Motorola SM56 user guide

UbiSurf SM56 Software Modem

AT Command

Reference Manual

UbiSurf SM56

Notices

Information in this document is subject to change without notice.
© 2004 Motorola. All rights reserved.

Trademarks and trade names may be used in this document to refer to
either the entities claiming the marks and names or their products.
Motorola disclaims any proprietary interest in trademarks and trade
names other than its own.

Introduction This document specifies the AT command set for Motorola UbiSurf SM56

softmodem product family. The details of the supported commands, responses, and
registers used by Motorola UbiSurf SM56 soft modem products are provided in this
reference manual.

In This Document Topic See Page

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

AT Commands - Basics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

+++ (Plus-Plus-Plus) Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

AT and AT& (Ampersand) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Table 1: AT and AT& Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

AT% (Percent) and AT\ (Backslash) Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Table 2: AT% (Percent) and AT\ (Backslash) Commands . . . . . . . . . . . . . . . . . 7

AT* (Asterisk) Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Table 3: AT* (Asterisk) Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

AT+ (Plus) Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Table 4: AT+ (Plus) Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

ATS (S-Register) Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Table 5: ATS (S-Register) Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

AT#UD Unimodem Diagnostic Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Table 6- AT#UD Last Call Status Report Format . . . . . . . . . . . . . . . . . . . . . . 29

Table 7- Call Setup Result Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Table 8– Multimedia modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Table 9– DTE-DCE modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Table 10– V.34 INFO bit report (applicable only to V.34 or V.90/V.92 calls) . 32

Table 11– gstnModulationSchemeActive from 3.7.2/V.58 . . . . . . . . . . . . . . . 33

Table 12– errorControl Active from 3.5.2/V.58 . . . . . . . . . . . . . . . . . . . . . . . . 33

Table 13– compressionActive from 3.2.2/V.58 . . . . . . . . . . . . . . . . . . . . . . . . 34

Table 14– callCleared codes from 3.6.4/V.58-1994 . . . . . . . . . . . . . . . . . . . . . 34

Table 15– Completed Data Call, with some errors and rate retrain during the call

36

Event Reporting Word . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

1

AT Commands ­Basics

Attention (AT) commands are the means by which you control and monitor a
modem. Typically, the communications application automatically issues them, and
you need not know the commands and their options.

However, to custom-configure the modem for an application, or to optimize
performance, you can issue commands through the communications application
yourself. In most communications applications, there is a menu item, or option, for
entering extended or custom AT commands. See your communications application
documentation.

You can also configure the modem by issuing AT commands directly from a simple
terminal-emulation application such as ZTERM and PowerTerm.

To issue an AT command from the terminal-emulation application, you must ensure
that the modem is in command mode (in which it can detect and respond to
commands), rather than data mode (in which it is transmitting and receiving data). To
enter command mode from data mode, enter +++. You need not press the ENTER
key.

When entering AT commands, the following basic rules apply:

• AT commands can be entered in uppercase, lowercase, or mixed text

• The characters AT begin all AT commands, except A/ and +++

• The key used as the ENTER key is specified in S-Register S3

• The maximum command length is 64 characters.

You can enter more than one AT command on a line, and you can chain commands
using just one AT at the start. However, some commands must occur at the beginning
or end of the command line.

+++ (Plus-Plus­Plus) Commands

Some of the AT commands and options are product specific and may not be
applicable to the product you are using.

This command, known as the escape sequence, causes the modem to stop
transmitting data (if it is doing so), and go into command mode.

Issue this command at the computer keyboard, in the communications application's
terminal window, by typing the plus sign (+) three times.

Note

Do not press the ENTER key after the +++ command. It may cancel the
command.

2

AT and AT&
(Ampersand)

The modem responds to the following AT and AT & command options.

The letters AT (or at) must precede all commands except A/ and +++. Factory­default options are underlined.

Table 1: AT and AT& Commands

Command Option Description

A (none) Answer incoming call

A/ (none) Repeat Last Command

D (none) Dial a Number

E Echo Async (Keyboard) Input to Terminal

E0 Disable

Re-issues the previous command to the modem.
(Do not press Return; the command executes as soon as the

/ is pressed.)

Instructs the modem to dial the telephone number that you
enter immediately after the ATD command. Example:
ATD5554678.

Note

If multiple ATD commands are used in speakerphone
mode, the modem must be forced to blind-dial after
dial-tone detection.

Determines whether the characters you type at the key­board are displayed (echoed) to the terminal-emulation
window (if it is active) or to the communications applica­tion.

E1

Enable

HHook

H0 Go on Hook (disconnect from the telephone line; hang up)

H1 Go off Hook (connect to the telephone line)

I Request Information From Modem

I0 “5600”

I1 Software driver Version “Apple Version ###”

I2 “OK”

I3 Software Version

I4 “Apple Internal Modem”

I5 Country Code in Hex

I6 Country Code

I7 Product Code

I8 Disconnect Reason

3

Table 1: AT and AT& Commands

Command Option Description

I9 Country Name

I12 Apple Product Code

L Speaker Volume

L0, L1 Low

L2

L3 High

M Speaker Control

M0 Off

This parameter determines the volume, for call-progress
monitor only, of sounds such as dialing, ringing, busy,
negotiation.

Medium

M1

On During Training Only

M2 Always On

M3 Off during dialing; on during call progress; off during data

transfer

O Return to On-Line Mode

This parameter determines whether the modem initiates a
retrain after changing from escape mode to data mode, or
after a semi-colon in dial strings.

O0 No Retrain

O1 Retrain

O2 Initiate Rate Renegotiation

O3 Rate Renegotiation with silence

P P Pulse Dial

Instructs the modem to dial the telephone number that you
enter immediately after the ATDP command using pulse
dial mode.

Example: ATDP5554678.
This command uses Pulse Dialing to dial the number

5554678

Q Result-Code Display

The modem can send result codes and connect messages to
the computer as a result of connecting or failing to con­nect; establishing a data rate; and establishing error-correc­tion and data-compression protocols. Refer to: ATV; AT\V;
AT X .

Q0

Enable display

Q1 Disable display

4

Table 1: AT and AT& Commands

Command Option Description

T T Ton e Di a l

V Result-Code Format

V0 Return Numeric Code (Short Form)

V1

X Select Call-Progress Result Codes to Return

X0 No Carrier; Connect. Modem reports lack of a carrier sig-

X1 No Carrier; Connect; Connect <rate>. Modem reports lack

This command instructs the modem to use DTMF tone
dialing.

Example: ATDT5554678.
This command uses DTMF tone Dialing to dial the number

5554678

Determines whether the modem sends short- or ling-form
messages to the communications application, indicating
the connection status, rate, and mode.

Return Text (Long Form)

nal; connection success/failure; modem dials without wait­ing for a dial tone

of a carrier signal; connection success/failure, and the
computer data rate established

X2 No Carrier; Connect; Connect <rate>; No Dial Tone.

Modem reports lack of a carrier signal; connection success/
failure; the computer data rate established; and the lack of
a dial tone

X3 No Carrier; Connect; Connect <rate>; Busy-tone. Modem

reports lack of a carrier signal; connection success/failure;
the computer data rate established; and the presence of a
busy signal

X4

No Carrier; Connect; Connect <rate>; No Dial-tone; Busy­tone. Modem reports lack of a carrier signal; connection
success/failure; the computer data rate established; the lack
of a dial tone; and the presence of a busy signal

Z Z Reset Modem Parameters to Default Configuration

&C DCD Control

&C0 Always Asserted

&C1

Asserted in Data Mode Only

&D DTR Control

Determines how modem responds to DTR signal from
DTE.

&D0 Ignore DTR

&D1 Enter Command mode when DTR transitions from

asserted to de-asserted

5

Table 1: AT and AT& Commands

Command Option Description

&D2 Disconnect call when DTR transitions from asserted to de-

&D3 Reset modem parameters to default configuration when

&F Initialize modem to default factory configuration.

&F90 Initialize modem to V.90 configuration.

&F92 Initialize modem to V.92 configuration.

&G Guard Tone

&G0

&G1 550 Hz Guard Tone

&G2 1800 Hz Guard Tone

&I Dial TX Level

&In Level n; n = 0 to 15. Default = 12

&I99 Automatic Level

&P Pulse Cycle

asserted

DTR transitions from asserted-to-de-asserted

Off

Note: the default value is 15 for Japan country setting.

Used when the modem is instructed to pulse dial.

&P0

40/60 Make/Break Ratio

&P1 33/67 Make/Break Ratio

Note: The default value is &P1 for Japan country setting.

&P2 38/62 Make/Break Ratio

&R CTS Control

&R0 Normal

&R1

Always On

&S DSR Control

&S0

Always On

&S1 On When Modem Recognizes Remote

&T Test

&T0 Terminate Test

&T1 Initiate Local Analog Loopback Test

Disconnect the telephone line from the modem line input
connector before using this command.

Set S-Register 46 = 23 (ATS46=23) before executing &T1.

&V Modem Status

&V0 Short Form Report

&V1 Current or Last Connection Report

&V2 Long Form Report

6

AT% (Percent)
and AT\
(Backslash)
Commands

The modem responds to the following AT% and AT\ command options.

The letters AT (or at) must precede all commands except A/ and +++.
Factory-default options are underlined.

Table 2: AT% (Percent) and AT\ (Backslash) Commands

Command Option Description

%B Maximum Modulation Rate

Sets the maximum rate that the modem uses when con­necting in a data modulation mode for performing func­tions such as Internet access or file transfer

%B0

%B1 300 bps

%B2 1.2 Kbps

%B3 2.4 Kbps

%B4 4.8 Kbps

%B6 9.6 Kbps

%B7 7.2 Kbps

%B8 12.0 Kbps

%B9 14.4 Kbps

%B11 16.8 Kbps

Maximum modem rate that the modem supports

%B12 19.2 Kbps

%B13 21.6 Kbps

%B14 24.0 Kbps

%B15 26.4 Kbps

%B16 28.8 Kbps

%B17 31.2 Kbps

%B18 33.6 Kbps

%B19 32.0 Kbps

%B20 34.0 Kbps

%B21 36.0 Kbps

%B22 38.0 Kbps

%B23 40.0 Kbps

%B24 42.0 Kbps

%B25 44.0 Kbps

%B26 46.0 Kbps

%B27 48.0 Kbps

%B28 50.0 Kbps

7

Table 2: AT% (Percent) and AT\ (Backslash) Commands

Command Option Description

%B29 52.0 Kbps

%B30 54.0 Kbps

%B31 56.0 Kbps

%B32 58.0 Kbps

%B33 60.0 Kbps

%B34 28000 bps

%B35 29333 bps

%B36 30666 bps

%B37 33333 bps

%B38 34666 bps

%B39 37333 bps

%B40 38666 bps

%B41 41333 bps

%B42 42666 bps

%B43 45333 bps

%B44 46666 bps

%B45 49333 bps

%B46 50666 bps

%B47 53333 bps

%B48 54666 bps

%C Data Compression (DC) Mode

Determines whether the modem implements methods of
increasing the effective data rate by reducing the number
of bits used to represent data

%C0 Disable Compression

%C1

Enable Compression

%D Disconnect Buffer Delay

Controls the delay after detection of a disconnect request
before the modem disconnects from the telephone line

%D0

Disable Delay

%Dn Delay for n Seconds (n = 1 to 255)

%L Minimum Modulation Rate

Sets the minimum rate that the modem uses when con­necting in a data modulation mode.

%L0

Minimum modem rate that the modem supports(300 bps)

%L1 300 bps

%L2 1.2 Kbps

8

Table 2: AT% (Percent) and AT\ (Backslash) Commands

Command Option Description

%L3 2.4 Kbps

%L4 4.8 Kbps

%L7 7.2 Kbps

%L6 9.6 Kbps

%L8 12.0 Kbps

%L9 14.4 Kbps

%L11 16.8 Kbps

%L12 19.2 Kbps

%L13 21.6 Kbps

%L14 24.0 Kbps

%L15 26.4 Kbps

%L16 28.8 Kbps

%L17 31.2 Kbps

%L18 33.6 Kbps

%L19 32.0 Kbps

%L20 34.0 Kbps

%L21 36.0 Kbps

%L22 38.0 Kbps

%L23 40.0 Kbps

%L24 42.0 Kbps

%L25 44.0 Kbps

%L26 46.0 Kbps

%L27 48.0 Kbps

%L28 50.0 Kbps

%L29 52.0 Kbps

%L30 54.0 Kbps

%L31 56.0 Kbps

%L32 58.0 Kbps

%L33 60.0 Kbps

%L34 28000 bps

%L35 29333 bps

%L36 30666 bps

%L37 33333 bps

%L38 34666 bps

%L39 37333 bps

9

Table 2: AT% (Percent) and AT\ (Backslash) Commands

Command Option Description

%L40 38666 bps

%L41 41333 bps

%L42 42666 bps

%L43 45333 bps

%L44 46666 bps

%L45 49333 bps

%L46 50666 bps

%L47 53333 bps

%L48 54666 bps

\K Break Handling Method

\K1

\K3 Non-destructive Expedited

\K5 Non-destructive Non-expedited

\N Error-Correction (EC) Mode

\N0 Normal

\N1 Direct

Destructive Expedited

\N4 LAP-M Only

\N6 Reliable

\N7

Auto-Reliable

\Q DTE Flow Control

\Q0 Disable

\Q1 XON/XOFF (software flow control)

\Q3

RTS/CTS (hardware flow control)

\T Disconnect on DTE Inactivity

\T0

Disable

\Tn Disconnect after n minutes of inactivity by the computer;

n = 0 to 255

\V Connect Message Format

Determines which messages the modem generates at con­nection time

\V0 Display DTE Rate

\V1 DTE with EC/DC

message

\V2 Display DCE Rate

\V3

DCE with EC/DC Message

10

\V4 DCE with Modulation & EC/DC Message

AT* (Asterisk)
Commands

The modem responds to the following AT* command options.

The letters AT (or at) must precede all commands except A/ and +++.
Factory-default options are underlined

Table 3: AT* (Asterisk) Commands

Command Option Description

*DD Dial Wait

*DD0

*DD1 3 Seconds

*DD2 4 Seconds

*DD3 5 Seconds

*DD4 12 Seconds

*DD5 15 Seconds

*DD6 20 Seconds

Specifies the time interval to wait when the modem
encounters a W or w while processing a dial string

2 Seconds

Note: the default value is *DD2 for Japan country set­ting.

*DD7 30 Seconds

*DD8 40 Seconds

*LS Low-Speed Operation Protocol

Lets you select a communications protocol to commu­nicate with very low-speed or older modems.

*LS0 Bell 103

*LS1 ITU-T V.21 (international standard)

*LS2

*MM Modulation Mode

*MM0 V.34 Auto Modulation

*MM1 V.21

*MM2 Bell 103

*MM4 V.22/Bell 212

*MM5 V.22bis

*MM6 V.23

*MM10 V.32 Only

*MM11 V.32 bis

*MM12 V.34 Only

*MM13 K56flex™ Only

Bell 103 or ITU-T V.21 (Auto determination)

11