This modem provides the following features.

• Modem Capabilities

K56Flex, V.90, 56000bps, 33600bps, 31200bps

ITU-T V.34, V.32bis, V.32, V.23, V.22bis, V.22, V.21, Bell 212A, and 103

V.42LAPM and MNP 2-4, and MNP 10 error correction

V.42bis and MNP 5 data compression

• Fax Capabilities

ITU-T V.33, V.17, V.29, V.27ter, and V.21 Channel 2, 300 to 14400bps.

TIA/EIA 578 Class 1 Fax

• Voice Capabilities

Concurrent DTMF and tone detection

Remote or local telephone answering machine/ voice mail control

Enhanced ADPCM compression/decompression

Record/playback via handset or mic/speaker

• Caller ID
• Speakerphone Capabilities

Full-duplex speakerphone (acoustic and line echo cancellation)

Microphone gain and muting

Speaker volume control and muting

Room Monitor

• ASVD (Analog simultaneous voice and data) or AudioSpan (simultaneous audio/voice and data)

ITU-T V.61 modulation (4.8 kbps data plus audio)

Handset, headset, or half-duplex speakerphone

• Voice View Protocol Support

Voice mode (local handset and FDSP)

Voice View data mode (V.17,V.29,V.27ter,and V.21 ch2)

• Video Ready Modem

Follows H.324, V.80,V.70 DSVD standard

Chapter 1 Installing the modem

1.1 Checking your components

1.2 What else you need

1.3 Installing the modem

1.4 Prerequisites

1.5 Connecting to a computer or terminal

1.6 Connecting to the telephone line

1.7 Connecting to your telephone

1.8 Connecting to an AC outlet

1.9 Using a external MIC and speaker

1.10 Verifying your connection

1.11 Modem LEDs

2.1 Typing a command

2.2 To type a command line

2.3 Correcting a typing mistake

2.4 Readability

2.5 Typing more than 40 characters

2.6 Omitting a parameter

2.7 Repeating a command line

2.8 Modem responses

2.9 Word or numeric responses

2.10 Correction & compression responses

Chapter 3 Using configuration profiles

3.1 Storing a profile

3.2 Recalling a profile

3.3 Reset and recalling profile

Chapter 4 Error correction and data compression

4.1 Error-correction protocols

4.2 V.42

4.3 Configuring for auto-reliable operation

4.4 Configuring for reliable operation

4.5 Turning off error-correction

4.6 MNP5 and V.42bis data-compression

Chapter 5 List of modem commands

Chapter 6 List of modem S-register

6.1 Reading an S-Register value

6.2 Changing an S-Register value

6.3 S-Register descriptions

Chapter 7 Hardware Quick Installation Guide

7.1 FOR WINDOWS 95

7.2 FOR WINDOWS 3.1x or DOS

Chapter 8 Windows 95 / 98 Modem Driver Installation

8.1 Windows 95 (OSR2) Modem Driver Installation (PnP)

8.2 Windows 98 Modem Driver Installation (PnP)

A FCC Compliance

A.1 FCC Notice

A.2 FCC Requirement

B Recommended Initialization Strings

C Pin assignments

C.1 RS-232C Connector

C.2 RS-232C Pin Assignments

D Troubleshooting

This installation guide provides detailed instructions for installing your modem with computer or terminal.

Unpack your components and make sure you have the following items:

• The modem
• A modular telephone cable to connect your modem to the telephone line
• Power adapter
• This installation guide and user's manual
• Communication software and manual (option)
• You will also need an available RS-232 serial port on the personal computer and a properly configured RS-232C interface cable.
• Microphone (option)
• Stereo audio cable (option)
• A driver disk for Windows 95, Windows NT3.51, Windows NT 4.0

When you open your package, make sure all of the above items are included and not damaged. If you see that any components are damaged, please notify your dealer immediately.

To complete your data communication system, you will need the following items:

• Some type of communication software, if not included.
• An optional telephone set ( you do not need to use a telephone with your modem ).

Your modem fits neatly under most standard desk-top telephone. You should place your modem near a 110 or 220 VAC power source (such as a wall outlet). The distance between the modem and your computer, terminal, or printer is determined by the length of your RS-232-C cable.

Be sure you can clearly see the panel LEDs, reach the ON/OFF switch on the back panel, and hear the built-in speaker when you dial calls or the speakerphone is in use.

When connecting your modem to a computer, you will need:

• An available RS-232-C serial port.
• An RS-232-C cable with at least one male connector for connecting to your modem; Your computer's requirements determine the gender of the connector on the other end.
• Software that lets the modem communicates with your computer.

If you lack any of these items, refer to your computer reference manual or contact your computer dealer. If your computer does not have an RS-232C DB25 connector, obtain an adapter cable from your computer dealer.

Use the following procedure to connect your modem to a computer or terminal.

Use the following procedure to connect your modem to the telephone line:

Your modem is so convenient. It provides a second modular telephone jack that lets you connect your telephone to the same telephone line the modem is using. This lets you manually dial data calls or make voice calls when you are not using your modem.

Use the following procedure to connect your telephone to your modem:

Use the following procedure to connect your modem to an AC outlet:

If you want to use an external MIC or speaker instead of using the built-in speaker, you need to insert your external MIC or speaker cable into the round MIC or speaker connector. After you’ve inserted the external MIC or speaker, the default built-in speaker will be disabled.

Before proceeding, make sure your connection matches the one shown in Figure 1-3.

If you connected the modem to a computer, place the computer into terminal mode and complete the configuration information required by the software. Refer to your software manual to find out which commands to use.

Then use the following procedure to verify your modem connections:

If the LEDs did not FLASH, or if you did not receive a response, make sure your computer is sending commands to your modem at a speed of 300, 1200, 2400, 9600, 19200, 38400, 57600 or 115200bps. If this does not solve your problem, contact your computer dealer.

For example, if your modem is connected to the telephone line 555-2121 and Touch-Tone dialing is supported in your calling area, type ATDT 555 2121

Your modem is now ready for operation. Refer to the manual that came with your communication software to begin communication. If you will be communicating directly with your modem, or if you want to find out more about the modem's operation, proceed to use's manual.

• If you want to turn off your modem, set the POWER switch on the back of the modem to the OFF position.

The modem has 9 front panel LEDs, which keep you constantly informed of the modem's status. Figure 1-4 shows the LEDs.

<Back to the Table Contents>

Chapter 2 describes the format to use when typing modem commands. Chapter 2 also describes the responses that your modem sends to your computer screen when you execute, or try to execute, modem commands.

If you will be using a communication software program to make data calls, you will probably not need to type commands, because your software program will handle these tasks for you. Similarly, you will probably not see the responses because your software program may intercept them.

However, if you perform data activities directly with your modem, you will find the format for typing modem commands and modem response helpful.

Using commands, you can have your modem perform a variety of activities, such as dialing or answering a data call or sending a fax. In order to send commands to your modem, You must type a command line while your modem is in command mode.

2.2 To type a command line

1. Type AT. These characters must precede every command line. (except when you type the A/ command)
2. Type the commands you want your modem to execute. A command line can contain up to 40 characters.
3. Press the Enter key. The modem will then execute the commands on the command line.

If you make a mistake while typing a command, press the Backspace key to delete the error. You can delete every command except AT.

To make a command line easy to read, you can insert spaces parentheses, hyphens, and other punctuation in your command line. For example:

Your modem ignores spaces and punctuation when executing a command line, but these characters apply to the 40 characters limit.

If you want to type more than 40 characters on a command line, type a regular command line (up to 40 characters long) and end it with a semicolon as the last character. When you press Enter, your modem executes the commands and returns to command mode, so you can type your next command line.

Some commands require a numeric parameter such as 0,1, or 2. For example, the Q command determines whether your modem sends a modem response after executing a modem command line:

Q0 tells the modem to send responses.

Q1 tells the modem not to send response.

If you type ATQ and press the Enter key without typing a parameter of 0 or 1 after the Q, it's like typing Q0 and the modem will send modem responses.

For your convenience, the last command line you execute remains stored in the modem's memory until you type a new command line and press the Enter key. If you want to re-execute the last command, type A/.

When you want to use the A/ command, you don't need to preface it with the AT characters or end it by pressing the Enter key. Just type A/ to have your modem automatically re execute the last command line.

The A/ command is particularly useful when you want your modem to re-execute a lengthy command line or redial a number that was busy.

You can continue using A/ to automatically re-execute the last command line until you type a new command line that begins with AT or reset your modem, or until your modem loses power.

When you send a command to your modem, it sends a response to your computer. For example, if you send a modem command to your modem, the modem should respond with OK. You may never see these responses, however because certain communication software will intercept them before they can be displayed on your computer screen.

This section describes the modem responses returned by the modem when you communicate directly with the modem. If you will be using a communication software program to make data calls, you may not see these responses because your software program will probably intercept the responses.

Response sets

Modem responses can come from one of five response sets. These response sets are designed X0, X1, X2, X3, and X4.

The response sets determine which modem responses are sent by the modem. They also define certain dialing characteristics and how the modem handles dial tones and busy signals, as described in the following sections.

Modem responses can appear as words or numbers. Your modem is set up to return word responses. Word responses are followed by a carriage return and line feed.

If your modem is operating under an application that handles character strings inefficiently or cannot handle them at all, you can use the V0 command to switch to numeric modem responses. Numeric responses are followed by a carriage return only.

If you do not want to receive modem responses at all, you can use Q1 command to disable them. You may want to disable responses entirely if your modem is connected to a printer and you do not want the modem responses printed.

The X0 response set consists of the first five responses in Table 2-1. with this response set, you receive the CONNECT response for all connections, regardless of the speed at which they're made.

When you send a Dial command line with this response set in effect, the modem will wait two seconds after receiving your Dial command, then automatically dial the telephone number whether or not a dial tone is present This is known as "blind dialing." You may want to use blind dialing if you will be using the modem in an area that has an irregular or weak dial tone that your modem cannot always detect.

The X1 response set consists of the all responses in Table 2-1, except NO DIALTONE, BUSY and NO ANSWER. When you send a Dial command with this response set in effect, your modem will blind dial call.

The X2 response set consists of all responses in Table 2-1, except BUSY and NO ANSWER.

When you send a Dial command with this response set in effect, your modem will listen for a dial tone before dialing. If it does not detect a dial tone within five seconds, it hangs up and returns the NO DIALTONE response.

The X3 response set consists of all responses in Table 2-1, except NO DIALTONE.

When this response set is in effect and you send a Dial command to your modem, your modem will blind dial the call. If the telephone number dialed is busy, your modem will send the BUSY response.

The X4 response set is the factory-default response set. It consists of the all responses in Table 2-1. This response set allows the modem to detect a dial tone and also a busy signal.

If your modem supports the MNP and V.42/V.42bis error-correction and data-compression protocols, you can use the Wn command to enable the extended responses shown in Table 2-1.

• The W command that enables negotiation progress responses is not the same command as the W dialing modifier used in dial command lines.

The default setting, W0, disables extended responses. With W0, all CONNECT response report the DTE speed.

To receive the CARRIER and PROTOCOL responses in Table 2-1, send the W1 command. When this command is in effect, the CONNECT response will show the DTE speed.

If you want the CONNECT response to show the DCE speed rather than the DTE speed, send W2 command. With this command, extended responses will be disabled.

Modems that support the MNP and V.42/V.42bis error-correction and data-compression protocol can also use the \V1 command to append /ARQ to the end of all CONNECT responses when your modem makes an error-correction data connection with a remote modem.

If you do not want /ARQ appended to the end of CONNECT responses when an error-correction data connection is made, send the \V0 command.

* These response are displayed when the W0 or W1 command is in effect.

** These responses are displayed when the W1 command is in effect

<Back to the Table Contents>

Your modem is preset so that you can begin transferring data files as soon as you install the modem and load your communication software.

If you dialing and answering requirements do not match the modem's default configuration profile, you can create your own profiles and store them safely in your modem's nonvolatile memory. The profiles will be saved, even when you turn off your modem. When you need to use a certain profile, send the appropriate command.

You can save two custom configuration profiles in your modem's nonvolatile memory. You save profiles using &Wn command. The n can be the number 0 or 1, which corresponds to the location in nonvolatile memory where you want the profile stored.

Using the &Wn command, you can store the following commands (refer to Chapter 5 for description of these commands):

You can also store the following register values (refer to Chapter 6 for a description of these registers):

The following example shows how you can store a profile. Assume that you want to save the following commands in profile 0:

To do so :

1. Type AT
2. Type the commands shown above
3. Type the &W0 command as the last command on the command line to save these commands as user Profile 0.
4. Press the Enter key. This custom configuration profile is now saved under user Profile 0.

After you store a custom configuration profile, you can recall it using the AT&Yn command. For example, to recall profile 0 :

Type AT&Y0

1. Press the Enter key. The next time you turn on or reset your modem, it will drive its operating characteristics from Profile 0.
2. To recall Profile 1 instead of Profile 0, type AT&Y1 instead of AT&Y0.

If you prefer, you can use ATZn command to reset the modem and load a stored configuration profile : For example, to reset your modem and recall Profile 0 :

1. Type ATZ0

2. Press the Enter key.

Returning to the default profile

1. To return to the factory default profile 0:
2. Type AT&F0

Press the Enter key. Your modem returns to basic asynchronous operation, which is the profile in effect when you received your modem. The following table lists the modem's default profile.

<Back to the Table Contents>

Your modem supports sophisticated MNP 1- 4 and V.42 error- correcting protocols. These protocols ensure the transmission of error-free data - even over noisy, error- prone telephone lines. Your modem also supports the V.42bis and MNP 5 data-compression protocols, which maximizes data throughput and significantly reduces the time needed to exchange data.

Your modem includes two error-correction protocols:

• MNP level 1 through 4
• CCITT V.42

When these protocols are used, the two modems perform calculations on each "packet" of data being exchanged and compare their values. If the values do not match, the receiving modem requests the sending modem to re transmit the packet.

MNP is an acronym for Microcom Networking Protocol. MNP detects and corrects errors that occur when data is exchanged between two systems. Errors can result from telephone- line noise and other signal distortions.

V.42bis the accepted international standard for error correction, ratified by ITU-T in January 1990. It is generally felt that the handshake and protocol establishment process of V.42 is superior to that MNP 4. Therefore, it will provide better initial connections on poor quality telephone lines.

Moreover, while the effective data speed of V.42 and MNP 4 are almost identical over noise-free telephone lines, V.42 provides significantly better performance than the ITU-T- specified MNP4 over noisy telephone lines.

Auto-reliable operation is the modem's default configuration, so if you haven't given the modem any \N commands, it should already be in auto-reliable mode.

Auto-reliable mode lets your modem communicate with both MNP/V.42/V.42bis modems and modems that do not use MNP/V.42/V.42bis :

1. Type AT\N3%C3 (Factory Setting)
2. Press the Enter key. Your modem responds with OK. When your modem originates or answers calls, it will try to make a V.42bis/V.42 connection. If either or both fail, your modem will try to make an MNP connection. If that fails, your modem will try to make a normal connection that does not use error correction.

To communicate with remote MNP modems only:

1. Type AT\N5
2. Press the Enter key. Your modem responds with OK. When your modem originates or answers calls, it will try to make an MNP connection. If that fails, your modem will hang up and return to command mode.

To communicate with remote V.42 modems only:

1. Type AT\N4
2. Press the Enter key. Your modem responds with OK. When your modem originates or answers calls, it will try to make a V.42/V.42bis connection. If that fails, your modem will hang up and return to command mode.

To turn off the MNP/V.42 error correction and communicate with non-MNP/V.42 modems:

1. Type AT\N0 and press the Enter key to return to standard operation with buffering. or AT\N1 and press the Enter key to return to standard operation without buffering.
2. Your modem responds with OK.

There are two major data-compression protocols used in data communications, MNP5 and V.42bis. MNP5 was the first data-compression protocol to be developed and provides a data-compression ratio of 2:1.

In January 1990, ITU-T ratified the V.42bis data-compression protocol as the international standard. V.42bis performs significantly better than MNP5, providing a data-compression ratio of approximately 3:1 - and in some case, up to 4:1.

By supporting both types of data-compression protocols, your modem can communicate with the installed base of MNP5 and V.42bis modems and modems.

To communicate with remote MNP5 modems only

1. Type AT%C1
2. Press the Enter key. Your modem responds with OK. When your modem originates or answers calls, it will try to make an MNP5 connection. If that falls, your modem will hang up and return to command mode.

To turn off V.42bis and MNP5 data compression:

1. Type AT%C0 ; Press the Enter key. Your modem responds with OK.

<Back to the Table Contents>

Chapter 5 describes the modem commands available to your modem. If you will be using a data communication software program to send and receive files, you will probably not need to use these commands, because your software program will handle these tasks for you. However, if you want to bypass your communication software program and perform modem tasks directly with your modem, you will find the commands described in this chapter helpful.

Standard modem commands begin at Table 5-1. MNP/V.42/V.42bis commands begin at Table 5-2. If a command requires parameters such as 0 and 1, the parameter is identified as n in the left column and described in the right column in the following tables.

• Remember that each command, except for +++ and A/, is prefaced by AT and executed when you press the Enter key. To review the format used to send modem commands, refer to Chapter 2.

Please refer to Chapter 4 for more information on MNP/V.42/V.42bis error correction and data compression protocols.

<Back to the Table Contents>

Your modem has S-registers that affect various operating characteristics, let you obtain information about the modem, and let you test the modem. Each S-Register has a factory-set value, which you can read or change to fit your particular requirements. Chapter 6 explains how to read and change S-Register repeatedly. A sequential list of S-Register is also provided.

To read the current value of an S-Register :

1. Type ATSr? from the command mode, where r is an S-Register number.
2. Press the Enter key. The modem responds with decimal value of the S-Register , in three-digit form, followed by OK.

To read values from more than one S-Register :

1. Type ATSr?Sr? from the command mode and press the Enter key. For example, to read the value of Register S0 (auto-answer after the number of rings specified by this S-Register value) and S1(count the number of incoming rings), type ATS0?S1? from the command mode.
2. Press the Enter key. The modem displays the first S-Register value, a carriage return, the next S- Register value, a carriage return, and OK(or 0).

To change an S-Register value, use the Sr=n command, where r is an S-Register number and n is the new value you want to assign to the S-Register. For example, to have the modem auto-answer incoming calls after the third ring:

Type ATS0=3 from the command mode.

1. Press the Enter key. The modem responds with OK or 0 to show it has executed your command and changed the S-Register value. The value remains in effect until the modem is turned off and on, or reset. The modem then revert to its default S-Register values (in this case, Register S0 returns to a value of 0, disabling auto answer).

Table 6-1 summarizes the modem S-Register, their default values, and their functions.