5634TS User's Manual

Video Ready Modem With Speakerphone

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Congratulations on the purchasing of one of the most sophisticated modem available. Your modem combines advanced technology with state of the art features and is one of the most advanced communications devices available today! 

Data Mode Capabilities

Fax Mode Capabilities

Speakerphone Capabilities

Voice Mode Capabilities

Caller ID & Distinctive Ring Support

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Trademark

Windows and MS-DOS are trademarks of Microsoft Corporation. IBM PC/AT is a trademark of International Business Machines. Other product or company names are trademarks or registered trademarks of their respective holders.


Table of Contents

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

Chapter 2 Typing commands and receiving responses

2.1 Typing a command

2.2 Correcting a typing mistake

2.3 Readability

2.4 Typing more than 40 characters

2.5 Omitting a parameter

2.6 Repeating a command line

2.7 Modem responses

2.8 Correction & compression responses

Chapter 3 Modem Response Sets & Codes

3.1 X0 response set

3.2 X1 response set

3.3 X2 response set

3.4 X3 response set

3.5 X4 response set

3.6 X5 response set

3.7 X6 response set

3.8 Special Dialing Functions

Chapter 4 Modem Command Set and S-Registers

Chapter 5 Recommended Initialization Strings

Chapter 6 Windows 95 Modem Driver Installation

Chapter 7 Windows 95(OSR2) Modem Driver Installation

7.1 Install the Modem to Windows 95

7.2 Testing the installation of the modem

7.3 Manually Install the Modem

Chapter 8 FCC Compliance

8.1 FCC Notice

8.2 FCC Requirement

A Pin assignments

A.1 RS-232C Connector

A.2 RS-232C Pin Assignments


Chapter 1 Installing the modem

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

1.1 Checking your components

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

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.

1.2 What else you need

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

1.3 Installing the 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.

1.4 Prerequisites

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

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.

1.5 Connecting to a computer or terminal

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

    1. Plug the male DB-25 connector on your RS-232C cable into the RS-232 connector on the back of the modem (see Figure 1-1).

    Figure 1-1. Back of modem

    2. Plug the other end of the cable into the appropriate RS-232C connector on your computer or terminal. If you need assistance, refer to the manual that accompanied your equipment or contact your computer dealer.

    3. After making the connection, check your computer or terminal requirements for the Carrier Detect and Data Terminal Ready signals. The &C command affects the Carrier Detect signal, and &D command affects the Data Terminal Ready signal. Refer to Chapter 5 List of modem commands.

1.6 Connecting to the telephone line

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

  1. Make sure you have an RJ-11 telephone jack. If you need a modular jack, either obtain a telephone adapter from a telephone or electronics store and follow the installation instructions provided with the adapter, or have your local telephone company replace your existing telephone jack with a modular-type jack and your existing telephone cord with a modular cord.
  2. Unplug your telephone's cable from the wall jack.
  3. Take one end of the modular telephone cable supplied with your modem and plug into the LINE jack on the back of the modem (see Figure 1-1).
  4. Plug the other end of the telephone cord into the telephone jack on the wall.

1.7 Connecting to your telephone

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:

1. Connect the telephone's modular cord into the PHONE jack on the back of your modem (see figure 1-1).

2. Lift your telephone's handset and listen for a dial tone.

1.8 Connecting to an AC outlet

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

1. Insert the supplied power cable into the round AC-IN connector next to the POWER switch on the back of the modem (see figure 1-1).

2. Plug the end with the power pack into either a 110 or 220 VAC outlet.

3. Turn the POWER switch to ON position, then the MR LED goes on.

4. Turn on the computer or terminal connected to the modem.

1.9 Using a external MIC and speaker

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.

Figure 1-2 Side view of the modem

1.10 Verifying your connection

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

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Figure 1-3. Completed modem installation

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:

  1. Type AT and press the Enter key. The RD and TD LEDs flash on the modem front panel. If your system is operating properly, your modem sends an OK response to your computer screen and wait for your next command.
  2. 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.

  3. Use your communication software to prepare your computer to dial a call. Then type ATD x phone number, where x is either T for Touch-Tone dialing or P for Pulse dialing and phone number is the telephone number that your modem is using.
  4. 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

  5. Press the Enter key. You should receive a BUSY response and you should hear the busy signal through the modem speaker because the modem is calling itself.

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 user's manual.

1.11 Modem LEDs

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

Figure 1-4. Top panel of modem

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LED

Meaning

AA

AA is Auto-Answer LED. This LED goes ON when the modem is set up to auto-answer incoming calls

CTS

CTS is the Clear To Send LED. This LED goes ON when your modem sends your computer the CTS signal, indicating that the computer can begin transmitting data.

RTS

RTS is the Request To Send LED. This LED goes ON when your modem receives from your computer, indicating that the computer wants to transmit data.

CD

CD is the Carrier Detect LED. This LED goes ON when the modem detects a remote modem's carrier signal. 

OH

OH LED is the Off Hook. This LED goes ON when the modem is off-hook (using the telephone line).

RD

RD is the Receive Data LED. This LED blinks each time your computer receives data from your modem. When data is received at a fast rate, the LED may appear to be ON.

TD

TD is the Transmit Data LED. This LED blinks each time data is being transmitted from your computer's serial port to your modem. When data is being transmitted as fast data rates, this LED may appear to be ON.

TR

TR is the Data Terminal Ready LED. This LED goes ON when the modem is receiving a Data Terminal Ready (DTR) signal from your computer. Your computer sends this sign al when the computer is ready to send or receive data ( DTR is ON ). This LED does not work with Macintosh, which uses the DTR signal for hardware flow control purposes.

FAX

This LED goes ON when error correction is active. This LED flashing is retransmitting data to the remote modem. This LED blinking is in fax mode. This LED goes OFF when error correction not active or not retransmitting data or not in fax mode.

<Back to the Table of Contents>


Chapter 2 Typing commands and receiving responses

This chapter describes the format to use when typing modem commands. This chapter 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 communications software program to make data calls, you probably will not need to type commands, because your software program will handle these tasks for you. Similarly, you probably will 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.

2.1 Typing a command

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

To type a command line:

  1. Type AT. These characters must precede every command line (except when you type the A/ command, described in Chapter 4).
  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.

2.2 Correcting a typing mistake

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

2.3 Readability

You can only use spaces, parentheses, commas, (a comma is equal to 1 or 2 seconds of pause), and hyphens to make a command line easier to read. For example:

AT M3 DT 9, 1(818)123-4567

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

2.4 Typing more than 40 characters

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.

2.5 Omitting a parameter

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 responses.

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.

2.6 Repeating a command line

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.

2.7 Modem responses

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 because certain communications software will intercept them before they can be displayed on your computer screen.

2.8 Correction & compression responses

Modems that support the MNP 2-5 and V.42/V.42bis error-correction and data-compression protocol can also use the &A1 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 want the additional protocol information appended to the /ARQ response, then use &A2. To receive all protocol responses, use &A3.

If you do not want /ARQ appended to the end of CONNECT responses when an error-correction data connection is made, send the &A0 command.

<Back to the Table of Contents>


Chapter 3 Modem Response Sets & Codes

Modem responses can be from one of seven different response sets. These sets are designated by X0, X1, X2, X3, X4,X5, and X6. They also determine different dialing characteristics, please see Chapter 4 for a listing of your modem AT command set.

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Arguments:

0-6

0

Basic subset is selected, according to table below.

1

Extended subset, shown in table below [default]

2-6

Advanced call progress codes, shown in the table below.

3.1 X0 response set

The X0 response set consists of the first five responses in Table 3-1. 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.

3.2 X1 response set

The X1 response set consists of all responses in Table 3-1, except NO DIALTONE, BUSY, and NO ANSWER responses. When you send a Dial command with this response set in effect, your modem will blind dial call.

3.3 X2 response set

The X2 response set consists of all responses in Table 3-1, except BUSY, NO ANSWER and RINGING responses.

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.

3.4 X3 response set

The X3 response set consists of all responses in Table 3-1, except BUSY, NO DIALTONE and RINGING responses.

When this response set is in effect and you send a n for a 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.

3.5 X4 response set

The X4 response set consists of all responses in Table 3-1. This response set allows the modem to detect a dial tone and also a busy signal.

3.6 X5 response set

The X5 response set consists of all responses in Table 3-1, except NO DIALTONE response. This response set allows the modem to detect a dial tone and also a busy signal.

3.7 X6 response set

The X6 response set consists of all responses in Table 3-1. This response set is the same as X4.

3.8 Special Dialing Functions

Below is a table of special dialing functions. These function are activated by the value of the X command. In the case of both Adaptive dialing and Fast dial, neither function will run if the X command is not set for it. In the case of Wait for 2nd dial tone and Wait for answer, only a fixed delay will be used if the X command is not set for them.

Functions

X0

X1

X2

X3

X4

X5

X6

Adaptive dialing  ¡@ ¡@

X

X

X

X

X

Wait 2nd dial tone(W) ¡@ ¡@ ¡@

X

X

X

X

Wait for Answer ¡@ ¡@ ¡@

X

X

X

X

Fast dial ¡@ ¡@

X

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X

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X

Table 3-1 Modem Responses for 5634TS

Word Response

Number Response

Meaning

OK

00

Modem successfully executed a command line.

CONNECT

01

If X0 is in effect, modem made a data connection at 0-300, 1200, 2400, 9600, 19200bps or higher , Otherwise modem made a data connection at 0-300bps.

RING

02

Modem detected an incoming ring.

NO CARRIER

03

Remote carrier signal not detected.

ERROR

04

You typed an invalid command line, a checksum error occurred, or your command line is too long.

CONNECT 1200

05

Modem made a 1200bps data connection.

NO DIALTONE

06

Modem has not detected a dial tone. (this response is enabled when X2, X4 or the W dial modifier is in effect.

BUSY

07

Modem detected a busy signal. (this response is enabled when X3 or X4 is in effect. 

NO ANSWER

08

Modem did not detect silence when dialing a command line containing the @ dial modifier.

CONNECT 2400

10

Modem made a data connection at 2400bps.

RINGING

11

Remote modem is ringing.

CONNECT 9600

13

Modem made a data connection at 9600bps. 

CONNECT/ARQ

14

Modem made a connection, when X0 is in effect

CONNECT 1200/ARQ

15

Modem made an EC connection at 1200bps

CONNECT 2400/ARQ

16

Modem made an EC connection at 2400bps

CONNECT 9600/ARQ

17

Modem made an EC connection at 9600bps

CONNECT 4800

18

Modem made an data connection at 4800bps.

CONNECT 4800/ARQ

19

Modem made an EC connection at 4800bps

CONNECT 7200

20

Modem made a data connection at 7200 bps.

CONNECT 12000

21

Modem made a data connection at 12000bps.

CONNECT 12000/ARQ

22

Modem made an EC connection at 12000bps

CONNECT 7200/ARQ

24

Modem made an EC connection at 7200bps

CONNECT 14400

25

Modem made an data connection at 14400bps.

CONNECT 14400/ARQ

26

Modem made an EC connection at 14400bps.

CONNECT 16800/ARQ

47

Modem made an EC connection at 12000bps.

CONNECT 19200/ARQ

88

Modem made an EC connection at 19200bps .

CONNECT 21600/ARQ

94

Modem made an EC connection at 21600bps .

CONNECT 24000/ARQ

100

Modem made an EC connection at 24000bps.

CONNECT 26400/ARQ

104

Modem made an EC connection at 26400bps.

CONNECT 28800/ARQ

108

Modem made a data connection at 28800bps.

CONNECT 31200/ARQ

152

Modem made an EC connection at 31200bps.

CONNECT 33600/ARQ

156

Modem made an EC connection at 33600kbps.

CONNECT 32000/ARQ

181

Modem made an EC connection at 32000kbps.

CONNECT 40000/ARQ

185

Modem made an EC connection at 40000kbps.

CONNECT 44000/ARQ

189

Modem made an EC connection at 44000kbps.

CONNECT 48000/ARQ

193

Modem made an EC connection at 48000kbps.

CONNECT 49333/ARQ

197

Modem made an EC connection at 49333kbps.

CONNECT 50666/ARQ

205

Modem made an EC connection at 50666kbps.

CONNECT 52000/ARQ

209

Modem made an EC connection at 52000kbps.

CONNECT 53333/ARQ

213

Modem made an EC connection at 53333kbps.

CONNECT 54666/ARQ

217

Modem made an EC connection at 54666kbps.

CONNECT 56000/ARQ

221

Modem made an EC connection at 56000kbps.

CONNECT 57333/ARQ

225

Modem made an EC connection at 57333kbps.

CONNECT 58666/ARQ

229

Modem made an EC connection at 58666kbps.

CONNECT 60000/ARQ

233

Modem made an EC connection at 60000kbps.

CONNECT 61333/ARQ

237

Modem made an EC connection at 61333kbps.

 

Note: EC means Error Correcting.

<Back to the Table of Contents>


Chapter 4 Modem Command Set and S-Registers

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

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, please refer to chapter 2.

Table 4-1. Modem command set for 5634TS

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Modem Command

Description

+++

Keep data connection and move from data mode to command mode 

When your modem enters the data mode, typing +++ allows it to escape to the command mode while preserving the connection to remote modem.

A

Answer command

Force the modem to go off-hook in answer mode without waiting for a ring. Use this command to manually answer an incoming call.

A/

Re-execute last command

Repeat the last command line it executed. Not preceded with AT nor followed by pressing the Enter key. This command is useful when you want the modem to redial a telephone number that was busy. 

Bn

U.S./ITU-T answer sequence
  1. ITU-T V.25 answer sequence. ( default) 
  2. answer tone. 

D

Dial command

Puts the modem into the originate mode, allowing it to automatically dial a telephone number. The telephone number to be dialed, the symbols # and * and the dial modifiers P, R, S=n, T, W, @, !, ; and, can follow the D command.

P

Pulse(rotary) dial (default)

T

Tone dial

,

Two-Second pause; link to S8 register

;

Return to Command mode after dialing

!

Flashes the switch hook

/

Delays for 125 msec. before proceeding with dial

W

Wait for second dial tone (X3 or higher); linked to S6 register 

@

Dials, waits for quiet answer, and continues (X3 or higher)

R

Originates call using answer (reverse) frequencies

#,*

Extended touch tone pad tones

L

Dials the last-dialed number

$

Displays a list of Dial commands

Sn

Dials the phone number string stored in the NVRAM at position n (n=0-3). Phone are stored with the &Zn=s command

En

Echo characters in command mode

Determines whether the modem echoes to your computer screen the keyboard commands you type during command mode

  1. Do not echo commands 
  2. Echo commands (default)

Fn

Echo transmitted data to Terminal (DTE) in Data Mode
  1. Transmitted data is echoed to DTE 
  2. DO not echo (default)

Hn

Hook switch
  1. Go on-hook (hang up modem) 
  2. Go off-hook

In

Displays the followings information
  1. Four-digit product code 
  2. Results of ROM checksum 
  3. Results of RAM self test 
  4. Product type 
  5. Current modem settings 
  6. Nonvolatile memory(NVRAM) settings 
  7. Link diagnostics 
  8. Product configuration 
  9. Reserved 
  10. Plug and Play information 
  11. Reserved 
  12. Call statistics 

Ln

Speaker volume
  1. Low 
  2. Low 
  3. Medium(default) 
  4. High

Mn

Speaker status
  1. Speaker always off 
  2. Speaker on until carrier is detected(default) 
  3. Speaker always on 
  4. Speaker ON after dial, until CONNECT

On

RETURN to data mode after using escape characters to switch to command node
  1. Return to data mode 
  2. Perform equalizer retrain sequence, then return to data mode. A retrain causes the modem to optimize its operating characteristics to obtain the best data transmission. This command works at speeds of 2400 bps or faster.

Qn

Modem responses

Determines whether the modem returns responses after you execute, or try to execute, a modem command. Modem responses are described in Chapter 2.

  1. Send responses to local computer (default) 
  2. Do not send response 
  3. Displays result codes only in Originate mode 
  4. Displays result codes only in Ring mode. 

Sn?

Display the contents of S-Register n 

Refer to Chapter 6 for more information.

Sn=v

Change the value of Register n to v

Refer to Chapter 6 for more information

Vn

Response format

If modem responses are enabled (Q0 in effect), determines whether the responses are shown in numeric or word format.

  1. Numeric response format 
  2. Word response format (default)

Xn

Response set

Determines the response set used.

Result Codes

X0

X1

X2

X3

X4

X5

X6

0/OK

X

X

X

X

X

X

X

1/CONNECT

X

X

X

X

X

X

X

2/RING

X

X

X

X

3/NO CARRIER

X

X

X

X

X

X

X

4/ERROR

X

X

X

X

X

X

X

5/CONNECT 1200

X

X

X

X

X

6/NO DIAL TONE

X

X

X

X

7/BUSY

X

X

X

8/NO ANSWER

X

X

X

X

10/CONNECT 2400

X

X

X

X

X

X

13/CONNECT 9600

X

X

X

X

X

X

18/CONNECT 4800

X

X

X

X

X

X

20/CONNECT 7200

X

X

X

X

X

X

21/CONNECT 12000

X

X

X

X

X

X

25/CONNECT 14400

X

X

X

X

X

X

43/CONNECT 16800

X

X

X

X

X

85/CONNECT 19200

X

X

X

X

X

91/CONNECT 21600

X

X

X

X

X

99/CONNECT 24000

X

X

X

X

X

103/CONNECT 26400

X

X

X

X

X

107/CONNECT 28800

X

X

X

X

X

155/CONNECT 33600

X

X

X

X

X

180/CONNECT 32000

X

X

X

X

X

184/CONNECT 36000

X

X

X

X

X

188/CONNECT 40000

X

X

X

X

X

192/CONNECT 44000

X

X

X

X

X

196/CONNECT 48000

X

X

X

X

X

200/CONNECT 49333

X

X

X

X

X

204/CONNECT 50666

X

X

X

X

X

208/CONNECT 52000

X

X

X

X

X

212/CONNECT 53333

X

X

X

X

X

216/CONNECT 54666

X

X

X

X

X

220/CONNECT 56000

X

X

X

X

X

224/CONNECT 57333

X

X

X

X

X

228/CONNECT 58666

X

X

X

X

X

232/CONNECT 60000

X

X

X

X

X

236/CONNECT 61333

X

X

X

X

X

Functions
Adaptive Dialing

X

X

Wait for 2nd Dial Tone (W)

X

X

Wait for Answer (@)

X

X

Fast Dial

X

X

requires @ in dial string; replaces NO CARRIER

Yn

Elects power-on/reset default configuration

This command tells the modem which profile to use the next time the modem is turned on or reset.

  1. Load Profile 0 (default) 
  2. Load Profile 1 
  3. Generic Template (&F0) 
  4. Hardware Flow Control (&F1) 
  5. Software Flow Control (&F2)

Zn

Reset modem

Resets the modem and loads the configuration profiles stored with the &Wn command. Refer to Chapter 3 for more information.

  1. Resets modem to NVRAM profile selected by Y command 
  2. Resets modem to NVRAM profile 0 
  3. Resets modem to NVRAM profile 1 
  4. Resets modem to factory default profile 0 (&F0) 
  5. Resets modem to factory default profile 1 (&F1) 
  6. Resets modem to factory default profile 2 (&F2) 

&$

Display a list of ampersand (&) commands

&An

Modify responses

Determines whether the modem sends MNP responses. 

  1. ARQ result codes disabled 
  2. Append /ARQ to word CONNECT responses when an error-correction connection is made 
  3. Append additional V.32 indicator in result codes for calls at or above 4800bps. 
  4. Append Protocol of call : /LAPM, /MNP or NONE and V.42bis/MNP5

&Bn

DTE interface speed
  1. Change serial port speed to match bps rate of connection 
  2. Do not change serial port speed; serial port speed is independent of the connection speed. (default) 
  3. In answer mode, fix serial port speed for ARQ calls and change it for non-ARQ calls. 

&Cn

Carrier Detect signal status

Controls the Data Carrier Detect (DCD) signal.

  1. Forced on continuously 
  2. Follows status of remote carrier signal (default)

&Dn

Data Terminal Ready signal status

Determines how your modem reacts to Data Terminal Ready (DTR) signal 

  1. DTR override, DTR is always on 
  2. On-line command mode on DTR low. Modem enters command mode on DTR transition to low state. Returns on-line returns high. 
  3. Computer must send DTR for the modem to accept commands, and dropping DTR terminates a call. (default)

&Fn

Fetch the factory default
  1. Load standard factory configuration : X1, &A1, 
  2. &B0, &H0, &I0,&R1

  3. Load factory configuration 1 Hardware Flow 
  4. control : X4, &A3, &B1, &H1, &I2, &R2

  5. Load factory configuration 2 Software Flow 

control : X4, &A3, &B1, &H2, &I2, &R1

&Gn

Guard tones

Guard tones are used internationally, but are not used in the USA.

  1. Disabled (default) 
  2. Generate 550Hz guard tone, requires B0 setting. 
  3. Generate 1800Hz guard tone, requires B0 setting.

&Hn

Flow control

This command can be used to control the flow of data between your modem and computer. Flow control is necessary when the speed between your computer and modem is different than the speed between your modem and the remote modem.

  1. Disable flow control; 
  2. Enable hardware flow control (CTS) 
  3. Enable software flow control XON/XOFF. 
  4. Enable hardware and software flow control.

&In

XON/XOFF flow control pass through
  1. Disable XON/XOFF flow control. (default) 
  2. Process XON/XOFF signals to your modem and remote system. 
  3. Process XON/XOFF signals to your modem only. 

&Kn

Enable/disable V.42bis and MNP Class 5 data compression
  1. Disable data compression 
  2. Data compression is enabled if the DTE data rate is higher than the link rate, and the remote DCE either supports MNP 5 or V.42bis (default) 
  3. Enable data compression 
  4. Disable MNP 5, but enable V.42bis

&Mn

Set operating mode

Selects the type of asynchronous data connection the modem will try to establish. A modem that uses V.42 can not communicate with one using MNP, since the two error correction protocols are different. However , this command ensures that your modem will be can automatically communicate with modems that use V.42bis, MNP, or no error-correction protocol.

  1. Normal mode. 
  2. Reserved 
  3. Reserved 
  4. Reserved 
  5. auto-reliable mode(default) 
  6. or MNP reliable mode

&Nn

DCE Link Rate

Sets connect speed. If connection cannot be established at this speed, the modem will be hang up.

  1. Variable rate (default) 
  2. Modem Attempt a 300 bps connection 
  3. Modem Attempt a 1200 bps connection 
  4. Modem Attempt a 2400 bps connection 
  5. Modem Attempt a 4800 bps connection 
  6. Modem Attempt a 7200 bps connection 
  7. Modem Attempt a 9600 bps connection 
  8. Modem Attempt a 12000 bps connection 
  9. Modem Attempt a 14400 bps connection 
  10. Modem Attempt a 16800 bps connection 
  11. Modem Attempt a 19200 bps connection 
  12. Modem Attempt a 21600 bps connection 
  13. Modem Attempt a 24000 bps connection 
  14. Modem Attempt a 26400 bps connection 
  15. Modem Attempt a 28800 bps connection 
  16. Modem Attempt a 31200 bps connection 
  17. Modem Attempt a 33600 bps connection 
  18. Modem Attempt a 32000 bps connection (X2) 
  19. Modem Attempt a 36000 bps connection (X2) 
  20. Modem Attempt a 40000 bps connection (X2) 
  21. Modem Attempt a 44000 bps connection (X2) 
  22. Modem Attempt a 48000 bps connection (X2) 
  23. Modem Attempt a 49333 bps connection (X2) 
  24. Modem Attempt a 50666 bps connection (X2) 
  25. Modem Attempt a 52000 bps connection (X2) 
  26. Modem Attempt a 53333 bps connection (X2) 
  27. Modem Attempt a 54666 bps connection (X2) 
  28. Modem Attempt a 56000 bps connection (X2) 
  29. Modem Attempt a 57333 bps connection (X2) 
  30. Modem Attempt a 58666 bps connection (X2) 
  31. Modem Attempt a 60000 bps connection (X2) 
  32. Modem Attempt a 61333 bps connection (X2)

&Pn

Pulse make/break ratio
  1. ratio? US and Canada setting (default) 
  2. ratio? UK and Hong Kong setting

&Rn

Receive data hardware flow control

Enables options for received data hardware flow control.

  1. RTS signal is ignored 
  2. Modem sends data to DTE only if RTS is ON. (default)

&Sn

Data Set Ready signal status
  1. DSR signal always ON (default) 
  2. DSR signal is ON during handshaking and OFF in test or idle mode. DSR is OFF when the remote carrier signal is lost

&Tn

Begins test modes
  1. Ends testing 
  2. Initiates Analog Loopback 
  3. Reserved 
  4. Initiates Local Digital Loopback 
  5. Enables Remote Digital Loopback 
  6. Prohibits Remote Digital Loopback 
  7. Initiates Remote Digital Loopback 
  8. Initiates Remote Digital with self-test and error detector 
  9. Initiates Analog Loopback with self-test and error detector 

&Un

DCE Link Rate Floor

Sets Minimum DCE connection data rates.

  1. Disabled (default) 
  2. 300 bps 
  3. 1200 bps 
  4. 2400 bps 
  5. 4800 bps 
  6. 7200 bps 
  7. 9600 bps 
  8. 12000 bps 
  9. 14400 bps 
  10. 16800 bps 
  11. 19200 bps 
  12. 21600 bps 
  13. 24000 bps 
  14. 26400 bps 
  15. 28800 bps 
  16. 31200 bps 
  17. 33600 bps 
  18. 32000 bps(X2) 
  19. 36000 bps(X2) 
  20. 40000 bps(X2) 
  21. 44000 bps(X2) 
  22. 48000 bps(X2) 
  23. 49333 bps(X2) 
  24. 50666 bps(X2) 
  25. 52000 bps(X2) 
  26. 53333 bps(X2) 
  27. 54666 bps(X2) 
  28. 56000 bps(X2) 
  29. 57333 bps(X2) 
  30. 58666 bps(X2) 
  31. 60000 bps(X2) 
  32. 61333 bps(X2)

&Wn

Write S register values to one of two profiles

The following commands and registers can be stored in nonvolatile memory :

Commands : Bn, Cn, En, Ln, Mn, Qn, Vn, Yn, Xn, &Cn, &Dn, &Gn, &Ln, &Pn........

Register : S0, S2, S6, S7, S8, S9, S10, S11, S12, S18, S25, S26, 

  1. Write S register values to profile 0 
  2. Write S register values to profile 1

Yn

Break handling

This command enables various methods of handling break sequences when a break is received from DTE or remote DCE.

  1. Destructive option. When modem receives break signal from DTE, it clears data from transmit buffer, but does not pass break to DCE . Both local and remote modems resets data (default) 
  2. Expedited destructive option. When modem receives break signal from DTE, it clears data from transmit buffer and sends break to DCE, also resets data compression tables. 
  3. Expedited nondes