Copyright: T0068-02A. C.A -B060. Current for Rel. 3.0.  ©Motorola ING, Inc. 1998, 1999
Citation: ©Motorola ING, Inc. 1998, 1999


Introduction

Thank you for using the SM56 Modem. The modem supports V.90 and K56flex™ connections, providing high-speed communications between your personal computer and a remote location. You can:

•	Receive data at up to 56.0 KBPS in V.90 or K56flex™ mode, for fast Internet access

•	Use your computer to send and receive faxes, at up to 14.4 KBPS

•	Use your computer as a Video Phone, to place and receive Video Phone calls
(Data/Fax/Voice modem only. Data/Fax/TAM and Data/Fax modems do not support this.)

•	Use your computer as a speakerphone, to place and receive voice calls
(Data/Fax/Voice modem only. Data/Fax/TAM and Data/Fax modems do not support this.)

•	Use your computer as a telephone answering machine
(PCI modems and ISA Data/Fax/Voice modems only.)

Key Features

The modem supports:
• The V.90 56K standard, for maximum ISP interoperability
•  K56flex™ technology, for the highest Internet download speeds from participating ISPs
• The V.80 interface to H.234-compliant Video Phone applications
• The V.34, V.32bis, V.32, V.23, V.22bis, V.22, V.21, Bell 212A, and Bell 103 modulation standards
• Fax Class 1 error-correction mode; and is Fax Class 1 -compliant
• V.17, V.21, V.29, V.27ter Group III Fax modes
• V.42, LAP-M, and MNP 2-4 error-correction protocols
• V.42bis and MNP 5 data-compression protocols
• DTE rates from 300 BPS to 115.2 KBPS

The modem is designed with easy upgrades in mind.  You can upgrade the modem software with a simple Internet download to help keep up with the rapid changes in features and supported communications rates.  In many cases, no new hardware is required. Contact your modem supplier for details.


Technical Support

For telephone technical support, contact your personal computer or direct modem supplier.

If you haven’t checked the Troubleshooting section, do that first.


Telephone Connectors

Most modems have two RJ-11 telephone connectors, LINE [image] and PHONE [image].

To set up the modem, connect a telephone cable from a telephone service outlet to the LINE connector. In countries that require it, an adapter cable is included with the modem to connect it to the telephone line.

Optionally, connect a telephone set to the PHONE connector. A connected telephone operates normally, even if the computer is powered off. Note: the modem may disconnect the handset during a call in voice, data, and fax modes.

WARNING

To avoid the risk of electric shock, disconnect the telephone cable from the wall socket before disconnecting the cable from the modem.


Control Panel Application

The modem comes with a control panel application that lets you set modem options, view modem status, and access the Help topics.

To access the modem control panel:

1.	On the desktop, select Start; then Settings; then Control Panel.

2.	Double-click the SM56 Modem icon. The Control Panel is active.


Installing or Re-Installing the Modem

The SM56Modem is typically pre-installed on your computer, but you can re-install it.

CAUTION

 Use only one modem card in a computer.

Requirements

The modem operates on a personal computer equipped with the following:

•	Windows 95, Windows 98, or Windows NT 4.0 (or later) operating system

•	Any of the following processor/cache memory configurations:

- 150 MHz Pentium® or faster CPU (200 MHz, recommended for V.90 operation)

- 233 MHz AMD K6® or faster CPU with 256K L2 cache memory

- 266 MHz Cyrix® 6X86MX or faster CPU with 256K L2 cache memory

- 266 MHz Intel® Celeron or faster CPU

•	8 MB hard disk space

•	16 MB RAM - for Windows 95 or Windows 98

•	32 MB RAM - for Windows NT (Note: Windows NT device drivers are different from those for Windows 95 and Windows 98)

•	For ISA modem:

- One vacant 8-bit ISA slot

- One vacant IRQ: 3, 4, 5, 6, 7, or 9

•	For PCI modem:

- One vacant 32-bit PCI slot

- One available IRQ: 3 through 15

•	For Data/Fax/Voice modem, a compatible sound card

Installing the Modem

Note: If you un-install the Windows NT operating system, you must re-install the ISA Plug and Play service before you re-install the ISA modem. To do so:

1.	Open the Control Panel, then Services.

2.	Install the isapnp.sys file.

3.	Proceed with the instructions below

Step	Stage
1.	Print this Help topic so that you can refer to the hard copy.
2.	Power down the computer. Unplug the power cable.
3.	Open the computer and insert the line interface card into an empty PCI or ISA slot, depending on your line-interface card type.
4.	If using the SM56 Data/Fax/Voice modem: connect the sound subsystem interface cable to the modem card’s 4-pin connector and to the sound subsystem’s interface connector that provides analog microphone and speaker I/O.  The pin assignments are as follows (Pin 1 is the rightmost pin): Pin Signal Wire Color 1 Ground No wire 2 Microphone In Red 3 Ground Black 4 Speaker Out White Note: the SM56 Data/Fax modem does not support a sound subsystem.
5.	Connect the modem to an analog telephone line jack, using the telephone cable provided.
6.	Restart the computer.  Windows detects the modem Plug and Play hardware and installs it. The New Hardware Found dialog box appears.
7.	Select Driver From Disk Provided by Hardware Manufacturer. Select OK.
8.	Insert the modem installation media into a drive. Select OK.
9.	On some computers, Windows performs this step automatically. If yours does not: Select Motorola SM56 Modem.  Select Next. The computer continues its restart procedure. When restart is complete, the SM56 Modem Setup procedure runs automatically. Important: Windows NT prompts you to restart the computer before the SM56 Modem Setup procedure begins. (This starts the device drivers.) The Setup procedure then runs automatically.
10.	Follow the Installation Wizard instructions. • If using an ISA modem: a) Select the country that matches your country-specific modem hardware component.  b) SM56 Data/Fax/Voice modems: select the microphone gain so that the sum of your sound card's microphone gain and the modem microphone gain is as close as possible to 28 dB. Do not exceed 32 dB.  (SM56 Data/Fax modem does not support the microphone.) • If using a PCI modem: optionally, change the default country, language, and microphone gain options after installation is complete. Refer to Step 12.
11.	When the SM56 Modem Setup procedure is complete, a dialog box requesting a Restart appears. To enable the use of Windows 95 and Windows 98 DOS box applications, select Yes; otherwise, select No.
12.	If using a PCI modem: optionally, open the SM56 Control Panel and select  country, language, and microphone gain options.
12.	In each communications application on your computer, select the SM56 modem.


Software Updates

You can upgrade the software for faster rates and new features as they become available.  In most cases, new hardware is not needed.

Upgrading Modem Software

Upgrade the modem to a newer version as follows.

1.	Obtain the latest software version.

2.	Run the setup.exe program.

Recovering from an Unsuccessful Upgrade

If, after an upgrade, you have problems with the new driver, you can restore your previous software installation as follows. Perform all of the following steps.

1.	Open the Control Panel. Select Add/Remove programs.

2.	If SM56 Modem is in the list of installed programs, click on it, then click Add/Remove to run the un-install program.

3.	Open the windows\inf\other folder. Delete all motoro*.inf files that are listed there.

4.	Open the Control Panel. If the modem icon appears:

a)	Close the Control Panel.

b)	Open the windows\system folder.

c)	Delete the mca.cpl file.

5.	Open the windows\system.ini file. If the motvcd.vxd file is there, change it to *vcd.

6.	Restart the computer.

7.	The New Hardware Found window displays.  Enter or browse to: windows\program files\motbak95.

8.	Perform the regular installation procedure .


Operating System Upgrades

The modem is preset to work with the operating system installed on your computer. If you change your operating system (for example, from Windows 95 to Windows 98, or vice versa), new modem software is required.

To upgrade the modem for a different operating system:

1.	Obtain the appropriate modem software from your personal computer or direct modem supplier.

2.	Create a modem-software installation disk for the new operating system.

3.	Perform the operating-system upgrade.

4.	Install the new modem software.

Upgrading from Windows 95 to Windows 98 or Windows NT

Windows 98

The SM56 Windows 95 software operates under Windows 98. This means that you can upgrade to Windows 98 without changing SM56 modem software.

However, if you upgrade to Windows 98, the following message appears when Windows restarts after the operating-system upgrade:

Duplicated device: vcd

Correct the error as follows.

1.	Edit the SYSTEM.INI file, and locate the line: Device = *vcd

2.	Delete this line, or change it to a comment.

3.	Save the modified SYSTEM.INI file.

4.	Restart Windows 98. The error message does not appear.

Windows NT

The SM56 Windows 95 software modem does not operate under Windows NT. When upgrading, install the new NT operating system, then install the SM56 Windows NT software.


Application Compatibility

The modem supports communications applications that run:

•	Under Windows 95 or Windows 98

•	Under Windows NT 4.0 and later

•	In the Windows 95/Windows 98 DOS box (ISA modem only)


Fax Service Class 1

The modem supports Group 3 Facsimile Service Class 1, as defined in the EIA/TIA-578-A specification. With fax software, you can use your computer and the modem to send and receive fax transmissions. If you are having trouble with faxing, see the section on AT+ commands, which control fax operation.


Caller ID

The modem can detect the information generated by the Caller ID service feature, which is available from many telephone companies. Check with your telephone company for details.

With Caller ID, the caller’s telephone number and the date and time of the call are transmitted over the telephone line between the first and second ring. In some areas, further data, such as the caller’s name, is available with Enhanced Caller ID.

The modem transfers Caller ID data to the communications application. You may configure the application to track or process the data.

If you subscribe to Caller ID, but it is not working, refer to the Troubleshooting section.

The caller can prevent Caller ID information from being transmitted.


Distinctive Ring

The modem can detect the ring patterns that are generated by the Distinctive Ring service feature, which is available from many telephone companies. Check with your telephone company for details.

With Distinctive Ring, multiple telephone numbers are assigned to your telephone line. Each number, when called, generates a different ring pattern. This allows you to use one phone line for all types of calls—voice, data, and fax.

The modem transfers the Distinctive Ring data to the communications application. Thus the modem can route calls to the appropriate application.  For example, when a caller dials your fax number, the modem activates your fax application.


Telephone Answering Machine Mode

This information applies to the SM56 Data/Fax/Voice and Data/Fax/TAM modems.

You can use your computer and modem as an answering machine, with the answering-machine software optionally bundled with your computer. The answering machine function does not operate when the computer is powered off.

You can record announcements with the computer’s microphone (see your answering-machine documentation for instructions), and you can listen to announcements and messages through the computer’s speakers.

Note: You cannot listen to answering-machine messages through the optional externally-connected telephone handset.


Retrieving Answering-Machine Messages From a Remote Location

This information applies only to the SM56 Data/Fax/Voice and Data/Fax/TAM modems.

The modem detects DTMF tones (which are generated when buttons are pressed on the telephone) from a remote telephone. If your answering-machine software allows remote message retrieval, you can use the modem for this purpose.

For details on retrieving messages, see your answering-machine software documentation.


Dial Modifiers

The modem supports the following dial modifier characters. Modifiers are used in a dial string to let the modem handle situations such as the use of a calling card, accessing outside lines when located within a PBX system, and using pulse dialing.

This Character:	Has This Name:	And Causes the Modem To:
@	Quiet Answer	Wait for one or more rings, then five seconds of silence; then proceed with dial string
H	Disconnect	Disconnect from the telephone line.
K k , <	Pause Delay	Pause; the default time is three seconds
P	Pulse Dial	Use pulse dialing
R	Reverse	Enter Answer mode immediately after dialing; use when the remote modem is originate-only
T	Tone Dial	Use tone dialing
W w	Dial Wait	Pause until it detects a dial tone
;	Command Mode	Return to command mode after dialing, without breaking the connection established. Permits transmission of numbers as tones.
! &	Flash	Flash hook. Enables PBX dialing features


Result Codes and Connect Messages

The modem sends messages to the computer that indicate connection status. The communications application uses this information to track the progress of a connection and take the appropriate actions.

Message content and format is determined by:

•	The Result Code Display (ATQ ) parameter option, which enables result codes to display

•	The Result Code Format (ATV ) parameter option, which determines the result message format (long-form text messages or short-form numeric codes)

•	The Call Progress Reporting (ATX ) parameter option, which determines the types of messages displayed

•	The Connect Message (AT\V ) parameter option, which determines the types of information displayed within a connect message

The Result Code Display parameter must be enabled (ATQ=1) for the modem to generate any messages.

The following numeric codes or text messages are sent, according to the Call Progress Reporting (ATX) option.  The connect messages shown below can be generated when the Connect Message parameter (AT\V) is set to a Rate-Only option (AT\V0 or AT\V2).

Numeric Code	Text Message	Call Progress Reporting (ATX) Option
0	OK	0,1,2,3, or 4
1	CONNECT 75	0
Note: If Call Progress=0, the receipt of numeric code 1 indicates only that a connection has been made. If Call Progress=1, 2, 3, or 4, the receipt of numeric code 1 indicates a connection was made at 75 BPS.

2	RING	0, 1, 2, 3,  or 4
3	NO CARRIER	0, 1, 2, 3, or 4
4	ERROR	0, 1, 2, 3, or 4
5	CONNECT 1200	1, 2, 3, or 4
6	NO DIALTONE	2 or 4
7	BUSY	3 or 4
8	NO ANSWER	0, 1, 2, 3, or 4
10	CONNECT 2400	1, 2, 3, or 4
11	CONNECT 4800	1, 2, 3, or 4
12	CONNECT 9600	1, 2, 3, or 4
13	CONNECT 600	1, 2, 3, or 4
20	CONNECT 300	1, 2, 3, or 4
22	CONNECT 7200	1, 2, 3, or 4
23	CONNECT 12000	1, 2, 3, or 4
24	CONNECT 14400	1, 2, 3, or 4
25	CONNECT 16800	1, 2, 3, or 4
26	CONNECT 19200	1, 2, 3, or 4
27	CONNECT 21600	1, 2, 3, or 4
28	CONNECT 24000	1, 2, 3, or 4
29	CONNECT 26400	1, 2, 3, or 4
30	CONNECT 28800	1, 2, 3, or 4
31	CONNECT 31200	1, 2, 3, or 4
32	CONNECT 33600	1, 2, 3, or 4
34	CONNECT 38400	1, 2, 3, or 4
35	CONNECT 57600	1, 2, 3, or 4
36	CONNECT 115200	1, 2, 3, or 4
37	CONNECT 32000	1, 2, 3, or 4
38	CONNECT 34000	1, 2, 3, or 4
39	CONNECT 36000	1, 2, 3, or 4
40	CONNECT 38000	1, 2, 3, or 4
41	CONNECT 40000	1, 2, 3, or 4
42	CONNECT 42000	1, 2, 3, or 4
44	CONNECT 44000	1, 2, 3, or 4
46	CONNECT 46000	1, 2, 3, or 4
48	CONNECT 48000	1, 2, 3, or 4
50	CONNECT 50000	1, 2, 3, or 4
52	CONNECT 52000	1, 2, 3, or 4
54	CONNECT 54000	1, 2, 3, or 4
56	CONNECT 56000	1, 2, 3, or 4
58	CONNECT 58000	1, 2, 3, or 4
60	CONNECT 60000	1, 2, 3, or 4
61	CONNECT 28000	1, 2, 3, or 4
62	CONNECT 29333	1, 2, 3, or 4
63	CONNECT 30666	1, 2, 3, or 4
64	CONNECT 33333	1, 2, 3, or 4
65	CONNECT 34666	1, 2, 3, or 4
66	CONNECT 37333	1, 2, 3, or 4
67	CONNECT 38666	1, 2, 3, or 4
68	CONNECT 41333	1, 2, 3, or 4
69	CONNECT 42666	1, 2, 3, or 4
70	CONNECT 45333	1, 2, 3, or 4
71	CONNECT 46666	1, 2, 3, or 4
72	CONNECT 49333	1, 2, 3, or 4
73	CONNECT 50666	1, 2, 3, or 4
74	CONNECT 53333	1, 2, 3, or 4
75	CONNECT 54666	1, 2, 3, or 4
Rates are bits/second

The Connect Message can also be configured to indicate such information as:

•	The modem modulation mode

•	The error-correction type and data-compression method used for a connection

When the Call Progress Reporting parameter (ATX) is set to a non-zero option, the types of connect messages that can be sent, based on the Connect Message (AT\V) option, are as follows.  There are no numeric codes for these messages.

Connect Message (AT\V) Option	Text Message
1	CONNECT rate
	CONNECT rate/ec
	CONNECT rate/ec/dc
3	CONNECT rate
	CONNECT rate/ec
	CONNECT rate/ec/dc
4	CONNECT rate/mode
	CONNECT rate/mode/ec
	CONNECT rate/mode/ec/dc
	CONNECT rate/rate/mode
	CONNECT rate/rate/mode/ec
	CONNECT rate/rate/mode/ec/dc
Where rate = one of 300, 1200, 2400, 4800, 7200, 9600, 12000, 14400, 16800, 19200, 21600, 24000, 26400, 28800, 38400, 57600, 115200 BPS

Where ec = one of LAPM, MNP

Where dc = one of V42BIS, MNP5

Where mode = one of V34, V32BIS, V32, V23, V22BIS, V21, K56flex™ B212, B103

Rates are in bits/second

When AT\V is set to 0 or 1, the connect message shows the rate at which the computer communicates with the modem—the DTE rate.

When AT\V = 2, 3 or 4, the connect message shows the rate at which the modem communicates with the remote modem—the DCE rate.  An asymmetric connection occurs when the receive rate is different from the transmit rate.  In this case, the receive rate is shown (followed by the transmit rate, if AT\V = 4).

Example:

Text Message	Meaning
CONNECT 28800/26400/V34/LAPM/V42BIS	AT\V=4 and the modem makes a V.34 connection at a receive rate of 28800 and a transmit rate of 26400 using LAPM error correction and V.42bis data compression
Other Connect Messages

The modem can generate the following messages when the corresponding options are enabled.

If This Option is Enabled…	The Modem Can Generate This Message:	Example:
+ILRR	+ILRR: <rate>[,<rx_rate>]	+ILRR:19200
+MR	+MCR:<carrier> +MRR:<rate>[,<rx_rate>]	+MCR:V32B +MRR:33600 )
	Note: <carrier> values are the same as the first parameter of the  AT+MS  command
AT+ER	+ER:NONE +ER:LAPM +ER:ALT
T+DR	+DR:NONE +DR:V42B +DR:V42B RD +DR:V42B TD
Other Messages

The modem can generate the following messages.

Numeric Code	Text Message	Meaning
+F4	+FCERROR	Invalid fax tone or data carrier detected; modem returned to command state.
ERRM=ICLID_202	ERRM=ICLID_202	Caller ID information from the phone company was corrupted and therefore could not be provided.


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.  One such application is HyperTerminal, which is present on computers that have Windows.

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. However, some commands must occur at the beginning or end of the command line.


+++ (Plus-Plus-Plus) Commands

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.

CAUTION

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


AT and AT& (Ampersand) 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.

Command	Option	Description
A	(none)	Answer incoming call
A/	(none)	Repeat Last Command Re-issues the previous command to the modem. (Do not press Return; the command executes as soon as the / is pressed.)
D	(none)	Dial a Number 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 voice mode, the modem must be forced to blind-dial after dial-tone detection.
E		Echo Async (Keyboard) Input to Terminal 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.
	E0	Disable
	E1	Enable
H		Hook
	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	“255”
	I2	“OK”
	I3	Software Version
	I4	“OK”
	I5	Disconnect Reason
	I6	Country Code
	I7	Product Code
L		Speaker Volume This parameter determines the volume, for call-progress monitor only, of sounds such as dialing, ringing, busy, negotiation.
	L0, L1	Low
	L2	Medium
	L3	High
M		Speaker Control
	M0	Off
	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
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; ATX.
	Q0	Enable display
	Q1	Disable display
T	T	Tone Dial This command instructs the modem to use DTMF tone dialing.
V		Result-Code Format Determines whether the modem sends short- or long-form messages to the communications application, indicating the connection status, rate, and mode.
	V0	Return Numeric Code (Short Form)
	V1	Return Text  (Long Form)
X		Select Call-Progress Result Codes to Return
	X0	No Carrier; Connect. Modem reports lack of a carrier signal; connection success/failure; modem dials without waiting for a dial tone
	X1	No Carrier; Connect; Connect <rate>. Modem reports lack 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; Busy-tone. 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
	&D2	Disconnect call when DTR transitions from asserted to de-asserted
	&D3	Reset modem parameters to default configuration when DTR transitions from asserted-to-de-asserted
&G		Guard Tone
	&G0	Off
	&G1	550 Hz Guard Tone
	&G2	1800 Hz Guard Tone
&I		Dial TX Level
	&In	Level n; n = 0 to 15. Default = 9
	&I99	Automatic Level
&P		Pulse Cycle Used when the modem is instructed to pulse dial.
	&P0	40/60 Make/Break Ratio
	&P1	33/67 Make/Break Ratio
	&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.
&TD		Dial TX Level
	&TDn	Level n; n = 0 to 15
	&TD99	Automatic Level
&V		Modem Status
	&V0	Short Form Report
	&V1	Current or Last Connection Report
	&V2	Long Form Report


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.

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	Maximum modem rate that the modem supports
	%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
	%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
	%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
	%L1	300 BPS
	%L2	1.2 KBPS
	%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
	%L40	38666 BPS
	%L41	41333 BPS
	%L42	42666 BPS
	%L43	60.0 KBPS
	%L44	46666 BPS
	%L45	49333 BPS
	%L46	50666 BPS
	%L47	53333 BPS
	%L48	54666 BPS
\K		Break Handling Method
	\K1	Destructive Expedited
	\K3	Non-destructive Expedited
	\K5	Non-destructive Non-expedited
\N		Error-Correction (EC) Mode
	\N0	Normal
	\N1	Direct
	\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
	\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.

Command	Option	Description
*DD		Dial Wait Specifies the time interval to wait when the modem encounters a W or w while processing a dial string
	*DD0	2 Seconds
	*DD1	3 Seconds
	*DD2	4 Seconds
	*DD3	6 Seconds
	*DD4	12 Seconds
	*DD5	15 Seconds
	*DD6	20 Seconds
	*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	Bell 103 or ITU-T V.21 (Auto determination)
*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
	*MM14	K56flex™  Auto-modulation
	*MM15	V.90 Only
	*MM16	V.90 Auto


AT+ (Plus) 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.

AT commands that begin with:

•	+D control data compression

•	+F control fax application operation

•	+V control voice application operation

These commands are primarily used by software applications.

Command	Option	Description
+A8E		V.8 Configuration
	+A8=a,b,c,d
	a options:	Specifies V.8 origination negotiation options
	0	Disable
	1	Enable computer-controlled V.8 origination negotiation
	6	Enable computer-controlled V.8 origination negotiation with +A8x indications
	b options:	Specifies V.8 answer negotiation options
	0	Disable
	1	Enable computer-controlled V.8 answer negotiation
	5	Enable computer-controlled V.8 answer negotiation with +A8x indications
	c options:	Specifies the V.8 CI Signal Call Function Octet options
	00h - FFh, default=00h
	d options:	Specifies V.8 control options
	0	Disabled
	1	Enabled, modem control
	2	Enabled, computer control
+A8T		V.8bis Signal and Message Control
	+A8T=a,b,c,d,e,f
	a options:	Specifies V.8bis Signal to Transmit
	0	None
	1	Initiating MRe
	2	Initiating MRd
	3	Initiating Cre, low power
	4	Initiating Cre, high power
	5	Initiating Crd
	6	Initiating Esi
	7	Responding MRd, low power
	8	Responding MRd, high power
	9	Responding CRd
	10	Responding ESr
	b options:	Specifies V.8bis Transmit Message 1
		hexadecimal octet coded string
	c options:	Specifies V.8bis Transmit Message 2
		hexadecimal octet coded string
	d options:	Specifies V.8bis signal detection
	0	Enable detection of initiating V.8bis signal
	1	Enable detection of responding V.8bis signal
	2	Enable detection of both V.8bis signals
	e options:	Specifies V.8bis message detection
	0	Disable detection
	1	Enable detection
	f options:	Specifies the V.8bis message delay
	0	No delay between transmitting signal and messages
	1	1.5 second delay between transmitting signal and any messages
+DR		Data Compression (DC) Reporting
	+DR=0	Disabled
	+DR=1	Enabled
+DS		Data Compression Control
	+DS=p,q,r,s
	p options:	Specifies compression on/off direction
	0	No compression
	1	Tx direction only
	2	Rx direction only
	3	Both directions; accept any direction
	q options:	Specifies negotiation
	0	Do not disconnect if V.42bis is not negotiated per Direction option
	1	Disconnect if V.42bis is not negotiated per Direction option
	r options:	Specifies maximum dictionary size
	512 - 65535	Default=2048
	s options:	Specifies maximum string size
	6 - 250	Default = 32
+EB		Break Handling Control
	+EB=p,q r
	p options:	Specifies break selection
	0	Ignore break
	1	Non-expedited, non-destructive
	2	Expedited, non-destructive
	3	Expedited, destructive
	q options:	Specifies break length control
	0	Transmission of V.42 L-SIGNAL does not indicate break length
	1	Transmission of V.42 L-SIGNAL indicates break length
	r options:	Specifies the default break-length
	0	Break is not transmitted to the computer
	1 - 254, default=100	Break length, in 0.01-second increments
+ER		Error-Control Reporting
	+ER=a
	a options:	Specifies the modem’s error-control reporting activity
	0	Disabled
	1	Enabled: modem issues one of the following messages to the computer, before it issues a connect message, the specifies the Error Correction protocol negotiated: +ER:NONE +ER:LAPM +ER:ALT
+ES		Error-Correction (EC) Control
	+ES=p,q r
	p options:	Specifies the originate-modem’s Request Error Correction mode
	0	Direct mode
	1	Normal mode
	2	LAP-M Only
	3	LAP-M or MNP
	4	MNP Only
	6	Initiate Sync Access modem when connection is established
	q options:	Specifies the answer-modem’s Fallback Error Correction mode
	0	EC optional, fallback to Normal mode
	1	EC optional, fallback to Direct mode
	2	EC required (LAP-M or MNP)
	3	EC required (LAP-M only)
	4	EC required (MNP only)
	r options:	Specifies the originate-modem’s Fallback Error Correction mode
	0	Direct mode
	1	Normal mode
	2	EC optional, fallback to Normal mode
	3	EC optional, fallback to Direct mode
	4	EC required (LAP-M or MNP)
	5	EC required (LAP-M only)
	6	EC required (MNP only)
	8	Initiate synchronous access mode when connected
+ESA		Synchronous Access Mode Configuration
	+ESA=a,b,c,d,e,f
	a options:	Specifies the Idle in Transparent sub-mode
	0	Computer transmits 8 bit SYN sequence on idle.  Computer does not hunt for synchronization sequence
	b options:	Specifies the Idle in Framed sub-mode
	0	Computer transmits HDLC flags on idle
	c options:	Specifies under-run and over-run in Framed sub-mode
	0	Computer transmits Abort on an under-run within a frame
	1	Computer transmits a Flag on an under-run within a frame, and notifies the modem of any under-run or over-run
	d options	Specifies half-duplex control. Not available.
	e options	Specifies the Cyclic Response Code (CRC) type
	0	Disabled. No CRC generation or checking.
	1	In Framed sub-mode, the computer generates 16-bit CRC in the Transmit direction and the modem generates 16-bit CRC on the Receive direction.
	f options:	Specifies Non-Return to Zero (NRZI) options
	0	NRZI encoding and decoding are disabled.
+ETBM		Disconnect Buffer Delay Control
	+ETBM=p,q r
	p options:	Specifies the disconnect buffer delay with pending transmit data
	0	Discard buffered data and disconnect
	1	Attempt to transmit until all data is delivered, then disconnect. Ignore timer.
	2	Attempt to transmit until all data is delivered or timer expires.
	q options:	Specifies the disconnect buffer delay with pending receive data
	0	Discard buffered data and disconnect
	1	Attempt to transmit until all data is delivered, then disconnect. Ignore timer.
	2	Attempt to transmit until all data is delivered or timer expires.
	r options: 1 - 255, default=0	Disconnect buffer delay  timer, in 1-second increments
+FCLASS		Fax/Modem Mode
	+FCLASS=0	Modem Mode
	+FCLASS=1	Fax Class 1
	+FCLASS=8	Voice Mode
+FLO		Fax Flow Control
	+FLO=0	None
	+FLO=1	XON/XOFF
	+FLO=2	RTS/CTS
+FMI?		Report Manufacturer ID
+FMM?		Report Modem ID
+FMR?		Report Revision Level
+FRH		Receive High-Level Data Link Control (HDLC) Mode Sets mode and transmit/receive rate for faxes
	+FRH=3	V.21 at 300 BPS
	+FRH=24	V.27ter at 2.4 KBPS
	+FRH=48	V.27ter at 4.8 KBPS
	+FRH=72	V.27ter at 7.2 KBPS
	+FRH=73	V.27ter at 7.2 KBPS with long train time
	+FRH=74	V.27ter at 7.2 KBPS with short train time
	+FRH=96	V.29 at 9.6 KBPS
	+FRH=97	V.17 at 9.6 KBPS with long train time
	+FRH=98	V.17 at 9.6 KBPS with short train time
	+FRH=121	V.17 at 12.0 KBPS with long train time
	+FRH=122	V.17 at 12.0 KBPS with short train time
	+FRH=145	V.17 at 14.4 KBPS with long train time
	+FRH=146	V.17 at 14.4 KBPS with short train time
+FRM	+FRM	Receive Mode Sets the modulation mode for receiving faxes
	+FRMm	Use mode m; see mode options for +FRH, above.
+FRS		Wait for Silence
	+FRSn	Wait (n*10) ms; n=0 to 255
+FTH	+FTH	Transmit High-Level Data Link Control (HDLC) Mode
	+FTHmode	Use mode mode; see options for +FRH, above.
+FTM	+FTM	Transmit Mode Sets the modulation mode for transmitting faxes
	+FTMmode	Use mode mode; see options for +FRH, above.
+FTS		Pause Transmission
	+FTSn	Pause transmission for (n*10) ms; n=0 to 255
+GCAP		Report Capabilities
	+GCAP	Display modem capabilities
+GCI		Country of Installation
	+GCI=a	Set country in which modem is installed
	00	Japan
	04	Germany
	09	Australia
	0A	Austria
	0F	Belgium
	16	Brazil
	20	Canada
	2E	Czech Republic
	31	Denmark
	3C	Finland
	3D	France
	42	Germany
	50	Hong Kong
	57	Ireland
	58	Israel
	59	Italy
	6C	Malaysia
	7B	Netherlands
	82	Norway
	8B	Portugal
	8C	Singapore
	9F	South Africa
	A0	Spain
	A5	Sweden
	A6	Switzerland
	A9	Thailand
	AE	Turkey
	B4	United Kingdom
	B5	USA
+GMI		Request Manufacturer ID
	+GMI?	Display modem-manufacturer information
+GMM		Request Model ID
	+GMM?	Display modem-model information
+GMR		Request Software Revision Number
	+GMR?	Display modem-software revision number
+IFC		Flow Control
	+IFC=p,q
	p options:	Specifies the computer’s flow control method for data passing to the modem (downstream)
	0	None
	1	XON/XOFF flow control, no pass-through
	2	RTS flow control
	3	XON/XOFF flow control, with pass-through
	q options:	Specifies the modem’s flow control method for data passing from the modem (upstream)
	0	None
	1	XON/XOFF flow control, no pass-through
	2	CTS flow control
+ILRR		Computer’s Local Rate Reporting
	+ILRR=0	Disabled
	+ILRR=1	Enabled
+ITF		Transmit Flow Control Thresholds (V.80)
	+ITF=a,b
	a options:	Specifies the threshold, in octets, at which the modem turns transmit flow-control off
	0-2047 default=255
	b options:	Specifies the threshold, in octets, at which the modem turns transmit flow-control on
	0-2047 default=255
+MR		Modulation Mode Reporting
	+MR=0	Disabled
	+MR=1	Enabled
+MS		Modulation Control
	+MS=p,q,r,s,t,u
	p options:	Specifies the modulation mode
	V21	V.21
	V22	V.22
	V22B	V.22bis
	V23C	V.23c
	V32	V.32
	V32B	V.32bis
	V34	V.34
	K56FLEX	K56flex™
	V90	V.90
	q options:	Specifies the Automode option
	0	Disabled
	1	Enabled
	r options:	Specifies the minimum data rate in the Tx direction
	0	Use the minimum rate of the specified modulation mode
	300 - 33600	BPS
	s options:	Specifies the maximum data rate in the Tx direction
	0	Use the maximum rate of the specified modulation mode
	300 - 33600	BPS
	t options:	Specifies the minimum data rate in the Rx direction
	0	Use the minimum rate of the specified modulation mode
	300 - 60000	BPS
	u options:	Specifies the maximum data rate in the Rx direction
	0	Use the maximum rate of the specified modulation mode
	300 - 60000	BPS
+VCID		Caller ID Control
		This option takes effect only where the function is supported.
	+VCID=0	Disable
	+VCID=1	Enable
	+VCID=?	Display Caller ID Status (returns 0 or 1)
+VDR		Distinctive Ring Control and Report
		This option takes effect only where the function is supported.
	+VDR=m,n	Note: If Distinctive Ring is enabled, the first ring reported by the modem may be incorrect.
	m options:	Specifies control
	0	Disable
	1	Enable
	n options:	Specifies reporting
	0	Produce DROFF/DRON report, no RING
	1-255	Produce DROFF/DRON, followed by RING after delay of n/10 seconds
+VEM		Event Reporting and Masking Control
		Bit-mapped event control mask. See Event Reporting Word.
+VGR		Receive Gain
	0	Automatic Gain Control
	1-255	Relative range, where 128 indicates a nominal value.
+VGT		Transmit Volume
	1-255	Relative range, where 128 indicates a nominal value.
+VIP		Initialize Voice Parameters
		Set voice parameters to factory-default options.
+VLS		Select Analog Source and Destination
	0	DCE (modem) on-hook
	1	DCE off-hook, DCE connected to telco
	8	DCE on-hook, DCE connected to speaker
	9	speakerphone with mute enabled
	11	DCE on-hook DCE connected to microphone
	13	DCE off-hook, DCE connected to telco, speaker, and microphone (speakerphone)
+VNH		Automatic Hang-up Control
	+VNH=0	Retain automatic hang-ups
	+VNH=1	Disable DCE-initiated automatic hang-ups
	+VNH=2	Disable all Automatic hang-ups
+VPR		Voice DTE-DCE Rate
	+VPR=0	Autobaud
+VRA		Ringback Gone Timer If, after detecting ringback, no further ringbacks are detected after n/10 seconds, operate as if the remote device answered the call.
	+VRA=n	If no ringback is received, after n/10 seconds, assume that the remote device has answered the call; n = 0-255
+VRN		Ringback Never Occurred
	+VRN=n	After n/10 seconds, operate as if ringback had never occurred; n = 0-255
+VRX		Voice Receive Mode Determines whether the modem generates a periodic beep, audible to both parties on the speakerphone, indicating that the call is being recorded.  Notes: the speakerphone state does not have to be reset after recording to the line or playing a message to the line. The baud rate is not set before the StartPlay and StartRecord commands. The baud rate is not reset after the StopPlay and StopRecord commands.
	+VRX or +VRX=0	Produce Periodic DCE Tone While Recording
	+VRX=1	Disable Periodic DCE Tone Production During Recording
+VSD		Remote Silence-Detection Properties
	+VSD=m,n	Used in answering-machine mode. Specifies the volume and duration thresholds that determine whether the remote device has hung up.
	m options:	Specifies the silence-detection level
	0	Use current +VSM value; or, if current +VSM value is 0, use 128.
	127	Low Threshold (most sensitive)
	128	Medium Threshold
	129	High Threshold (least sensitive)
	n options:	Specifies the silence-detection duration
	0	Disable
	1-255	Detect n/10 seconds silence; n = 0-255
	60	Default =6 seconds
+VSM		Speech Compression Properties
	+VSM=m,n,p,q	Specifies the voice compression parameters
	m options:	Specifies the compression method
	128	PCM
	129	ADPCM
	n options	Specifies the sampling rate to determine whether to compress
	8000	8000 Hz
	p options:	Parameter p specifies compression and expansion of periods of silence. These parameters are not implemented in Release 1.0. You may leave them blank or enter the value 0.
	0	Disable
	q options:	Parameter q specifies compression and expansion of periods of silence. These parameters are not implemented in Release 1.0. You may leave them blank or enter the value 0.
	0	Disable
+VTD		DTMF Tone Duration
	+VTDn	Generate tone for n/100 seconds; n = 0-255. Default=100.
+VTS		DTMF Tone Generation Properties
		+VTS accepts multiple options, separated by commas, of any of the following types. Use square and curly brackets as shown.
	D	Generate default DTMF Tone, default duration
	{t,n}	t specifies a DTMF tone; t = 0-9
		n specifies tone duration n/100 seconds; n = 1-500
	[f,g,n]	f and g specify a tone pair, f Hz and g Hz; in the range n
		Specifies tone-pair duration n/100 seconds; n = 1-500
	Example:	AT+VTS=4,{},[1000,1300,50],8,{*,5},[,,100],5
		This example specifies the following sequence: 1. Play DTMF 4 for the duration stored in +VTD 2. Play silence for the duration stored in +VTD 3. Play tone pair at 1000 Hz and 1300 Hz for 500 ms 4. Play DTMF 8 for a duration stored in +VTD 5. Play DTMF * for 50 ms 6. Play silence for 1 second 7. Play DTMF 5 for the duration stored in +VTD
+VTX		Enter Voice-Transmission Mode
		Notes: the speakerphone state does not have to be reset after recording to the line or playing a message to the line. The baud rate is not set before the StartPlay and StartRecord commands. The baud rate is not reset after the StopPlay and StopRecord commands.


ATS (S-Register) Commands

The modem responds to the following ATS command options.

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

S-Register	Option	Description
S0		Auto-Answer on Ring Number
	S0=0	Disable
	S0=n	Answer on Ring n; n=0 to 255
S1		Ring Count
	S1=n	Counts the number of rings in an incoming call.  If the modem is configured to auto-answer (S0 set to a non-zero option), when S1=S0, the modem answers the call.
S2		Select Escape Character
	S2=n	Specifies ASCII character for Escape; n=0 to 255. Default = 43 (+)
S3		Select Carriage-Return Character
	S3=n	Specifies ASCII character for Carriage-Return; n=0 to 127. Default = 13 (CR)
S4		Select Line-Feed Character
	S4=n	Specifies ASCII character for Line-Feed; n=0 to 127. Default = 10 (LF)
S5		Select Backspace Character
	S5=n	Specifies ASCII Character for Backspace; n=0 to 127. Default = 8 (BS)
S6		Blind Dial
	S6=n	Before dialing, the modem goes off-hook and waits n seconds; n=0 to 255. Note: When the ATX2 or ATX4 option is in effect, the S6 value is disregarded.  Default = 2
S7		Call Time-out
	S7=n	Pause for n seconds; n=0 to 255; before dialing.  Default = 60
S8		Pause Delay
	S8=n	Pause for n seconds; n=0 to 255; for dial modifier in a dial string. Default = 2
S10		DCD Loss Disconnect
	S10=n	Disconnect after n seconds; n=0 to 255 in 0.1 second increments; after DCD signal is de-asserted.  Default = 14
S11		Tone Length
	S11=n	Specifies duration, in 0.001 second increments, of DTMF tone when it is generated; n=60 to 255. Default =72
S12		Escape Code Guard Time
	S12=n	Specifies the interval, in 0.02-second increments, that must be present on either side of the escape code (+++) for the modem to recognize the escape command and enter command mode.   If S12=0, the speed at which you enter the escape sequence is not a factor. Default = 50
S18		Test Timer
	S18=n	Specifies test execution duration; n=0 to 255. Default = 0


Event Reporting Word

You can use the AT+VEM command to define events on which to report. The list is encoded as a word composed of the following bits.

A 1 in a bit-position indicates an event is reported.

A 0 in a bit-position indicates an event is not reported.

Bit	Signal
0	Caller ID (effective only where function is supported)
1
2	Distinctive Ring (effective only where function is supported)
3	RING
4	DTMF Detection
5	Receive Buffer Overrun
6	Fax Calling
7
8
9	Presumed Hang-Up (SILENCE) Time-Out
10	Presumed End-of-Message (QUIET) Time-Out
11
12
13
14
15
16
17
18
19	BUSY
20	DIALTONE
21
22
23	Playback Buffer Underrun
24
25	Fax or Data Answering Modem Detected
26
27	Voice Detected
28
29
30
31
32

Read bits from right (Bit 0) to left (Bit 32).

Blank table entries are unused bits.


Troubleshooting

If there is a problem in making or receiving a call or transmitting data, and your communications application does not explain the problem, check the following list of symptoms and tips.

For This Problem:	Try This:
Modem installs at COM Port 5 (Some ISP applications, such as America Online, do not communicate with a COM port number higher than 4.)	Force the modem to a lower COM port as follows. 1. Open the Control Panel.  2. Double-click the SM56 icon. 3. Click the Advanced tab.  4. Click a button to select a COM port. 5. Close the Control Panel. The modem is assigned to the new COM port.
Windows 95/Windows 98 DOS box applications do not work with the modem	This release of the modem software does not directly support DOS box applications. (Later versions will.) Contact your personal computer or modem supplier for updates, or install an application that traps and virtualizes COM ports. One such application, for Windows 95 and Windows 98 platforms, is TurboCom/95 Pro, from Pacific Commware, Inc., of Ashland, Oregon (www.pacificcommware.com). TurboCom/95 Pro is not completely tested or qualified for SM56 DOS box support, but its basic functions have been verified.
No dial tone	1. Ensure that the telephone cable is securely connected at both ends. 2. Unplug the telephone line cable from the computer, and connect it directly to a telephone from the wall outlet. Check for a dial tone. If there is none, the problem is in the telephone line or system. Call your telephone service provider.
The modem cannot complete a connection to another modem	1. Ensure that your modem is dialing the correct number. Ensure that you've specified the correct area code, if one is required. 2. Ensure that the remote modem is correctly configured to communicate with yours.
The modem does not answer incoming calls	1. Ensure that the automatic answer parameter is set to one of the enabled options, using the ATS0 command (ATS0=1 to answer after one ring, and so on). 2. Ensure that no other devices, such as fax or answering machines, are answering calls before the modem does.
The modem disconnects while transmission is in progress	Ensure that the telephone cable is securely connected at both ends. Ensure that Call Waiting is disabled. In most areas, the command *70 or  #70 disables call-waiting. Check with your telephone company for the correct key sequence.  (With Call Waiting, the incoming call’s alert sound may be disrupting your call.)
Data is not transmitted or received for unusually long periods of time	Re-dial the call.  (The telephone line connection may be poor.)
The computer runs slower than usual.	Close any open applications that you are not using.
You cannot enter tone selections successfully when calling tone-driven applications.	When dialing a remote system that requires you to enter selections using the telephone keys, such as a voice-mail depot or bank-account information provider, you can lengthen the duration of the tones your modem sends, so that the remote system can detect them better.  To adjust DTMF tone length, use the AT+VTDn command, where n specifies the tone duration.
The modem does not respond to AT commands	1. Ensure that your communications software is configured to use the same COM port as the modem's COM port. 2. Reset modem parameters to default options by entering AT&F; then re-enter custom options. 3. Modem software versions after Build 50 require setting the S46 register to 23 before AT&T1 will perform the Local Analog Loopback (LAL) hardware test.
The modem responds to commands, but they do not appear on the terminal	Ensure that the Echo option is enabled by entering ATE1.
You’ve installed a new peripheral device, and now the modem does not work.	1. In the Windows desktop taskbar, select Start. The Start menu appears. 2. Select Help. The Windows Help Topics window appears. 3. Select the Contents tab. 4. Select If You Have a Hardware Conflict. 5. A series of troubleshooting actions appears.  Follow the appropriate sequence.
Modem connects, then meaningless characters appear.	1. Open the Control Panel.  2. Double-click the Modem icon. 3. Select the SM56 modem. 4. Select Properties. 5. Select Connection. 6. Select Advanced. 7. Check the Use Error Control –Required to Connect box.
Modem cannot connect; the Error Control option is selected	The modem may be connecting at a rate higher than is appropriate for the line conditions. 1. Use the AT%B command to limit the modem's maximum connection rate. 2. Lower the rate, using AT commands, until the problem is corrected.  (You can add AT commands to do this; adding  AT commands is explained below.)
How to Add AT Commands

1.	Open the Control Panel.

2.	Double-click the Modem icon.

3.	Select the SM56 modem.

4.	Select Properties.

5.	Select Connection.

6.	Select Advanced.

7.	In the Extra Settings box, add commands as needed.


Disconnect Reasons and Codes

When the modem disconnects from the telephone line, it generates and saves a Disconnect Reason message.  To display the Disconnect Reason message for the most recent disconnected call, issue the ATI5 command in your communications application.  One of the following messages appears.

Disconnect Reason Message
English:
None
DTR DROP
ATH RECEIVED
REMOTE DISCONNECT
OFF-LINE TEST
TRAINING FAILURE
EC LOCAL REQUEST
ALREADY CONNECTED
DIAL ABORTED
BUSY TONE DETECTED
NO DIALTONE
DIAL ABORTED - INCOMING CALL
IMPROPER DTR STATE
PHONE NUMBER BLACKLISTED
RETRAIN THRESHOLD
SEMICOLON DETECTED
ABT TIMEOUT - NO RINGBACK
ABT TIMEOUT - RING BACK RECEIVED
ABT TIMEOUT  - NO CALL PROGRESS
ABT TIMEOUT  - NO ANSWER
BUSY AFTER RING BACK
EC - TRANSMISSION LIMIT
EC - REMOTE REQUESTED
EC - NO VALID PACKET RECEIVED
EC - ESTABLISHMENT ERROR
EC - ACCEPTOR TIMEOUT
EC - NEGOTIATION FAILURE
EC - PROTOCOL VIOLATION
EC - BAD PARAMETER
EC - DATA COMPRESSION ERROR
FSK RELIABLE INVALID
DTE INACTIVITY TIMEOUT
EC REMOTE NO PSTN
RETRAIN TIMEOUT
VOICE DISCONNECT - VLS=0
VOICE TO FAX/DATA SWITCH
UNKNOWN


Diagnostic Test

If there is a communications problem, run a quick test to determine whether the modem is responding to commands from the computer, as follows.

1.	In the Windows taskbar, select Start; then Settings; then Control Panel.

2.	Open the Modems icon.

3.	Select the Diagnostics tab.

4.	Highlight the port associated with the modem.

5.	Select More Info. This test sends AT commands to the modem. The modem’s responses should appear. If they do not, close open applications and restart the computer. If you find the same communications problem, continue with the LAL test, next.

For further information, you can run a Local Analog Loopback (LAL). The LAL tests whether the modem is passing error-free data to and from the locally-connected computer.

To run an LAL test:

1.	Remove the telephone line connector from the modem's line input connector.

2.	Run a communications application that provides a terminal emulation mode. For example, the HyperTerminal application, found on computers that have Windows, offers terminal emulation mode.

3.	Issue the ATS46=23 command.

4.	Issue the AT&F command to set the modem to factory-default options. OK appears.

5.	Issue the AT&T1 command (the characters may not appear as you type). Wait for ten seconds.

6.	Begin typing on the keyboard.  The characters you type should appear.

7.	Enter +++.  OK appears.

8.	Enter the ATH (hang up) command to end the LAL test.

If the characters that you typed did not appear properly, close open applications and restart the computer.  If you find the same communications problem, report the problem to your personal computer or modem vendor.


Un-Installing the Modem

This section explains how to remove the modem from a personal computer. This is a two-part process:

•	The first part un-installs the modem software

•	The second part un-installs the modem hardware

Part 1: Un-Installing the Modem Software

This is the first part of the un-install procedure.

Step	Stage
1.	Select Start; then Settings; then Control Panel.
2.	Open Add/Remove Programs.
3.	Select Motorola SM56 Modem Uninstall. Select Add/Remove.  The system prompts you to close the Control Panel to remove the modem applet. Do so. The Confirm File Deletion dialog box appears.
4.	Select Yes. The Uninstall program executes.  The system indicates that the un-install was successful.
5.	Select OK. The Uninstall window closes.
6.	Close the Add/Remove Programs window.
7.	Continue with Part 2 of the un-install procedure.
Part 2: Removing the Modem Hardware

This is the second part of the un-install procedure.

Step	Stage
1.	Shut down the computer.  Unplug it from the power source. WARNING When removing an internal modem from a personal computer, disconnect the telephone cable and disconnect all power from the personal computer. Allow the modem card to cool for three or four minutes before handling it.
2.	Unplug the telephone cables from the modem card connector.
3.	Open the computer cover. If you are using the Data/Fax/Voice modem, remove the four-pin audio cable from the modem line interface card. Remove the modem line interface card, as shown below.
4.	Replace the computer cover. Connect the computer to the power source. Restart the computer.
5.	The un-install procedure is complete.


Environmental Limits

The modem’s environmental limits are as follows.

Operating temperature Range	32 to 122ºF (0 to 50ºC)
Non-operating (storage) temperature range	-40 to 158ºF (-40 to 70ºC)
Operating humidity range	10% to 80% non-condensing at 104ºF (40ºC)
Non-operating humidity range	5% to 95% non-condensing over -40 to +70ºC
Operating altitude range	0 to 10,000 feet
Non-operating altitude range	0 to 40,000 feet


V.90 and K56flex

	V.90 and K56flex™ technology allow users to connect to the Internet at rates up to twice as fast as those of V.34 modems.  The maximum receive rate is 56K, while the return path connects at V.34 rates up to 33.6 KBPS.  This is perfect for Internet connections in which most data is transferred from the Internet to the client computer.
With V.90 technology, users are assured of achieving the highest degree of interoperability with Internet service providers (ISPs), because, following the ITU V.90 Initiative, most ISPs are converting to V.90.

Visit the V.90 website (www.v90.com) for a wealth of information, including:

•	A complete list of ISPs that support V.90

•	Latest news on V.90

•	Technical “white papers” on V.90

•	Frequently Asked Questions (FAQs) about V.90

To use V.90, contact your ISP to:

•	Ensure that the ISP supports V.90

•	Get a dial-in number for a V.90 connection

Notes:

56K rates may not always be achievable, due to adverse line conditions.

When the modem connects to a non-V.90 head-end:

•	If the head-end is K56flex™-compliant, the modem connects at K56flex™ rates.

•	If the head-end is X2™-compliant, the modem connects at V.34 rates.


Dual Tone Multi-Frequency

Method used by the telephone system to communicate the keys that are pressed


Dial String

A series of characters that specify a number to dial and actions for the modem to take while dialing.

Composed of numerals and special characters.


DCD

Data Carrier Detect signal. The modem asserts this signal to the local computer when it has received an acceptable carrier signal over the telephone line. If the acceptable carrier signal is lost, the modem de-asserts this signal.


DTR

Data Terminal Ready signal. The computer asserts this signal to the modem when it is ready to accept data.


CTS

Clear to Send signal. The modem asserts this signal to the local computer when it is ready to receive data from the computer.

A method of transmitting data more efficiently.


DSR

Data Set Ready signal. The modem asserts this signal to the computer when it is ready to enter the data transmission phase.


EC

Error-Correction


DC

Data-Compression


ATH

Attention Hang-up signal. Directs the modem to go on-hook.


ABT

Answer-Back tone.


IRQ

Interrupt Request. An input that causes the computer's processor to suspend normal instruction execution temporarily, and start executing an interrupt handler routine. IRQ also refers to any of the interrupt-request lines on which the inputs are transmitted.


DOS Box Applications Support

ISA Modem

The SM56 ISA modem supports applications that run in a Windows 95/98 DOS box.

To set up your DOS-based application to communicate with the modem, determine which COM port the modem is connected to, as follows.

1.	From the Windows Taskbar, select Start; then Settings; then Control Panel.  The Control Panel appears.

2.	Open the System icon. The System Properties Sheet appears.

3.	Select the Device Manager tab.

4.	Open the Modems icon. The modem icons appear.

5.	Open the Motorola SM56 icon. Its Properties Sheet appears.

6.	Select the General tab.

7.	Make a note of the COM port number.

8.	Close the Properties Sheet and the Control Panel.

When setting up your DOS-based application to communicate with the modem, use the standard IRQ and base I/O information for the COM port number.  Standard IRQs and base I/Os are as follows:

COM Port	IRQ	Base I/O

COM1	4	3F8

COM2	3	2F8

COM3	4	3E8

COM4	3	2E8

The modem uses two IRQs to support DOS-based applications:

•	The standard DOS IRQ, as listed above

•	The IRQ listed in the Resource tab of the modem’s Properties Sheet (Control Panel, System icon, Device Manager tab)

Ensure that these are assigned different IRQs when setting up your DOS-based applications. If necessary, change the modem’s IRQ, by selecting the Change Settings button on the modem’s Resource tab.

Refer to the Troubleshooting section for additional information on Windows 95/Windows 98 DOS box issues.

PCI Modem

The SM56 PCI modem does not directly support Windows 95/Windows 98 DOS box applications. A COM port-redirection application may allow you to use the SM56 PCI modem with DOS box applications. One such application is TurboCom Pro/95, from Pacific Commware (www.pacificcommware.com).


Interrupting the Answering Machine to Pick Up a Voice Call

This information applies only to the SM56 Data/Fax/Voice modem.

When you’re using the computer as an answering machine (any time during the announcement or recording), you can change to the handset or speakerphone as follows.

To Pick Up With the Handset

1.	Pick up the handset. You are connected to the phone line and you hear either the outgoing message or the caller.

2.	Use your computer’s voice communications application to select Turn Off Recording or Turn Off Answering Machine. The application instructs the modem to stop recording or playing. The handset remains connected to the line.

To Pick Up With the Speakerphone

Use your computer’s voice communications application to select Answer Call or Activate Speakerphone. The application instructs the modem to stop recording or playing, and activates the speakerphone.


Switching a Speakerphone Call to the Handset

This information applies only to the SM56 Data/Fax/Voice modem.

When you’re using the computer as a speakerphone for a voice call  (incoming or outgoing), you can change to the private handset as follows.

1.	Pick up the handset. You are connected to the phone line. You can speak to the other party.

2.	Use your computer's voice application to turn off the speakerphone. The application instructs the modem to silence the speakerphone and leave the handset active.


Switching a Handset Call to the Speakerphone

This information applies only to the SM56 Data/Fax/Voice modem.

When you’re using the telephone handset for a voice call (incoming or outgoing), you can change to the speakerphone as follows.

1.	Use your computer’s voice application to select Speakerphone. The application instructs the modem to activate the speakerphone. The handset and the speakerphone are active.

2.	Hang up the handset.


DOS Based Games and Applications

The SM56 PCI modem does not directly support Windows 95/Windows 98 DOS box applications. A COM port-redirection application may allow you to use the SM56 PCI modem with DOS box applications. One such application is TurboCom Pro/95, from Pacific Commware (www.pacificcommware.com).

You can use the modem with DOS-based games and other applications. Most have provisions for adding an unsupported modem to their supported-modem list. Others let you enter in information about the modem in order to use it. The information items that such applications may need are as follows.

•	Initialization string  - for setting the modem to a known state

•	Hang-up string  - for terminating a phone call

•	Dialing string  - for instructing the modem to initiate a phone call

•	Answer string - for instructing modem to answer a phone call

•	COM port rate - for sending serialized data is sent to the modem

Command Strings

You can use the following command strings with the modem.

Initialization:  AT&F

Initialization with games that require that the modem does not perform error correction and data compression: ATS46=23  AT&F\N0

•	Hang-up: ATH0

•	Dialing string: ATDT.

•	Answer string: ATA

•	COM port rate: 57600

Important: do not put spaces between commands.


Click this button to make your choice.


Click this button to make your choice.


Enter your input in this field.


Click this button to make your choice.


Choose an item from the list.


Select your preferred option.


Select your preferred option.


Select your preferred option.


Select your preferred option.


This area lets you select a country or region for the modem software installation.

Select an item from the list.


Click this button to make your choice.


This area displays the modem Control Panel application version information.

Select OK to close this window.