56K USB Mini Fax m o d e m

Quick Installation Guide

#R24.0647.00

rev 1.1 08/06

rev 0.5 07/06

Contents

I n s t a l l a t i on. 1 O p e r at i o n s. 5 T r ou b l e s h oo t i n g. 6 A d d i t i o n a l I n f o r m a t i o n. 9 S u p p or t. 10

English

Installation

Package Contents

! USR5635 56K USB Mini

Faxmodem

! Quick Installation Guide ! Installation CD-ROM
! Telephone cord ! USB cable

Physical Features

State Solid
Function The 56K USB Mini Faxmodem is receiving power. The 56K USB Mini Faxmodem is not receiving power. The 56K USB Mini Faxmodem is active. The 56K USB Mini Faxmodem is not active.

Off Flashing Off

English Back
Function Connects the modem to your telephone line. Connects the modem to your computers USB port.

System Requirements

! Windows XP or 2000 ! CD-ROM drive ! IBM compatible Pentium III 500 MHz ! Available USB port 1.0/1.1/
Processor (or equivalent) or higher 2.0

! 128 MB RAM

Installation Instructions
N o te : You must be logged in to your computer under an account with
administrative privileges before attempting to install the modem drivers.
Step One: Connect the Modem to an Analog Telephone Line

Wa r n i n g :

The 56K USB Mini Faxmodem must be plugged in to an analogue phone line only. Plugging your 56K USB Mini Faxmodem in to a digital phone line may damage the modem. Most office phones are wired through digital lines. Be sure you know what type of line you have.
English 1. Plug one end of the telephone cord into the jack on the modem. 2. Plug the other end into an analogue phone wall jack.
Step Two: Connect the Modem to the Computer 1. Insert the USRobotics Installation CD-ROM. The CD-ROM didnt start automatically? " Windows XP: From the Start menu, select My Computer and doubleclick your CD-ROM drive. If the CD still has not started, double-click

setup.exe

" Windows 2000: From the desktop, open My Computer and doublesetup.exe.
click your CD-ROM drive. If the CD still has not started, double-click
2. Read the license agreement and click Yes. 3. Connect one end of the USB cable to the USB port on your computer. 4. Connect the other end to the port on the modem.
English Step Three: Install the Modem Software 1. The Found New Hardware Wizard appears. Do one of the following: " Windows XP: Select No, not this time and click Next. " Windows 2000: Click Next. 2. Do one of the following: " Windows XP: Select Install the software automatically (Recommended) and click Next. Follow the on-screen instructions to install your modem. If a Hardware Installation warning appears, click Continue Anyway. 1 " Windows 2000: Select Search for a suitable driver for my device (recommended) and click Next. Follow the on-screen instructions to install your modem. If a Digital Signature Not Found warning appears, click Yes. 1 3. If prompted, reboot your computer.
C o n g ra t u l a t i o n s. You have successfully completed the installation procedure. Please register your 56K USB Mini Faxmodem at www.usr.com/productreg/.

Additional Software

Instant Update The Instant Update software automatically notifies you of any available updates for your modem's firmware. To install the Instant Update software: 1. Insert the USRobotics Installation CD-ROM. 1. Select Software. 2. Select Instant Update. 3. Click Install and follow the on-screen instructions to install the Instant Update software. Internet Call Notification Software Internet Call Notification enables the V.92 feature Modem On Hold which allows your Internet connection to be suspended when there is an inbound telephone call.2 1. Insert the USRobotics Installation CD-ROM. 1. Select Software.

1 USRobotics has tested this product and verifies it is compatible with Windows XP and Windows 2000. 2 You must subscribe to Call Waiting service with your phone company in order to use the Modem On Hold/ICN enhancement.
English 2. Select USRobotics Internet Call Notification. 3. Click Install. 4. Select your language and click OK, then follow the on-screen instructions to install the Internet Call Notification software. PhoneTools The PhoneTools program allows you to send and receive faxes and is included as an optional piece of software for your convenience. To install PhoneTools: 1. On the home screen of the USRobotics Installation CD-ROM, select Software. 2. Select PhoneTools. 3. Click Install, then follow the on-screen instructions to install the PhoneTools program.

O p e ra t i o n s

Using Internet Call Notification
If you are connecting to a server that supports V.92:2 1. You will receive a message informing you of an incoming call. In addition, if you subscribe to Caller ID service, the number of the incoming call will display. 2. Click Accept to accept the call, or Ignore to ignore the call. If you choose to accept the call, another message will appear notifying you of the length of time that the provider's system will wait on hold before the data connection is terminated. 3. You can then return to the connection when the call is completed without losing the connection. If you are connecting to a server that does not support V.92: 1. You will receive a message informing you of an incoming call. 2. Click Accept to accept the call, or Ignore to ignore the call. 3. If you choose to accept the call, your data connection will be terminated.
Uninstallation Instructions
To remove the U.S. Robotics 56K USB Mini Faxmodem from your computer: 1. Do one of the following: " Windows XP: Click Windows Start > Control Panel and double-click Add or Remove Programs. " Windows 2000: Click Windows Start > Settings > Control Panel and double-click Add/Remove Programs. 2. Select USRobotics V.92 USB Modem and click Change/Remove. 3. When the computer completes the uninstallation, physically disconnect the modem from the computer.
Tr o u b l e s h o o t i n g
Basic Troubleshooting Procedure
This procedure addresses a number of symptoms that you might experience with your modem: 1. Verify the cables are connected correctly. This includes all cables connecting the telephone line, the modem, and your computer. 2. Refer to the LED descriptions at the beginning of this guide and then check the LEDs on the modem to make sure you are receiving power. 3. Try a different USB port on the computer. If a USB hub is being used, try plugging directly into the USB port on the computer. If you still have trouble using the modem, follow the procedure below that best describes your symptom.

My computer isnt recognising my modem.
Solution 1: Perform the Basic Troubleshooting Procedure above. Solution 2: Check your computer manual to make sure that your USB port is configured properly.
My communications software isn't recognizing my modem.
Solution 1: Remove any previous versions of your communication software and reinstall the communications software provided with your modem on the USRobotics Installation CD-ROM. Verify your modem is installed: 1. Do one of the following: " Windows XP: Click Windows Start > Control Panel. " Windows 2000: Click Windows Start > Settings > Control Panel. 2. Double-click the Phone and Modem Options icon. 3. You should see USRobotics V.92 USB Modem in the list of installed modems. If the incorrect modem or no modems are listed, your modem is not installed properly. Try reinstalling your modem. Solution 2: If you are using Dial-Up Networking, it may not be configured correctly. Check your configuration and make sure you have the correct modem selected. 1. Do one of the following: " Windows XP: Click Windows Start > All Programs > Accessories > Communications > Network Connections. " Windows 2000: Click Windows Start > Programs > Accessories > Communications > Network and Dialup Connection. 2. Right-click the connection you are trying to use, and click Properties. 3. Make sure that the description for the modem is USRobotics V.92 USB Modem. If it doesn't match, select the proper modem description. Solution 3: Your communications software may not function properly if you have more than one version of the software installed, you are using an older version, or you have more than one communications application installed on your system.
My modem wont dial out or doesnt answer incoming calls.
For Both Dialing and Answering Problems Solution 1: You may have a bad phone cord connection to your modem. The phone cord should be plugged into the jack on the modem and into the wall jack. Use the phone cord included in your modems box, if possible.

English Solution 2: You may have devices between the modem and the phone jack. There should be no line splitters, fax machines, or other devices between the modem and the wall jack. Office Users Solution 1: You may have plugged your modems phone cord into a digital line. This will cause permanent damage to your modem. Contact the department responsible for your phone system if you are unsure whether or not your phone line is digital. Solution 2: If your phone system requires dialing 9 to access an outside line, be sure to add 9 before the number you are dialing. Voice Mail Users Solution: If you have voice mail provided by your local phone company, your dial tone may be altered when messages are waiting. Retrieve your voice mail to restore your normal dial tone.
My modem sounds like its trying to connect to another modem but fails.
Solution: You may have a poor connection. All calls are routed differently, so try placing the call again.
My modem isnt achieving a 56K Internet connection.
Solution: The V.92 and V.90 protocols allow for download speeds of up to 56K and the V.92 protocol adds upload speeds of up to 48K, but line conditions may affect the actual speeds during a given connection. In order to achieve a V.92 or V.90 connection, The server youre dialing into must support and provide a digital V.92 or V.90 signal. Your ISP can provide you with a list of dial-up connections and information on what those connections currently support.
ICN does not show the caller ID information.
Solution 1: This feature requires you to have Caller ID service enabled on your line. Contact your telephone service provider to verify that you have caller ID. Solution 2: You may need to add an extra command to your Windows configuration to activate the recognition of the caller identification. 1. Do one of the following: " Windows XP users: Click Windows Start > Control Panel. " Windows 2000 users: Click Windows Start > Settings > Control Panel. 2. Select your modem and click on Properties, then click the Advanced tab. 3. Add the following to the Extra Settings box: +vcid=1

Additional Information

For regulatory and warranty information, see the User Guide on the USRobotics Installation CD-ROM. For operation information, see the User Guide on the USRobotics Installation CD-ROM. For troubleshooting and technical support: 1. See the User Guide on the USRobotics Installation CD-ROM. 2. Go to the Support section of the USRobotics Web site at www.usr.com/support/. Many of the most common difficulties that users experience have been addressed in the FAQ and Troubleshooting Web pages for your modem. The Support pages also contain information on the latest firmware and may contain documentation updates. 3. Submit your technical support question using an online form, or contact the USRobotics Technical Support Department.

Support

1. You can contact the USRobotics Technical Support Department. To receive assistance, you need your serial number.
Model Number 5635 Serial Number

www.usr.com/emailsupport

(888) 428-9450

Pr i n te d i n Xx x x

Pr inte d in X xxx

Windows NT Click Windows Start, Settings, and then Control Panel. Double-click Ports. Make sure the port you are plugging the modem into appears in the list. If it does not, the port needs to be added, and possibly enabled in the BIOS. Consult your Windows NT manual for information about adding ports. After you add or enable the port, follow the instructions on the front of the Installation Guide that came with your modem to install your modem. My software isn't recognizing my modem. Possible solution: Your communications software may not function properly if you have more than one version of the software installed, you are using an older version, or you have more than one communications software installed on your system. We highly recommend using the communications software provided with your modem on the Installation CD-ROM. Possible solution: Make sure the modem is plugged in and turned on. If it is, check the outlet with another electric device (like a lamp) to be sure that you are getting power. Also, you must use the power supply that came with your modem; other similar-looking power supplies may be of different voltages and could damage your modem. When your modem is properly connected to power and is turned on, the CS light on the front panel will be on. Possible solution: Your software's port settings may be incorrect. Make sure the software's port settings match those for your modem. This information is on the Installation Guide that came with your modem. There should be a place in the Setup section of your software for this. Possible solution: Windows 2000 You may not have the correct modem type selected in your software or in Windows. Click on Windows Start, Settings, and Control Panel. When Control Panel opens, click Phone and Modem Options. Click the Modems tab. Here you will see a list of installed modems. You can also add, remove, or view the properties of modems from this window. The U.S. Robotics modem you have installed should be present in the list of installed modems. If none of the modem descriptions in the list matches your U.S. Robotics modem or no modems are listed,
your modem is not properly installed. Try reinstalling your modem using the instructions on the Installation Guide. Windows 95/98/NT You may not have the correct modem type selected in your software or in Windows. Click on Windows Start, Settings, and Control Panel. When Control Panel opens, click Modems. Here you will see a list of installed modems. You can also add, remove, or view the properties of modems from this window. The U.S. Robotics modem you have installed should be present in the list of installed modems. If none of the modem descriptions in the list matches your U.S. Robotics modem or no modems are listed, your modem is not properly installed. Try reinstalling your modem using the instructions on the Installation Guide. Possible solution: Windows 2000 If you are using Dial-Up Networking, it may not be configured correctly. Check your configuration and make sure you have the correct port selected. Click Start, point to Settings and click Network and Dial-up Connections. Make sure that the description in the Connect Using box (under the General tab) matches the description of the modem you are using. If it doesn't match, select the proper modem description. Windows 95/98/NT If you are using Dial-Up Networking, it may not be installed or configured correctly. Check your configuration and make sure you have the correct port selected. Double-click My Computer, double-click Dial-Up Networking, right click on the connection you are trying to use, and select Properties. Make sure that the description in the modem box matches the description of the modem you are using. If it doesn't match, select the proper modem description. My modem won't dial out or doesn't answer incoming calls. For both dialing and answering problems: Possible solution: Make sure that you are using the power supply that came with your modem; other similar-looking power supplies may be of different voltages and could damage your modem. Possible solution:

Internal U.S. Robotics Winmodem Modems
Basic Troubleshooting Steps
(Model Numbers 3CP5699A, 3CPxx5699A, 3CP5695, 3CPxx5695, and 3CPxx2884A)
1. Make sure that your phone cord is properly connected. Remove the phone cord from the modem and wall jacks. Reinsert the cord securely in the wall jack and the modems jack labelled. Use the phone cord included with your modem, if possible. 2. Make sure that your modem is physically installed correctly in your computer. With your computer off, remove the modem and reinstall it in another PCI slot if possible. When the modem is installed correctly, you will no longer see any part of the connector edge, which may be gold or black. See the Installation Guide that came with your modem for instructions more specific to your modem. 3. Make sure you are running a version of Windows that is supported by this product. Check your modems original box to find out which operating systems are supported.
My computer isnt recognizing my modem. Possible solution:
Make sure that your modem is installed correctly in your computer. The modem will fit snugly, and you may need to rock it back and forth firmly to properly seat it in its slot. When the modem is installed correctly, you will no longer see any part of the gold or black connector edge. Possible solution: Windows 2000 Make sure your COM port is not already in use by another modem. Click Windows Start, Settings, and Control Panel, and then double-click Phone and Modem Options. Click the Modems tab. Look for another modem already in the machine. If there is another modem listed, check which COM port it is using. If a previous modem is already using the available COM port, you can either use another COM port or uninstall the previously installed modem. See your previous modem's manual for uninstallation instructions. Make sure that your COM Ports are configured correctly. Right-click the My Computer icon on your desktop. Click Properties. Click the Hardware tab. In the Device Manager section, click the Device Manager button. Look under Ports (COM & LPT). If the COM Ports have
yellow exclamation points or red Xs over them, your COM ports may be configured incorrectly. If this is the case, you may need to contact your computer manufacturer. Possible solution: Windows 95 or 98 Your modem will locate a free IRQ to install itself. For a proper installation, one of these IRQs will have to be free before you install your modem. First uninstall your modem, but do not physically remove it from your computer. Uninstallation directions vary; check the Uninstalling a U.S. Robotics Modem chapter in this manual for the proper method. Then, to free an IRQ for your modem, open Device Manager. Click Windows Start, select Settings, and click Control Panel. Click the System icon, then click the Device Manager tab. In the list of system devices where you found your modem, double-click the Computer icon. The Computer Properties screen will appear. When it does, click the View Resources tab, then click Interrupt request (IRQ) to make sure that it is selected. On the left side of the Computer Properties screen is a list of the system IRQs, numbered 0 through 15. On the right side are the devices that are using these IRQs. Any IRQ numbers not listed on the left side are not being used. Take note of an available IRQ that your modem can use. If a usable, free IRQ does not exist, you may need to remove, disable, or relocate another device. Refer to that devices documentation for more information about removing, disabling, or relocating it. Windows NT Make sure you follow the instructions on the Installation Guide and any addenda included with your modem. The installation of this modem in Windows NT is very specific, and it is possibly different from other installations you have experienced. The steps need to be followed exactly for a successful installation.

Office Users

Possible solution: You may have plugged your modems phone cord into a digital line, which can damage your modem. Contact your phone system administrator if you are unsure whether or not your phone line is digital. If your phone system requires dialing 9 to access an outside line, be sure to add 9 before the number you are dialing.

Voice Mail Users

Possible solution: If you have voice mail provided by your local phone company, your dial tone may be altered when messages are waiting. Retrieve your voice mail to restore your normal dial tone.
My modem sounds like its trying to connect to another modem but fails. My modem isnt achieving a 56K Internet connection.
Possible solution: You may have a poor connection. All calls are routed differently, so try placing the call again. Possible solution: Note: U.S. Robotics 56K modems are capable of receiving downloads at up to 56 Kbps and sending at 31.2 Kbps. Actual download speeds you experience may be lower due to varying line conditions. Maximum download speeds in U.S. and Canada are limited to 53K, due to regulatory limits on power output.
Our research has shown that the vast majority of telephone lines in North America can and do support 56K Installation. The V.90 protocol allows for connection speeds of up to 56K, but line conditions may affect the actual speeds during a given connection. Due to unusual telephone line configurations, some users will not be able to take full advantage of V.90 technology at this time. In order to achieve a V.90 connection, the following must occur: 1. The server youre dialing in to must support and provide a digital V.90 signal. Your ISP can provide you with a list of dial-up connections and information on what those connections currently support. 2. The telephone line between your ISP and your modem must be capable of supporting a 56K connection and contain only one analog-to-digital conversion. The 56K signal from your ISP begins as a digital signal. Somewhere between the ISP and your modem, there will be a analog-to-digital signal conversion so that your modem can receive the data. There must be no more than one analog-to-digital signal conversion in the path from your ISP to your modem. If more than one analog-to-digital conversion occurs, your connect speeds will default to V.34 (33.6). There may also be impairments on the local lines between your ISP and your modem. These impairments can prevent or limit V.90 connection speeds. All telephone calls are routed differently, so you should try making your 56K connection several times. One way to test this is to dial into a long distance location. Long distance lines are often much clearer than local lines. It is important to note that telephone companies are constantly upgrading their systems. Lines that do not support 56K today may support 56K in the near future. 3. Your modem must be connecting to a V.90/56K server. A pair of 56K modems will not connect to each other at V.90/56K speeds.

Possible solution: You may be using a COM port address that is either already in use or not configured correctly. To work properly, this modem needs to be assigned to a free COM port. Windows 2000 Make sure your COM port is not already in use by another modem. Click Windows Start, Settings, and Control Panel, and then double-click Phone and Modem Options. Click the Modems tab. Look for another modem already in the machine. If there is another modem listed, check which COM port it is using. If a previous modem is already using the available COM port, you can either use another COM port or uninstall the previously installed modem. See your previous modem's manual for uninstallation instructions. Next, make sure that your COM Ports are configured correctly. Right-click the My Computer icon on your desktop. Click Properties. Click the Hardware tab. In the Device Manager section, click the Device Manager button. Look under Ports (COM & LPT). If the COM Ports have yellow exclamation points or red Xs over them, your COM ports may be configured incorrectly. If this is the case, you may need to contact your computer manufacturer. Windows 95/98 Make sure your COM port is not already in use by another device. Click Windows Start, Settings, and Control Panel, and then double-click Modems. Look for another modem already installed in your computer. If there is another modem installed, click the Diagnostics tab to find out which COM port it is using. If a previously installed modem is already using the available COM port, you should uninstall that modem. See your previous modem's manual for uninstallation instructions. Right-click the My Computer icon on your desktop. Click Properties. Click the Device Manager tab. Double-click Ports (COM & LPT). If the COM Ports have yellow exclamation points or red Xs over them, your COM ports may be configured incorrectly. If this is the case, you may need to contact your computer manufacturer. Windows NT Turn off your computer and remove your modem. Restart and click Windows Start, Settings, and then Control Panel. Double-click the Ports icon. Your modem must be set to a COM port setting that does not appear in this list.
My software isn't recognizing my modem.
Possible solution: Your communications software may not function properly if you have more than one version of the software installed, you are using an older version, or you have more than one communications software installed on your system. We highly recommend using the communications software provided with your modem on the Installation CD-ROM. Possible solution: Your software's port settings may be incorrect. There should be a place in the Setup section of your software that addresses port settings. Make sure the software's port settings match those for your modem. The Installation Guide that came with your modem explains how to determine your modem's port settings. Check your communication software's documentation for instructions on adjusting the port settings in your software. Possible solution: Windows 2000 You may not have the correct modem type selected in your software or in Windows. Click on Windows Start, Settings, and Control Panel. When Control Panel opens, click Phone and Modem Options. Click the Modems tab. Here you will see a list of installed modems. You can also add, remove, or view the properties of modems from this window. The U.S. Robotics modem you have installed should be present in the list of installed modems. If none of the modem descriptions in the list matches your U.S. Robotics modem or no modems are listed, your modem is not properly installed. Try reinstalling your modem using the instructions on the Installation Guide. Windows 95/98/NT You may not have the correct modem type selected in your software or in Windows. Click Windows Start, Settings, and Control Panel. When Control Panel opens, click Modems. Here you will see a list of installed modems. You can also add, remove, or view the properties of modems from this window. The U.S. Robotics modem you have installed should be present in the list of installed modems. If none of the modem descriptions in the list matches your U.S. Robotics modem or no modems are listed, your modem is not properly installed. Try reinstalling your modem using the instructions on the Installation Guide.

Help Resources

should try making your 56K connection several times. One way to test this is to dial into a long distance location. Long distance lines are often much clearer than local lines. It is important to note that telephone companies are constantly upgrading their systems. Lines that do not support 56K today may support 56K in the near future. 3. Your modem must be connecting to a V.90/56K server. A pair of 56K modems will not connect to each other at V.90/56K speeds.
World Wide Web Contains useful product information, documents, and manuals. Log on to: http://www.usr.com/support/s-contact.asp U.S. Robotics Knowledgebase A Web-based troubleshooting tool that will help you solve problems you may be having with your modem. Go to: http://www.usr.com/kb When the page loads, click the Modems graphic. Then follow the onscreen directions.
Are You Still Having Problems?
1 Review this manual. 2 Call or visit your modem dealer. Your dealer may be able to provide immediate assistance. 3 If your dealer can't help you, contact Customer Support. When you call, specify your modem serial number (found on the modem and on the outside of the box), the model number, and the software being used. The model number is located on the outside of the box. The model number is four sequential numbers and may be preceded by USR. If you do not have the model number, you will have to call the Priority phone number listed below to get it. This call will have a $2.50 per minute charge.
Customer Support via the Phone
Technical questions about U.S. Robotics modems can be answered by technical support specialists. If you can, have your ati7 information written down on a piece of paper before you call tech support. In the United States Regular Phone Service (801) 401-1141 8:00 am - 6:00 pm CST Monday - Friday. Automated service is available 24 hours a day, 7 days a week. Priority, No-Hold Service U.S. Robotics also staffs its own fee-based 900 number for immediate assistance. These lines are staffed from: 8:00 am - 10:00 pm CST Monday - Friday 9:00 am- 5:00 pm CST Saturday - Sunday No-Hold line (900) 555 USR1 For a no-hold call, a $2.50 per minute charge (price subject to change without notice) will appear on your local phone bill. You must be 18 or older or have parental permission. (Service available in the U.S. only.) In Canada (801) 401-1145 8:00 am - 8:00 pm EST Monday - Friday
If You Need to Return the Modem to U.S. Robotics for Repair
Contact U.S. Robotics Customer Support. If the support representative determines that you need to return the modem for repair or replacement, you will receive a SRO (Service Repair Order) number. You must have a SRO number before returning the modem to us. Ship the unit, postage paid, in a strong box made of corrugated cardboard with plenty of packing material. Do NOT send the modem back in the original box. Send ONLY the modem (NOT the power supply, manuals, CD-ROM, etc.). Include your SRO number, name, and address on the shipping label as well as inside the package.

Send the package insured or via a courier capable of tracking the progress of the shipment. Ship to the following address: In the United States: USR-Walnut 528 Spanish Ln. Walnut, Ca 91789 In Canada: U.S. Robotics Unit-100, 13751 Mayfield Pl. Richmond, B.C. Canada V6V 2G9

GLOSSARY

analog loopback A modem self-test in which data from the keyboard or an internal test pattern is sent to the modem's transmitter, turned into analog form, looped back to the receiver, and converted back into digital form. analog signals A variety of signals and wavelengths that can be transmitted over communications lines such as the sound of a voice over the phone line. answer mode The mode used by your modem when answering an incoming call from an originating modem. The transmit/receive frequencies are the reverse of the originating modem, which is in originate mode. application A computer program designed to perform a specific task or set of tasks. Examples include word processing and spreadsheet applications. ARQ Automatic Repeat reQuest. A function that allows your modem to detect flawed data and request that it be retransmitted. See MNP and V.42. ASCII American Standard Code for Information Interchange. A code used to represent letters, numbers, and special characters such as $, !, and /.

CHAPTER 5: GL OSSA RY

asynchronous transmission Data transmission in which the length of time between transmitted characters may vary. Because characters may not be transmitted at set intervals, start/stop bits are used to mark the beginning and end of each character. Auto Answer Sets the modem to pick up the phone line when it detects a certain number of rings. See S-register S0 in the Technical Reference chapter of this manual. auto-dial A process where your modem dials a call for you. The dialing process is initiated by sending an ATDT (dial tone) or ATDP (dial pulse) command followed by the telephone number. Auto-dial is used to dial voice numbers. See basic data command Dn in the Technical Reference chapter of this manual. baud rate A term used to measure the speed of an analog transmission from one point to another. Although not technically accurate, baud rate is commonly used to mean bit rate. binary digit A 0 or 1, reflecting the use of the binary numbering system. Used because the computer recognizes either of two states, OFF or ON. Shortened form of binary digit is bit. bit rate Also referred to as transmission rate. The number of binary digits, or bits, transmitted per second (bps). Communications channels using analog modems are established at set bit rates, commonly 2400, 4800, 9600, 14,400, 28,800 and higher. bits per second (bps) The bits (binary digits) per second rate. Thousands of bits per second are expressed as kilobits per second (kbps).

buffer A temporary memory area used as storage during input and output operations. An example is the modem's command buffer. byte A group of binary digits stored and operated upon as a unit. Most often the term refers to 8-bit units or characters. One kilobyte (KB) is equal to 1,024 bytes or characters; 640 KB is equal to 655,360 bytes or characters. carrier The basic signal altered or modulated by the modem in order to carry information. character A representation, coded in binary digits, of a letter, number, or other symbol. characters per second (cps) A data transfer rate generally estimated from the bit rate and the character length. For example, at 2400 bps, 8-bit characters with start/stop bits (for a total of ten bits per character) will be transmitted at a rate of approximately 240 characters per second (cps). Some protocols, such as error-control protocols, employ advanced techniques such as longer transmission frames and data compression to increase cps. class 1 and 2.0 International standards used by fax application programs and faxmodems for sending and receiving faxes. cyclic redundancy checking (CRC) An error-detection technique consisting of a test performed on each block or frame of data by both sending and receiving modems. The sending modem inserts the results of its tests in each data block in the form of a CRC code. The receiving modem compares its results with the received CRC code and responds with either a positive or negative acknowledgment.
data communications The transmission or sharing of data between computers via an electronic medium. data compression table A table containing values assigned for each character during a call under MNP5 data compression. Default values in the table are continually altered and built during each call: The longer the table, the more efficient throughput gained. data mode Mode used by a modem when sending and receiving data files. DCE Data Communications (or Circuit-Terminating) Equipment, such as dial-up modems that establish and control the data link via the telephone network. default Any setting assumed, at startup or reset, by the computer's software and attached devices. The computer or software will use these settings until changed by the user or other software. digital loopback A test that checks the modem's RS-232 interface and the cable that connects the terminal or computer and the modem. The modem receives data (in the form of digital signals) from the computer or terminal, and immediately returns the data to the screen for verification. digital signals Discrete, uniform signals. In this manual, the term refers to the binary digits 0 and 1. DTE Data Terminal (or Terminating) Equipment. A computer that generates or is the final destination of data.

duplex Indicates a communications channel capable of carrying signals in both directions. See half duplex, full duplex. Electronic Industries Association (EIA) Group which defines electronic standards in the U.S. error control Various techniques that check the reliability of characters (parity) or blocks of data. V.42 and MNP error-control protocols use error detection (CRC) and retransmission of flawed frames (ARQ). facsimile A method for transmitting the image on a page from one point to another. Commonly referred to as fax. fax mode The mode used by a modem to send and receive data in facsimile format. See definitions for V.17, V.27ter, V.29. flow control A mechanism that compensates for differences in the flow of data into and out of a modem or other device. See extended data commands &Hn, &In, &Rn in the Technical Reference chapter of this manual. frame A data communications term for a block of data with header and trailer information attached. The added information usually includes a frame number, block size data, error-check codes, and Start/End indicators. full duplex Signals can flow in both directions at the same time over one line. In microcomputer communications, this may refer to the suppression of the online local echo.
half duplex Signals can flow in both directions, but only one way at a time. In microcomputer communications, may refer to activation of the online local echo, which causes the modem to send a copy of the transmitted data to the screen of the sending computer. Hz Hertz, a frequency measurement unit used internationally to indicate cycles per second. Internet An electronic communications network that connects computer networks and organizational computer facilities around the world. Internet Service Provider A company which provides dial-up (modem) access to the Internet for a fee. ITU-T An international organization that defines standards for telegraphic and telephone equipment. For example, the Bell 212A standard for 1200-bps communication in North America is observed internationally as ITU-T V.22. For 2400-bps communication, most U.S. manufacturers observe V.22 bis. LAPM Link Access Procedure for Modems. An error-control protocol defined in ITU-T recommendation V.42. Like the MNP protocols, LAPM uses cyclic redundancy checking (CRC) and retransmission of corrupted data (ARQ) to ensure data reliability. local echo A modem feature that enables the modem to display keyboard commands and transmitted data on the screen. See basic data command En in the Technical Reference chapter of this manual.

start/stop bits The signaling bits attached to a character before and after the character is transmitted during asynchronous transmission. terminal A device whose keyboard and display are used for sending and receiving data over a communications link. Differs from a microcomputer or a mainframe in that it has little or no internal processing capabilities. terminal mode Software mode that allows direct communication with the modem. Also known as command mode. throughput The amount of actual user data transmitted per second without the overhead of protocol information such as start/stop bits or frame headers and trailers. Compare with characters per second. USB Universal Serial Bus. V.8 The ITU-T standard specification that covers the initial handshaking process. V.17 fax An ITU-T standard for making facsimile connections at 14,400 bps, 12,000 bps, 9600 bps, and 7200 bps. V.21 An ITU-T standard for modems operating in asynchronous mode at speeds up to 300 bps, full-duplex, on public switched telephone networks.
V.22 An ITU-T standard for modem communications at 1200 bps, compatible with the Bell 212A standard observed in the U.S. and Canada. V.22 bis An ITU-T standard for modem communications at 2400 bps. The standard includes an automatic link negotiation fallback to 1200 bps and compatibility with Bell 212A/V.22 modems. V.27 ter An ITU-T standard for facsimile operations that specifies modulation at 4800 bps, with fallback to 2400 bps. V.29 An ITU-T standard for facsimile operations that specifies modulation at 9600 bps, with fallback to 7200 bps. V.32 An ITU-T standard for modem communications at 9600 bps and 4800 bps. V.32 modems fall back to 4800 bps when line quality is impaired. V.32 bis An ITU-T standard that extends the V.32 connection range: 4800, 7200, 9600, 12,000, and 14,400 bps. V.32 bis modems fall back to the next lower speed when line quality is impaired, fall back further as necessary, and also fall forward (switch back up) when line conditions improve (see online fall back/fall forward). V.34 An ITU-T standard that currently allows data rates as high as 28,800 bps. V.34+ An enhancement to V.34 that enables data transfer rates as high as 33,600 bps.
V.42 An ITU-T standard for modem communications that defines a two-stage process of detection and negotiation for LAPM error control. V.42 bis An extension of ITU-T V.42 that defines a specific data compression scheme for use during V.42 connections. V.90 The ITU-T standard for 56 Kbps modem communications. This technology uses the digital telephone network to increase the bit rate of the receive channel by eliminating the analog to digital conversion commonly found in modem connections. V.90 connections require a modem with V.90 or x2 technology calling a digitally connected Internet Service Provider or corporate host site compatible with V.90 or x2 technology. V.92 The ITU-T standard for advanced 56 kbps modem communications. This technology offers three new features to enhance the V.90 standard. The first feature is V.PCM-Upstream, which allows a modems upstream communication to reach speeds of 48,000 bps. The second feature provides quicker connection times by allowing the modem to remember the line conditions of a V.92 supported service provider. The third feature is the Modem On Hold technology, which allows your internet connection to be suspended when there is an inbound telephone call, then return to the connection when the call is completed without losing the connection. The V.92 technology can only be utilized if a V.92 modem is dialing into an Internet Service Provider that supports and provides a digital V.92 signal. World Wide Web A part of the Internet designed to allow easier navigation of the network through the use of graphical user interfaces and hypertext links between different addresses

x2TM Technology U.S. Robotics's trademark for its proprietary technology that uses the digital telephone network to increase the bit rate of the receive channel by eliminating the analog to digital conversion commonly found in modem connections. x2 connections require a modem with x2 technology calling a digitally connected Internet Service Provider or corporate host site compatible with x2 technology. XON/XOFF Standard ASCII control characters used to tell an intelligent device to stop/resume transmitting data. Zmodem Similar to Xmodem and Ymodem, except it includes batch transfer, the ability to recover from a partially complete transfer, an autostart feature, and improved efficiency.
Front-of-the-Case Lights (External Serial Faxmodems)

TECHNICAL REFERENCE

Symbol AA

Meaning Auto Answer mode

Status ON when register S0 is set to 1 or higher (Auto Answer), and when answering a call; OFF when modem originates a call. Light flashes when there is an incoming call. ON if modem receives a valid data signal (carrier) from a remote modem, indicating that data transmission is possible. Always ON if CD override is ON (&C0) Flashes when modem sends result codes or passes received data bits from remote Flashes when computer sends a data bit to modem ON if modem receives a DTR signal from computer. Always ON (modem ignores DTR) if the DTR override is ON (&D0) ON until modem lowers CTS when Transmit Data hardware flow control is enabled (&H1, &H3)

Carrier Detect

Received Data
Send Data Data Terminal Ready

Clear to Send

CHAPTER 6: TEC HN ICA L REFERENC E
Symbol ARQ/Error Control/FAX
Meaning Fax Operations Data Mode
Status Error Control. ON if modem is set to &M4 or &M5 and successfully establishes an error control connection. Flashes when modem retransmits data to remote modem. Fax Mode: flashes to indicate fax mode.
Top-of-the-Case Lights (Voice Faxmodem Pro Externals)

Light POWER SEND RECEIVE

What It Means When Lighted The modem is turned on. The computer is sending a data bit to the modem. The modem is sending result codes or passing received data bits from the remote. The modem is online. (NOTE: This light blinks when the mute feature is being used.)

ONLINE

Typing Commands
Type commands in either upper or lower case, not a combination. Use the Backspace key to delete errors. (You cannot delete the original AT command.) If a command has numeric options and you don't include a number, zero is assumed. For example, if you type ATB, the command ATB0 is assumed. Every command except A/, +++, and A> must begin with the AT prefix and be entered by pressing ENTER.

*Requires @ in dial string; replaces NO CARRIER Yn Selects power-on/reset default configuration. Y0 Y1 Y2 Y3 Y4 Z Use profile 0 setting in NVRAM Use profile 1 setting in NVRAM Use factory configuration 0. Use factory configuration 1. Use factory configuration 2
Resets modem. Z0 Z1 Z2 Z3 Z4 Z5 Resets modem to NVRAM profile selected by Y command or dip 7. Resets modem to NVRAM profile 0 Resets modem to NVRAM profile 1 Resets modem to factory default profile 0 (&F0) Resets modem to factory default profile 1 (&F1) Resets modem to factory default profile 2 (&F2)

Extended Data Commands

&$
Displays a list of ampersand (&) commands.
&An Enables/disables added result code subsets (see Xn). &A0 ARQ result codes disabled &A1 ARQ result codes enabled &A2 V.32 modulation indicator added &A3 Protocol indicators added LAPM/MNP/NONE (error control) and V42bis/MNP5 (data compression) &Bn Manages modem's serial port rate. &B0 Variable, follows connection rate &B1 Fixed serial port rate &B2 Fixed in ARQ mode, variable in non-ARQ mode &Cn Controls Carrier Detect (CD) signal. &C0 CD override &C1 Normal CD operations &Dn Controls Data Terminal Ready (DTR) operations. &D0 DTR override &D1 DTR toggle causes online Command mode &D2 Normal DTR operations &D3 Resets on receipt of DTR &Fn Loads a read-only (non-programmable) factory configuration. &F0 &F1 Generic template Hardware flow control template

&F2

Software flow control template
&Gn Sets Guard Tone. &G0 &GNo guard tone, U.S. and Canada Hz guard tone, some European countries, requires B0 setting.
&GHz guard tone, U.K., requires B0 setting. &Hn Sets Transmit Data (TD) flow control (see also &Rn). &H0 Flow control disabled &H1 Hardware flow control, Clear to Send (CTS) &H2 Software flow control, XON/XOFF &H3 Hardware and software flow control &In Sets Receive Data (RD) software flow control (see also &Rn). &I0 &I1 &I2 Software flow control disabled XON/XOFFsignals to your modem and remote system XON/XOFFsignals to your modem only
&Kn Enables/disables data compression. &K0 Data compression disabled &K1 Auto enable/disable &K2 Data compression enabled &K3 MNP5 compression disabled &Mn Sets Error Control (ARQ) for connections at 1200 bps and higher. &M0 Normal mode, error control disabled &M1 Reserved
&M2 Reserved &M3 Reserved &M4 Normal/ARQ &M5 ARQ mode &Nn Sets connect speed. If connection cannot be made at this speed, the modem will hang up. When used in conjunction with &Un and &Un is greater than 0, &Nn sets the ceiling connect speed. &Un sets the floor connect speed (see also the table in the &Un section). &N0 &N1 &N2 &N3 &N4 &N5 &N6 &N7 &N8 &N9 &N10 &N11 &N12 &N13 &N14 Connection speed is determined by the remote modem. 300 bps 1200 bps 2400 bps 4800 bps 7200 bps 9600 bps 12,000 bps 14,400 bps 16,800 bps 19,200 bps 21,600 bps 24,000 bps 26,400 bps 28,800 bps

&N15 &N16

31,200 bps 33,600 bps
Note: &N17 through &N39 apply only to V.90 and V.92 products. &N17 &N18 &N19 &N20 &N21 &N22 &N23 &N24 &N25 &N26 &N27 &N28 &N29 &N30 &N31 &N32 &N33 &N34 &N35 &N36 28,000 bps 29,333 bps 30,666 bps 32,000 bps 33,333 bps 34,666 bps 36,000 bps 37,333 bps 38,666 bps 40,000 bps 41,333 bps 42,666 bps 44,000 bps 45,333 bps 46,666 bps 48,000 bps 49,333 bps 50,666 bps 52,000 bps 53,333 bps

&N37 &N38

54,666 bps 56,000 bps
&Pn Sets pulse (rotary) dial make/break ratio. &P0 U.S./Canada ratio, 39%/61% &P1 U.K. ratio, 33%/67% &Rn Sets Receive Data (RD) hardware flow control, Request to Send (RTS) (see also &Hn). &R0 Reserved &R1 Modem ignores RTS &R2 Received Data to computer only on RTS &Sn Controls Data Set Ready (DSR) operations. &S0 DSR override; always ON &S1 Modem controls DSR &Tn Begins test modes. &T0 Ends testing &T1 Analog Loopback &T2 Reserved &T3 Local Digital Loopback &T4 Enables Remote Digital Loopback &T5 Prohibits Remote Digital Loopback &T6 Initiates Remote Digital Loopback &T7 Remote Digital with self-test and error detector &T8 Analog Loopback with self-test and error detector
&Un With n > 0, sets the floor connect speed (lowest acceptable connection speed). Note: If your modem cannot connect to the remote modem at or above the speed set with this command, it will hang up. &N=0 &U=0Connects at highest available speed. Note:This default setting should be sufficient for most users. &N>0Connects at fixed speed. &U>0Connects at highest speed above &Un. &N>0 &U>0Connects at highest speed between &Nn and &Un &U0 No minimum connection speed. &U1 &U2 &U3 &U4 &U5 &U6 &U7 &U8 &U9 &U10 &U11 &U12 &U13 &Ubps 1200 bps 2400 bps 4800 bps 7200 bps 9600 bps 12,000 bps 14,400 bps 16,800 bps 19,200 bps 21,600 bps 24,000 bps 26,400 bps 28,800 bps

&U15 &U16

Note: &U17 through &U39 apply only to V.90 products. &U17 &U18 &U19 &U20 &U21 &U22 &U23 &U24 &U25 &U26 &U27 &U28 &U29 &U30 &U31 &U32 &U33 &U34 &U35 &U36 28,000 bps 29,333 bps 30,666 bps 32,000 bps 33,333 bps 34,666 bps 36,000 bps 37,333 bps 38,666 bps 40,000 bps 41,333 bps 42,666 bps 44,000 bps 45,333 bps 46,666 bps 48,000 bps 49,333 bps 50,666 bps 52,000 bps 53,333 bps

allowed to be connected to a telephone interface. The termination on an interface may consist of any combination of devices subject only to the requirement that the sum of the Ringer Equivalence Numbers of all devices does not exceed 5. The Ringer Equivalence Number is located on the bottom of the modem. NOTICE: The Industry Canada (IC) label identifies certified equipment. This certification means the equipment meets certain telecommunications network protective, operational, and safety requirements as prescribed in the appropriate Terminal Equipment Technical Requirements document(s). The Department does not guarantee the equipment will operate to the user's satisfaction. Before installing this equipment, users should ensure that it is permissible to be connected to the facilities of the local telecommunications company. The equipment must also be installed using an acceptable method of connection. In some cases, the company's inside wiring associated with a single-line, individual service may be extended by means of a certified connector assembly (telephone extension cord.) The customer should be aware that compliance with the above conditions may not prevent degradation of service in some situations. Currently, telecommunication companies do not allow users to connect their equipment to jacks except in precise situations that are spelled out in tariffing arrangements with those companies. Repairs to certified equipment should be coordinated by a representative designated by the supplier. Any repairs or alterations made by the user to this equipment, or equipment malfunctions, may give the telecommunications company cause to request the user to disconnect the equipment. AVIS DE CONFORMIT LA RGLEMENTATION D'INDUSTRIE CANADA Cet appareil numrique de la classe B est conform la norme NMB-0003 du Canada. AVIS : L'tiquette d'Industrie Canada identifie le matriel homologu. Cette tiquette certifie que le matriel est conforme aux normes de protection, d'exploitation et de scurit des rseaux de tlcommunications, comme le prescrivent les documents concernant les
exigences techniques relatives au matriel terminal. Le Ministre n'assure toutefois pas que le matriel fonctionnera la satisfaction de l'utilisateur. Avant d'installer ce matriel, l'utilisateur doit s'assurer qu'il est permis de le raccorder aux installations de l'entreprise locale de tlcommunication. Le matriel doit galement tre install en suivant une mthode accepte de raccordement. L'abonn ne doit pas oublier qu'il est possible que la conformit aux conditions nonces cidessus n'empche pas la dgradation du service dans certaines situations. Les rparations de matriel homologu doivent tre coordonnes par un reprsentant dsign par le fournisseur. L'entreprise de tlcommunications peut demander l'utilisateur de dbrancher un appareil la suite de rparations ou de modifications effectues par l'utilisateur ou cause de mauvais fonctionnement. Centre de guarantie et de service aprs-vente: U.S. Robotics Unit-100, 13751 Mayfield Pl. Richmond, B.C. Canada v6v 2G9