Askey Computer 1456VQH75A Users manual

FAX/MODEM CARD

FCC ID:H8N1456VQH75A

USER'S MANUAL

Table of Contents

i - FCC/DOC REQUIREMENTS

i.1 FCC General Information
i.2 FCC Notice
i.3 DOC Notice

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 Proceeded by %

2.2.d Commands Preceded by +

2.2.e 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 - TESTING

4.1 Local Analog Loopback

4.2 Local Analog Loopback with Self-Test

5 - TROUBLESHOOTING GUIDE

6 - APPLICATION EXAMPLES

6.1 Dialing a Remote Modem

6.2 Dial a Stored Number

6.3 Manual Answer an Incoming Call

6.4 Auto Answer an Incoming Call

6.5 Voice to Data Switching

A - MNP 10 COMMANDS

B - CALLER ID COMMANDS

C - TECHNICAL SPECIFICATIONS

D - QUICK REFERENCE

E - GLOSSARY

F - ASCII CODE TABLE

i - FCC/DOC REQUIREMENTS
i -1 FCC General Information

The Federal Communications Commission (FCC) of the United States restricts specific uses of modems,
and places registration responsibilities on both the manufacturer and the individual user:

1. The modem may not be connected to a party line or to a coin operated telephone.

2. The modem manufacturer must make any repairs to the modem to maintain valid FCC registration.

3. Notification to the telephone company is no longer required prior to connecting registered equipment,
but upon request from the telephone company, the user shall tell the telephone company which line the
equipment is connected to as well as the registration number and ringer equivalence number of the
registered protective circuitry. FCC information is printed on a label on the bottom of the modem.

i - 2 FCC Notice

NOTE
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to
Part 15 of the FCC Rules. These limits are designed to provide reasonable protection. This equipment
generates, uses and can radiated radio frequency energy and, if not installed and used in accordance with the
instructions, may cause harmful interference to radio communications. However, there is no guarantee that
interference will not occur in a particular installation If this equipment does cause harmful interference to
radio or television reception, which can be determined by turning the equipment off and on, the user is
encouraged to try to correct the interference by one or more of the following measures:

-Reorient or relocate the receiving antenna.

-Increase the separation between the equipment and receiver.

-Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.

-Consult the dealer or an experienced radio/TV technician for help.

Changes or modifications not expressly approved by the party responsible for compliance could void the
user‘s authority to operate the equipment.

i - 3 DOC Notice

Notice: The Canadian Department of Communications label identifies certified equipment. This
certification means that the equipment meets certain telecommunications network protective, operational
and safety requirements. The Department does not guarantee the equipment will operate to the user's
satisfaction.

Before installing this equipment, users should ensure that it is permissible to be connected to the facilities of
the local Telecommunications Company. The equipment must also be installed using an acceptable method
of connection. In some cases, the companies inside wiring associated with a single line individual service
may be extended by means of a certified connector assembly (telephone extension cord). The customer
should be aware that compliance with the above conditions might not prevent degradation of service in
some situations.

Repairs to certified equipment should be made by an authorized Canadian maintenance facility designated
by the supplier. Any repairs or alterations made by the user to this equipment, or equipment malfunctions,
may give the telecommunications company cause to request the user to disconnect the equipment.

Users should ensure for their own protection that the electrical ground connections of the power utility,
telephone lines and internal metallic water pipe system, if present, are connected together. This precaution
may be particularly important in rural areas.

Caution: Users should not attempt to make such connections themselves, but should contact the appropriate
electric inspection authority, or electrician, as appropriate.

The Load Number (LN) assigned to each terminal device denotes the percentage or the total load to be
connected to a telephone loop which is used by the device, to prevent overloading. The termination on a
loop may consist of any combination of devices subject only to the requirement that the total of the Load
Numbers of all the devices does not exceed 100.

Note: Locate an analog telephone line. Many offices have digital telephone lines, which will not
work with a modem.

Warning: Do not connect your modem to a digital telephone line. Modems are designed for use only

with analog telephone lines; connecting to a digital telephone line may damage the modem.
Verify that the line is analog before connecting.

Fax machines use analog telephone lines. If you can't find an analog voice line, find a fax machine

and use its line.

1 - INTRODUCTION

Congratulations on your purchase of this out s t anding Fax/Data Mod em. This manual describe s 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's
(Bulletin Bo ard Systems) through the data mod em 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 (ANNEX 12), V.32bis, V.32, V.22bis, V.23, V.22, V.21,
MNP 2-5, Bell 103, 212A, K56flex and/or V.90. When used as a Fax/Data 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 begi n 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 ki nd of machine that you are go i ng 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.

Note: 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.

All the description in this manual about Caller ID, V.90 and Fax class 2 applies only to the models
which support these functions.

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 t he communications software
package you will be using lets you operate the mod em through its internal commands. If your software
permits use of the modem's internal commands, read this chapter. If not, read your software user's manual
and ignore the rest of this manual.

2-1 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: "AT
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
B0/B, issuing either B0 or B will have the same effect.

2-2 AT Commands

A Go On-line in Answer Mode

This command instruc t s 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.

Bn Select Protocol to 300 bps or 1200 bps

B0/B Selects ITU-T 300 or ITU-T 1200 protocol once the command line pref i x AT has been

entered at the 300 bps or 1200 bps data rate.

B1 Selects BELL 300 or BELL 212A protocol once the comm and l i ne prefix AT has been

entered at the 300 or 1200 bps data rate. (Defaul t)

Cn Carrier Transmit Control

Controls the transmit carrier. The modem is preset to turn carrier on and off as necessary (the C1 option).
The signal is on when the modem is calling, or connected to a remote modem, and is off when it is not. The
C0 option is NOT valid.

C0 Not permitted; returns ERROR result code.
C1 Normal transmits carrier switching (preset).

D Go On-line in Originate Mode

D instructs the modem to go off-hook immediately and automatically dial the numbe r 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 Report the product code.
I1 Report the hardware checksum.
I2 Report " ERROR".
I3 Report firmware revision.
I4 Report OEM defined identifier st ri ng.
I5 Report the country code paramet er.
I6 Report modem data pum p model and internal code revision.

I7 Report the DAA code.

Ln Control Speaker Volume

L0/L Low volume.

L1 Low volume. (Default)
L2 Medium volume.

L3 High volume.

Mn Monitor Speaker On/Off

M0/M Speaker is always off.
M1 Speak er i s off while receiving carrier. (Default)
M2 Speaker is always on.
M3 Speak er di sabled while dialing or receiving carrier.

Nn Automode Enable

N0 Automode detection is disabled.

N1 Automode detecti on i s enabled. This command is equi val ent to F0. (Default)

On Return to On-Line Data Mode

O0 Enters on-line data mode without a retrain. Handling is determined by the Call

Establishment task. Generally, if a connecti on exists, this comm and connects the DTE
back to the remote modem after an escape (+++).

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

P Set Pulse Dial as Default

Causes the modem to assume that all subsequent dial commands are pulse dials.
from the dial strings.

Q Result Code Display

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

Q0 Allows the modem to send result codes to the DTE.
Q1 Prohibits the modem from sendi ng result codes to the DTE.

Sn Reading and Writing to S Registers

Sn? Reads S Registers :
Read the contents of the S register speci fied by 'n'.

Sn=x Writing to Registers:
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;
these are: S1, S13-S15, S 20-S 24, and S27. (n=0-95, x=0-255)

You may omit the " P "

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)

Wn Connect Message Control

This command controls the format of CONNECT messages. The parameter value, if valid, is written to S31
bits 2 and 3. Note that the Wn command can be overridden by register S95 bits (see S95 description).

W0 Upon connection, the modem reports only the DTE s peed (e.g., CONNECT 19200).

W1 Upon connection, the modem reports the line speed, the error correction protocol, and

W2 Upon connection, the modem reports the DCE speed (e.g., CONNE CT 14400).

Subsequent responses are disabl ed. (Default)

the DTE speed, respectivel y. S ubsequent responses are disabled.

Subsequent responses are disabl ed.

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 or 2), the only message sent to indicate a connection is
CONNECT without a speed indication.

X0 Disables monitoring of busy tones unless forced otherwise by country requirements;

send only OK, CONNECT, RING, NO CA RRIER, ERROR, and NO ANSW ER result
codes. Blind dialing is enabled/disabled by country parameters. If busy tone detection is
enforced and busy tone is detected, NO CA RRIER will be reported. If dial tone detection
is enforced or selected and dial tone is not detected, NO CARRIER will be reported
instead of NO DIAL TONE. The value 000b i s written to S22 bits 6, 5, and 4,
respectively.

X1 Disables monitoring of busy tones unless forced otherwise by country requirements;

X2 Disables monitoring of busy tones unless forced otherwise by country requirements;

X3 Enables monitoring of busy tones; send only OK, CONNECT,

send only OK, CONNECT, RING, NO CA RRIER, ERROR, NO ANSW ER, and
CONNECT XXXX(XXXX=rate ). Blind dialin g is enabled/disabled by country parameters.
If busy tone detection is enf orced and busy tone is detected, NO CARRIER will be
reported instead of BUSY. If dial tone detection is enforced or selected and dial tone is
not elected, NO CARRIER will be reported instead of NO DI AL TONE. The value 100b is
written to S22 bits 6, 5, and 4, respectively.

send only OK, CONNECT, RING, NO CA RRIER, ERROR, NO DIAL TONE, NO
ANSWER, and CONNE CT XXXX. If b usy tone det ection is enforced and busy tone is
detected, NO CARRIER will be reported instead of BUSY. If dial tone detection is
enforced or selected and dial tone is not det ected, NO DIAL TONE will be reported
instead of NO CARRIER. The value 101b i s written to S22 bits 6, 5, and 4, res pectively.

RING, NO CARRIER, ERROR, NO ANSWER, and CONNECT
XXXX. Bl ind dialin g is enabled/disabled by country parameters. If di al tone detection is
enforced and dial tone is not detected, NO CA RRIER will be reported. The value 110b is
written to S22 bits 6, 5, and 4, respectively.

X4 Enables monitoring of busy tones; send all mess ages. The value 111b is written to S22

bits 6, 5, and 4, respectively. (Default)

Yn Enables or Disables Long Space Disconnect

Y0/Y Disables Long Space Disconnect. (Def aul t)

Y1 Enables Long Space Disconnect.

Zn Reset

Zn, which must be placed at the end of the command line, resets the active configuration of the modem to
the stored configuration saved in nonvolatile RAM, hangs up the modem, and clears the command buffer.

Z0/Z Resets the modem and loads stored configuration 0.
Z1 Resets the modem and l oads stored configuration 1.

2.2.a Commands Preceded by &

&Cn Select DCD Options

&C0/&C Maintains an ON stat us for the Data Carrier Detect (DCD).
&C1 Uses the actual stat e of the carrier from the remote modem for DCD. (Default)

&Dn DTR Option

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

&D0 DTR is ignored. Allows operation with DTEs that do not provide DTR.
&D1 DTR drop is interpreted by the modem as if the escape sequence has been entered. The

&D2 DTR drop causes the modem to hang up. Auto answer is inhibited. (Default)
&D3 DTR drop causes the modem to perform a soft reset as if the Z command were

modem returns to t he command state without disconnecting.

received.

&F Fetch Factory Configuration

&F0 Recall fac t ory profile 0. (Default)
&F1 Recall factory profile 1.

&Gn Set Guard Tone

&G0 - 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 send an 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 Disable DTE/DCE flow control.

&K3 Enable RTS/CTS DTE/DCE f l ow cont rol . (Default)
&K4 Enables XON/XOFF DTE/DCE flow control.
&K5 E nabl es transparent XON/XOFF DTE/DCE flow control.

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

&Mn Communication Mode

(Same as &Q0)

&Pn Select Pulse Dialing Make/Break Ratio

&P0/&P Sets a 39/61 make/break ratio @ 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.

&Qn Asynchronous Mode Selection

This command is an extension of the &M command and is used to control the connection modes permitted.
It is used in conjunction with S36 and S48.

&Q0 Sel ect direct asynchronous operation. The val ue 000b i s written to S27 bits 3, 1, and 0

&Q5 The modem will try to negotiate an error-corrected link. The m odem can be configured

&Q6 Sel ect asynchronous operation in normal mode (speed buffering). The value 110b is

respectively.

using S36 to determine whether a failure will result in the modem returning on-hook or
will result in fallback to an asynchronous connecti on. The value 101b is written t o S 27
bits 3, 1, and 0 respecti vel y. (Default)

written to S27 bits 3, 1, and 0 res pectively.

&Sn DSR Option

Determines whether DSR operates in accordance with the EIA-232-D specification or remains ON

&S0 DSR is always ON. (Default)
&S1 DSR will become active after answer tone has been detect ed and inactive after the carrier

has been lost.

&Tn Testing and Diagnostics (See Chapter 4)

Testing commands must be initiated in command mode (at the end of the command line) with asynchronous
operation in the Direct mode, selected (&Q0) at a speed of 1200 bps or faster. A telco connection must be
established prior to loopback tests. If these conditions are not met, an ERROR result code is issued. If a
local analog loopback is initiated while the modem is connected, the modem disconnects beforeperforming
the test. A test remains active for the period of time specified in register S18. If S18 is zero, the test aborts
when the user issues the &T0 command.

&T0/&T Terminates any test currently in progress.
&T1 Initiat es a local analog loopback in accordanc e with I T U-T V.54, L3; verifies the path

between the local DTE and the local m odem.

&T8 Initiates a local analog loopback with self-test i n accordance with ITU-T V.54, L2.

&V View Configuration Profiles

&V Displays the active c onfiguration profile.

&Wn Store the Current Configuration to Nonvolatile RAM

&W0 Writes the current act i ve configuration to profile 0 in nonvolatil e RA M.
&W1 Writes the current act i ve configuration to profile 1 in nonvolatil e RA M.

&Yn Select the Default Profile

&Y0/&Y Uses profile 0 on power-up. (Def aul t)

&Y1 Uses profile 1 on power-up.

&Zn Store Telephone Numbers (n=0to3)

&Zn Store one of four dial strings (including a telephone number) of up to 45 digits in nonvolatile RAM.

For example: to store the telephone number 002852117 to RAM location 1, issue the following command:

Command:AT&Z1=002852117<CR>

2.2.b Commands Preceded by \
\An Select Maximum MNP Block Size

The modem will operate an MNP error corrected link using a maximum block size controlled by the
parameter supplied.The parameter value, if valid, is written to S40 bits 6 and 7.

\A0 64 characters.
\A1 128 characters. (Default)
\A2 192 characters.
\A3 256 characters.

Result Codes:

ERROR Otherwise.

OK n=0 to 3.

\Bn Transmit Break to Remote

In non-error correction mode, the modem will transmit a break signal to the remote modem with a length in
multiples of 100ms according to parameter specified. If a number in excess of 9 is entered, 9 is used. The
command works in conjunct i on with the \K command.

In error correction mode, the modem will signal a break through the active error correction protocol, giving
no indication of the length.

\B1-\B9 Break length in 100ms units. (Default=3)

(Non-error corrected mode only.)

Result Codes:

NO CARRIER If not connected or connec t ed i n fax modem mode.

OK If connected in data modem mode.

Note: When the modem receives a break from the remote modem, break is passed to the DTE as follows: In
non-error correction mode direct, the break

length is passed; in non-error correction mode normal and in

error correction mode, a 300 ms break is passed.

\Gn Modem to Modem Flow Control (XON/XOFF)

Enables or disables modem flow control during a Normal Mode connection. Since
Reliable Mode has its own method of flow control, the \Gn command is ignored when error correction is
selected. However, DTE-to-modem flow control remains active during reliable link.

\G0 Disable flow control. (Default)
\G1 Enable flow control.

\Kn Break Control

Determines the modem's response when a BREAK is received from the DTE or the remote modem,
according to the following conditions:

When a BREAK is received from the DTE during Normal or MNP Mode:

\K0,2,4 Modem enters Command Mode (waiting for an AT command) without sending a BREAK

\K1 Modem clears the terminal and modem buffers.
\K3 Modem does not clear the buffers.
\K5 Modem sends a BREAK to the remote modem in sequence with any transmitted data.

to the remote modem.

(Default)

When a BREAK is received from the remote modem during Normal Mode:

\K0,1 Modem clears the terminal and modem buffers.
\K2,4 Modem does not clear the buffers.

\K4,5 Modem sends a BREA K in sequence with any transmitted data.

When a BREAK is received from the DTE during Direct Mode:

\K0,2,4 Modem sends a BREAK to the remote modem.
\K1,3,5 Modem sends a BREAK to the remote modem.

\Nn Operation Mode Control

Selects the operating mode to be used during connection

\N0 S el ects Normal (speed buffering) Mode. (S ame as &Q6)
\N1 S el ects Direct (pass-through) Mode. (Same as &Q0)
\N2 S el ects Reliable Link Mode.
\N3 S el ects Auto-reliable Mode. Modem attempts to connect with error correction.
\N4 S el ect LAPM error-correction mode.
\N5 S el ect MNP error-correction mode.

\Vn Single Line Connect Message Enable

The single line connect message format can be enabled or disabled by the \Vn command as follows:

\V0 Connect messages are controlled by the com mand settings X, W, and S95.
\V1 Connect messages are displayed in the single li ne f ormat described below subject to t he

command sett i ngs V (Verbose) and Q (Quiet). In Non-Verbose mode (V0), single line
connect messages are disabled and a single numeric resul t code is generated for
CONNECT DTE.

When single line connect messages are enabled, there are no CARRIER, PROTOCOL, or COMPRESSION
messages apart from the fields described below.

The single line connect message format is:

CONNECT <DTE Speed></Modulation></Protocol></Compressi on></ Line Speed>/<Voice and
Data>

Where:

<DTE Speed= DTE speed, e.g., 57600.
Modulation= "V32" for V.32 or V.32bi s modulations.

Protocol= "NONE" for no protoc ol .

"V34" for V.34 modulations.
Note: Modulation is omit ted for all other modulations.

"ALT" for Microcom Net work Protocol.
"LAPM" for LAP-M protocol.

Compression= "CLASS5" for Microc om MNP5 compression.

"V42BIS" for V.42bi s compression.
Note: Compression is omitted if protocol is NONE.

Line Speed= Asymmetric rates are displayed as /rate:TX/rate:RX, e.g., /1200 TX/75 RX.

Symmetric rat es are displayed as a single DCE rate, e. g., 14400.

Voice and Data= Blank for Data mode only.

"SVD" for AudioSpan analog si multaneous audio/voice and data.
"DSVD" for G.729A or DigiTalk di gi tal simultaneous voice and dat a.

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. Resets S46 bit 1.
%C1 Enabl es MNP 5 data compression negotiati on. Resets S46 bit 1.
%C2 Enabl es V.42 bis data compress i on. Sets S46 bit 1.
%C3 E nabl es both V.42 bis and MNP 5 data compres sion. Sets S46 bit 1. (Default)

Result Codes:

OK n=0,1,2,or 3.

ERROR Otherwise.

%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). Applies to
dial-up line only. The parameter value valid is written to S41 bits 2 and 6. If enable, the modem attempts to
retrain for a maximum of 30 seconds.

%E0 Disable line quality monitor and auto-retrain.

%E1 Enable line quality monitor and auto-retrai n.
%E2 Enable line quality monitor and fallback/fall forward. (Default)
%E3 Enable line quality monitor and auto-retrai n, but hang-up immediately when EQM reaches

hang-up threshold. (fast hang-up)

%L Report Received Signal Level

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

009 -9 dBm.

010 -10 dBm.

011 -11 dBm.
043 -43 dBm.

%Q 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 or %E2.

%Un Select Law or A_Law Codec Type

This command selects Law or A_Law codec type for V.90 and K56 flex modulation similar to the
<x_law> parameter in the +MS command (see +MS command). This command overrides the <x_law>
setting specified in a previous +MS command and the <x_law> parameter in a +MS command overrides a
previous %Un command. This command also stores the selected setting directly to NVRAM.

%U0 Selects Law.
%U1 Selects A_Law.

Result codes:

OK n = 0 or 1.
ERROR Otherwise.

2.2.d Commands Preceded by +
+MS Select Modulation

This extended-format command selects the modulation and, optionally, enables or disables automode,
specifies the lowest and highest connection rates, selects u-Low or A-Low codec type, and enables or
disables robbed bit signaling generation (server modem) or detection (client modem) using one to five
subparameters. The command format is:

+MS=<mod> [,[<automode>][,[<min_rate>][,[<max_rate>][,[<x_law>][,[<rb_signaling>]]]]]]<CR>

Notes:

1. For 14400 bps and lower speeds, the Nn command and S37 register can alternatively be used, in
which case the +MS subparameters will modified to reflect the Nn and S37=x settings. Use of the Nn
and S37=x commands is not recommended but is provided for compatibility with existing
communication software. (S37 is not updated by the +MS command.)

2. Subparameters not entered (enter a comma only or <CR> to skip the last subparameter) remain at
their current values.

Reporting Selected Options

The modem can send a string of onformation to the DTE consisting of selected options using the following
command:

+MS?

The response is:

+MS: <mod>,<automode>,<min_rate>,<max_rate>,<x_law>,<rb_signaling>

For example,

K56flex: +MS: 56,1,300,56000,0,0

V.90: +MS: 12,1,300,56000,0,0,33600 (RC56 default values)

Reporting Supported Options

The modem can send a string of information to the DTE consisting of supported options using the following
command:

+MS=?

The response is:

+MS: (list of supported <mod> values), (list of supported <automode> values), (list of supported

<min_rate> values), (list of supported <max_rate> values), (l ist of supported <x_law> values), (list
of supported <rb_signaling> values)

For example,

+MS: (0,1,2,3,9,10, 11,12,56,64,69), (0,1), (300-33600), (300-56000), (0,1), (0, 1)

Subparameter Definitions

1. <mod>= A decimal number which specifies the preferred modulation (automode enabled) or
modulation (automode enabled) to use in originating or answering a connection. The options are:

<mod> Modulation Possible Rates (bps)1 Notes

0 V.21 300
1 V.22 1200
2 V.22 bis 2400 or 1200
3 V.23 1200 See Note 2
9 V.32 9600 or 4800
10 V.32 bis 14400, 12000, 9600, 7200 or 4800
11 V.34 33600, 31200, 28800,

26400, 24000, 21600, 19200, 16800,
14400, 12000, 9600, 7200, 4800, or 2400

12 V.90 56000, 54677, 53333, 52000, 50669,

56 K56flex 56000, 54000, 52000, 50000, 48000,

64 Bell 103 300
69 Bell 212 1200

Notes: 1. See optional <automode>, <min_rate>, and <max_rate> s ubparameters.

2. For V.23, originating m odes transmit at 75 bps and receive at 1200 bps; answering modes transmit at
1200 bps and receive at 75 bps. The rate is al ways s pecified as 1200 bps.

49333, 48000, 46667, 45333, 42667,
41333, 40000, 38667, 37333, 36000,
34667, 33333, 32000, 30667, 29333,
28000

46000, 44000, 42000, 40000, 38000,
36000, 34000, 32000

The modem may also automatically switch to another modulation (automode), subject to the following
constraints:

a. T he modem may not be able to automatically switch from the current modulation (specified by

<mod>) to some other modulation. For example there is no standard way to automode from Bell
103 to V.23.

b. The DTE may disable automode operation (see <automode> below).

c. The DTE may constrain the range of modulations available by specifying the lowest and highest

rates (see <min_rate> and <max_rate> below).

2. <automode> is an optional numeric value, which enables or disables automatic modulation
negotiation using V.8 bis/V.8 or V.32 bis Annex A. The options are:

<automode> Option Selected Notes

0 Automode disabled
1 Automode enabled using V.8 bi s/V.8 or V.32 default

Annex A

The default value is 1, which enablesautomode. Note, however, there are modulations for which
there is no automode negotiation, e.g., Bell 212 (<mod>=69).

For <automode> = 0 (automode disabled, i.e., fixed modulation):

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=10, 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=10, 0, 2400, 14400 selects V .32 bis 14400, 12000, 9600, 7200, or 4800 bps.

c. To emulate issuance of the N0S37=x command sequence to select fixed mode operation, specify

the <max_rate>and<min_rate> both to be the (same) requested speed, and <mod> to be the
modulation for that speed. For example,

+MS=11, 0, 16800, 16800 selects V.34 16800 bps fixed mode (no comparable S37 command).
+MS=10, 0, 12000, 12000 selects V.32 bis 12000 bps fixed mode (same as N0S 37=10).

For <automode> = 1 (automode enabled, i.e., automatically selected speed and modulation):

The modem connects at the highest possible rate in accordance with V.8 bis/V.8, or V.32 bis Annex
A if V.8 bis/V.8 is not supported by the remote modem.

a. If <max_rate> is greater than the highest rate supported by the modulation specified by <mod>,

the modem automodes down from the highest

+MS=10, 1, 1200, 24000 selects automoding down from V.32 bis 14400 bps.

rate of the selected modulation. For example,

b. To emulate issuance of the N1S37=x sequence command, specify the modulation and the rate to

start automoding down from using <mod> and <max_rate>, respectively. Set <min_rate> to 300
to allow automoding all the way to V.21 300 bps. For example:

+MS=11, 1, 300, 16800 selects automodestarting at V.34 16800 bps (no comparable S37 command).
+MS=9, 1, 300, 12000 selects automode starting at V.32 bis 12000 bps same as N1S37=10).

3. <min_rate> is an optional number specifies the lowest rate at which the modem may establish a

connection. The value is decimal coded, in units of bps, e.g., 2400 specifies the lowest rate to be
2400 bps. The default is 300 for 300 bps.

4. <max_rate> is an optional number specifies the highest rate at which the modem may establish a

connection. The value is decimal coded, in units of bps, e.g., 14400 specifies the highest rate to
be 14400 bps. The default is 28800 for 28800 bps.

5. <x_law> is an optional number, which specifies the codec type. The options are:

0=µ-Law
1=A-Law

Note that ATZ will reset the <x_law> selection to 0 (µ-law).

* Also note that the <x_law> parameter in a +MS command overrides a previous %Un command
and a %Un command overrides the <x_law> setting specified in a previous +MS command.

6. <rb_signaling> is an optional number, which enables or disables robbed bit signaling generation

in a server modem or enables or disables robbed bit signaling detection in a client modem. The
options are:

0=Robbed bit signaling generation (server modem) or detection (client modem) disabled. (Default)
1=Robbed bit signaling generation (server modem) or detection (client modem) enabled.

Note that ATZ will reset the <rb_signaling> selection to 0. (Default)

Result Codes:

OK Valid subparameter st ri ng
ERROR Otherwise.

2.2.e Commands Preceded by **

** Download to Flash Memory

The linear flash memory downloader in the modem firmware allows flash memory connected to the modem
external memory bus to be upgraded with revised modem firmware. This process transfers (uploads) the
upgraded modem firmware (data) from the host computer to the modem which transfers (downloads) the
data to the flash memory device. Note that this command apply only to the modem with flash memory.

Programming the flash memory device is a two-step process.

1. When the AT** command is issued, the modem firmware boot loader is invoked and the user will first
load a flash load module (FLM) into the modem's RAM. The FLM contains the programming algorithm
for the flash memory device being programmed and any messages that may be sent during the load
process.

2. The user will then load the new modem firmware, which the FLM will then program into the flash
memor y device.

Procedure:

1. Install in the modem a flash memory programmed with the modem firmware; ensure that the flash
memory device is programmed with the sector secure mode set to UNSECURE (AMD only), otherwise
the device connot be re-programmed in the modem.

2. Put the FLM file and the new modem firmware file (e.g., V1400DS.S37) in an appropriate directory on
the computer's hard disk.

3. Configure the communications application program for a DTE rate of between 9600 bps and 57600 bps
(57600 bps is faster) and RTS/CTS flow control. A load at 57600 bps will take approximately 2
minutes; a load at 19200 bps will take approximately 6 minutes.

4. Check the modem for response by typing AT.

5. Initiate the download process using the AT**n command, where:

AT**/AT**0 download speed is the last sensed speed (recommended command).
AT**1 Download speed is 38.4k bps.

AT**2 Download speed is 57.6k bps.

The "Download initiated" message appears upon issuing the AT**n command.

6. Perform an ASCII upload of the FLM file (e.g., AMDE.S37) from the host computer to the modem
RAM using an industry standard communications software of an equivalent process ( ensure that all ASII
transmit or pacing is turned off).

To abort the load at this point, wait for the FLM download process to time-out, send a bad S37 record,
or reset (POR) the modem. If the load process times-out, the modem must be reset (ATZ) before the
FLM can be loaded again.

7. After the FLM has been loaded, perform an ASCII upload of the new modem firmwarehex file (e.g.,
RC288ACi.S37) from the host computer to the modem RAM using industry standard communications
software or an equivalent process. There will be a 3-second pause after the first record of the
RC288AXX.S37 file is sent, which is the FLASH erase cycle. There is no turning back at this point.

If the flash download fails (because of a bad .S37 record for example) or the upload is aborted, as long
as the modem is not turned off or reset, it will remain in the flash load cycle and the upload can be re­attempted at step 7.

A "Wrong Device" message is displayed if an incorrect FLM is used. In this case, restart at step 5 and
upload the correct FLM file.

A "Wrong Hex file or flow control" message is displayed if an incompatible hex file format is used
(non-Motorola S3 format) or if the DTE ignores flow controls (the flash download uses both Xon/Xoff
and RCS/CTS flow control). If the wrong format was used, reinitiate the upload at step 7 using a correct
firmware hex file.

8. A "Device successfully programmed" message is displayed by the FLM at the completion of a
successful download and the modem will do a cold start.

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 S­register 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 a gain 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 overflow the 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.

JPerform MNP

Perform MNP 10 link negotiation at 1200 bps (for this call only).

K Enable Power Level

Enable power level adjustment during MNP 10 link negotiation (for this call 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.

S Dial a Stored Number

S is used to dial one of four numbers stored in nonvolatile memory. For example, instead of entering a dial
string, you can use this command:

Command: ATDTS=1<CR>

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 b efore dialing the next number. W is most often used in a PBX system to wait for the dialtone of an
outside telephone line.

2.4 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

+++ followed by AT <CR> allows the modem to escape from the data mode to the on-line command state
(command state without breaking the established connection.)

To escape, stop transmitting data, wait at least one escape guard time (the default time is one second), and
then enter three consecutive escape characters (the default character is +) followed by AT <CR>.

The modem will return to the command state and send the OK result code to the screen. Note that the
escape command is the only command that can be recognized by the modem in the one-line state; it cannot
be recognized in the command state.

2.5 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 timeout
BUSY 7 Detected a busy tone after dialing
NO ANSWER 8 No ringbac k 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 establi shed at 19200 bps
CONNECT 38400 17 Connection established at 38400 bps
CONNECT 57600 18 Connection established at 57600 bps
CONNECT 115200 19 Connec tion established at 115200 bps
CONNECT 230400 20 Connection es tablished 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 dial ed i s considered 'delayed' due to

BLACKLISTED 32 Call fails to connec t and the number dialed is considered 'bl acklisted'
FAX 33 A fax modem connection is establi shed in a facsimile mode
DATA 35 A data modem connection is established in a fac simile mode
CARRIER 300 40 Carrier detected
CARRIER 1200TX/75RX V.2344 Carrier detected
CARRIER 75RX/1200TX V.2345 Carrier detected

country blacklist i ng requi rements

CARRIER 1200 46 Carrier detected
CARRIER 2400 47 Carrier detected
CARRIER 4800 48 When the 4800 bps data rate in V .32 bis or V.32 mode has been

detected on the line

CARRIER 7200 49 When the 7200 bps data rate in V .32 bis mode has been detected

on the line

CARRIER 9600 50 When the 9600 bps data rate in V .32 bis or V.32 mode has been

detected on the line

CARRIER 12000 51 When the 12000 bps data rate in V.32 bis mode has been det ected on the

line

CARRIER 14400 52 When the 14400 bps data rate in V.32 bis mode has been det ected on the

line
CARRIER 16800 53 When the 16800 bps data rate in V.34 mode has been detec ted on the line
CARRIER 19200 54 When the 19200 bps data rate in V.34 mode has been detec ted on the line
CARRIER 21600 55 When the 21600 bps data rate in V.34 mode has been detec ted on the line
CARRIER 24000 56 When the 24000 bps data rate in V.34 mode has been detec ted on the line
CARRIER 26400 57 When the 26400 bps data rate in V.34 mode has been detec ted on the line
CARRIER 28800 58 When the 28800 bps data rate in V.34 mode has been detec ted on the line
CONNECT 16800 59 Connection established at 16800 bps
CONNECT 21600 61 Connection established at 21600 bps
CONNECT 24000 62 Connection established at 24000 bps
CONNECT 26400 63 Connection established at 26400 bps
CONNECT 28800 64 Connection established at 28800 bps
COMPRESSION CLASS 5 66 MNP class 5 compression in use
COMPRESSION V.42BIS 67 V.42 bis com pression in use
COMPRESSION NONE 69 No c o mpression is being used
PROTOCOL:NONE 76 Normal m ode selected
PROTOCOL:LAPM 77 LAPM mode selected
CARRIER 31200 78 When the 31200 bps data rate in V.34 mode has been det ected on the line
CARRIER 33600 79 When the 33600 bps data rate in V.34 mode has been det ected on the line
PROTOCOL:ALT 80
PROTOCOL:ALT-CELLULAR 81
CONNECT 33600 84 Connection established at 33600 bps
CONNECT 31200 91 Connection established at 31200 bps
CARRIER 32000 150 Connect i on established at 32000 bps
CARRIER 34000 151 Connect i on established at 34000 bps
CARRIER 36000 152 Connect i on established at 36000 bps
CARRIER 38000 153 Connect i on established at 38000 bps
CARRIER 40000 154 Connect i on established at 40000 bps
CARRIER 42000 155 Connect i on established at 42000 bps
CARRIER 44000 156 Connect i on established at 44000 bps
CARRIER 46000 157 Connect i on established at 46000 bps
CARRIER 48000 158 Connect i on established at 48000 bps
CARRIER 50000 159 Connect i on established at 50000 bps
CARRIER 52000 160 Connect i on established at 52000 bps
CARRIER 54000 161 Connect i on established at 54000 bps
CARRIER 56000 162 Connect i on established at 56000 bps
CONNECT 32000 165 Connect i on established at 32000 bps
CONNECT 34000 166 Connect i on established at 34000 bps
CONNECT 36000 167 Connect i on established at 36000 bps
CONNECT 38000 168 Connect i on established at 38000 bps
CONNECT 40000 169 Connect i on established at 40000 bps
CONNECT 42000 170 Connect i on established at 42000 bps
CONNECT 44000 171 Connect i on established at 44000 bps
CONNECT 46000 172 Connect i on established at 46000 bps
CONNECT 48000 173 Connect i on established at 48000 bps
CONNECT 50000 174 Connect i on established at 50000 bps
CONNECT 52000 175 Connect i on established at 52000 bps
CONNECT 54000 176 Connect i on established at 54000 bps
CONNECT 56000 177 Connect i on established at 56000 bps
+FCERROR +F4

** V.90 Result Codes

Speed Carrier Connect

28000 180 180
29333 181 181
30667 182 182
32000 150 165
33333 183 183

34667 184 184
36000 152 167
37333 185 185
38667 186 186
40000 154 169
41333 187 187
42337 188 171
45333 189 189
46667 190 190
48000 158 173
49333 191 191
50667 192 192
52000 160 175
53333 193 193
54667 194 194
56000 162 177

3 - S REGISTERS REFERENCE

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

The S registers are summarized in Fig. 3-1, along with their default values. Registers denoted with an " * "
may be stored in one of the two user profiles by entering the &Wn command. One of these profiles may be
loaded at any time by using the Zn command.

The factory default values are stored in ROM and are loaded into the active configuration at power-up or by
the Zn command. In addition, the designated default profile is subsequently loaded, and may change some
of the factory default values. The designated default profile can be changed by entering the &Yn command,
where 'n' is one of the two possible user profiles. The factory defaults can be loaded at any time by entering
the &F command.

3.1 Register Summary

The following chart summarizes your modem's registers:

Reg.# Range Unit Dec Hex Descrip ti on

S0 0 - 255 rings 0 00h Number of rings before auto-answer.
S1 0 - 255 rings 0 00h Ring count.
S2 0 - 255 ASCII 43 2Bh Escape character code.
S3 0 - 127 ASCII 13 0Dh Command terminator (<CR>c haracter).
S4 0 - 127 ASCII 10 0Ah Line feed charact er.
S5 0 - 255 ASCII 8 08h Backs pace 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 com ma (dial delay).
S9 1 - 255 1/10 sec. 6* 06h Carrier detect response time.
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.
S14 [Bit Mapped Options]* 138 8Ah
S18 0 - 255 seconds 0* 00h Test mode tim er.
S21 [Bit Mapped Options] 4* 04h V.24/General bit-mapped options.
S22 [Bit Mapped Options] 117* 75h Speaker/Result s Bit-mapped options.
S23 [Bit Mapped Options] 54 36h
S24 0 - 255 seconds 0 00h Sleep Inactivi ty Timer.
S25 0 - 255 seconds 5* 05h Dalay to DTR.
S26 0 - 255 1/100 sec 1* 01h RTS to CTS Delay Interval.
S28 [Bit Mapped Options] 0* 00h
S29 0 - 255 10 ms 70* 46h Flash Dial Modifier Time.
S30 0 - 255 10 s 0* 00h Inactivity Disconnect Timer.

Default

S31 [Bit Mapped Options] 194* C2h
S32 0 - 255 ASCII 17 11h XON Character.
S33 0 - 255 ASCII 19 13h XOFF Character.
S36 7* 07h LAPM Failure Control.
S37 0* 00h Desired Line Connection S peed.
S38 0 - 255 seconds 20* 14h Delay before Forced-Disconnect.
S39 3 03h Flow Control.
S40 [Bit Mapped Options] 104 68h General Bit Mapped Options.
S41 3 03h Bit-Mapped Options.
S46 138* 8Ah Protocol Selection.
S48 7* 07h V.42 Negotiation Action.
S82 128* 80h Break Handling Opti on.
S86 0 - 255 Call Failure Reason Code.
S91 0 - 15 dBm 10 0Ah PSTN Transmit Attenuation Level .
S92 0 - 15 dBm 10 0Ah Fax Transmit Attenuation Level.

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

Fig. 3-1 S-Register Summary

.

3.2 Glossary of 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

S1 Ring Count

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

S2 ASCII Value of 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.

S3 ASCII Value of Carriage Return

S3 stores the ASCII value of the carriage return character. (Pertains to asynchronous operation only.)

Range: 0 - 127, ASCII decimal.

S4 ASCII Value of Line Feed Character

S4 stores the ASCII value of the line feed character, if your computer does not recognize the default as a
line feed, change the value. A value greater than 127 disables the line feed. When disabled, the line feed
character that precedes or follows a result code is canceled.(Pertains to asynchronous operation only.)

Range: 0 - 127, ASCII decimal.

S5 ASCII Value of Backspace Character

S5 stores the ASCII value of the backspace character. The backspace is used to edit a command line. If your
computer does not recognize the default as a backspace, change the value. (Pertains to asynchronous
operation only.)

Set S5 to any value from 0 to 31 or 127. Do not set it to any value from 32 through 126 because these
values correspond to printable ASCII characters. A value greater than 127 disable the backspace and makes
it impossible to edit a command line.

Range: 0 - 32, ASCII decimal.

S6 Wait Time before Blind Dialing

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

Range: 2 - 255 seconds.

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 mod em after going off-hook when answeri ng a call.

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

Range: 1 - 255 seconds.

S8 Pause Time for Comma

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.

S9 Carrier Detect Response Time

S9 determines how long a carrier signal must be present for the modem to confirm it. The longer the
response time, the easier it is for the modem to correctly recognize a carrier without mistaking other signals
or transient noise on the line as a carrier.

Range: 1 - 255 tenths of a second.

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.

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.

S12 Escape Guard Time

S12 determines the escape guard time. The escape guard time is the minimum waiting time required before
and after entering the escape code (three consecutive escape characters) in the on-line state. It is also the
maximum waiting time allowed between any two consecutive escape characters. If the waiting time before
or after the escape code is shorter than the guard time, or if the waiting time between consecutive escape
characters is longer than the guard time, then the modem does not recognize the escape command and stays
on-line.

If the escape guard time is set at 0 second, it is impossible to return the modem to command state.

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

S14 Bit Mapped Options

bit 1 (E) 0 Disabled.
1 Enabled.
bit 2 (Q) 0 Disabled.
1 Enabled.

Bit Value Description

bit 3 (V) 0 Numeric.
1 Verbose.

bit 4 Reserved
bit 5 (P or T) 0 T (Tone dial).
1 P (Pulse dial).
bit 6 Reserved
bit 7 0 Answer mode.
1 Originate mode.

S18 Test Timer

The test timer determines how long tests are performed. The modem automatically ends the test when the
test time is expired. The default value of 000 disables the test timer. When the timer is thus disabled, all
tests must be ended with the &T0 command.

Range: 0 - 255 seconds.

S21 V.24/General Bit Mapped Options

Bit Value Descrip tion
bit 0 0 &J0.
1 &J1.
bit 2 0 &R0.
1 &R1.

bit 3,4 00 &D0.

01 &D1.
10 &D2.
11 &D3.
bit 5 0 &C0.
1 &C1.
bit 6 0 &S0.
1 &S1.

1 Y1.

bit 7 0 Y0.

S22 SPEAKER/Results Bit Mapped Options

bit 0,1 00 Select L0.
01 Select L1.
10 Select L2.
11 Select L3.
bit 2,3 00 Select M0.
01 Select M1.
10 Select M2.
11 Select M3.
bit 4,5,6 000 Select X0.
001 Reserved.
010 Reserved.
011 Reserved.
100 Selec t X1.
101 Selec t X2.
110 Selec t X3.
111 Selec t X4
bit 7 [RESERVED]

Bit Value Description

S23 Bit Mapped Options

bit 0 0 &T5.
1 &T4. (default)
bit 1,2,3 000 Communicat i ons rate = 300 bps.
001 Com munications rate = 600 bps.
010 Com munications rate = 1200 bps.
011 Com munications rate = 2400 bps.
100 Com munications rate = 4800 bps.
101 Com munications rate = 9600 bps.

111 Com munications rate = 38400 bps or higher.
bit 4,5 00 Even parity selected.
01 Not used.
10 Odd.

Bit Value Description

110 Communications rate = 19200 bps.

11 None.
bit 6,7 00 &G0.
01 &G1.
10 1800Hz. (&G2)

S24 Sleep Inactivity Timer

Set the length of time, in units of 10 seconds, that the modem will operate in normal mode with no detected
telephone line of DTE line activity before entering low-power sleep mode.

Range: 0 - 255 (seconds)

S25 Delay to DTR

S25 serves two purposes. When the modem is operating in synchronous mode 1, the value assigned to S25
specifies the length of time the modem waits after a connection has been made before examining DTR. This
allows the modem to ignore an ON-to-OFF transition of DTR, giving the user time to disconnect the modem
from the asynchronous terminal and attach it to a synchronous terminal, without forcing the modem back to
the asynchronous command mode. During this time, the value for S25 is read in whole seconds.

In all other modes, and after call establishment in synchronous modes 1 and 4, the value is read in 1/100
seconds. In any mode, a change in DTR (ON or OFF) that persists for a period shorter than the value held in
S25 is ignored by the modem while it is in data mode.

Range: 0 - 255 (1 second for synchronous mode 1;

0.01 second otherwise)

S26 RTS to CTS Delay Interval

Pertains to synchronous operation only. When CTS tracks RTS (&R0) and the modem detects an ON-to­OFF transition on RTS, this register sets the time delay before the modem turns CTS to ON.

Range: 0 - 255 hundredths of a second

S28 Bit Mapped Option Status

bit 0, 1 Reserved.

bit 3, 4 Pulse dialing (&Pn).
0 = 39%-61% make/break rat i o at 10 pul se per second (&P0).
1 = 33%-67% make/break rat i o at 10 pul se per second (&P1).
2 = 39%-61% make/break rat i o at 20 pul se per second (&P2).
3 = 33%-67% make/break rat i o at 20 pul se per second (&P3).
bit 5 Reserved.
bit 6-7 MNP Link Negotiation Speed (*Hn).
0 = Link negotiation at highest speed (*H0).
1 = Link negotiation at highest speed (*H1).
2 = Link negotiation at highest speed (*H2).

bit 2 Reserved.

S29 Flash Dial Modifier Time
Range: 0 - 255 10ms intervals

S30 Inactivity Disconnect Timer

This register determines the length of time, in seconds, the modem waits before disconnecting when no data
is sent or received. This only operates in &Q5 and &Q6 modes, a value of 0 in this register disables the
timer.

Range: 0 - 255 tenths of a second

S31 Bit Mapped Options

bit 1 Controls auto line speed detection (Nn).
0 Disable (N0).
1 Enable (N1).
bit 2, 3 Controls error correcti on progress messages (Wn).
00 DTE speed only (W0).
01 Full reporting (W1).

Bit Value Description

10 DCE speed only (W2).

S32 XON Character
Range: 0 - 255, ASCII decimal

S33 XOFF Character
Range: 0 - 255, ASCII decimal

S36 LAPM Failure Control

This register is read when the S48 register contains the value 128 or if an attempted
error-correction link fails. These fallback options are initiated immediately upon
connection if S48 = 128

Bit Value Action
bit 0,1,2 000 Modem disconnect.
001 Modem stays on-line and Direct mode connections

010 Reserved.
011 Modem stays on-line and a Normal mode connection is
established.
100 An MNP connection is attempted and i f it fails, the modem

101 An MNP connection is attempted and i f it fails, a direct
110 Res erved.

111 An MNP connection is attempted and if it fai ls, the normal

established.

disconnects.
mode connection is es tablished.

mode connection is es tablished.

S37 Desired Line Connection Speed

bit 0-4 Desired line connec tion speed. This is interlink ed with
the Fn command. If an invalid num ber i s entered, the number
is accepted into the register, but S37 will act as if the
default value has been entered.
0 = Attempt auto m ode connection.

1-3 = Attempt to connect at 300 bps.

4 = Reserved.
5 = Attempt to connect at V.22 1200 bps.

6 = Attempt to connect at V.22bis 2400 bps.
7 = Attempt to connec t at V.23.
8 = Attempt to connect at V.32 bis/V.32 4800 bps.
9 = Attempt to connect at V.32 bis/V.32 9600 bps.
10 = Attempt to connect at V.32 bis 12000 bps.
11 = Attempt to connect at V.32 bis 14400 bps.
12 = Attempt to connect at V.32 bis 7200 bps.
bit 5-7 Reserved.

S38 Delay Before Forced-Disconnect

This register controls how long the modem waits, after receiving the ATH command or loss of DTR, before
it disconnects from the telephone line. When connected in an error-corrected mode, you can use this register
to ensure that all data is transmitted from the modem's buffer before the modem disconnects.

If you set S38 between 0 and 254, the modem waits that number of seconds for the remote modem to
acknowledge all data before it disconnects. If you set S38 to 255, the modem waits indefinitely for the
remote modem to acknowledge all data.

Range: 0 - 255 seconds

S39 Flow Control

Bit Value Connect speed

bit 0-2 000 No flow cont rol .
011 RTS/CTS &K3.
100 XON/XOFF &K4.
101 Trans parent XON &K5.
110 Both Method &K6.
bit 3-7 Reserved.

S40 General Bit Mapped Options

Bit Valu e Description
bit 0-1 MNP Extended Services (-Kn).
0 Disable extended services (-K0).
(Defaul t for non MNP 10 models).
1 Enable extended services (-K1).
(Default for MNP 10 model s).
2 Enable extended services (-K2).
bit 2 Power level Adjustment for Cellular Use ( )Mn).
0 Auto - adjustment ( )M0).
1 Force adjustment ( )M1).

bit 3-5 Break handling (\Kn).

0 \K0.
1 \K1.
2 \K2.
3 \K3.
4 \K4.
5 \K5.

bit 6-7 MNP block size (\An).

0 64 chars (\A0).
1 128 chars (\A1).
2 192 chars (\A2).
3 256 chars (\A3).

S41 Bit-Mapped Options

Bit Value Description

bit 0,1 Compress selection %Cn.
0 0 Disable %C0.
0 1 MNP 5 %C1.
1 0 V.42 bis %C2.
1 1 MNP 5 and V.42 bis (%C3)
bit 6,2 Auto retrain %En.
0 0 Retrain disable %E0.
0 1 Retrain enable %E1.
1 0 Fallback/fall forward enable (%E2).
bit 3 Modem-to-modem flow cont rol \G.
0 Disable \G.
1 Enable \G1.
bit 4 Block mode control \Ln.
0 Store mode \L0.
1 Block mode \L1.
bit 5 Reserved.
bit 7 Enable fallback to V. 22bi s/V.22 (-Qn).
0 Disable (-Q0).
1 Enable (-Q1).

S46 Protocol Selection

This register controls whether the modem tries to use data compression when the modem establishes an
error corrected link. The default is for the modem to use data compression (138).

Value Description
136 Execute error correction protocol with no com pression.
138 Execute error correction protocol with com pression.

S48 V.42 Negotiation Action

Value Description
0 Disabl e negotiation: bypass the detecti on and negotiation phases.
7 Enable negot i ation.
128 Disable negotiation: bypass the detec tion and negotiation phases.

S82 Break Handling Option

S82 is for compatibility purposes only, changing this register will not any affect.

S86 Call Failure Reason Code

When the modem issues a NO CARRIER result code, a value is written to this S-Register to help determine
the reason for the failed connection. S86 records the first event that contributes to a NO CARRIER
message. The cause codes are:

Range: 0, 4, 5, 9, 12, 13, or 14

S86 = 4 Loss of carrier.
S86 = 5 V.42 negotiation failed to det ect an error-correction modem

at the other end.
S86 = 9 The modems could not f i nd a common protocol.
S86 = 12 Normal dis connect initiated by the remote modem.
S86 = 13 Remote modem does not respond after 10 retrans mission of

S86 = 14 Protocol violation.

S86 = 0 Normal disconnect , no error occurred.

the same mess age.

S91 PSTN Transmit Attenuation Level

Sets the transmit attenuation level from 0 to 15 dBm for the PSTN mode resulting in a transmit level from 0
to -15 dBm.

Range: 0 to 15 dBm (Corresponding to 0 to -15 dBm transmit level).

S92 Fax Transmit Attenuation Level

Sets the transmit attenuation level from 0 to 15 dBm for the fax mode resulting in a transmit level from 0 to

-15 dBm.

Range: 0 to 15 dBm (Corresponding to 0 to -15 dBm transmit level).

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.

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.

5 COMPRESSION: result code.
6 Reserved.
7 Reserved.

Bit Description

4 Reserved.

4 - TESTING

The modem provides five testing features to identify fault location when transmission quality is not good:
local digital loopback, local analog loop back, local analog loopback with self-test, remote digital loopback,
and remote digital loopback with self-test. These tests are initiated with the &Tn command described in
Chapter 2.

4.1 Local Analog Loopback

The local analog loopback test checks the integrity of the local computer or terminal and the local modem.
During the test, the local modem internally loops data sent from the local computer or terminal back to the
same computer or terminal as shown in Figure 4-1. During the test, data is not transmitted to the remote
modem.

If characters are looped correctly during this test, both the modem and the local computer or terminal are
functioning correctly. If incorrect characters appear on the screen, either the local computer or terminal or
the local modem is in error.

To perform a local analog loopback, put the local modem in the command state. If it is on-line, issue the
escape command + + +, to return to the command state.

Example 1 - test timer disabled

Command: AT&Q0<CR>
ATS18=0&TI <CR>

Result: CONNECT 56000

Test message: THE QUICK BROWN FOX JUMPS OVER THE
LAZY DOG 1234567890

Escape: + + +
(return to the on-line command state)

Result code: OK

Command: AT&T0 <CR> (end the test)

Result code: OK

Here, the test timer is disabled and the modem sets up an internal analog loop as shown in Figure 4-1. When
the loopback is established, the modem goes on-line and the test message (any character you type) is looped
back on the screen for verification. Finally, +++ returns the modem to the command state and &T0 ends
the test and breaks the internal analog loop.

The following command sequence is the same as the previous one except that the test timer is set to 60
seconds. At the end of the test time, the timer expires, the test ends, and the test result is reported.

Example 2 - test timer enabled

Command: AT&Q0<CR>
ATS18=60&T1<CR>

Result: CONNECT 56000

Test message: THE QUICK BROWN FOX JUMPS OVER
THE LAZY DOG 1234567890

Escape: +++

Result code: OK

4.2 Local Analog Loopback with Self-Test

The local analog loopback with self-test checks the integrity of the local modem. In this test, an internally
generated data pattern of alternate binary ones and zeros (reversals) at the selected bit rate is looped through
the internal analog loop inside the local modem to an internal error counter as shown in Figure 4-2. An error
count of 255 indicates that 255 or more errors were detected.

Example-the test timer is disabled and 12 errors are found during the test

Command: AT&Q0<CR>
ATS18=0&T8<CR>

Result: OK

Command: AT&T0<CR> (ends the test)

Test result: 000

Result code: OK

5 - THROUBLESHOOTING 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 mo dem.

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 "OK"
depending o n what c ommunications 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. (Keep in mind that on
most systems, only two COM ports are available. One of them must be used as either 1 or 3, while
the other must be used as 2 or 4.) For example, if a mouse is set to COM 1, your modem should be
set to COM2 or COM4. Continue to the next step if the COM port address is OK.

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

Your Modem Does Not Dial Out

Make sure that your modem responds normally as described in section 4.1. If you can communicate through
the keyboard, check whether the modem is properly connected to the phone line.

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's baud rate.

Your Can't Transmit After You Ha ve 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.

6 - APPLICATION EXAMPLES

6.1 Dialing a Remote Modem

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

This command line inst ruct 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.

6.2 Dialing a Stored Number

Command line: AT&Z2=T03,709394<CR>

Command line: ATDS=2<CR>

The first command line store the dial string T03, 709394 to the 3rd location in NVRAM. Afterwards you
can use the second command line to dial this stored number. The dial string T03, 709394 will appear on the
screen to indicate the number being dialed.

6.3 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.

6.4 Auto Answer an Incoming Call

Command line: AT S0=2 &W &Y <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. The &W command writes this configuration to profile 0 in NVRAM. &Y command instruct the
modem to load profile 0 as the active configuration on power-up. The last two commands make S0=2 the
default value at power-up or reset.

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

6.5 Voice to Data Switch

Command line: ATA <CR> or ATX1D <CR>

If you are talking with a remote modem user through the telephone set and want to initiate data
communication with the remote modem, follow the procedures below:

1. You or the remote user issue an ATA command first to switch to data communication.

2. When the person on the other end hears an answer tone from the phone, issues an ATX1D command
(X1 to disable the dial tone monitor) to instruct the modem to go off-hook and wait for a carrier. If
connection is successful, the CONNECT XXXX result code will be displayed on the screen. Now
you can hang up your pho ne and begin data communication with the remote modem.

A - MNP 10 COMMANDS

A-1 MNP 10 COMMANDS
AT) Commands
)Mn Enable Cellular Power Level Adjustment

Enables or disables automatic adjustment of the transmit power level during link negotiation for reliable
links to accommodate the signaling requirements of cellular telephone equipment. The parameter value, if
valid, is written to S40 bit 2. Note that the @Mn command sets the initial transmit level.

)M0 Disables power level adjustment during MNP 10 link negotiation. (default)
)M1 Enables power level adjustment during MNP 10 link negoti ation.

Result Codes:

OK n = 0 or 1.
ERROROtherwise.

AT-Commands

*Hn Link Negotiation Speed

This command controls the connection speed for link negotiations before upshift occurs between two MNP
Class 10 modems. The parameter value, if valid, is written to S28 bits 6 and 7.

*H0 Link negotiation occurs at the highest supported speed. (default)
*H1 Link negotiation occurs at 1200 bps.
*H2 Link negotiation occurs at 4800 bps.

Result Codes:

OK n = 0 to 2.
ERROR Otherwise.

-Kn MNP Extended Services

Enables or disables conversion of a V.42 LAPM connection to an MNP 10 connection. The parameter
value, if valid, is written to S40 bit 0, 1.

-K0 Disables V.42 LA PM to MNP 10 conversion.

-K1 Enables V.42 LAP M to MNP 10 conversion. (default)

-K2 Enables V.42 LAP M to MNP 10 conversion; inhibits MNP Extended Services initiation during

V.42 LAPM answer mode detection phase.

Result Codes:

OK n = 0 or 1.
ERROR Otherwise.

-Qn Enable Fallback to V.22 bis/V.22

Enables or disables fallback from MNP 10 to V.22 bis/V.22. The parameter value, if valid, is written to S41
bit 7.

-Q0 Disables fallback to 2400 bps (V.22bis) and 1200 bps (V.22). Fallbac k is enabled only to 4800

bps.

-Q1 Enables fallback to 2400 bps (V.22bis) and 1200 bps (V.22). (default)

Result Codes:

OK n = 0 or 1.
ERROR Otherwise.

B - CALLER ID COMMANDS

#CIDn - Caller ID (Enables or disables Caller ID.)(for U.S.A)

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

#CID=0 Disables Caller ID.(Default.)
#CID=1 Enables Caller ID with formatted presentation to the DTE. The m odem will present the data

#CID=2 Enables Caller ID with unformatted presentation to the DTE. The modem will present the

items in a <Tag><Value> pair format. The expected pairs are data, time, caller code
(telephone number), and name.

entire packet of information, excluding the leading U's, in A S CI I printable hex numbers.

Result Codes:

OK n=0 or 2.
ERROR Otherwise.

Inquiries :

#CID? Retrieves the current Caller ID mode from the modem.
#CID=? Returns the mode capabilities of the modem in a list with each element separated

by commas.

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 num ber(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

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.

possible for Multiple Message Format.

caller, where P indicates that the calling number inform at i on i s not available sinc e the

NAME NAME=<listing name> where <listi ng 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

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, exclude s the leading U's (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

0412303332323234303539313435353132333435

RING

RING

RING

C - TECHNICAL SPECIFICATIONS

C.1 Features

Data Rates(bps)

K56flex: 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

V.90: 56000, 54667, 53333, 52000, 50667, 49333, 48000, 46667, 45333, 42667, 41333, 40000,

38667, 37333, 36000, 34667, 33333, 32000, 30667, 29333, 28000 (Receive only)

Compatibility
(Data) ITU-T V.90 (for modem which supports V.90 only), V.34, V.32 bis, V.32,

V.22 bis, V.23, V.22, and V.21

Bell: 212A and 103, K56flex

(Fax) IT U-T V.17, V.29, V.27 ter, and V.21 ch 2
Command Set Enhanced 'AT' command set, Fax Cla ss 1command

Flow Control Xon/Xoff, Hardware RTS/CTS

Data Compression V.42bis, MNP5

Error Correction V.42, MNP 2-4
Operation Full-or Half-duplex 28800 bps with 26400, 24000, 21600, 19200, 14400, 9600,

4800, 2400 and 1200 bps auto fallback

Test Modes Analog loopback, local digital loopback, and remote digital loopback
Audio Monitor Built-in speaker, with software-controllable volume control
Guard Tone 550/1800 Hz
Compliance FCC 15&68
Command Buffer 40 characters
Extra Memory 4 x 36 digits
Transmit Level -11(+/-1)dBm
Receive Sensitivity -40dBm

Pulse Dialing Specifications

Compatibility:

B - QUICK REFERENCE

A Go On-line in Answer Mode
Bn Select Protocol to 300 bps or 1200 bps
Cn Carrier Transmit Control
D Go On-line in Originate Mode
En Command Echo
Hn Hang Up
In Identification
Ln Control Speaker Volume
Mn Monitor Speaker On/Off
Nn Automode Enable
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
Wn Negotiation Progress Reporting
Xn Extended Result Codes
Yn Enables or Disables Long Space Disconnect
Zn Reset
&Cn Select DCD Options
&Dn DTR Option
&F Fetch Factory Configuration
&Gn Set Guard Tone
&Kn DTE/Modem Flow Control
&Mn Communication Mode
&Pn Select Pulse Dialing Make/Break Ratio
&Qn Asynchronous Mode Selection
&Sn DSR Option
&Tn Testing and Diagnostics (See Chapter 4)
&V View Configuration Profiles
&Wn Store the Current Configuration to Nonvolatile RAM
&Yn Select the Default Profile
&Zn Store Telephone Numbers (n=0 to 3)
\An Select Maximum MNP Block Size
\Bn Transmit Break to Remote
\Gn Modem to Modem Flow Control (XON/XOFF)
\Kn Break Control
\Nn Operating Mode Control

\Vn Single Line Connect Message Enable
%Cn Enable/Disable Data Compression
%En Enable/Disable Line Quality Monitor and Auto-Retrain or Fallback/Fall Forward
%L Report Received Signal Level
%Q Line Signal Quality
+MS Select Modulation
** Download to Flash Memory(For models with flash Memory only)
@ Answer
, Pause
! Initiate a Hookflash
; Return to Command State after Dialing
^ Tone Control
J Perform MNP
K Enable Power Level
L Re-dial Last Number
P Pulse Dialing
S Dial a Stored Number
T Touchtone Dialing
W Wait for Dialtone
A/ Repeat Command
+++ Escape

E - 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; the protocols supported by the modem

are listed in Appendix B.
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.
RAM - Random Access Memory.
ROM - Read-Only Memory. A chip inside the modem which stores the factory default settings. This

memory cannot be change d.

RTS - Request To Se nd.
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.

F - ASCII CODE TABLE

Decimal Hex Value Decimal Hex Valu e 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 {
028 1C FS 060 3C < 092 5C \ 124 7C |
029 1D GS 061 3D = 093 5D ] 125 7D }
030 1E RS 062 3E > 094 5E ^ 126 7E ~
031 1F US 063 3F ? 095 5F _ 127 7F DEL