Instruction/ maintenance manual of the product OfficeConnect 3C892A 3Com
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http://www.3com.com/ ® Of ficeConnect ® ISDN LAN Modem User Guide Part No. 984/000026-2 Published January 1999.
3Com Corporation 5400 Bayfront Plaza Santa Clara, California 95052-8145 Copyright © 3Com T echnologies, 1999. All rights reserved. No part of this documentation may be repr oduced in any form or by any means or used to make any derivative work (such as translation, transformation, or adaptation) without permission from 3Com T echnologies.
I MPORTANT S AFETY I NFORMATION W ARNING: Warnings contain directions that you must follow for your personal safety . Follow all instructions carefully . Please read the following information carefully and thoroughly before installing the unit: ■ T ake exceptional care during the installation and removal of the unit.
■ T rennen Sie den Netzadapter von der Stromversorgung, bevor Sie die Einheit bewegen. Die Einheit kann nur von der Stromversorgung getrennt werden, indem Sie die V erbindung des Netzadapters entweder von Einheit oder der Stromquelle trennen.
AVERTISSEMENT: ports de données RJ45 à paires torsadées. Il s'agit de prises de données RJ45 blindées. Elles ne peuvent être utilisées comme prises de téléphone.
■ Per garantire la conformità alle norme di sicurezza nazionali e inter nazionali, usare l'adattatore di corrente fornito con l'unità. Se l'adattatore non è compreso, il cavo alime.
Additional Safety Information ■ Only connect apparatus complying with the relevant interface r equirements to the ports on this unit. ■ Disconnect the power adapter before moving the unit. ■ Retain this user’ s guide for later use and pass it on in the event of change of ownership of the unit.
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T ABLE OF C ONTENTS A BOUT T HIS G UIDE How to Use This Guide 9 Conventions 10 Y ear 2000 Compliance 10 1 I NTRODUCTION Introduction 11 Applications 11 Local Networking with Access to the Internet 11 .
3 H ARDWARE D ESCRIPTION AND I NSTALLATION Package Contents 27 Before Y ou Install the ISDN LAN Modem 27 IBM PC or Compatible Requirements 28 Apple Macintosh Requirements 28 Front Panel LED Descriptio.
6 A DVANCED C ONFIGURATION Before you Begin 59 Setting Up Additional Service Providers 60 ISP versus Private Network 60 When to Select ISP 60 When to Select Private Network 61 Setting Up a Connection .
7 S UPPLEMENTARY V OICE C ALL S ERVICES Supplementary V oice Services 81 Before Y ou Begin 81 Call W aiting and Call Hold 81 Call Hold 81 How to Use Call W aiting 81 Disconnecting a Call on Hold 82 Ca.
Resetting the ISDN Modem Using a T elephone 98 Reviewing Statistics 99 Understanding System Statistics 99 Understanding ISDN Information 100 Understanding Current Call Information 100 Understanding La.
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A BOUT T HIS G UIDE 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 Of ficeConnect ISDN LAN Modem and provides descriptions of key applications and networking concepts.
10 A BOUT T HIS G UIDE Conventions T able 2 and T able 3 list conventions that are used throughout this guide. Y ear 2000 Compliance The OfficeConnect ISDN LAN Modem is Y ear 2000 compliant. Specifically , its system clock is capable of accepting and storing dates including and beyond the year 2000.
1 I NTRODUCTION This chapter provides an overview of the Of ficeConnect ® ISDN LAN Modem, referr ed to throughout this document as the ISDN LAN Modem. These instructions apply to the international version of the product and cover both hardwar e variations, ISDN U (3C892) and S/T (3C891).
12 C HAPTER 1: I NTRODUCTION Local Networking with Access to a Remote Office Users can share access to a r emote of fice LAN while continuing to network locally .
Features 13 Features Ease of Installation and Use ■ 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 W eb.
14 C HAPTER 1: I NTRODUCTION Bandwidth Management ■ Automatic call connection. ■ Automatic disconnection of idle calls after a specified length of time. ■ Bandwidth on Demand using Bandwidth Allocation Control Pr otocol (BACP)/Bandwidth Allocation Protocol (BAP) based on a specified thr eshold.
Features 15 Diagnostics ■ LED status display . ■ Statistics display . W arranty ■ Lifetime Limited W arranty (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 T ransmission Contr ol Protocol (TCP).
16 C HAPTER 1: I NTRODUCTION.
2 ISDN LAN M ODEM F UNCTIONALITY D ESCRIPTION This chapter provides a description of the key functionality of the ISDN LAN Modem. It includes the following topics: ■ Connection T ypes ■ Call Routi.
18 C HAPTER 2: ISDN LAN M ODEM F UNCTIONALITY D ESCRIPTION Figure 4 ISDN LAN Modem LAN Connection with 10 W orkstations An example of a single connection is shown in Figure 5.
Connection Types 19 Figure 6 T wo Simultaneous Remote Connections to Dif ferent Locations 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.
20 C HAPTER 2: ISDN LAN M ODEM F UNCTIONALITY D ESCRIPTION Figure 8 Shar ed Connection to the Same Location LAN Side Connection Application Sharing over the LAN Most operating systems such as W indows 98 and 95 and Macintosh provide the capability for users on the LAN to share applications, files and printers among computers.
Call Routing Protocol and IP Address Translation 21 Call Routing Protocol and IP Address T ranslation This section describes the call routing pr otocol used by the ISDN LAN Modem and explains how IP addresses ar e translated.
22 C HAPTER 2: ISDN LAN M ODEM F UNCTIONALITY D ESCRIPTION Figure 9 IP Addr ess T ranslation Call Routing While One Call Is Already Connected If the ISDN LAN Modem has established a call to a remote d.
Understanding Dynamic Bandwidth Allocation 23 and agrees to use BAP , then the Bandwidth Allocation Pr otocol (BAP) negotiates the addition and removal of the second B channel with the peer equipment based on a user -defined thr eshold.
24 C HAPTER 2: ISDN LAN M ODEM F UNCTIONALITY D ESCRIPTION One of the protocols which enables a VPN to be cr eated is PPTP . The PPTP protocol allows for multiple workstations to establish a secure multi-pr otocol connection to a remote, private network via a single, locally-dialed ISP account as shown in Figure 10.
Understanding VPNs and PPTP 25 For Windows Dial-Up Networking Users If you are using Windows Dial-Up Networking version 1.3, the basic set up steps are as follows.
26 C HAPTER 2: ISDN LAN M ODEM F UNCTIONALITY D ESCRIPTION.
3 H ARDWARE D ESCRIPTION AND I NSTALLATION Package Contents The ISDN LAN Modem package includes: ■ OfficeConnect ISDN LAN Modem ■ Power cable with an AC wall transformer ■ ISDN telephone cable ■ 10BASE-T Ethernet cable ■ 3Com Companion Programs CD-ROM for PCs running W indows 98, 95, W indows NT , W indows 3.
28 C HAPTER 3: H ARDWARE D ESCRIPTION AND I NSTALLATION IBM PC or Compatible Requirements Y our IBM-compatible PC must have the following: ■ A 386, 486, or Pentium processor ■ 10BASE-T Ethernet card ■ Microsoft Windows 98, 95, W indows NT , or W indows 3.
Front Panel LED Description 29 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.
30 C HAPTER 3: H ARDWARE D ESCRIPTION AND I NSTALLATION ■ Four 10BASE-T Ethernet Ports: Connect the computers to these ports or another Ethernet hub to add up to 10 users. ■ ISDN Basic Rate Interface Port: Connect the ISDN cable to this port. Installing the ISDN LAN Modem This section describes how to do the following.
Installing the ISDN LAN Modem 31 Connecting to a 10BASE-T Ethernet Port T o connect a computer to the ISDN LAN Modem, do the following. 1 Insert one end of the 10BASE-T Ethernet cable into one of the four LAN ports on the back of the ISDN LAN Modem, as shown in Figure 14.
32 C HAPTER 3: H ARDWARE D ESCRIPTION AND I NSTALLATION Connecting to Another Ethernet Hub Y ou can connect to another Ether net hub to allow up to 25 users to access the W AN. Instructions for adding another Ethernet hub to allow 10 users, a more common scenario, is as follows.
Installing the ISDN LAN Modem 33 Installing Analog Equipment Y ou can connect an analog touch-tone telephone, answering machine, fax machine, or external analog modem to the ISDN LAN Modem. Y ou will need an RJ-11 to RJ-11 cable that is supplied with the analog device for each analog phone port connection.
34 C HAPTER 3: H ARDWARE D ESCRIPTION AND I NSTALLATION Installing the Power Cable T o install the power cable: 1 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.
Using Rubber Feet and Stacking Clips 35 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 .
36 C HAPTER 3: H ARDWARE D ESCRIPTION AND I NSTALLATION.
4 S ETTING U P TCP/IP FOR W INDOWS AND M ACINTOSH This chapter describes how to set up the W indows and Macintosh operating system (OS) TCP/IP stack. Y our 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.
38 C HAPTER 4: S ETTING U P TCP/IP FOR W INDOWS AND M ACINTOSH Figure 20 Select Network Component T ype Dialog Box 3 Select Protocol and then click Add .
TCP/IP Setup Using Windows 98 and Windows 95 39 Figure 22 Network Dialog Box 8 From the TCP/IP Pr operties dialog box, select the IP Address tab. Figure 23 TCP/IP Pr operties Dialog Box 9 Most users need to select Obtain an IP address automatically because most LANs use dynamic IP addresses.
40 C HAPTER 4: S ETTING U P TCP/IP FOR W INDOWS AND M ACINTOSH Figure 24 Advanced Parameters of TCP/IP Pr operties 11 Click OK to close the TCP/IP Properties dialog box. 12 Click OK to close the Network dialog box. 13 Restart W indows 98 or 95 to let these changes take effect.
TCP/IP Setup Using Windows NT 4.0 41 Figure 25 Windows NT Protocols Confi guration W indow 3 Click Add . The Select Network Protocol dialog box appears as shown in Figur e 26. Figure 26 Select Network Pr otocol Dialog Box 4 Select TCP/IP Protocol and then click OK .
42 C HAPTER 4: S ETTING U P TCP/IP FOR W INDOWS AND M ACINTOSH Figure 28 Network Pr otocols Group Box 8 Click Close. The Microsoft TCP/IP Pr operties window appears, as shown in Figure 29. Figure 29 Micr osoft TCP/IP Properties Window 9 From the Adapter dr op down list box, select the Ethernet card that is connected to the ISDN LAN Modem.
TCP/IP Setup Using Mac OS 7.6 or later 43 TCP/IP Setup Using Mac OS 7.6 or later If you are using Macintosh operating system version 7.6 or later , Open T ransport (OT) PPP is provided and installed by default.
44 C HAPTER 4: S ETTING U P TCP/IP FOR W INDOWS AND M ACINTOSH TCP/IP Setup Using Windows 3.11 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.
TCP/IP Setup Using Windows 3.11 45 Figure 33 Network Setup Dialog Box 9 After the installation is complete, click Close . 10 Click OK . 11 From the MS TCP/IP Configuration dialog box, check the Enable Automatic DHCP Configuration check box and then click OK .
46 C HAPTER 4: S ETTING U P TCP/IP FOR W INDOWS AND M ACINTOSH.
5 C ONFIGURING THE ISDN LAN M 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.
48 C HAPTER 5: C ONFIGURING THE ISDN LAN M ODEM ■ 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. CAUTION: Y ou should only have one computer physically connected to the ISDN LAN Modem during configuration.
Before You Begin 49 dynamic IP address. If an IP addr ess is entered in the IP Addr ess box, then your computer has a static IP address. Setting Up Y our Computer If Y ou Have a Static IP Address If y.
50 C HAPTER 5: C ONFIGURING THE ISDN LAN M ODEM 11 Click OK . For Macintosh Users 1 From the Apple menu, open Control Panels . Double-click TCP/IP . 2 Choose Ethernet from the Connect via dr op-down list box, if not already chosen. The Configure dr op down list box should be set to Manually if you are on a static network.
Before You Begin 51 Configuring the ISDN LAN Modem for the T ypical Configuration T o configure the ISDN LAN Modem for the typical configuration, do the following. If you are using static IP addr essing, you may need the IP address which you recor ded previously in the “Setting Up Y our Computer If Y ou Have a Static IP Address” section.
52 C HAPTER 5: C ONFIGURING THE ISDN LAN M ODEM Figure 36 Set Passwor d Window 3 Enter a password in the Passwor d field and then enter the same password in the Password (r epeat) field to confirm it. If you do not wish to enter a password, leave the fields empty .
Before You Begin 53 There are two choices for the UK, ISDN2 and ISDN2e. Select the one which reflects the ISDN version you are using. ISDN2e is the latest version and therefore the recommended selection. However , you should check with your telephone company to determine the appropriate version to select.
54 C HAPTER 5: C ONFIGURING THE ISDN LAN M ODEM Figure 39 ISP Wizard Window If you do not want to use the ISP Wizard, click Abort . The ISDN LAN Modem configuration main page appears. Refer to “Setting Up Additional Service Providers” for instructions on configuring your ISP connection manually .
Before You Begin 55 15 Specify the B channel rate. 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. 16 Click Continue . A call is launched to your ISP . A congratulations message appears when you successfully connect to your ISP .
56 C HAPTER 5: C ONFIGURING THE ISDN LAN M ODEM 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 .
ISDN LAN Modem Main Page 57 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 Pr oviders page where you can configure a connection to an ISP or a private network.
58 C HAPTER 5: C ONFIGURING THE ISDN LAN M ODEM.
6 A DVANCED C ONFIGURATION 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 of fice LAN, and changing default settings.
60 C HAPTER 6: A DVANCED C ONFIGURATION 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 of fice LAN.
Setting Up Additional Service Providers 61 When to Select Private Network Select private network when you want to connect directly to a r emote, private LAN such as a corporate network, shown in Figure 42.
62 C HAPTER 6: A DVANCED C ONFIGURATION Figure 43 ISP Service Pr ovider Selection Window 3 Click Select . The Internet Service Provider Parameters window appears. Figure 44 ISP Parameters Window 4 In the Name field, enter a name for this remote destination, such as the name of the ISP .
Setting Up Additional Service Providers 63 5 In the T elephone Number 1 field, enter the telephone number you must dial in order to r each your ISP . If the telephone number contains a subaddress, enter the telephone number , followed by an asterisk (*) and then the subaddress number .
64 C HAPTER 6: A DVANCED C ONFIGURATION If you select No , you will have to manually launch a call to this service provider every time you want to connect. Y ou may want to set this field to No if your calls are being connected unintentionally as a r esult of packets generated by your workstations.
Setting Up Additional Service Providers 65 Figure 45 Private Network Service Pr ovider Selection Window 2 Select New Private Network from the dr op-down list box and then click Select .
66 C HAPTER 6: A DVANCED C ONFIGURATION 3 In the Name field, enter a name for this remote destination, such as the name of the location of the office. Y ou may want to add an additional description if you have more than one account with this private network.
Setting Up Additional Service Providers 67 13 Under Miscellaneous, leave the default, NA T enabled, unless you are certain you want to disable it. W ith NA T 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 .
68 C HAPTER 6: A DVANCED C ONFIGURATION static IP addresses (that is, IP addr esses which are not dynamically assigned by the ISDN LAN Modem). ■ Service Provider Usage: Under Enable the use of the following Service Providers , you can see which service providers can be accessed fr om this workstation.
Restricting Workstations from Accessing Service Provider(s) 69 Restricting Workstations from Accessing Service Provider(s) If you want to restrict a workstation(s) on the LAN fr om accessing a service providers(s), do the following. 1 click W orkstation Parameters from the ISDN LAN Modem home page.
70 C HAPTER 6: A DVANCED C ONFIGURATION IP Address and Subnet Mask The IP address is a unique addr ess which identifies the ISDN LAN Modem on a network. The default address (192.168.1.1) is a private IP addr ess which will be translated automatically by the ISDN LAN Modem for Internet access.
Changing Data Call Parameters 71 Configuring the LAN Parameters T o configure LAN parameters, do the following. 1 From the ISDN LAN Modem main page, click the ISDN LAN Modem graphic. 2 In the IP Address field, r eview the default and enter a differ ent IP address if requir ed.
72 C HAPTER 6: A DVANCED C ONFIGURATION Figure 48 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.
Changing Data Call Parameters 73 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 bandwidt.
74 C HAPTER 6: A DVANCED C ONFIGURATION Changing Call Routing This section describes the default setting for routing voice and data calls and provides instructions for changing the way voice and data calls ar e routed.
Changing Country Selection 75 If you would also like to use this telephone number for data calls, check the data box. 5 Click Submit . If you want to password protect the configuration profile of the ISDN LAN modem, refer to “Locking and Unlocking the Configuration”.
76 C HAPTER 6: A DVANCED C ONFIGURATION Reserving DHCP Addresses If you have workstations on your LAN with static IP addr esses and other workstations on the same LAN with dynamic IP addresses, it is r ecommended that you reserve the static IP addr esses in the DHCP server to ensure that they ar e not dynamically assigned to another workstation.
Configuring ISDN Line Parameters 77 minutes. After 5 minutes of inactivity , you ar e locked out of the Web Wizard configuration program. The passwor d 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.
78 C HAPTER 6: A DVANCED C ONFIGURATION Figure 50 ISDN Parameters Window 2 In the T elephone Number 1 field, enter the first telephone number associated with your ISDN line. If any of the telephone numbers that you enter contains a subaddress, enter the telephone number , followed by an asterisk (*) and then the subaddress number .
Configuring the ISDN LAN Modem from a Remote Location 79 Y ou may need to scr oll down to see the Lock Configuration section. A message indicates that the configuration is locked. T o unlock the configuration, do the following. 1 Click Continue . The Enter Password window appears.
80 C HAPTER 6: A DVANCED C ONFIGURATION 15 Click OK to close the Server T ypes window . 16 Click OK to close your connection window . 17 Double-click your new connection icon created via Dial-Up Networking. The Connect T o window will open. Y ou may choose to leave the Username and Password fields blank at this time.
7 S UPPLEMENTARY V OICE C ALL S ERVICES Supplementary V oice Services The ISDN LAN Modem supports the following supplementary voice services. ■ Call W aiting and Call Hold ■ Calling Line Identifi.
82 C HAPTER 7: S UPPLEMENTARY V OICE C ALL S ERVICES T o toggle back and forth between the two calls, simply press and r elease the switch hook button. 3 T o end an initial call when you hear the Call W aiting tone (instead of putting the call on hold) hang up the phone and wait for it to ring.
Supplementary Voice Services 83 Calling Line Identification Restriction Y ou can r estrict presentation of your telephone number(s) on Caller ID devices, either permanently or on a per -call basis. By default CLIR is disabled, meaning that you are allowing your telephone number to be shown on a Caller ID display.
84 C HAPTER 7: S UPPLEMENTARY V OICE C ALL S ERVICES.
8 P LACING , R ECEIVING AND D ISCONNECTING C ALLS This chapter covers the following main topics: ■ Placing calls automatically and manually ■ Receiving calls ■ Disconnecting data calls Placing C.
86 C HAPTER 8: P LACING , R ECEIVING AND D ISCONNECTING C ALLS Placing a Call Manually to an Existing Service Provider T o place a call manually to a service provider that is alr eady 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.
Receiving Calls 87 A message indicates that the call is being placed. A B channel LED on the ISDN LAN Modem front panel illuminates gr een when a connection is established.
88 C HAPTER 8: P LACING , R ECEIVING AND D ISCONNECTING C ALLS Specialized telephone equipment such as some speakerphones, answering machines, and fax machines that require more than 42 V AC ringing voltage may not detect incoming calls. Refer to Appendix D for details.
Disconnecting Data Calls 89 Disconnecting Calls Automatically Using Timers There ar e a number of ways by which you can configure calls to be disconnected automatically . Y ou can set timers and disconnect thresholds from the Data Call Parameters window .
90 C HAPTER 8: P LACING , R ECEIVING AND D ISCONNECTING C ALLS.
9 T ROUBLESHOOTING AND M AINTENANCE This chapter explains how to isolate and solve problems encounter ed with the ISDN LAN Modem. Problems may stem fr om incorrect option settings or impr oper installation. This chapter covers the following main topics.
92 C HAPTER 9: T ROUBLESHOOTING AND M AINTENANCE Monitoring LEDs If you ar e experiencing operational inconsistencies, monitor the ALERT , ISDN, B channel and LAN port status LEDs to isolate problems. Monitoring the ALERT LED Press and r elease the Reset button and observe the ALERT LED.
Monitoring LEDs 93 T r oubleshooting Problems Indicated by LEDs T able T able 8 lists the states of ISDN LAN Modem LEDs which indicate errors and also provides possible causes and solutions. T able 8 T roubleshooting Problems Indicated by LEDs LED LED State Possible Cause Solution ALERT LED ALERT LED remains lit.
94 C HAPTER 9: T ROUBLESHOOTING AND M AINTENANCE Evaluating Symptoms and Solutions T able 9 lists symptoms of common problems, possible causes, and possible solutions. T able 9 Symptoms, Causes, and Solutions Symptom Possible Cause Solution Upon initial setup, communication between the ISDN LAN Modem and my computer cannot be established.
Evaluating Symptoms and Solutions 95 ISDN LAN Modem has assigned all available IP addresses. 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 .
96 C HAPTER 9: T ROUBLESHOOTING AND M AINTENANCE Some application software doesn’t work properly. Application may have an embedded IP address which causes a problem when NAT is enabled on the ISDN LAN Modem. If you have a static network, disable NAT and try using the application again.
Evaluating Symptoms and Solutions 97 Cannot hear dial tone when attempting to place a call using an ISDN LAN Modem phone port. Bandwidth Allocation may be set to Use two B Channels . Go to the appropriate Service Providers page and change the Bandwidth Allocations setting to Add second B channel as required .
98 C HAPTER 9: T ROUBLESHOOTING AND M AINTENANCE Finding More Information For more information about the ISDN LAN Modem, such as fr equently asked questions and specific technical notes go to the following URL: http://www.remoteaccess.3com.com/support/docs/lanmodem and then bookmark this site for quick and easy access.
Reviewing Statistics 99 4 Reconnect the ISDN cable. 5 Restart your computer . 6 Launch your Web br owser . The ISDN LAN Modem begins its initial setup sequence. Reviewing Statistics V arious statistics about LAN and W AN parameters ar e stored and available for review .
100 C HAPTER 9: T ROUBLESHOOTING AND M AINTENANCE Understanding ISDN Information The ISDN statistics provided ar e as follows. Layer 1 status: Indicates whether layer 1 of the ISDN line is up or down. Depending upon your location, layer 1 functions in one of two possible ways.
Reviewing Statistics 101 Understanding Last Call Information The last call information for both B channels (that is, call 1 and call 2) is as follows. T able 14 Understanding Last Call Information Dat.
102 C HAPTER 9: T ROUBLESHOOTING AND M AINTENANCE Understanding Service Provider Information The following Service Provider information is pr ovided after a call has ended.
A N ETWORKING P RIMER This chapter provides a description of basic networking concepts and terminology to help you better understand the key functionality of the ISDN LAN Modem.
104 A PPENDIX A: N ETWORKING P RIMER How does a LAN connect to a W AN? Y ou can connect a LAN to a W AN thr ough a number of devices such as a router or a bridge that can place a call to the remote LAN using a dial-up telephone service such as ISDN. Routers and bridges are devices that link networks.
What is a network? 105 Figure 54 T wo Simultaneous Connections The B channels may also be combined using the Multilink PPP feature to allow one higher speed connection to a single location as shown in Figure 55.
106 A PPENDIX A: N ETWORKING P RIMER What is an IP Address? An IP address is a 32 bit addr ess used by TCP/IP to uniquely identify the location of a device on a network. Note that the IP address does not r efer to the device itself. If, for example, you relocate a PC to another ar ea of the same network, you may need a new IP address.
What is a network? 107 What is DHCP? Dynamic Host Configuration Protocol automatically assigns a unique, temporary IP address to a newly attached computer on an IP network. What is DNS? Domain Name Service translates the common alphabetic name into the numeric IP address.
108 A PPENDIX A: N ETWORKING P RIMER.
B U SING THE C USTOM W EB B ROWSER An Internet Explorer Web br owser tailored for use with your ISDN LAN Modem is provided on the 3Com Companion Programs CD-ROM. Y ou may prefer to use this browser as it has been customized for your ISDN LAN Modem, as shown in Figure 57, making it easier to use.
110 A PPENDIX B: U SING THE C USTOM W EB B ROWSER ■ User Guide Click here to jump to the Internet location of the OfficeConnect ISDN LAN Modem User Guide . Using Favorites Under the Favorites menu, a subcategory labeled 3Com sites lists several helpful sites already bookmarked for you.
C ISDN LAN M ODEM F ACTORY D EFAULTS T able 16 ISDN LAN Modem Factory Defaults LAN Parameters LAN Modem IP Address * * The ISDN LAN Modem attempts to use this default IP address to communicate with the computer during initial configuration. If communication cannot be established initially, the ISDN LAN Modem will change its default IP address.
112 A PPENDIX C: ISDN LAN M ODEM F ACTORY D EFAULTS.
D ISDN LAN M ODEM S PECIFICATIONS Refer to T able 17 for the ISDN LAN Modem specifications. T able 17 ISDN LAN Modem Specifications Network Interface ISDN Basic rate telephone service provided by the telephone company ISDN Interface Type S/T if 3C891; U if 3C892 LAN Interface Ethernet IEEE 802.
114 A PPENDIX D: ISDN LAN M ODEM S PECIFICATIONS Ring Cadences The following table lists the ring cadences for voice calls. The ring cadence is set based on the country you selected when you set up the ISDN LAN modem. T able 18 Country Ring Cadence (in seconds) Australia 0.
Tone Definitions 115 T one Definitions The following table lists the tone definitions for voice calls. T able 19 Tone Cadence Busy tone * * Generated when the ISDN LAN modem does not have an available B channel to place an outgoing voice call. 0.4 on, 0.
116 A PPENDIX D: ISDN LAN M ODEM S PECIFICATIONS.
G LOSSARY B channel Bearer channel. In ISDN communications, a B channel transmits data or voice traffic at a rate of up to 64 Kbps. BRI Basic Rate Interface. A BRI line is one of two access methods to the ISDN; PRI is the other . Each BRI consists of two 64 Kbps B channels and one 16 Kbps D channel for each ISDN line.
118 G LOSSARY Firmware Firmwar e is the code which resides in the ISDN Modem and contr ols its behavior . It differs fr om software in the form of pr ograms that run on your computer . IP address An IP address is a set of numbers that uniquely identifies each device in a network.
G LOSSARY 119 retransmission. Reliability is dependent upon the application. Note that because it does not perform checking, UDP is more ef ficient than TCP .
120 G LOSSARY.
121 I NDEX A analog equipment installation 33 B B channel LEDs 92 , 93 BACP 22 , 117 bandwidth on demand parameters 89 BAP 22 , 117 C call routing analog ports for PC using Windows 74 Challenge Handsh.
122 I NDEX.
Lifetime L IMITED W ARRANTY The duration of the warranty for the OfficeConnect ISDN LAN modem is lifetime (one year if not registered). The duration of the warranty for the power supply is one year. 3Com assumes no liability for phone charges or other expenses incurred in connection with the use of this product.
Agency Approvals This product ostensibly complies with the electro-magnetic compatibility (EMC) requirements of EN 55022 Class A and EN 50082 (susceptibility). However, to ensure compliance with Class B of EN55022, the following prerequisites should be observed: The 4 LAN ports must have a CAT5 cable or better attached.
An important point after buying a device 3Com OfficeConnect 3C892A (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought 3Com OfficeConnect 3C892A yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data 3Com OfficeConnect 3C892A - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, 3Com OfficeConnect 3C892A you will learn all the available features of the product, as well as information on its operation. The information that you get 3Com OfficeConnect 3C892A will certainly help you make a decision on the purchase.
If you already are a holder of 3Com OfficeConnect 3C892A, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime 3Com OfficeConnect 3C892A.
However, one of the most important roles played by the user manual is to help in solving problems with 3Com OfficeConnect 3C892A. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device 3Com OfficeConnect 3C892A along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
