can be on the 192.168.2.x network.

Create a Private Network entry for the remote router.

No user name or password is needed. You must use an arbitrary numbered WAN link that is different from the two networks.

Run your web browser, and enter the IP address of the remote LAN Modem as the

URL. Once an ISDN connection is established, you can remotely manage your LAN

Modem.

Configuring the ISDN

LAN Modem Remotely

via an ISDN Modem

To dial into a LAN Modem from a remote location using an ISDN modem and Windows 98/95 Dial-Up Networking, do the following:

Click

and select Double-click

Start, Programs, Accessories

Dial-Up Networking

Make New Connection

, (Windows 98 users select

Communications

The Make New Connection window opens. Enter a name to designate this dial-up profile, such as

Select the ISDN modem attached to your local PC from the drop down list box and

click

LAN Modem

The Make New Connection phone number window will open. Enter the phone number of the remote ISDN LAN Modem to which you wish to

connect and click

Finish

Click

to complete the Make New Connection setup.

You will now have a new icon for the connection just created.

)

Configuring the ISDN LAN Modem from a Remote Location 75

Right click this new icon with your right mouse button and choose

Click the

Server Type

For Windows 95 users:

tab.

PPP, Windows 95, Windows NT 3.5, Internet

Properties

should be

chosen in the Type of Dial-Up Server list box. For Windows 98 users:

PPP, Internet, Windows NT Server, Windows 98,

chosen in the Type of Dial-Up Server list box. Under

Choose the TCP/IP check box for

for Click

Advanced Options

NetBEUI

and

IPX/SPX Compatible

TCP/IP Settings

, uncheck all boxes.

Allowed Network Protocols

. Uncheck the boxes

The TCP/IP Settings window opens. Click

Specify an IP address

192.168.2.1

if you are not sure.

Leave the other options for this window at their default settings, including the radio button for

Server assigned name server addresses

Click OK to close the TCP/IP Settings window. Click OK to close the Server Types window. Click OK to close your connection window. Double-click your new connection icon created via Dial-Up Networking.

and enter an IP address for your computer. Enter

should be

The Connect To window will open. You may choose to leave the Username and Password fields blank at this time.

Click

Connect

Your local computer will dial and establish a connection with your remote ISDN LAN Modem.

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

to cancel this

Stop

procedure. Enter the following address in your Web browser’s address bar:

http://192.168.1.1/

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.

Enter your password if required and then click

Submit

The ISDN LAN Modem main configuration page appears. You now have full access and can make any configuration changes as if you were connected via your local LAN. Note that you are limited to configuration of the LAN Modem when dialing in from a remote location. For instance, you cannot access the Web when during a remote dial in session.

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UPPLEMENTARY

ERVICES

OICE

ALL

Supplementary Voice Services

Before You Begin

The ISDN LAN Modem supports the following supplementary voice services.

■ Call Waiting

■ Caller ID

■ Call Conference (Three-Way Calling)

■ Call Transfer

■ Voice Mail (Message Service)

■ Caller ID Name Display

■ Call Forwarding

In order to use these services, they must also be supported on your ISDN line. Refer to Appendix E for ordering codes which support these features and then call your telephone company if you want to have these services added.

To use Call Conference, as well as Call Transfer, your ISDN line must support Flexible Calling. To use ISDN Call Waiting, your ISDN line must support Additional Call Offering (ACO). Additional line configuration may also be required for Caller ID Blocking, Call Forwarding and Voice Mail. Check with your telephone company to determine whether or not these services are supported. Note that there may be an extra charge to support these features.

Supplementary voice services are configured from the ISDN Parameters page. The default settings are shown in Figure 52.

Figure 52

Descriptions of each supplementary voice service follow.

Supplementary Voice Services

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Call Waiting

How to Configure Call

Waiting

Call Waiting allows you to place an active call on hold in order to answer another incoming call on the same telephone number. By default, Call Waiting is enabled on port 1 and disabled on port 2.

Telephone companies typically provide Call Waiting support on telephone number 1 only. For Call Waiting support on telephone number 2, you will have to have this capability added to your ISDN line. For more information refer to Appendix E.

To change the default setting, do the following.

Go to the ISDN LAN Modem’s main configuration page

http:// 3com.oc.lanmodem/

(

ISDN Parameters

Click Locate

Call Waiting Enable

, and then clear the check box for the port(s) for which you want Call Waiting disabled, or check the box for the port(s) for which you want Call Waiting enabled.

You should disable Call Waiting on a port(s) to which a fax machine is connected so that any fax calls are not interrupted.

Submit

Click

Call Waiting 79

How to Use Call Waiting

To use Call Waiting, do the following.

Table 1

How Do I Do This

Answer a call using Call Waiting?

Switch back to the first call? To put the second call on hold and switch back to the first call,

Toggle back and forth between the two calls?

End a call when I hear the Call Waiting tone (instead of putting the call on hold)?

Disconnect a call on hold? To disconnect a call on hold, make the call on hold active by

What if the active caller hangs up from the far end?

What if the caller on hold hangs up from the far end?

How to Use Call Waiting

When you hear the Call Waiting tone, press and release the switch hook button to put the first call on hold and connect to the second call.

If you do not answer the second call, the caller will hear a ring.

press and release the switch hook button. Press and release the switch hook button.

Hang up the phone and wait for it to ring. (The phone rings to indicate that there is an incoming call and the B-channel LED flashes.)

You are connected to the second call when you pick up. Or, if you already have a call on hold while on an active call and you want to end the active call before returning to the call on hold, hang up the phone and wait for it to ring back. Pick up the phone to reconnect to the call on hold.

pressing and releasing the switch hook button. Then, simply hang up the phone to drop the active call. If the other caller is still waiting on the line, the phone will ring.

If the active caller hangs up from the far end, the call on hold will remain on hold until you retrieve it by either pressing and releasing the switch hook button or by hanging up the phone and then answering it when it rings.

If the caller on hold on the far end hangs up, you will receive no notice. When you try to access that caller, either you will remain on the same call (if you do not have Flexible Calling) or you will get a dial tone (if you have Flexible Calling and it is enabled).

The ISDN LAN Modem can support a maximum of two simultaneous voice calls per phone port. If you already have two calls up (one active and one on hold) and a third call comes in, that caller hears the “user busy” tone unless you have Voice Mail, in which case the call is sent to your voice mail box.

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Caller ID

Caller ID Blocking

Caller ID

The ISDN LAN Modem supports Caller ID and Caller ID Blocking.

Caller ID is supported on the ISDN LAN Modem. If you subscribe to this service, the telephone number of the calling party is displayed on the caller ID device connected to the ISDN LAN Modem’s phone port that is called.

The name of the caller may or may not be displayed even if your caller ID device and service support this feature. Not all telephone companies display the Caller ID name on a residential ISDN line. Check with your telephone company.

When both B channels are in use, Caller ID is not available. One B channel must be available to provide the Caller ID information.

Caller ID Date and Time

The date and time displayed by your Caller ID unit is set according to the date and time on the workstation connected to the ISDN LAN Modem when the ISDN LAN Modem is powered on. If the date and time is incorrect, connect a workstation to the ISDN LAN Modem that has the correct date and time and then power cycle the ISDN LAN Modem. Once it is powered up, launch your Web browser and go to the ISDN LAN Modem’s main page at

http://3com.oc.lanmodem/

To allow or prevent your telephone number from being displayed on a remote Caller ID device, do the following. By default your telephone number is displayed.

Not all telephone companies support Caller ID Blocking. Check with your telephone company. If Caller ID Blocking is not provided on your ISDN line, then you cannot use this feature.

Go to the ISDN LAN Modem’s main page (

ISDN Parameters

Click

Next to

Outgoing Caller ID Block

, select the port number box(es) for which you

http:/ /3com.oc.lanmodem/

would like Caller ID Blocking enabled. Clear the port number box(es) for which you would like Caller ID Blocking disabled.

For instance, if you check the box labeled Port 1, calls made from the telephone connected to that port will not display the telephone number to the user at the far end.

Submit

Click

Flexible Calling 81

Flexible Calling

Configuring FCO on the

ISDN LAN Modem

Flexible Calling (also known as Flexible Call Offering (FCO)) is an additional service added to your ISDN line to allow you to use voice features such as Call Conference (Three Way Calling), Hold, Drop, Transfer and Message Service on telephones connected to the ISDN LAN Modem’s phone ports. If you are not sure whether your ISDN line supports Flexible Calling, check with your telephone company.

In some cases your telephone company may enable Flexible Calling on your first telephone number only. You may need to specifically request that these services be enabled on your second telephone number as well.

Once Flexible Calling is provided on your ISDN line, you can either enable or disable Flexible Calling (that is, all of the associated voice features) on the ISDN LAN Modem on a telephone number basis.

By default, Flexible Calling is enabled on telephone number 1 and disabled on telephone number 2. If your ISDN line supports Flexible Calling only on the first telephone number, you should leave this default setting as is. If your ISDN line supports Flexible Calling on both telephone numbers, you may want to enable Flexible Calling on telephone number 2 so that you can use Call Conference and Call Transfer from telephones connected to either ISDN LAN Modem phone port.

To enable or disable Flexible Calling, do the following.

Go to the ISDN LAN Modem’s main configuration page

(

http://3com.oc.lanmodem/

Flexible Calling Codes

Click

Next to

ISDN Parameters

Flexible Calling Enable

, select the telephone number check box(es) for which you would like Flexible Calling enabled. Or, clear the telephone number check box(es) for which you would like Flexible Calling disabled.

Click

Submit

Each Flexible Calling feature (that is, Conference, Transfer, Drop and Message Service) has a code associated with it that allows that particular feature to be enabled or disabled. By default these features are all enabled. The value displayed is the code required for this service to work between the ISDN LAN Modem and your telephone company. It is recommended that you leave the defaults set to the standard, national values.

To change these values, do the following.

Go to the ISDN LAN Modem’s main configuration page

(

http://3com.oc.lanmodem/

Click

ISDN Parameters

To disable a feature, next to

, enter 0 in the box to the right of the feature

Codes

you want to disable. To change the values, enter the appropriate value (provided by your ISDN service provider) in the appropriate box.

Click

Submit

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Call Conference (Three-Way Calling)

Call Conference (also referred to as Three-Way Calling or TWC) allows you to add another party to an existing call. This feature can be used whether you have received or have placed the first call.

You cannot conference two incoming calls. You must initiate the second call in order to activate Call Conference.

Table 2

How Do I Do This

Place a new conference call? While the first call is active, press and release the switch hook

Drop the last party added to the conference call?

Abort the second call and switch back to the first call?

What if I hear a dial tone when I attempt to conference all three parties?

What if the telephone rings after I hang up?

How to Use Call Conference

button. The B channel LED light flashes to indicate that the first call is on hold, and you will hear a dial tone. Then dial a third party number.

After the third party has answered, press and release the switch hook button to connect all three parties.

To drop the last party added to the conference call, press and release the switch hook button.

If the dialed party is busy, press and release the switch hook button to cancel the call and reconnect to the first call.

If you dialed a wrong number, or the far end does not answer, hang up the phone to abort the attempted call. The phone will then ring, indicating that the first call is on hold. Answer the phone to reconnect to the first call.

A dial tone indicates that one of the parties has dropped their call. Press and release the switch hook button to return to the previously active call. You can then conference a third party as described previously.

While you try to conference a call, the active call will be put on hold to allow you to dial a new call. If you hang up the phone before the call is connected, the telephone will ring to let you know that you still have a call on hold.

Call Transfer

Call Transfer is a voice call feature that allows you to transfer a call to a third party. This feature can be used whether you have received or have placed the first call.

Table 3

How Do I Do This

Place a new call? While the first call is active, press and release the switch hook

Cancel the second call and switch back to the first call?

How to Use Call Transfer

button, wait for the dial tone, and then dial a third party number.

After the third party has answered, press and release the switch hook button to conference all three parties, and then hang up the telephone to transfer the call.

If the dialed party is busy, press and release the switch hook button to cancel the attempted call and reconnect to the first call. If you hang up, the phone will ring back, indicating that you have a call on hold.

Message Service/Voice Mail 83

Message Service/Voice Mail

If you subscribe to Voice Mail on your ISDN line, then you have Message Service which tells you that you have new messages in your voice mail box. By default, Message Service is disabled. You must enable this feature on the ISDN LAN Modem to use it.

The Alert LED on the front of the ISDN LAN Modem flashes when there are new messages in your voice mail box. Note that the Alert LED also flashes during firmware download. The flash sequence distinguishes the difference— faster during firmware download and slower for message indication.

You are also notified when you lift the receiver and hear a stutter tone (that is, multiple short tones in quick succession). Note that this tone may be provided by either your telephone company or the ISDN LAN Modem.

To change the default setting, do the following.

Go to the ISDN LAN Modem’s main configuration page

(

http://3com.oc.lanmodem/

Click

ISDN Parameters

Locate number(s) for which you want Message Service enabled, or clear the boxes for the telephone number(s) for which you want Message Service disabled.

Click

Message Service Enable

Submit

, and then select the check box for the telephone

Call Forwarding

If you do not subscribe to Voice Mail, make sure that the Message Service Enabled feature is disabled. If it is enabled and you do not have Voice Mail on your ISDN line, then callers always hear a ringing signal whenever that number is dialed whether or not you are on the line.

Call Forwarding is a voice service provided by your telephone company that lets you forward your incoming calls to another telephone number. To use this feature, enter the appropriate touch-tone key(s) (as described by your telephone company) from the telephone attached to your ISDN LAN Modem. These tones are passed through the ISDN LAN Modem.

When a call is placed to a phone connected to the ISDN LAN Modem, the forwarded call is announced by a short ring on the telephone from which the Call Forwarding tones were entered. Note that you cannot answer the call. The ring is a reminder that Call Forwarding is still in effect.

To use Call Forwarding successfully, it is recommended that you configure each phone port to be associated with only one ISDN telephone number. For instance, associate telephone number 1 with port 1 exclusively and telephone number 2 with port two exclusively. You can make this change by clicking the ISDN LAN Modem main page and then checking/clearing the appropriate boxes. If you have more than one telephone number routed to a single port, this can cause confusion regarding which telephone number has been forwarded. Note that this also applies if you have Voice Mail.

Call Routing

from

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Placing Calls

Placing a Call Automatically

ISCONNECTING

This chapter covers the following main topics:

■ Placing calls automatically and manually

■ Receiving calls

■ Disconnecting data calls

You can place calls from your computer through the ISDN LAN Modem to a remote location either automatically by using one of the service provider connections you set up or manually by entering the telephone number of the destination.

3Com assumes no liability for phone charges or other expenses incurred in connection with the use of this product.

To place a call using one of the service provider connections you set up, simply launch the application. For example, if an ISP was configured, simply launch your Web browser on your computer to connect to the default location configured in your Web browser.

ALLS

Telephone Number Selection for Data Calls

When you place a data call, the ISDN LAN Modem tries to use the second telephone 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 ISDN LAN Modem automatically calls the first configured service provider. If you configure a second remote connection, such as an additional ISP, and want to use that second profile for an automatic data call, do the following.

Access the ISDN LAN Modem’s configuration main page.

Choose the Workstation graphic.

Select your computer.

Associate only the Service Provider that you want to use.

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Placing a Call Manually

to an Existing Service

Provider

You can also manually place a call to an existing service provider or to a destination that has not been previously defined as long as the remote location provides an IP address dynamically during call setup.

To place a call manually to a service provider that is already configured, do the following.

The existing service provider must be associated with your workstation in order for you to place a manual call to it. By default all service providers are associated with all workstations. If you are unsure, click Workstations from the main page and then select your workstation. Make sure the service provider you want to call is associated with your workstation.

From the ISDN LAN Modem home page, click the

Manual Calling

button. The Manual Call Control window appears. In the table, locate the name of the service provider to which you want to connect

and then verify that the call is not already connected to that destination by looking under the

Click

Status of Call

Place Call

column.

A message indicates that the call is being placed. A B channel LED on the ISDN LAN Modem front panel illuminates green when a connection is established. Once connected you are ready to run any desired application appropriate for that location, such as FTP to transfer files, or you may enter a different URL in your Web browser to access the Internet.

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.

From the ISDN LAN Modem’s home page, click

Manual Calling

. The Manual Call Control window appears. In the table, locate

Place Call

Click

Enter the telephone number of the destination in the Telephone Number field.

Enter your User ID for the remote destination.

Enter your Password for the remote destination.

Enter the DNS address if the remote destination does not automatically provide an

TempSvcProvider

IP address. Otherwise, leave this field empty. Specify how you would like the bandwidth allocated for this connection.

You can choose always to use just one B channel for this connection, always to use two B channels for this connection (that is, always use Multilink PPP), or you can specify that you only want the second B channel added when the first B channel reaches the threshold. The threshold default is 60%. To change the threshold default, refer to “Changing Data Call Parameters” in Chapter 5.

Receiving Calls 87

Participating in a

Temporary Call

Specify the B channel rate or select

To ll M iz er

Leave the B channel rate set to 64 Kbps unless your telephone company and the locations you will be connecting to only support 56 Kbps.

TollMizer sends a data call over a voice circuit allowing you to save the typical cost difference between a voice and data call. Note that the destination you are calling must also support this feature (also referred to as Switched 56 Permissive or Data Over Voice). Check with your telephone company to ensure that they support Data Over Voice.

Click

Make Call

A message indicates that the call is being placed. A B channel LED on the ISDN LAN Modem front panel illuminates green when a connection is established. Once connected, you are ready to run any desired application appropriate for that location, such as ftp to transfer files, or you may enter a different URL in your Web browser to access the Internet.

Once a temporary call is established, other workstations may also connect to this service provider by clicking connected to

Te m p S v cP r o v i d er

Te mp S vc P ro vi de r

. Note that if multiple parties are

, the call is disconnected as soon as one party hangs

up.

Unlike calls to configured service providers, temporary call connections cannot be shared by other users automatically. For instance, if one workstation is connected to an ISP that is configured as one of the four service providers and you want to use the same ISP, you simply launch your Web browser. However, if a temporary call has been placed, in order for another workstation to use that connection, that other workstation user must go to the Manual Calling page and then click

Participate in existing call to (telephone number)

Placing Multilink PPP

Receiving Calls

Receiving Data Calls

Calls

Before you place a call, ensure that either the

B Channel

check box on the ISDN LAN Modem’s Service Provider Parameters

Use Two B Channels

Add Second

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 PPP call.

If you place a Multilink PPP call and the remote location you are calling does not support Multilink PPP, a single B channel call will be established.

This sections describes how the ISDN LAN Modem receives data calls and voice calls and how distinctive ringing may be used to differentiate voice calls.

The ISDN LAN Modem can receive incoming data calls for the following purposes:

■ Making changes to the previously defined connection types

Refer to Chapter 6, “Configuring the ISDN LAN Modem from a Remote

Location,” for instructions.

■ Downloading the latest firmware

Refer to Chapter 9, “Downloading Firmware to Your ISDN LAN Modem,” for instructions.

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■

Reviewing ISDN LAN Modem statistics Refer to Chapter 9, “Reviewing Statistics,” for instructions.

Incoming calls for data transfer are not supported. For example, you cannot call into the ISDN LAN Modem to use a computer as a server that others would dial into and use for downloading information.

Receiving Voice Calls

Distinctive Ringing

Voice calls received by the ISDN LAN Modem will be routed to the analog equipment connected to the voice ports. By default, incoming voice calls to telephone number one are routed to Phone port one, and incoming voice calls to telephone number two are routed to Phone port two.

To change the default routing, refer to “Changing Voice Call Routing” in Chapter

Specialized telephone equipment such as some speakerphones, answering machines, and fax machines that require more than 42 VAC ringing voltage may not detect incoming calls.

You can configure the ISDN LAN Modem to distinguish between telephone rings for calls to telephones connected to the ISDN LAN Modem’s phone ports. When this feature is enabled, the ringing pattern for calls to telephone number one changes to distinguish between calls to telephone number one and calls to telephone number two.

By default this feature is disabled. To enable, do the following.

Go to the ISDN LAN Modem’s main configuration page:

http://3com.oc.lanmodem/

ISDN Parameters

Click

Disconnecting Data Calls

Manually

Locate Click

Distinctive Ringing

Submit

and then click the box labeled

Enable

You can disconnect data calls manually or use timers to disconnect calls automatically.

To disconnect calls manually, do the following:

From the ISDN LAN Modem home page, click

are using the custom browser, click

Dial/Hang Up

Manual Calling

. Alternatively, if you

from the Links menu bar. The Manual Call Control window appears. In the table, locate the name of the service provider from which you wish to

disconnect and then verify that the call is up under the

Hangup Call

Click

Status of Call

column.

A message indicates that the call is being disconnected.

Disconnecting Data Calls 89

Disconnecting Calls

Automatically Using

Timers

Bandwidth on Demand

Parameters

There are a number of ways by which you can configure calls to be disconnected automatically. You can set timers and disconnect thresholds from the Data Call Parameters window. Specifically, the parameters you can set are as follows.

Minimum Call Duration

Enter the minimum length of a call that is measured before the ISDN LAN Modem detects inactivity on the connection and then starts an inactivity timer. The default is 2 minutes.

Idle Timeout

In the field

Disconnect a data call after how long of an inactivity period?

, enter the number of seconds after which a call should be disconnected because of inactivity. Once the minimum call duration is satisfied and then no activity is detected for a call, this timer is started. To prevent a data call from being disconnected because of inactivity, enter 0. The default for an automatic call is 30 seconds. The default for a manual call is 15 minutes.

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 channel is allocated. By default the threshold is 60%.

Connect Delay

This field defines the length of time the ISDN LAN Modem should wait before adding the second B channel. By default the length of time is 10 seconds. Therefore, this default, in combination with the Connect/Disconnect Threshold default means that after a B channel reaches over 60% throughput for 10 seconds, a second B channel is added, if not already in use.

Disconnect Delay

This field defines the length of time the ISDN LAN Modem should wait before removing the second B channel. By default the length of time is 20 seconds. Therefore, this default, in combination with the Connect/Disconnect Threshold default means that if throughput falls below 60% for 20 seconds, a B channel is removed.

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ROUBLESHOOTING AND

AINTENANCE

This chapter explains how to isolate and solve problems encountered with the ISDN LAN Modem. Problems may stem from incorrect option settings or improper installation.

This chapter covers the following main topics.

■ Checking the basics

■ Monitoring the LEDs

■ Evaluating symptoms and solutions

■ Finding more information

■ Contacting technical support

■ Downloading firmware

■ Resetting the ISDN LAN Modem

■ Reviewing statistics

Checking the Basics

CAUTION: There are no user-serviceable parts inside your ISDN LAN Modem. Unauthorized opening of the unit will void the warranty.

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 10BASE-T Ethernet cable (8-pin to 8-pin)

■ Verify that the power cord is connected to the ISDN LAN Modem and an

electrical outlet.

■ Verify that the ISDN cable is properly connected to the ISDN LAN Modem

and the ISDN wall outlet.

The ISDN LAN Modem will not operate if connected to an analog telephone wall jack. Make sure that the ISDN LAN Modem is connected directly into the ISDN wall outlet without connection to any intermediate telephone equipment (an NT1 device is not required with the ISDN LAN Modem).

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Monitoring LEDs

Monitoring the ALERT

Monitoring the ISDN

LED

If you are experiencing operational inconsistencies, monitor the ALERT, ISDN, B channel and LAN port status LEDs to isolate problems. Refer to Table 5 for instructions to resolve the problem.

Press and release the

Reset

button and observe the ALERT LED. During power-up

self-test, the ALERT LED will remain lit.

■

If the ALERT LED goes out, the test has been successful.

■

If the ALERT LED flashes for more than several seconds, this indicates one of the following:

Voice Mail messages pending (if you subscribe to Voice Mail)

■

ISDN LAN Modem is in firmware download mode

■

The DHCP server is full and cannot assign any more IP addresses

■

There is an internal failure (the ISDN LAN Modem also resets itself)

■

Voice Mail message indication uses a slower flash than firmware download and internal failure indication. If the ISDN LAN Modem is neither in firmware download mode nor do you have voice mail messages, notify your reseller that the ISDN LAN Modem has failed the self-test and order a replacement.

Place a call and then observe the ISDN LED. One of the following three conditions may occur:

Monitoring the

B Channel LEDs

Monitoring the LAN Port

Status LEDs

If the ISDN flashes and then remains lit, your ISDN line is functioning properly.

If the ISDN LED never turns on, check the ISDN cable. Ensure that it is connected securely to the wall outlet and the ISDN LAN Modem’s ISDN port. If the ISDN LED still is not lit, there may be a problem with your ISDN line.

If the ISDN LED flashes but does not remain lit, first make sure that your ISDN telephone numbers and SPIDs 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.

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 call during the call establishment phase and then blinks faster during the PPP establishment phase. They then remain solid amber or green once the connection is established. If they do not remain solid amber or green, refer to the “Troubleshooting Problems Indicated by LEDs” section.

Observe the LAN port status LED labeled 1, 2, 3, or 4 depending on the port number to which your computer is connected. If the LED(s) is lit, the ISDN LAN Modem detects the Ethernet link signal and operation is normal. When the computer attached to that port is transmitting data to the LAN, this LED flashes.

If the port status LED is Off, the ISDN LAN Modem does not detect the Ethernet link integrity signal. Refer to the “Troubleshooting Problems Indicated by LEDs” section. First ensure that the workstation is powered on. If so, then the Ethernet cable may not be properly connected, or it may be the wrong polarity.

Monitoring LEDs 93

Troubleshooting

Problems Indicated by

Table Table 5 lists the states of ISDN LAN Modem LEDs which indicate errors and also provides possible causes and solutions.

LEDs

Table 5

LED LED State Possible Cause Solution

ALERT LED

Troubleshooting Problems Indicated by LEDs

ALERT LED remains lit.

ALERT LED continues to flash.

Upon power up, both the ALERT and ISDN LEDs flash.

ALERT, ISDN OK, B1, and B2 LEDs alternately flash.

An internal failure. Notify your reseller or technical support that the ISDN

Self test failure or ISDN LAN Modem is in firmware download mode.

ISDN LAN Modem has received new voice mail messages.

DHCP server is full and cannot assign any more IP addresses

A previous firmware download was not completed successfully.

Firmware download process was aborted.

LAN Modem has failed the self-test. Power cycle the ISDN LAN Modem. If the ALERT LED

continues to flash, the ISDN LAN Modem has failed the self test. Contact your network supplier. If the ALERT LED is not flashing, then the ISDN LAN Modem is now operating correctly.

Lift the telephone handset and listen for the stutter tone that indicates new messages are waiting for you.

Release the last IP address assigned by pressing **3265# from a telephone connected to a LAN Modem phone port

Download the firmware. Refer to

http://www.remoteaccess.3com.com/support/ docs/lanmodem/welcome.html

download instructions.

Do not remove power plug.

flashing (about 1 minute) to allow the ISDN LAN modem to cancel the firmware download. Once the LEDs stop flashing, you may restart firmware download.

for firmware

Wait until the LEDs stop

B1/B2

ISDN LED

LAN STATUS

B channel LED(s) do not remain green or amber.

ISDN LED does not light.

ISDN LED continues to flash for more than a few minutes

LAN port status LED is off (that is, not illuminated).

Problem with your computer or application software or incompatible local or toll telephone company.

Poor physical connection to the local telephone equipment.

A mismatch between the settings of the ISDN line and the ISDN LAN Modem configuration.

Ethernet cable is not securely connected.

Ethernet card is not set up properly.

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 able to place a voice call but not a data call, then there may be an incompatible local or toll telephone company. Contact your local telephone company and have it verify that you can dial a data call to the destination telephone number.

Check the cables to ensure that they are securely connected to the appropriate ports.

If the telephone wires at your site appear to be satisfactory, call your local telephone company for assistance.

Check the ISDN statistics screen to determine whether the SPIDs are properly configured. If not, go to the ISDN Parameters screen to enter the correct SPIDs.

Call the telephone company and have it verify that your line is configured for circuit-switched voice and data service.

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 ISDN LAN Modem and in the Ethernet port on the back of your computer. Also, your computer should be turned on and your network software should be running.

Make sure your Ethernet card is set up properly (proper drivers are loaded). Refer to the documentation provided with your Ethernet card for instructions.

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Evaluating Symptoms and Solutions

Table 6

Symptom Possible Cause Solution

Upon initial setup, communication between the ISDN LAN Modem and my computer cannot be established.

(continued)

Symptoms, Causes, and Solutions

Table 6 lists symptoms of common problems, possible causes, and possible solutions.

Incompatible IP address on your computer.

Your Web browser needs the IP address of the ISDN LAN Modem.

There is a configuration problem. Reset the ISDN LAN Modem to the factory default

The wrong cable may be connected to the LAN port on the ISDN LAN Modem and your PC.

Web browser may not be set to a default start page.

Reset the IP address on your computer. For Windows 98 and 95 users, run Winipcfg.exe.

Select the Ethernet adapter connected to the ISDN LAN Modem. Click Release All and then click Renew All.

For Windows NT 4.0 and Windows 3.11 users, run ipconfig /release and ipconfig /renew.

For Mac users, from the Apple menu, select Control Panels and then select TCP/IP. Make sure Ethernet is selected in the Connect via field. From the Configure field, select Using BootP Server to clear the fields, then close and save changes to the Control Panel. Open the TCP/IP control panel and select Using DHCP Server. The fields should now read <will be supplied by server>. Select File and then Close and save changes when prompted.

Enter the following URL in your Web browser:

http://192.168.1.1/mainpage or http://3com.oc.lanmodem/

setting. Disconnect 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.

Make sure you are using the 8-pin to 8-pin cable labeled Ethernet that was provided with your ISDN LAN Modem. If you are using another 10BASE-T Ethernet (Category 5) cable, it must be a straight-through cable.

Enter a default URL from within your Web browser. If you are using Internet Explorer, launch your Web

browser. From the View menu select Options. From Page, select Start Page and then enter an address in the 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.

Your Web browser may be configured to use a proxy server, instead of the LAN Modem. Internet Explorer users: Launch your Web browser. From the View menu, select Internet Options, and then the Connection tab. Under the Proxy Server header, uncheck the box labeled Accessing the Internet using a proxy server. Netscape users: Launch your web browser. From the Edit menu, select Preferences. Double-click Advanced, and then click Proxies. Check the box labeled Direct

Connection to the Internet.

Evaluating Symptoms and Solutions 95

Table 6

Symptom Possible Cause Solution

The LAN Modem seems to be placing calls inadvertently.

Although multiple service providers are configured, all calls are going to the same service provider which is a private network.

Clicking Submit in the LAN Modem’s configuration pages does not take you to the next screen.

The Windows 95 “Connect To” window opens upon launching a Web browser.

Calls cannot be placed from analog equipment

When the handset of a telephone attached to the ISDN LAN Modem is lifted, a dial tone cannot be heard.

(continued)

Symptoms, Causes, and Solutions

ISDN LAN Modem has assigned all available IP addresses.

NetBIOS is making DNS requests causing the LAN Modem to initiate a call.

You may not have configured the IP address and the subnet mask in the Private Network Parameters window.

JavaScript may not be enabled in your Web browser.

Networking is setup for use with a serial port modem.

If you cannot place calls, there may be a problem with the configuration of your ISDN line.

Calls from the analog port may be blocked.

There may be two active calls to different locations thus using both B channels and leaving no bandwidth for the voice call.

Bandwidth allocation for this service provider may be set to Always use 2 B channels and a call is currently up.

The ISDN line cable, power cable and/or phone cable may not be firmly connected.

If you cannot place calls, there may be a problem with the configuration of your ISDN line.

From another computer attached to the ISDN LAN Modem, go to the LAN Modem’s main configuration page. Click Workstations. Select the name of computer you removed and then click Select. Click Release Workstation Entry. Reboot the workstation. The newlyadded workstation can now be assigned an IP address.

If you cannot release a workstation entry, connect a telephone to one of the ISDN LAN Modem’s phone ports and press **3265# from the keypad to release the last IP address assigned by the LAN Modem.

Enable NetBIOS filtering. From the ISDN LAN Modem’s home page, click LAN Parameters. Check the box labeled Enable NetBIOS filtering.

From the ISDN LAN Modem’s home page, click Service Providers and then select the private network profile you already configured. Enter the IP address and the subnet mask for the private network.

Enable JavaScript via your Web browser’s configuration options.

To bypass the “Connect To” window:

1 Double-click the Internet icon in the control panel. 2 Clear the check box labeled “Connect to the

Internet as needed.” 3 Click OK. This allows all outgoing connections to run directly

through your ISDN LAN Modem. Call the telephone company and have them verify your

telephone number(s) and SPID(s) and that your line is configured for circuit-switched voice and data service.

From the Call Routing window, check the Phone Port 1 and Phone Port 2 boxes which are used for voice call routing. Make sure that the correct Phone Port box for that port is checked.

If there are two independent data calls connected, go to Manual calling to disconnect one of the active calls.

Either go to Manual calling and disconnect the current call or go to service providers and change bandwidth allocation to either Add second B channel as required or Use one B channel.

Check all cables and connectors to ensure that they are inserted securely.

Call the telephone company and have them verify your telephone number(s) and SPID(s) and that your line is configured for circuit-switched voice and data service.

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Table 6

Symptoms, Causes, and Solutions

Symptom Possible Cause Solution

Calls from the analog port may be blocked.

From the Call Routing window, check the Phone Port 1 and Phone Port 2 boxes which are used for voice call routing. Make sure that the correct Phone Port box for that port is checked.

A computer on the LAN was replaced with another one and now the newly added computer cannot communicate with the ISDN LAN Modem.

The ISDN LAN Modem has not released the IP address for the previous computer and therefore will not assign a new one because it allows a maximum of

25.

If you cannot release a workstation entry, connect a telephone to one of the ISDN LAN Modem’s phone ports and press **3265# from the keypad to release the last IP address assigned by the LAN Modem.

Some application software doesn’t work properly.

Application may have an embedded IP address which causes a problem when NAT is

If you have a static network, disable NAT and try using the application again. Do not disable NAT if your

network is dynamic. enabled on the ISDN LAN Modem.

The user name and/or password for this service provider may not

Make sure that the user name and password for this

service provider are entered accurately. be entered properly.

A connection has been established (B1 or B2 green LED remains lit) but data

There is an interoperability mismatch between the local and remote applications.

Make sure that the local and remote data applications

have communications capability and are properly

configured.

cannot be sent. Calls continue to reconnect or

calls do not timeout and disconnect.

An application or LAN device is sending IP packets.

Go to Current or Last Call Statistics and check Reason

for call coming up.

Or, set the workgroup on each PC to workgroup.

Check applications to see if any are running in the

background.

Or, turn off Microsoft’s print/file sharing or use NetBEUI

for local service (that is, within the LAN). To turn off

print/file sharing, from Control Panel select Network

and then the Configuration tab. Click the File and Print

Sharing button. Clear both check boxes and then click

OK.

Make sure that the timeout value is not set to zero.

Check the timeouts configured for the ISDN LAN

Modem as explained in “Changing Data Call

Parameters” in Chapter 6.

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.

A Multilink PPP call cannot be placed. Only one B channel connects.

Multilink PPP may not be configured properly.

There may not be enough traffic to reach the threshold for adding the second B channel.

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

Chapter 6 for the threshold value and instructions on

how to change this value, if desired.

(continued)

Evaluating Symptoms and Solutions 97

Table 6

Symptom Possible Cause Solution

A Multilink PPP call was established but did not remain connected.

Although only one data call is connected, another voice or data call cannot be placed.

Caller ID date and time are not accurate.

Cannot place a call over the LAN Modem's phone port using a Sportster PC Card modem.

Cannot place or receive two simultaneous voice calls.

After placing a Multilink PPP call, you lift the handset of a telephone to place a call and do not hear a dial tone.

Not receiving message indication for Voice Mail or any voice mail messages.

Cannot hear dial tone when attempting to place a call using an ISDN LAN Modem phone port.

(continued)

Symptoms, Causes, and Solutions

May be an incompatibility with the router into which you are dialing. Some remote routers split the two B channels of a Multilink PPP call between different routing devices, preventing the channels from being linked.

When the LAN Modem is configured to Use 2 B channels and the remote end disconnects one of the 2 B channels, the LAN Modem will disconnect the now single B channel call since it’s configured to use 2 B channels.

A voice or data call may already be connected leaving only one B channel available.

The connected call may be configured to always use two B channels, leaving no bandwidth available for another call.

Modem mistakes analog phone line for digital line.

Your ISDN line may not support simultaneous voice and data on both B channels.

The handset was lifted to place a call while the ISDN LAN Modem was negotiating the Multilink PPP call. Negotiation must be complete before a call can be placed.

Message Service box is not checked.

Bandwidth Allocation may be set to Use two B Channels.

Try reconnecting your call during off peak hours. If you are still unable to establish a Multilink PPP call, contact your ISP to confirm that they support this feature.

From the ISDN LAN Modem’s home page, click Service Providers and then select the provider you were connecting to using Multilink PPP. For Bandwidth Allocation, select Add second B channel as required.

Place the Multilink PPP call when both B channels are available.

Check the bandwidth allocation setting for that service provider. Refer to “Editing Service Provider Profiles” in Chapter 6 for details.

Connect a workstation that has the correct time to the ISDN LAN Modem and then turn the LAN Modem power off and then on again. Once it is powered up, launch your web browser and go to the LAN Modem's main page at http://3Com.oc.lanmodem/

Add the following command to the Sportster modem init string: AT ~~L0.

Check with your ISDN line provider to determine whether or not your ISDN line supports simultaneous voice and data on both B channels.

For a Lucent 5ESS switch, your ISDN line must have Max B Channel Limit=2 for simultaneous voice and data.

For a Siemens switch, your ISDN line must have

Number of B Channels Per Call Type Per Office Equipment Directory Number (NBCCTOEDN) =2.

Hang up the handset, wait a few seconds, and then try again.

From the ISDN LAN Modem’s main configuration page, click ISDN Parameters. Under Supplementary Services, check the box labeled Message Service.

Go to the appropriate Service Providers page and change the Bandwidth Allocations setting to Add second B channel as required.

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Table 6

Symptoms, Causes, and Solutions

Symptom Possible Cause Solution

Attempted to place a voice call over a directory number that is already in use for a data call. If this is the case, your ISDN line is configured to allow only one B channel per directory number.

Contact you telephone company if you want to have

simultaneous voice and data on both B channels.

For a Lucent 5ESS switch, your ISDN line must have Max B Channel Limit=2 for simultaneous voice and data.

For a Siemens switch, your ISDN line must have

Number of B Channels Per Call Type Per Office Equipment Directory Number (NBCCTOEDN) =2.

Cannot receive an incoming call.

Bandwidth Allocation may be set to Use two B Channels.

Two separate data calls are up. Your ISDN line does not support simultaneous voice and data on both B channels.

Contact you telephone company if you want to have

simultaneous voice and data on both B channels.

For a Lucent 5ESS switch, your ISDN line must have Max B Channel Limit=2 for simultaneous voice and data.

For a Siemens switch, your ISDN line must have

Number of B Channels Per Call Type Per Office Equipment Directory Number (NBCCTOEDN) =2.

Your ISDN line does not have

Contact you telephone company to have ACO added. ACO.

The analog modem connected to the ISDN LAN Modem is unable to detect dial tone when attempting to place an analog call while a Multilink PPP call is established.

The standard period of time most modems are set to wait for a dial tone before hanging up the call is 2 seconds, which is about the same amount of time it takes the ISDN Modem to drop the second

Adjust the analog modem setting as follows: Change

S-Register 6 (Wait Time for Blind Dialing) on the analog

modem to a value of 3 or higher (the default is usually

2) to increase the period of time your analog modem is

set to wait before hanging up the call.

B channel from a Multilink PPP call and re-establish a dial tone.

Cannot conference, transfer, or drop voice calls.

Flexible calling is not enabled. From the ISDN LAN Modem’s main configuration page,

click ISDN Parameters. Under Flexible Calling Enabled,

check the telephone number check box for which you

want Flexible Calling enabled.

If Flexible Calling is enabled on the ISDN LAN Modem,

check with your telephone company to make sure it is

enabled on your ISDN line. Your telephone company uses

older codes for these services.

From the ISDN LAN Modem’s main configuration page,

click ISDN Parameters. Under Supplementary Services,

enter the following in the Codes field: 6 for

Conference, 7 for Transfer, 8 for Drop and 9 for

Message Service.

Caller always hears a ringing signal even when line is busy.

Message service is enabled on the ISDN LAN modem but you do not subscribe to voice mail from the

From the ISDN LAN Modem’s main configuration page,

click ISDN Parameters. Under Message Service Enable,

make sure both boxes are clear. telephone company.

(continued)

Evaluating Symptoms and Solutions 99

Table 6

Symptom Possible Cause Solution

Sending e-mail is occasionally slow when more than one workstation is sending e-mail to the same SMTP server.

Compression does not work Compression is not configured. Go to the appropriate Service Provides page and ensure

Symptoms, Causes, and Solutions

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 response to. Therefore, the request is discarded.

After 30 seconds, the SMTP server responds, this time using the port number specified by the workstation allowing the e-mail to be sent.

Compression negotiation was not successful.

Co-ordinate the sending of your e-mail with the other workstations, or have each workstation use a different SMTP mail server.

compression is enabled. Although compression is enabled on the LAN Modem,

the device the LAN Modem is dialing into must also have compression enabled and also support the same type of compression (hi/fn LZS) otherwise compression negotiation will not be successful.

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Finding More Information

Contacting Technical Support

Downloading Firmware to Your ISDN LAN Modem

Resetting the ISDN LAN Modem

For more information about the ISDN LAN Modem, such as frequently asked questions and specific technical notes go to the following URL:

http://www.remoteaccess.3com.com/support/docs/lanmodem/welcome.html

and then bookmark this site for quick and easy access. If you are using the ISDN LAN Modem custom browser, click

Updates

from the menu bar.

For technical support, refer to the technical support card that was included with your ISDN LAN Modem for the telephone number for your location.

Your ISDN LAN Modem has been designed to be user-upgradable. Firmware upgrades and instructions will be available at

http://www.remoteaccess.3com.com/support/docs/lanmodem/welcome.html

There are two types of resets you can perform, a normal reset and a factory reset.

■

A normal reset resets the ISDN LAN Modem without affecting any of the configuration that has 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.

Resetting the ISDN

Modem Using a

Telephone

■

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.

From the ISDN LAN Modem’s home page, select

Select the type of reset you would like to perform, normal or factory.

Maintenance

If your computer cannot communicate with the ISDN LAN Modem and therefore you cannot get to the ISDN LAN Modem’s home page, you can restore the ISDN LAN Modem to the factory defaults using a telephone connected to one of the phone ports.

Once you’ve connected an analog telephone to one of the ISDN LAN Modem’s phone ports, do the following.

Disconnect the ISDN cable from the ISDN LAN Modem.

Lift the handset of the telephone.

You may hear a fast busy tone. Press the following keys: **3266#

The ISDN LAN Modem reinitializes itself. Wait at least 10 seconds to ensure initialization is complete and then go on to step 4.

3COM 3C892 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Conventions

Year 2000 Compliance

Introduction

Applications

Local Networking with Access to the Internet

Local Networking with Access to a Remote Office

Features

Ease of Installation and Use

High Performance

Connectivity

Routing

Bandwidth Management

Voice Features

Protocols

ISDN Standards and Interface

Security

Upgradability

Diagnostics

Warranty

Internet Applications and Games

Connection Types

LAN Side Connection

WAN Side Connection

Application Sharing over the LAN

Call Routing Protocol and IP Address Transl ation

Call Routing While No Other Calls Are Connected

Understanding Multilink PPP and BACP/BAP

Call Routing While One Call Is Already Connected

What is Multilink PPP?

What is BACP/BAP?

Multilink PPP Configuration Options

Understanding Dynamic Bandwidth Allocation

Understanding VPNs and PPTP

For Windows Dial-Up Networking Users

Package Contents

Before You Install the ISDN LAN Modem

Front Panel LED Description

Installing the ISDN LAN Modem

Before You Begin

Installing the ISDN Cable

Before You Begin

Wall Mounting the ISDN LAN Modem

Using Rubber Feet and Stacking Clips

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

Typical Configuration

Before You Begin

For Windows 98 and 95 Users

For Windows NT 4.0 Users

For Macintosh Users

For Windows 3.11 Users

Configuring the ISDN LAN Modem for the Typical Configuration

ISDN LAN Modem Main Page

Links from the Buttons

Before you Begin

Setting Up Additional Service Providers

When to Select ISP

When to Select Private Network

Before You Begin

Setting Up a Connection to the Internet

Before You Begin

Setting Up a Connection to a Remote LAN

Editing Service Provider Profiles

Restricting Workstations from Accessing Service Provider(s)

Configuring Your LAN Parameters

Name

IP Address and Subnet Mask

Local Domain Name

Enable DHCP Server

Enable NetBIOS Filtering

Changing Data Call Parameters

Minimum Call Duration

Disconnecting an Automatic Data Call

Disconnecting a Manual Data Call