VOICE/FAX/DATA MODEM USER'S MANUAL

VOICE/FAX/DATA MODEM

USER'S MANUAL

Table of Contents

1 - INTRODUCTION

2 - COMMAND REFERENCE

2.1 General Command Information 

2.2 AT Commands 

2.2.a Commands Preceded by & 

2.2.b Commands Preceded by  

2.2.c Commands Preceded by % 

2.2.d Commands Preceded by + 

2.3 Dial Modifiers 

2.4 Commands Not Preceded By AT 

2.5 Result Codes 

3 - S REGISTER REFERENCE

3.1 Register Summary 

3.2 Glossary of the S Registers 

4 - TROUBLESHOOTING GUIDE

5 - APPLICATION EXAMPLES

5.1 Dialing a Remote Modem 

5.2 Manual Answer an Incoming Call

5.3 Auto Answer an Incoming Call 

A - CALLER ID & DSVD COMMANDS

B - TECHNICAL SPECIFICATIONS

C - QUICK REFERENCE

D - GLOSSARY

E - ASCII CODE TABLE

1 - INTRODUCTION

Congratulations on your purchase of this outstanding Fax/Data Modem. This manual describes how to operate your new Fax/Data Modem.

Instructions for installing your Fax/Data Modem will be found in the Installation Manual, while the information in this manual, deals exclusively with the operation of the modem after it is installed, such as the command set, the internal configuration registers, troubleshooting and testing.

Features:

These Fax/Data Modems combine the features of a 56000(receive only)/33600/28800/14400/9600 bps data modem and a 14400/9600 bps FAX modem. Your new Fax/Data Modem gives your personal computer the ability to send and receive FAX messages over the telephone line like a standard FAX machine. Your Fax/Data Modem also allows your PC to communicate with other personal computers, terminals or BBS (Bulletin Board Systems) through the data modem functions.

When used as a data modem your Fax/Data Modem uses the standard AT command set and is fully compatible with ITU-T V.42, V.42bis, V.34 , V.32bis, V.32, V.22bis, V.23, V.22, V.21, MNP 2-5, Bell 103, 212A, K56flex, and V.90. When used as a Fax Modem it communicates with all ITU-T Group 3 FAX machines and is compatible with ITU-T V.27ter and V.29, V.17, T.4 and T.30. Switching between DATA mode operation and FAX mode operation of your Fax/Data Modem is done through its firmware, no hardware settings are required.

If you are already familiar with the use of a modem and the Hayes AT command set, this modem will be extremely easy for you to use. Just read the installation procedures in the installation manual and you are ready to begin operation. If you are new to modem communications, we recommend that you read through this manual first. If you come across terms that you don't understand, consult the glossary. Words in boldface type are command names, commands, or default settings. Carriage returns (Enter) are noted with <CR> or [ENTER]; this does not mean to enter these characters literally; but instead to press the Enter key.

The communication software which should be used depends on the kind of machine that you are going to communicate with. If you are going to call a FAX machine then you must use the Fax software. If the machine that you are going to communicate with is a modem then you must use a data modem communications software.

This manual is written to be used for several models of Fax/Data Modems. Some of the information in this manual may not apply to your Fax/Data modem.

2 - COMMAND REFERENCE

This chapter provides an alphabetized reference with examples for all commands for the modem. The system of commands is depicted below in Figure 2-1.

To use these commands for dialing or configuring the modem, make sure the communications software package you will be using lets you operate the modem through its internal commands. If your software permits use of the modem internal commands, read this chapter. If not, read your software user manual and ignore the rest of this manual.

General Command Information

Except for the A/ command and the +++ escape command described in Section 2.4, all commands must be prefixed with the attention code AT. For instance, the A command (below) would be entered as: T A<CR>'. Without the AT prefix, the command line cannot be executed. Once entered, AT cannot be deleted with the Backspace or Delete key.

More than one command can be placed on a single line and, if desired, separated with spaces for readability. Once the carriage return (Enter) key is pressed, the command line is executed. A line with no carriage return is ignored.

The modem accepts either upper or lower case characters in the command line and ignores any spaces within or between commands. Typing errors can be corrected with the Backspace key. Exceptions are noted in the description of specific commands.

Variables (r and x) are listed in italics. Punctuation symbols (, ; ! @) use as dial modifiers are listed alphabetically according to their English names at the beginning of Section 2.3. Where two commands are separated by a slash, either command will have the same effect. For example, if the command is listed as H0/H, issuing either H0 or H will have the same effect.

AT Commands

A Go On-line in Answer Mode

This command instructs the modem to go off-hook immediately and then make a handshake with the remote modem. Handshaking is not available during leased line operation.

A is usually used to manually answer an incoming call or to switch from voice conversation to data communication.

D Go On-line in Originate Mode

D instructs the modem to go off-hook immediately and automatically dial the number contained in the dial string following D. The dial string may contain any of the dial modifiers contained in the following section. The D command without a dial string is usually used to switch from voice conversation to data communication or to call a remote modem in leased-line operation mode.

En Command Echo

E0/E Disables command echo.

E1 Enables command echo. (default)

Hn Hang Up

H0/H Goes on-hook. (hangs up)

H1 Goes off-hook. (ready to dial)

In Identification

I0/I Reserved.

I1 Reserved.

I2 Reserved.

I3 Report firmware revision.

I4 Report OEM defined identifier string.

I5 Reserved.

I6 Report modem data pump model and internal code revision.

I7 Reserved.

Ln Control Speaker Volume

L0/L Off.

L1 Low volume. (default)

L2 Medium volume.

L3 High volume.

Mn Monitor Speaker On/Off

M0/M Speaker is always off.

M1 Speaker is off while receiving carrier. (default)

M2 Speaker is always on.

M3 Speaker is off when dialing or receiving carrier.

On Return to On-Line Data Mode

O0/O Enters on-line data mode without a retrain. Handling is determined by the Call Establishment task. Generally, if a connection exists, this command connects the DTE back to the remote modem after an escape (+++).

O1 Enters on-line data mode with a retrain before returning to on-line data mode.

P Set Pulse Dial as Default

Causes the modem to assume that all subsequent dial commands are pulse dials. You may omit the ' P ' from the dial strings.

Q Result Code Display

Determines whether the modem sends the result codes to the DTE.

Q0/Q Enables result codes to the DTE (default).

Q1 Disables result codes to the DTE.

Sn Read / Writing S Registers

Sn? Reports the value of S-Parameter n.

Sn=x Set S parameter n to the value x

Writes the value of x to the specified S register. All the registers will return the OK response if x is a legal value. However some registers will not actually write the value.

T Set Tone Dial as Default

Causes the modem to assume that all subsequent dial commands are tone dial.

Vn Select Word or Digit Result Codes

V0/V Displays result codes in digital format.

V1 Displays result codes in verbose format. (default)

Xn Extended Result Codes

This command selects which subset of the result messages will be used by the modem to inform the DTE of the results of commands.

Blind dialing is enabled or disabled by country parameters. If the user wishes to enforce dial tone detection, a 'W' can be placed in the dial string(see D command). Note that the information below is based upon the default implementation of the X results table.

If the modem is in facsimile mode (+FCLASS=1) , the only message sent to indicate a connection is CONNECT without a speed indication.

X0/X CONNECT result code is given upon entering online data state. Dial tone and busy detection are disable.

X1 CONNECT<text> result code is given upon entering online data state. Dial tone and busy detection are disable.

X2 CONNECT<text> result code is given upon entering online data state. Dial tone detection is enabled, and busy detection is disable.

X3 CONNECT<text> result code is given upon entering online data state. Dial tone detection is disabled, and busy detection is enable.

X4 CONNECT<text> result code is given upon entering online data state. Dial tone and busy detection are enable.(default)

Z Reset to Default Configuration

This command must be placed at the end of the command line, resets the active configuration of the modem to the stored configuration saved in non-volatile RAM, hangs up the modem, and clears the command buffer.

2.2.a Commands Preceded by &

&Cn Select DCD Options

&C0/&C DCD ( Data Carrier Detect ) is always ON .

&C1 DCD follows the state of the carrier. (default)

&Dn Select DTR Options

Determines actions taken by the modem in relation to the Data Terminal Ready (DTR) signal of the serial port.

&D0/&D Modem ignores DTR.

&D1 DTR drop causes the modem enters online command state and the call remains connected.

&D2 DTR drop causes the modem to hang up. Auto answer is inhibited. (default)

&F Fetch Factory Configuration

Set all parameters to factory default values.

&Gn Select Guard Tone

&G0/&G - G1 Disable guard tone. (default)

&G2 Select 1800Hz guard tone.

&Kn DTE/Modem Flow Control

Determines how the modem controls the flow of data between the local DTE and the modem. When the modem terminal buffer is nearly full, the modem will either sendn XOFF or drop CTS to stop the data flow. When the buffer is nearly empty, the modem will either send an XON or raise CTS to start the data flow.

&K0/&K Disable DTE/DCE flow control.

&K3 Enable RTS/CTS DTE/DCE flow control.

&K4 Enables XON/XOFF DTE/DCE flow control.

&K5 Enables transparent XON/XOFF DTE/DCE flow control.

&K6 Enable RTS/CTS and XON/XOFF DTE/DCE flow control. (default)

&Pn Select Pulse Dial Make/Break Ratio

&P0/&P Sets a 39/61 make/break ratio at 10 pulses per second @ 10 pps - used in USA. (default)

&P1 Sets a 33/67 make/break ratio @ 10 pps.

&P2 Sets a 39/61 make/break ratio @ 20 pps.

&P3 Sets a 33/67 make/break ratio @ 20 pps.

&V View Configuration Profiles

Displays the current (active) configuration and the stored profile.

&W Store the Current Configuration to Nonvolatile RAM

This command saves the current (active) configuration, including S-Parameters in non-volatile RAM.

2.2.b Commands Preceded by

Nn Operation Mode Control

Selects the operating mode to be used during connection

N0 Selects Normal (speed buffering) Mode.

N1 Selects Direct (pass-through) Mode.

N2 Selects Reliable Link Mode.

N3 Selects Auto-reliable Mode. Modem attempts to connect with error correction.

N4 Select LAPM error-correction mode.

N5 Select MNP error-correction mode.

2.2.c Commands Preceded by %

%C Enable/Disable Data Compression

Enables or disable data compression negotiation.The modem can only perform data compression on an error corrected link.The parameter value, if valid, is written to S41 bits 0 and 1.

%C0 Disables data compression.

%C1 Enables MNP 5 data compression negotiation.

%C2 Enables V.42 bis data compression.

%C3 Enables both V.42 bis and MNP 5 data compression. (default)

%En Enable/Disable Line Quality Monitor and Auto-Retrain or Fallback/Fall Forward

Control whether or not the modem will automatically monitor the line quality and request a retrain (%E1) or fall back when quality is insufficient or fall forward when line quality is sufficient (%E2)., the modem attempts to retrain for a maximum of 30 seconds.

%E0%E Disable line quality monitor, auto-retrain, and auto-rate renegotiation .

%E1 Enable line quality monitor, auto-retrain, and auto-rate renegotiation.

%L ( Option ) Line Signal Level

Returns a value identifying the received signal level. The possible values are:

-9 dBm.

-10 dBm.

-11 dBm.

-43 dBm.

%Q ( Option ) Line Signal Quality

Reports the line signal quality (DAA dependent). Returns the higher order byte of the EQM value. Based on the EQM value, retain or fallback/fall forward may be initiated if enabled by %E1.

2.2.d Commands Preceded by +

+EB Break Handing in Error control Operation

This extended format compound parameter control the break handing in V.42 operation.

Syntax

+EB = [<break_selection>[,<timed>[,<default_length>]]]

Defined Values

<break_selection> :

Specifying that break is to be ignored i.e., not signal to remote DCE

<timed> :

Specifying that any transmitted V.42 L-SIGNAL will not indicate break signal length

<default_length> :

Specifying that break is not delivered to the DTE

+DR Data Compression Reporting

Syntax

+DR=[<value>]

Defined Values

<value>

0 : Data Compression reporting disabled

1 : Data Compression reporting enabled (default)

Error control reporting is as bellows:

+DR: NONE Data Compression not in use

+DR: V42B V.42bis is in use in both direction.

+DR: ALT MNP 5 Compression

+DS Data Compression

Syntax

+DS=[<direction>[,<compr_neg>[,<max_dict>[,<max_string>]]]]

Defined Values

<direction> Specifies the desired directions of operation of the dada compression function; from the DTE point of view.

0 : Negotiated ;no compression ( V.42bis P0=0 ).

3 : Both directions, accept any direction ( V.42bis P0=11 ).(default)

<compr_neg> Specifies whether or not the modem should continue to operate if the desired result is not obtained

0 : Do not disconnect if V.42bis is not negotiated by the remote modem as specifies in <direction>.

<max_dict> Specifies the maximum number of dictionary entries ( 2048 entries ) which should be negotiated.

<max_string> Specifies the maximum string length ( 32 bytes ) to be negotiated (V.42bis P2 ).

Data Compression reporting is as bellows:

+DS: NONE Data compression is not in use

+DS: V42B V.42bis is in use in both directions.

+DS: ALT MNP 5 compression

+ER Error Control Reporting

Syntax

+ER=[<value>]

Defined Values

<value>

0 : Error control reporting disabled

1 : Error control reporting enabled (default)

Error control reporting is as bellows:

+ER: NONE Error control is not in use

+ER: LAPM V.42 LAPM protocol is in use.

+ER: ALT MNP is in use

+ES Error Control and Synchronous Mode Selection

Syntax

+ES=[< orig_rqst>[,<orig_fbk>[,<ans_fbk>]]]

Defined Values

<orig_rqst> : Specifies the initial requested mode of operation when the modem is operating as the original

Initiate call with Normal Mode (also referred to as Buffered Mode or Direct Mode) only.

Initiate V.42 without Detection Phase. If V8 is in use, disable V.42 Detection Phase.

Initiate V.42 with Detection Phase.

Initiate MNP.

Initiate V.80 Synchronous Access Mode when connection is completed, and Date State is entered..

<orig_fbk> : Specifies the acceptable fallback mode of operation when the modem is operating as the original

LAPM, MNP, or Normal Mode error control optional. (default)

LAPM or MNP error control required; disconnect if error control is not established.

LAPM error control required; disconnect if error control is not established.

MNP error control required; disconnect if error control is not established.

<ans_fbk> : Specifies the acceptable fallback mode of operation when the modem is operating as the answer or specifies V.80 Synchronous Access Mode.

1 Error control disabled, use Normal Mode

LAPM, MNP, or Normal Mode error control optional. (default)

LAPM or MNP error control required; disconnect if error control is not established.

LAPM error control required; disconnect if error control is not established.

MNP error control required; disconnect if error control is not established.

Initiate V.80 Synchronous Access Mode when connection is completed, and Date State is entered..

+IFC DTE-Modem local Flow Control (XON/XOFF)

Syntax

+IFC=< modem_by_DTE >,< DTE_by_modem >

Defined Values

< modem_by_DTE > : Specifies the method to be used by the DTE to control the flow of received data from the modem.

none

1 XON/XOFF on transmitted data ;don't pass XON/XOFF characters to the remote modem

CTS/RTS (default)

XON/XOFF on transmitted data with XON/XOFF characters being passed through to the remote modem in addition to being acted upon for local flow control

< DTE_by_modem > : Specifies the method to be used by the modem to control the flow of transmitted data from the DTE

none

1 XON/XOFF on received data.

CTS/RTS (default)

+MR Modulation Reporting control

This extended-format compound parameter controls whether or not the extended format +MCR:<carrier> and +MRR<rate> intermediate result codes are transmitted from the modem to the DTE after finish connecting.

Syntax

+MR=<value>

Defined Values

<value>

0 : Disables reporting of modulation connection (+MRC: and +MRR: are not transmitted ).

1 : Enables reporting of modulation connection (+MRC: and +MRR: are transmitted ). (default) The connecting report syntax is as following:

+MCR: <carrier>

+MRR: <tx_rate>,<rx_rate>

For example :

+MCR: V34

+MRR: 33600,56000

CONNECT 115200

Command : +MR?

Response : +MR: <current value>

For example :, +MR: 1

Command : +MR=?

Response : +MR: <value range>,<

For example :, +MR: (0,1)

+MS Modulation Selection

This extended-format compound parameter controls the manner of operation of modulation capabilities in the modem. The command format is:

Syntax

+MS=[<carrier>,[<automode>,[<min_tx_rate>,[<max_tx_rate>,[<min_rx_rate>,[<max_rx_rate>]]]]]]<CR>

Defined Values

<carrier> : Specifies the preferred modem carrier in originating or answering a connection.

Possible Rates (bps)

B103 : For Bell 103 (300)

B212 : For Bell 212 (1200)

V21 : For V.21 (300)

V22 : For V.22 (1200)

V22B : For V.22bis (2400,1200)

V23C : For V.23 (1200)

V32 : For V.32 (9600,4800)

V32B : For V.32bis (14400,12000,9600,7200,4800)

V34 : For V.34 (33600, 31200, 28800, 26400, 24000, 21600, 19200, 16800, 14400, 12000, 9600, 7200, 4800, 2400)

K56FLEX : For K56flex (56000, 54000, 52000, 50000, 48000, 46000, 44000, 42000, 40000, 38000, 36000, 34000, 32000)(default)

V90 : For V90 (56000,54667,53333,52000,50667,49333,48000,

46667,45333,42667,41333,40000,38667,37333,

36000,34667,33333,32000,30667,29333,28000)

<automode> : Enable or disable automatic modulation negotiation using V.8 or V.32 bis Annex A.

: Automode disabled

1 : Automode enabled, with V.8 bis/V.8 or V.32bis Annex.(default)

For <automode> = 0

a. If <max_rate> is within the rates supported by the selected modulation, the selected rated is that specified by <max_rate>. For example:

+MS=V32B, 0, 1200, 4800 selects V.32 bis 4800 bps fixed rate.

b. If <max_rate> is greater than the highest speed supported by the modulation specified by <mod>, the starting rate is the highest rate supported by the selected modulation. For example,

+MS=V32B, 0, 2400, 28800 selects V.32 bis 14400, 12000, 9600, 7200, or 4800 bps.

For <automode> = 1

a. If <max_rate> is greater than the highest rate supported by the modulation specified by <mod>, the modem automodes down from the highest rate of the selected modulation. For example:

+MS=V32B, 1, 1200, 24000 selects automoding down from V.32 bis 14400 bps.

b. The modem connects at the highest possible rate in accordance with V.8 bis/ V.8, or v32 bis Annex A if V.8 bis / V.8 is not supported by the remote modem. For example:

<min_tx_rate> : Optional numeric values which specify the lowest rate at which the modem may establish a connection. Values for this parameter are decimal encoded, in units of bps. The value range is 75-33600.(Default = Lowest rate supported by the selected carrier.)

<max_tx_rate> : Optional numeric values which specify the highest rate at which the modem may establish a connection. Values for this parameter are decimal encoded, in units of bps. The value range is 75-33600.(Default = Highest rate supported by the selected carrier.)

<min_rx_rate> : Optional numeric values which specify the lowest rate at which the modem may establish a connection. Values for this parameter are decimal encoded, in units of bps. The value range is 75-56000.(Default = Lowest rate supported by the selected carrier.)

<max_rx_rate> : Optional numeric values which specify the highest rate at which the modem may establish a connection. Values for this parameter are decimal encoded, in units of bps. The value range is 75-56000.(Default = Highest rate supported by the selected carrier.)

Reporting Supported Options

The modem can send a string of information to the DTE consisting of supported options.

Command :

+MS?

Response :

+MS : <carrier>,<automode>,<min_tx_rate>,<max_tx_rate>,<min_rx_rate>,<max_rx_rate>

For example :,

+MS : K56,1,75,33600,75,56000

Command :

+MS=?

Response :

+MS : <carrier>,<automode>,<min_tx_rate>,<max_tx_rate>,<min_rx_rate>,<max_rx_rate>

For example :,

+MS : <B103,B212,V21,V22,V22B,V23C,V32,V32B,V34,K56,V90>,<0,1>,<750-33600>,

<75-33600>,<75-56000>,<75-56000>

Making connections to PCM servers

+MS = -V90 = PCM Server Resulting Connection

V90 1 K56flex K56flex

V90 1 V.90 only V90

V90 1 Dual V90

K56 1 K56flex K56flex

K56 1 V.90 only V.90

K56 1 Dual K56flex

V90* 0 K56flex K56flex

V90* 0 V.90 only V34

V90* 0 Dual K56flex

K56 0 K56flex K56flex

K56 0 V.90 only V.34

K56 0 Dual K56flex

* Modem responds ERROR to this command and only supports K56flex mode.

2.3 Dial Modifiers

This section describes all of the dial modifiers which are used in dial strings.

Answer

', placed after a phone number, this modifier tells the modem to wait for 5 seconds of silence before dialing the next number in the dial string. @ is usually used to access a secure computer system that provides a silent answer as permission for further entrance.

Pause

',', placed anywhere in the dial string, tells the modem to pause for the number of seconds specified by S-register S8 before processing the rest of the dial string.

Initiate a Hookflash

'!', placed anywhere in the dial string, tells the modem to initiate a hookflash, which means to hang up for 0.5 seconds and then go off-hook again before processing the rest of the dial string. This modifier allows access to PBX features like call transferring .

Return to Command State after Dialing

';', which must be placed at the end of the dial string, returns to the command state after dialing the number placed ahead of it. A long telephone number would overflowthe 40 character command buffer if placed all in one command line, so it must be broken into two or more command lines. Each part includes part of the number, and all but the last command line end with the ';' followed by a carriage return.

^ Tone Control

Toggles calling tone enable/disable:applicable to current dial attempt only.

L Re-dial Last Number

The modem will re-dial the last valid telephone number. The L must be immediately after the D with all the following characters ignored.

P Pulse Dialing

P, placed ahead of a number, tells the modem to dial a number using pulse dialing.

T Touchtone Dialing

T, placed ahead of a number, tells the modem to dial a number using touchtone dialing.

W Wait for Dialtone

W, placed after a number, tells the modem to wait up to 30 seconds to detect a one-second continuous dialtone before dialing the next number. W is most often used in a PBX system to wait for the dialtone of an outside telephone line.

( ) Ignored

Ignored

<space> Ignored

Commands Not Preceded By AT

Two commands, A/ and +++, are neither preceded by the attention code AT nor followed by a carriage return.

A/ Repeat Command

A/ repeats the execution of the last command line stored in the command buffer. If the last command line is invalid, the ERROR result code will appear on the screen. Note that A/ cannot be preceded by AT; if it is, ERROR will appear on the screen.

+++ Escape

+++ returns to the on-line command state (command state without breaking the established connection) from the on-line state.

When the modem has established a connection and has entered on-line data mode, it is possible to break into the data transmission in order to issue further commands to the modem in an on-line command mode. This is achieved by the DTE sending to the modem a sequence of three ASCII characters specified by register S2. The default character is '+'. The maximum time allowed between receipt of the last character of the three escape character sequence from the DTE and sending of OK result code to the DTE is controlled by the S12 register.

Result Codes

The modem sends a response to the user via the screen after a command is issued. As shown in the figure below, there are two forms for each result code: Modem Response code and digit code.

Modem Response Digit Description

OK 0 Command executed without errors

CONNECT 1 Connect to another modem

RING 2 Detect an incoming ring

NO CARRIER 3 Carrier lost or never detected

ERROR 4 Invalid command or invalid character

CONNECT 1200 5 Connection established at 1200 bps

NO DIALTONE 6 Dial tone not detected within time-out

BUSY 7 Detected a busy tone after dialing

NO ANSWER 8 No ring-back or quiet answer was detected by the modem

CONNECT 600 9 Connection established at 600 bps

CONNECT 2400 10 Connection established at 2400 bps

CONNECT 4800 11 Connection established at 4800 bps

CONNECT 9600 12 Connection established at 9600 bps

CONNECT 7200 13 Connection established at 7200 bps

CONNECT 12000 14 Connection established at 12000 bps

CONNECT 14400 15 Connection established at 14400 bps

CONNECT 19200 16 Connection established at 19200 bps

CONNECT 38400 17 Connection established at 38400 bps

CONNECT 57600 18 Connection established at 57600 bps

CONNECT 115200 19 Connection established at 115200 bps

CONNECT 230400 20 Connection established at 230400 bps

CONNECT 1200RX/75TX 22 V.23 connection established : transmit at 75 bps, receive at 1200 bps

CONNECT 75RX/1200TX 23 V.23 connection : transmit at 1200 bps, receive at 75 bps

DELAYED 24 Call fails to connect and number dialed is considered 'delayed' due to country blacklisting requirements

BLACKLISTED 32 Call fails to connect and the number dialed is considered 'blacklisted'

FAX 33 A fax modem connection is established in a facsimile mode

DATA 35 A data modem connection is established in a facsimile mode

+FCERROR +F4 High speed fax data ( V.27, V.29, V.33, V.17) is expected and a V.21 signal is received

3 - S REGISTER REFERENCE

Your modem has status registers. These registers are memory locations inside your modem which control your modem operation. You usually do not have to worry about setting any register because the default values work for most applications.

The factory default values are stored in Product Configuration File and are loaded into the active configuration at power up or by the Z command. In addition, the default profile is subsequently loaded, and may change some of the factory default value. The S registers are summarized in Fig. 3-1, along with their default values.

Register Summary

The following chart summarizes your modem? registers:

Default

Reg.# Range Unit Dec Hex Description

S0 0 - 255 rings 0 00h Number of rings before autoanswer.

S1 0 - 255 rings 0 00h Ring counter.

S2 0 - 255 ASCII 43 2Bh Escape character code.

S3 0 - 127 ASCII 13 0Dh Command terminator (<CR>character).

S4 0 - 127 ASCII 10 0Ah Line feed character.

S5 0 - 255 ASCII 8 08h Backspace character.

S6 2 - 255 seconds 2 02h Wait time for blind dialing.

S7 1 - 255 seconds 50* 32h Wait time for carrier after dial.

S8 0 - 255 seconds 2* 02h Pause time for comma (dial delay).

S10 1 - 255 1/10 sec. 14* 0Eh Lost carrier to hang-up delay.

S11 50 - 255 1/1000 sec. 95 5Fh DTMF Tone Duration.

S12 0 - 255 1/50 sec. 50* 32h Escape code timing.

S29 0 - 255 10 ms 70* 00h Flash Dial Modifier Time.

S95  [Bit mapped] 0* 00h Extended result codes.

Fig. 3-1 S-Register Summary

Glossary of the S Registers

S0 Number of Rings Before Auto Answer

S0 determines the number of rings that must be received before the modem automatically answers an incoming call. For example, when S0=3, the modem automatically answers after the third ring. When S0=0, the modem does not automatically answer an incoming call; it stays on-hook until the A command is issued manually to answer the incoming call.

Range: 0 - 255 rings

Default: 0

S1 Ring Counter

S1 automatically increments its value by one each time the modem receives a ring while in the command state. S1 is reset to zero if no ring is detected within 8 seconds.

Range: 0 - 255 rings

Default: 0

S2 Escape Character

S2 stores the ASCII value of the escape character. Setting register S2 to a value greater than 127 disables the escape command and you cannot return to the command state. With escape disabled, in the on-line state the modem cannot hang up until the power is turned off or the remote modem hangs up.

Range: 0 - 255, ASCII decimal.

Default: 43 ( + )

S3 Line Termination Character

S3 sets the decimal value of the command line and result code terminator character. Pertains to asynchronous operation only.

Range: 0 - 127, ASCII decimal.

Default: 13 ( Carriage Return )

S4 Response Formatting Character

S4 sets the decimal value of the character generated by the modem as part of the header, trailer, and terminator for result codes and information text, along with the S3 parameter. If the value of S4 is changed in a command line, the result codes issued in response to that command line will use the new value of S4. The Response Formatting character is output after the Line Termination character if verbose result codes are used.

Range: 0 - 127, ASCII decimal.

Default: 10 ( Line Feed )

S5 Command Line Editing Character

S5 sets the decimal value of the character recognized by the modem as request to delete from the command line the immediately preceding character. This character can be use to edit a command line. When the echo command is enabled, the modem echoes back to the local DTE the Command Line Editing character, an ASCII space character and a second Command line Editing character; this means a total of three characters are transmitted each time the modem processes the Command Line Editing character.

Range: 0 - 32, ASCII decimal.

Default: 8 ( Backspace )

S6 Wait Time for Dial Tone before Blind Dialing

S6 controls how long the modem waits after it goes off-hook before it dials the first digit of the telephone number. The modem always pauses for at least 2 seconds, even if S6 is set to less than two seconds.

Range: 2 - 255 seconds.

Default: 2

S7 Wait for Carrier after Dial

S7 controls how long the modem waits for a carrier signal from a remote modem after originating a call or from the calling modem after going off-hook when answering a call.

S7 also controls how long the modem waits for a one-second continuous dial tone after dialing a number followed by the W dial modifier. If the modem detects a one-second continuous dial tone within the specified wait time, it proceeds to dial.

Range: 1 - 255 seconds.

Default: 50

S8 Pause Time for Dial Delay

S8 controls how long the modem pauses when a comma ', ' is encountered in a dial string while executing a dial command.

Range: 0 - 255 seconds.

Default: 2

S10 Delay between Loss of Carrier and Hang Up

S10 determines the delay time between the loss of a carrier from the remote modem and hang-up. This allows for a temporary loss of carrier without causing the local modem to disconnect. When S10 is set to 255, the modem functions as if a carrier is always present.

The actual interval the modem waits before disconnecting is the value in S10 minus the value in S9. Therefore, the value in S10 must be greater than that in S9, or else the modem disconnects before it recognizes the carrier.

Range: 1 - 255 tenths of a second.

Default: 14 (1.4 seconds)

S11 DTMF (Touch-tone) Tone Duration

S11 determines the duration and spacing of tones for Dual Tone Multifrequency (DTMF) dialing. This value has no effect on pulse dialing.

Range: 50 - 255 milliseconds.

Default: 95

S12 Escape Prompt Delay ( EPD )

S12 defines the maximum period, in fiftieths of a second, allowed between receipt of the last character of the three escape character sequence from the DTE and sending of the OK result code to the DTE. If any character are detected during this time, the OK will not be sent . Note that sending of the OK result code does not affect entry into command mode

Range: 0 - 255 1/50 of a second.

Default: 50 (1 second)

S29 Flash Dial Modifier Time

Range: 0 - 255 tenths of a second

Default: 70 (disable)

S95 Extended Result Codes

This register can override some of the &W command options. Set the appropriate bit to 1 to enable the corresponding result code, regardless of the &W command setting Set the bit to 0 to disable the result code.

Bit Description

0 CONNECT indicates DCE speed.

1 Append /ARQ to the CONNECT result code if the protocol is other than NONE.

2 CARRIER result code.

3 PROTOCOL: result code.

4 Reserved.

5 COMPRESSION: result code.

6 Reserved.

7 Reserved.

4 - TROUBLESHOOTING GUIDE

This chapter describes common problems in the installation, configuration and regular usage of your Fax/Data Modem. To test the Fax/Data Modem, a communication software package is needed and the package must include a mode that allows you to operate your Fax/Data Modem by directly issuing internal commands to the modem.

Follow the procedures in the following sections to resolve these common problems:

No Response From Your Modem

1. If you are using the internal add-on card modems, make sure that the COM port address you have set your modem to corresponds to the appropriate selection in the communications software which you are using.

2. Issue the ATZ command to reset your modem. The returned result code should be '0' or 'K' depending on what communications program you are using. Your modem is OK if you get one of these responses. If there is no response after issuing the ATZ<CR>, continue to the next step.

3. Check if there are any other interface cards in your computer that use the same COM port address as your modem. If so, you must set your modem to another COM port address.

4. Issue the command: AT&F&W <CR>, if a '0' or 'K' result code is displayed on the screen, your modem is OK. Otherwise, contact your dealer for assistance.

Your Modem Does Not Connect After It Has Dialed a Phone Number

The problem may have several causes. The phone line may be too noisy or the telephone cord may be poor. Try the line with a regular phone. Also the remote modem may not recognize your modem baud rate.

Your Can Transmit After You Have Connected to the Remote Modem

In this case, check the communication parameters of the remote modem, then configure your software to the same number of data bits, stop bit, and parity.

5 - APPLICATION EXAMPLES

5.1 Dialing a Remote Modem

Command line: ATDP9WT002, (886)-7128423<CR>

This command line instruct the modem to dial a remote modem through a PBX. The modem first use pulse dialing to dial 9 (the access code of the PBX), wait for outside dial tone, and then use touch tone dialing to dial 002 once a one-second continuous dial tone is detected within 30 seconds, pause for 2 seconds (if S8=2) and then dial 8867128423.

Manual Answer an Incoming Call

Command line: ATA <CR>

The factory setting of the S-register S0 is S0=0. This condition disables the auto answer capability so that you must issue an ATA command to answer a call. At power up, your modem always monitors if there are incoming rings. If incoming rings are detected, your modem will display result codes on the screen as :

RING

RING

Seeing that, you may issue the ATA command to answer the call. This command must be entered within the quiet interval between any two rings.

5.3 Auto Answer an Incoming Call

Command line: AT S0=2 <CR>

Auto answer can be enabled by changing the setting of the S-register S0 to a value between 1 and 255. In the above command line, S0=2 instructs the modem to answer an incoming call automatically after the 2nd ring.

This example also shows the insertion of space between two neighboring commands to make the command line more readable.

A - CALLER ID & DSVD COMMANDS

+VCID ( Option ) Caller ID (Enables or disables Caller ID.)

This command only apply to models which support the Caller ID function.

+VCID=0 Disables Caller ID.(Default.)

+VCID=1 Enables Caller ID with formatted presentation to the DTE. The modem will present the data items in a <Tag><Value> pair format. The expected pairs are data, time, caller code (telephone number), and name.

Inquiries :

+VCID? Reporting Current or Selected Values.

+VCID=? Reporting Supported Range of Parameter Values.

Formatted Form Reporting

The modem presents the data in the <tag>=<value> pair format as described in the table below. Spaces are present on both sides of the equal sign.

TAG Description

DATE DATE=MMDD where MM is the month number(01 to 12) and DD is the day number (01..31).

TIME TIME=HHMM where HH is the hour number (00 to 23) and MM is the minute number (00 to 59).

NMBR NMBR=<number> or P or O where <number> is the telephone number of the caller,where P indicates that the calling number information is not available since the originating caller has requested private service, and where O indicates that the calling number information is not available or out of service at the calling location.

NAME NAME=<listing name> where <listing name> is the subscription name.

MESG MESG=<data tag><length of message><data><checksum> in printable ASII hex numbers. This tag indicates a data item not listed above. The message is only possible for Multiple Message Format.

Notes:

1. The modem does not present any Caller ID information if the DCE detects a checksum error in the Caller ID packet.

2. In the event of an unrecognized data tag, the modem will present the data in ASCII hex numbers following the MESG tag.

Example of Formatted Form Reporting

1. The following example illustrates the standard Caller ID message packet.

RING

DATE = 0321

TIME = 1405

NMBR = 504551234

NAME = A N OTHER

RING

RING

2. The following example illustrates the case where the tag of the packet is not recognized by the modem.

RING

MESG = 06034242431

RING

RING

Unformatted Form Reporting

The modem presents all information and packet control information found in the message. The modem, however, excludes the leading U(channel seizure information) from the presentation. The packet is presented in ASCII printable hex numbers, the modem does not insert spaces, or line feeds, for formatting between bytes or words of the packet. The modem does not detect the checksum of the packet.

Example of Unformatted From Reporting

RING

0412303332323234303539313435353132333435

RING

RING

-SSE ( Option ) Enable/Disable DSVD

Syntax

-SSE=[<value>]

Defined Values

<value>

0 : Disable DSVD. ( Default )

1 : Enable DSVD.

B - TECHNICAL SPECIFICATIONS

B.1 Features

Data Rates(bps)

300, 1200, 2400, 4800, 7200, 9600, 12000, 14400, 19200,

21600, 24000, 26400, 28800, 31200, 32000, 33600, 34000,

36000, 38000, 40000, 42000, 44000, 46000, 48000, 50000,

52000, 54000, 56000

54667,53333,50667,49333,46667,45333,42667,41333,

38667,37333,34667,33333,30667,29333.

Compatibility

(Data) ITU-T V.34, V.32 bis, V.32, V.22 bis, V.23, V.22, and V.21

Bell: 212A and 103, Rockwell V.Fast Class, K56flex, V.90

(Fax) ITU-T V.17, V.29, V.27 ter, and V.21 ch 2

Command Set Enhanced 'AT' command set, Fax Class 1 & Class 2 command

Flow Control Xon/Xoff, Hardware RTS/CTS

Data Compression V.42bis, MNP5

Error Correction V.42, MNP 2-4

Modulation

Data 56000, 54000, 52000, 50000, PCM

40000, 38000, 36000, 34000,

32000, 54667, 53333, 50667,

33333, 30667, 29333bps

TCM

24000, 21600, 19200, 16800,

14400, 9600, 7200bps

9600, 4800bps QAM

2400, 1200, 600bps DPSK

1200Tx/75Rx, 75Tx/1200Rx, FSK

300bps

Fax 14400, 9600, 7200, 4800bps QAM

4800, 2400bp DPSK

Operation Full-or Half-duplex 28800 bps with 26400, 24000, 21600, 19200, 14400, 9600, 4800, 2400 and 1200 bps auto fallback

Audio Monitor Built-in speaker, with software-controllable volume control

Guard Tone 1800 Hz

Compatibility:

Data V90  56000/54667/53333/52000/50667/49333/48000,

36000/34667/33333/32000/30667/29333/28000 bps.

K56flex 56000/54000/52000/50000/48000/46000/44000/42000

/40000/38000/36000/34000/32000 bps

V.34 33600/31200/28800/26400/24000/21600/19200/16800/14400

ITU-T V.32bis 14400/9600 bps, asynchronous, synchronous

ITU-T V.32 9600/4800 bps, asynchronous, synchronous

ITU-T V.22 bis 2400/1200 bps, asynchronous, synchronous

ITU-T V.23 1200/75 bps, asynchronous, synchronous

ITU-T V.22 1200 bps, asynchronous, synchronous

ITU-T V.21 300 bps, asynchronous

Bell 212A 1200 bps, asynchronous, synchronous

Bell 103 300 bps, asynchronous

Fax ITU-T V.17 14400/9600 bps, half-duplex

ITU-T V.29 9600/7200 bps, half-duplex

ITU-T V.27 ter 4800/2400 bps, half-duplex

ITU-T V.26 A 2400, half-duplex

G - III (Group 3 fax)

Compliance FCC Part 15 & Part 68

Transmit Level -15(+/-2)dBm

Receive Sensitivity -38dBm

Pulse Dialing Specifications

USA

Make/Break Ratio 39/61

Break Length 61ms

Dial Pulse Length 100m

Dial Pulse Rate 10pps

Interdigit Time >600ms

C - QUICK REFERENCE

A Go On-line in Answer Mode

D Go On-line in Originate Mode

En Command Echo

Hn Hang Up

In Identification

Ln Control Speaker Volume

Mn Monitor Speaker On/Off

On Return to On-line Data Mode

P Set Pulse Dial as Default

Q Result Code Display

Sn Reading and Writing to S Registers

T Set Tone Dial as Default

Vn Select Word or Digit Result Codes

Xn Extended Result Codes

Z Reset

&Cn RLSD Options

&Dn DTR Option

&F Fetch Factory Configuration

&Gn Set Guard Tone

&Pn Select Pulse Dialing Make/Break Ratio

&V View Configuration Profiles

&W Store the Current Configuration to Nonvolatile RAM

%En Enable/Disable Line Quality Monitor and Auto-Retrain or Fallback/Fall Forward

%L Report Received Signal Level ( Option )

%Q Line Signal Quality ( Option )

+DR Data Compression Report.

+DS Data Compression.

+EB Break Handling in Error Control Operation.

+ER Error Control Report.

+ES Error Control and Synchronous Mode Selection.

+IFC DTE-Modem local Flow Control(XON/XOFF).

+MR Modulation Report Control

+MS Select Modulation

+VCID Caller ID (Enables or disables Caller ID.) ( Option )

-SSE Enable/Disable DSVD ( Option )

Wait for silence

Pause

Initiate a Hookflash

Return to Command State after Dialing

Tone Control

L Re-dial Last Number

P Pulse Dialing

T Touchtone Dialing

W Wait for Dialtone

A/ Repeat Command

Escape

D - GLOSSARY

ASCII - An acronym for American Standard Code for Information Exchange. ASCII is a seven-bit code which defines 128 standard characters, including control characters, letters, numbers, and symbols. An extra 128 characters comprise the extended ASCII set.

Baud Rate - The transmission rate between two serial devices, e.g., modems, fax machines, etc. Measured in Bits Per Second.

Blind Dialing - In blind dialing, the modem continues to dial, regardless of the existence of a dialtone, ring, or busy signal.

BPS - Bits Per Second; the number of bits that can be transmitted in one second.

Carrier Signal - The analog data signal that a modem sends over telephphone wires.

COMx - Where (x = 1, 2, 3, or 4), COMx is the name(address) of serial communications ports on personal computers. Each serial port in a personal computer has a different number.

CTS - Clear To Send.

Default - The assumed value that is used for a command parameter when

no other value is explicitly provided.

DCD - Data Carrier Detect.

DCE - Data Communication Equipment.

DTE - Data Terminal Equipment.

DTMF - Dual Tone Multifrequency(for touchtone dialing).

DTR - Data Terminal Ready.

FSK - Frequency Shift Keying.

Make/Break Ratio - The ratio of the off-hook (make) to on-hook (break) interval is the make/break ratio in pulse dialing.

Modem - A combination of the words MOdulator and DEModulator. Modems transform digital data into analog signals and back again.

Nonvolatile Memory - An area of memory inside the modem where the default configuration profile is stored. Values recorded in this memory will not be lost when the power is turned off.

Off-Hook - The condition when the modem has picked up the telephone line.

Off-Line Command State - A modem state in which the modem accepts, interprets and executes commands from an asynchronous computer or terminal.

On-Hook - The condition when the modem has not picked up the telephone line; the telephone is hung up.

On-Line - A carrier signal link with a remote modem has been established; communication is in progress.

On-Line State - A modem state in which the modem is connected with a remote modem. Data can be sent or received from the remote modem in this state. No commands will be accepted from the modem except the escape command which will bring the modem into the on-line command state.

On-Line Command State - A modem state in which the modem can accept or execute commands from an asynchronous computer or terminal while remaining connected with the remote modem. The user can return the modem to the on-line state by issuing the AT0n command or put it into the off-line command state by issuing command such as ATZ or ATH.

Parity - An error-checking method by which the modem verifies that the data just sent is correct.

pps - Pulse per second.

Profile - A list of default settings.

Protocol - A technical specification for serial communications.

PSK - Phase Shift Keying.

Pulse Dialing - A dialing form in which each digit is represented by a series of pulses. Rotary telephones all use pulse dialing.

QAM - Quadrature Amplitude Modulation.

Result Codes - The response the modem returns to the screen upon executing a command.

RTS - Request To Send.

RX - Reception.

S Register - RAM locations in the modem which store the active configuration.

Serial Port - See COMx.

TCM - Trellis-Coded Modulation.

Touchtone Dialing - A dialing format in which each digit is represented by a musical frequency.

TX - Transmission.

E - ASCII CODE TABLE

Decimal Hex Value Decimal Hex Value Decimal Hex Value Decimal Hex Value

000 00 NUL 032 20 (space)064 40 @ 096 60 '

001 01 SOH 033 21 ! 065 41 A 097 61 a

002 02 STX 034 22 ' 066 42 B 098 62 b

003 03 ETX 035 23 # 067 43 C 099 63 c

004 04 EOT 036 24 $ 068 44 D 100 64 d

005 05 ENQ 037 25 % 069 45 E 101 65 e

006 06 ACK 038 26 & 070 46 F 102 66 f

007 07 BEL 039 27 ' 071 47 G 103 67 g

008 08 BS 040 28 ( 072 48 H 104 68 h

009 09 HT 041 29 ) 073 49 I 105 69 i

010 0A LF 042 2A * 074 4A J 106 6A j

011 0B VT 043 2B + 075 4B K 107 6B k

012 0C FF 044 2C , 076 4C L 108 6C l

013 0D CR 045 2D - 077 4D M 109 6D m

014 0E SO 046 2E . 078 4E N 110 6E n

015 0F SI 047 2F / 079 4F O 111 6F o

016 10 DLE 048 30 0 080 50 P 112 70 p

017 11 DC1 049 31 1 081 51 Q 113 71 q

018 12 DC2 050 32 2 082 52 R 114 72 r

019 13 DC3 051 33 3 083 53 S 115 73 s

020 14 DC4 052 34 4 084 54 T 116 74 t

021 15 NAK 053 35 5 085 55 U 117 75 u

022 16 SYN 054 36 6 086 56 V 118 76 v

023 17 ETB 055 37 7 087 57 W 119 77 w

024 18 CAN 056 38 8 088 58 X 120 78 x

025 19 EM 057 39 9 089 59 Y 121 79 y

026 1A SUB 058 3A : 090 5A Z 122 7A z

027 1B ESC 059 3B ; 091 5B [ 123 7B

030 1E RS 062 3E > 094 5E ^ 126 7E ~

031 1F US 063 3F ? 095 5F _ 127 7F DEL

'This equipment has been approved to [Council Decision 98/482/EC - 'CTR 21'] for pan-European single terminal connection to the Public Switched telephone Network (PSTN). However, due to differences between the individual PSTNs provided in different countries, the approval does not, of itself, give an unconditional assurance of successful operation on every PSTN termination point.

In the event of problems, you sholud contact your equipment supplier in the first instance'