Detailed instructions for use are in the User's Guide.
TABLE OF CONTENTS
1 Introduction
About Your 3Com U. S. Robotics ISDN Terminal Adapter ISDN TA Features Package Contents Before You Install System Requirements for Connections CD-ROM
2 Installing Your ISDN TA
Familiarizing Yourself with Your ISDN TA Connecting Your ISDN TA to Your Computer Connecting the ISDN Cable Connecting Analog Equipment to Your ISDN TA Connecting the Power Cable
3 Installing Software for Your ISDN TA
After Connecting Your ISDN TA Installing ControlCenter
4 Basic Configuration
Starting ControlCenter for the First Time Basic Data and Voice Settings
5 Advanced Configuration
Changing the Data Protocols Used by Your ISDN TA Adjusting Your ISDN TA's PPP Settings Using Dynamic Bandwidth Allocation Using Always On/Dynamic ISDN Using Asynchronous 128K and Advanced Asynchronous 128K Using Your ISDN TA on a Leased Line Returning Your ISDN TA's Settings to the Factory Defaults Setting SPIDs, Telephone Numbers, and TEIs Manually
6 Voice Features
Supported Voice Features Enabling Voice Features Advanced Voice Configuration
7 Getting Online with Your ISDN TA
Windows 95 or 98 Windows NT 4.0 Macintosh Other Operating Systems
8 Dialing, Storing Phone Numbers, and Logging Calls
Placing Calls Manually Dialing for MultiLink PPP Dialing for AO/DI Connections
9 Updating Your ISDN TA
Using Instant Update Flashing Your ISDN TA from Disk Flashing Your ISDN TA Manually with .XMP Flash
10 Using Protocol Decode 11 Configuring Your ISDN TA Using AT Commands
Typing AT Commands ATI12 (Switch Settings) ATI15 (Phone Port Settings) ATI16 (Data Protocol Settings)
12 Troubleshooting Appendix A Â Ordering ISDN Service
Placing Your ISDN Order through 3Com Placing Your Order through Your Telephone Company
Appendix B Â AT Commands and S Registers
Using AT Commands Basic AT Commands AT& Commands AT* Commands AT# Commands S Registers
Appendix C Â Connect Messages Appendix D Â Specifications
ISDN Terminal Adapter Specifications RS-232 Port Pin Specifications Nine-Pin-to-25-Pin Serial Cable Specifications Macintosh Serial Cable Pin Specifications
Appendix E Â Glossary Appendix F Â Copyright Information Appendix G Â Regulatory and Warranty Information
INTRODUCTION
About Your 3Com U.S. Robotics ISDN Terminal Adapter
This 3Com U.S. Robotics ISDN Terminal Adapter allows you to take advantage of Integrated Services Digital Network, a much faster way to connect to the Internet, corporate networks, or other online services. An ISDN line can carry data, voice, and video transmissions at the same time over a single line and support multiple devices on that line. Accordingly, an ISDN line can be used for all of your communications needs. Using your 3Com U.S. Robotics ISDN Terminal Adapter (ISDN TA), you can make or receive regular telephone calls even while you are connected to the Internet or another online service. And using other analog devices, such as your fax machine, while you are online is just as easy. Not only are ISDN connections convenient, but they are also fast  more than twice as fast as your analog modem connection. Your ISDN TA transmits data at speeds of up to 128 Kbps with the highest reliability and error-free performance possible. With compression and a high-speed serial port, it can reach transmission speeds of up to 230.4 Kbps. And using USB, these speeds can be even higher.
ISDN TA Features
Your 3Com U.S. Robotics ISDN TA features the following.
Easy Installation and Use
AutoSPID enables the ISDN TA to download Service Profile ID and telephone number information from the ISDN line (if available). SPID Wizard automatically configures your telephone company switch information and Service Profile ID numbers. ControlCenter, an easy-to-use graphical interface, can be used to configure the ISDN TA's parameters. QuickSelectTM protocol detection discerns the protocol, such as V.120 or PPP, being used by an incoming data transmission and adapts to that protocol. Bellcore National ISDN Ordering Codes support makes ordering a variety of feature-rich ISDN services easier. Plug-and-Play installation.
High Performance
StacTM, AscendTM, and MicrosoftTM compression. An asynchronous RS-232 data port for connecting to your computer at speeds of up to 230.4 Kbps. A 12 Mbps Universal Serial Bus (USB) port.
Protocols
Multilink PPP (RFC 1990). PPP (RFC 1661). Always On/Dynamic ISDN (AO/DI). V.120 rate adaptation. Asynchronous 128K (3Com proprietary). Advanced Asynchronous 128K (3Com proprietary).
ISDN Standards and Interface
Complete digital network termination (Basic Rate ISDN U interface with built-in NT1). Compatible with Lucent, Northern Telecom, and Siemens switches.
Security
Password Authentification Protocol (PAP) and Challenge Handshake Protocol (CHAP) support on both single-channel and Multilink PPP calls. Microsoft Encrypted Password (MS-CHAP) support. ISDN Call Logging displays the five latest outgoing and incoming phone numbers dialed for both voice and data calls.
Voice Features
Dynamic Voice Override allows you to place or receive voice calls while a Multilink PPP or Advanced Asynchronous 128 K transmission is active. Two analog ports for attaching telephone equipment, such as touch-tone telephones, fax machines, or analog modems, to the ISDN line. Support for a variety of supplementary voice services, such as Call Waiting, Call Forwarding, Caller ID, three-way conference calling options, and message waiting indicator.
Cost Saving Features
Dynamic Bandwidth Allocation manages the data flow on your ISDN line's B-channels. Always On/Dynamic ISDN optimizes the use of your ISDN line by taking better advantage of your ISDN line's D-channel. TollMizerTM places data calls over a voice connection saving you the additional charge for a data call.
Upgradability
Instant Update automatically downloads updated versions of your ISDN TA's code.
Diagnostics
ISDN Signaling Protocol Decode. PPP Protocol Decode.
Warranty
Five-year limited warranty.
Package Contents
Make sure your ISDN TA's package contains:
3Com U. S. Robotics ISDN Terminal Adapter Power cable with an AC wall adapter ISDN telephone cable USB cable Set of rubber feet 3Com U. S. Robotics ISDN ConnectionsTM CD-ROM
Before You Install
To install your ISDN TA, you must have:
ISDN service at your location. See the chapter "Ordering ISDN Service," for more information. An available RJ-45 or RJ-11 outlet. ISDN configuration information supplied by your telephone company when you order ISDN service. A computer that meets the system requirements described in the next section, "System Requirements." For IBM-compatible PC users, a straight-through RS-232 modem serial cable with one 25-pin male end and one end to match the female serial port on your computer. Or a computer that supports USB. See the chapter "Installing Your ISDN TA," for more information about your serial cable.
For Macintosh users, a serial cable with one 25-pin male end and one mini DIN eight-pin male serial cable. Or a computer that supports USB.
System Requirements for Connections CDROM
Note: Your ISDN TA will work with any computer that supports modem-type equipment using a serial connection. The system requirements below apply only to the software available on the Connections CD-ROM that came with your ISDN TA. An IBM-compatible PC must have:
486 DX or Pentium® processor Windows® 95, 98, or NT (Windows 98 with Service Pack 1 is required to use USB.) 8 MB RAM 2 MB hard drive space (plus space for a Web browser if you don't already have one installed) Double-speed CD-ROM drive Available serial or USB port
An Apple® Macintosh® must have:
68030 processor (PowerPC® recommended) System 7.1 or higher (System 8.1 with System Enabler 1.0 or System 8.5 is required to use USB.) 8 MB RAM (16 MB recommended) Double-speed CD-ROM drive 3 MB hard drive space (plus space for a Web browser if you don't already have one installed) An available serial or USB port
INSTALLING YOUR ISDN TA
Familiarizing Yourself with Your ISDN TA
You should take a look at the front and back panels of your ISDN TA before installing it.
Front Panel
Figure 2-1 Front Panel LEDs
Alert  Lights amber when there is an ISDN connection problem. Blinks amber when code is being updated. Blinks green when there is voice mail waiting for a telephone connected to the ISDN TA through one of the Analog Device Ports. This LED is off when the ISDN TA is operating normally.
PWR Â Lights green when power is on and remains lighted as long as power is supplied to the unit. B1 Â Lights green when there is a data or voice transmission on B-channel 1. B2 Â Lights green when there is a data or voice transmission on B-channel 2. SD Â Lights green when information is being transmitted from the computer to the ISDN TA. RD Â Lights green when information is being transmitted from the ISDN TA to the computer. DTR Â Lights green when an application is communicating with your ISDN TA. CD Â Lights green when there is an active data connection between the ISDN TA and a remote site, such as an Internet Service Provider or corporate network. (When CD is lighted but B1 and B2 are not, this typically indicates that a data connection has been established over the ISDN line's D-channel in AO/DI mode.)
Back Panel
Figure 2-2 Back Panel Connectors
Power  Connects the ISDN TA to the power cord and adapter, which deliver 12V DC power Analog Device Ports 1 and 2  Connect the ISDN TA to two analog devices, such as a telephone or fax machine USB port  Connects the ISDN TA to your computer's 12 Mbps USB port (if supported on your system) Config button  Resets the ISDN TA to its factory default settings RS-232 port  Connects the ISDN TA to your computer's serial port at rates of up to 230.4 Kbps ISDN port  Connects the ISDN TA to your ISDN outlet (like a telephone line's wall jack)
Connecting Your ISDN TA to Your Computer
Your ISDN TA can be connected to your computer using a serial cable or a USB cable.
Using a Serial Cable
The serial port on your ISDN TA is shown in the illustration of the back panel above. It is labeled "RS-232." You must provide the serial cable. If you are using a Macintosh, you will need a serial cable with one 25pin male end and one mini DIN eight-pin male end. If you are using an IBM-compatible PC, look at the back of your computer to determine what sort of serial cable you should use. The serial port on the back of your computer will likely be labeled "COM," "SERIAL," "RS-232," or "10101." Consult your computer's manual if you have trouble finding a serial port.
If the serial port on your IBM-compatible computer has nine pins, you will need a serial cable with one 25-pin male end and one nine-pin female end. If the serial port on your IBM-compatible computer has 25 pins, you will need a serial cable with one 25-pin male end and one 25pin female end.
Caution: Before connecting your ISDN TA, be sure that your computer is turned off.
To install the cable:
1
Insert the 25-pin male end of the serial cable into the RS-232 serial port on the back of your ISDN TA, as shown below in Figure 2-3. Then tighten the connector screws. Connect the other end of the cable to the serial port you found on the back of your computer. Then tighten the connector screws. If you are using a Macintosh, the port will be circular and labeled .
2
Figure 2-3 Connecting the serial cable
Using a USB Cable
Your ISDN TA came with a USB cable. To connect your ISDN TA to your computer using USB, your computer must use an operating system that supports USB CDC modem devices, such as Windows 98 with Service Pack 1 or later. The USB port on your computer is labeled "USB" or very narrow and rectangular. . It is
To verify that you are using Windows 98 with Service Pack 1 and that USB is enabled:
1 2 3
Click Windows Start, select Settings, and click Control Panel. Double-click the System icon. The "System Properties" screen appears. Your Windows version and service pack version information are listed under "System."
4
Click the Device Manager tab.
If "Universal serial bus controller" appears in the list of system devices without any conflict or warning icons, then USB is configured properly. For further information on how to enable and configure your USB port, consult your computer's users manual or contact the manufacturer. To install the USB cable:
1 2
Insert the six-sided end of the USB cable into the USB port on the back of your ISDN TA, as shown in Figure 2-4. Insert the rectangular end of the cable into the port labeled "USB" or on the back of your computer.
Figure 2-4 Connecting the USB cable
Connecting the ISDN Cable
Your ISDN TA comes with an RJ-45-to-RJ-11 ISDN cable. Before you connect the cable, notice the difference between its two ends. The RJ-45 end of the cable is larger than the RJ-11 end of the cable. To install the ISDN cable:
1
Connect the RJ-45 end of the ISDN ...