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.

•	Use your computer as a telephone answering machine
(Not available on Data/Fax modems.)

•	Use your computer as a speakerphone, to place and receive voice calls
(Data/Fax/Speakerphone modem only.)

What type of modem do I have?

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 speakerphone, 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 Motorola SM56 Modem icon. The Control Panel is active.


Installing or Re-Installing the Modem

The SM56 Modem 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® MII 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 modem software is different from that for Windows 95 and Windows 98)

•	The SM56 modem requires:

- One vacant 32-bit PCI slot

- One available IRQ: 3 through 15

•	For Data/Fax/Speakerphone and Data/Fax/TAM modems, a compatible sound card

Installing the Modem

Part 1:  Hardware Installation

Install the modem as follows:

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 modem board into an empty PCI slot.
4.	If using the SM56 Data/Fax/Speakerphone 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
5.	Connect the modem to an analog telephone line jack, using the telephone cable provided.
6.	Turn on the computer.
Part 2:  Software Installation

Note: The Install Wizard may vary slightly with different versions of the operating system and different service packs.

Windows 95/98 Installation

On starting Windows for the first time after installing the SM56 line interface card, the Windows Configuration Manager detects the new hardware, assigns resources to it, and then displays a window requesting the modem software drivers. This indicates that the Configuration Manager is looking for the information (INF) file, which contains the following information about the modem,

•	device type (Modem)

•	device driver information (the name of the driver that will control the modem)

•	AT command/response sets

Install the software on Windows 95/98 as follows:

1.	In response to the request window. Select Driver from Disk Provided by Hardware Manufacturer (or Have Disk, depending on the OS version) and browse to where the SM56 drivers are located. Windows should find the information on the disk and identify the device as a SM56 Modem. It then copies the files from the install disk to the computer.

2.	The install program will display a message box that reports Cannot locate file.... If this occurs, browse and re-point to where the SM56 driver files are located. Then click OK. Installation will now complete.

3.	On Data/Fax/TAM and Data/Fax/Speakerphone modems, another device is found after the modem has been installed. Windows notifies you that it has found a Serial Wave Device for the modem and prompts for a Wave Device driver. Re-point to the SM56 driver location and click OK.

When these two devices are installed, the SM56 Modem Setup program runs.

The modem setup program does not prompt for user input during installation. It defaults to USA country code and Domestic English as the language for the online Help (User's Guide). If you wish to change these settings, and/or the COM port selection, you may do so via the SM56 Control Panel application (Start->Settings->Control Panel, then double-click the Motorola SM56 Modem icon) after setup is complete. Also, for SM56 Data/Fax/Speakerphone modems the microphone and speaker gain selections may be done via the Control Panel application (under the Advanced tab).

DOS box support is disabled after the SM56 is installed. After install is complete, you must enable it via the Advanced tab in the SM56 Control Panel application. Make sure the DOS box check box is checked. If not, click it to check it, exit the SM56 Control Panel application and restart the computer. You must restart the computer to complete DOS box enabling.

Windows NT 4.0 Installation

Important -- The SM56 software for Windows NT 4.0 is Data/Fax only.

Windows NT 4.0 does not fully support plug and play (PnP). Therefore, after installing the modem board in the computer and booting, the operating system will not automatically recognize that new hardware is present. You must manually install the modem as follows:

Step 1 – Install a COM port for the modem

You first must install a COM port for the SM56 modem as follows:

1.	Open the Windows NT Control Panel.

2.	Double click the Ports icon. The Ports window opens.

3.	Select Add.

4.	Select a COM port number (in the range 1-4 preferably) that is not already installed, and allocate to it the standard resources as follows:

COM Port	IO Address	IRQ
1	3F8	4
2	2F8	3
3	3E8	4
4	2E8	3
5.	When your selections are complete click OK.

6.	You will be prompted to restart the computer, do not do so yet. Select Don't Restart Now.

7.	Close the Ports window.

Step 2 – Install the SM56 modem software

1.	Open the Windows NT Control Panel.

2.	Double click the Modems icon....the Install New Modem dialog appears.

3.	Click the "Don't detect my modem; I will select it from a list" check box. Then click Next.

4.	Click the Have Disk button.

5.	Browse to the Windows NT SM56 modem install software. Click misgmodm.inf to highlight it. Then click Open, then click OK.

6.	Select the Motorola SM56 Modem from the list. Click Next.

7.	Click the port number selected in Step 1 above to highlight it as the COM port for the modem. Then click Next. The wizard will now copy all the necessary files and install the SM56 modem on your PC.

8.	When complete, restart the PC to activate and start the COM port and SM56 modem devices. You are now ready to use the 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 for Windows 95/98

Upgrade the modem to a newer version as follows.

1.	Obtain the latest software version from your direct modem or computer supplier.

2.	Run sm56set.exe and follow the Upgrade Wizard prompts. The upgrade utility retains a backup of your previous modem version in a folder called Program Files\Motbak95 for Win 9x, Program Files\MotbakNT for Win NT. It also retains the current modem COM port and IRQ resources so all communication applications will continue to function correctly.

Recovering from an Unsuccessful Windows 95/98 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 SM56 Modem, then click Add/Remove to run the uninstall program.

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

4.	Open the Control Panel and determine if the SM56 Modem Control Panel icon is there.  If so, close the Control Panel; open the windows\system folder; and delete the mca.cpl file.

5.	Restart the computer.

6.	Upon restart, re-install the SM56 modem from the backup directory -- Program Files\Motbak95. This reinstalls your previous modem software.

Upgrading Modem Software for Windows NT 4.0

Obtain the latest driver from your direct modem or computer supplier.

Uninstall the current SM56 modem software completely (Run uninstall and delete the Motorola SM56 INF files from \WindowsNT\INF\other).

Restart the computer and perform a complete SM56 modem Windows NT software installation using the updated driver (including the COM port install).


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 95/98 to Windows NT, 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.	Perform a complete SM56 uninstall procedure on your existing modem.

3.	Perform the operating-system upgrade.

4.	Install the new modem software.

Upgrading from Windows 95 to:

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.

Windows NT

The SM56 Windows 95/98 modem software 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


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
Caller ID (US and Canada only)

Note:	This feature is not available on Data/Fax modems.

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
Distinctive Ring (US only)

Note:	This feature is not available on Data/Fax modems.

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
Telephone Answering Machine (TAM) Mode

Note:	TAM is not supported by Data/Fax 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
Retrieving Answering Machine Messages From a Remote Location

Note:	This feature is not supported by Data/Fax 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
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 speakerphone 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.
&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(300 bps)
	%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 speakerphone 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 mode 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 (Not available on Data/Fax and Data/Fax/TAM modems.
+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
	07	Argentina
	09	Australia
	0A	Austria
	0F	Belgium
	16	Brazil
	20	Canada
	26	China
	27	Columbia
	2E	Czech Republic
	31	Denmark
	3C	Finland
	3D	France
	42	Germany
	50	Hong Kong
	57	Ireland
	58	Israel
	59	Italy
	5E	Jordan
	61	Korea
	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
	BB	Venezuela
	BC	Vietnam
+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 bps)
	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. Data/Fax modems do not support this option.
	+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. Data/Fax modems do not support this option.
	+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 Data/Fax/Speakerphone modem only	Event Reporting and Masking Control
		Bit-mapped event control mask. See Event Reporting Word.
+VGR Data/Fax/Speakerphone modem only	Receive Gain
	0	Automatic Gain Control
	1-255	Relative range, where 128 indicates a nominal value.
+VGT Data/Fax/Speakerphone modem only	Transmit Volume
	1-255	Relative range, where 128 indicates a nominal value.
+VIP Data/Fax/Speakerphone modem only	Initialize Voice Parameters
		Set speakerphone  parameters to factory-default options.
+VLS Data/Fax/Speakerphone modem only	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 Data/Fax/Speakerphone modem only	Voice DTE-DCE Rate
	+VPR=0	Autobaud
+VRA Data/Fax/Speakerphone modem only	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
		Ringback Never Occurred
	+VRN=n	After n/10 seconds, operate as if ringback had never occurred; n = 0-255
+VRX Data/Fax/Speakerphone modem only	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 Data/Fax/Speakerphone modem only	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 Data/Fax/Speakerphone modem only	Speech Compression Properties
	+VSM=m,n,p,q	Specifies the speakerphone 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 Data/Fax/Speakerphone modem only	DTMF Tone Duration
	+VTDn	Generate tone for n/100 seconds; n = 0-255. Default=100.
+VTS Data/Fax/Speakerphone modem only	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 Data/Fax/Speakerphone modem only	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.

Note: All events are enabled by default and indicated by the underlined bit number.

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 by the phone company.  Not supported on Data/Fax modems.)
1
2	Distinctive Ring (effective only where function is supported)
3	RING
4	DTMF Detection
5	Receive Buffer Overrun
6	Fax Calling
7	Data Calling
8
9	Presumed Hang-Up (SILENCE) Time-Out
10	Presumed End-of-Message (QUIET) Time-Out
11
12
13
14
15
16
17
18	Ring Back
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 unsupported events.


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 5 (or higher). Some communications applications do not communicate with a COM port number higher than COM 4.	If the SM56 installs on COM 5 or higher, force the modem to a lower COM port as follows: 1. Open the SM56 Control Panel (Start->Settings->Control Panel, then double-click the SM56 Modem icon).  2. Click the Advanced tab.  3. Click a radio button for the desired COM port. Note that unavailable COM ports are grayed out and not selectable.
Windows 95/98 DOS box applications do not work with the modem	By default DOS box support is disabled after installing the SM56 modem. Enable the DOS box with the Advanced tab in the SM56 Control Panel application (Start->Settings->Control Panel, then double-click the SM56 Modem icon). If the DOS Box check box is selected, then DOS box support should be enabled.   If not selected, then select the check box, exit the SM56 Control Panel application, and restart the computer.  If the Enable DOS Box is selected that is, enabled, and the DOS box does not work, perform the following steps: 1.   Open the Control Panel.   2.   Double click the System icon.   3.   Expand the Modem branch.   4.   Double click the Motorola SM56 modem.   5.   Select the Modem tab.  Make a note of the COM port number. 6.   Select the Resources tab. Make a note of the IRQ number listed.   7.   For DOS support to operate correctly, the SM56 modem cannot occupy the standard IRQ for the COM port number.    8.   Uncheck the Use Automatic Resources check box.   Double click on the Interrupt Request label and change the IRQ to a different number that is not in conflict with another device. (If there is no free IRQ:  free one, or change other device IRQ levels to free a non-standard IRQ).
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, ATS0=2 to answer after two rings, 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	1. Ensure that the telephone cable is securely connected at both ends. 2. 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	1. Re-dial the call.  (The telephone line connection may be poor.) 2. Try another ISP number, the server could be busy. 3. Call your ISP and find out if they are having server problems or any suggestions why data transmission is lethargic.
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. SM56 builds after Build 50 requires 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 screen	Ensure that the Echo option is enabled by entering ATE1.
You’ve installed a new peripheral device; now the modem does not work.	1. In the Windows desktop tray, select Start. 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.
You hear feedback (noise) from the PC sound system (Data/Fax/Speaker- phone modems)	1. Position the speakers at least three feet (1 M) away from the microphone. 2. Ensure that the speakers are facing away from the microphone. 3. Turn down the speaker volume. 4. Speak into the microphone at a distance of at least 12 inches (30 cm) from your mouth.  Minimize background noise. 5. If feedback persists, turn off the microphone boost under the volume control panel.
Modem connects, then meaningless characters appear.	1. Open the Control Panel. Double-click the Modem icon. 2. Select the Motorola SM56 modem. 3. Select Properties. 4. Select Connection. 5. Select the Advanced tab. 6. 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 appropriate for the line conditions. 1. Use the AT%B command to limit the SM56 maximum connection rate. (For a list of AT commands, refer to the AT command sections of this document.) 2. Lower the rate, using AT commands, until the problem is corrected.  Add AT commands as explained below.
How to Add AT Commands

1.	Open the Control Panel.

2.	Double-click the Modem icon.

3.	Select the Motorola SM56 modem.

4.	Click on Properties.

5.	Select Connection.

6.	Click on the Advanced tab.

7.	In the Extra Settings box, add commands as needed. The AT prefix is not required, although the Extra Setting box will accept it.


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 (Data/Fax/Speakerphone modem only)
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.


Uninstalling the Modem

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

•	The first part uninstalls the modem software

•	The second part uninstalls the modem hardware

Part 1: Uninstalling the Modem Software

This is the first part of the uninstall 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 uninstall was successful.
5.	Select OK. The Uninstall window closes.
6.	Close the Add/Remove Programs window.
7.	Continue with Part 2 of the uninstall procedure.
Part 2: Removing the Modem Hardware

This is the second part of the uninstall 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/Speakerphone 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 uninstall procedure is complete.
	Note: The attached four-pin audio cable is found on Data/Fax/Speakerphone modems only.
Note:	Having completed the uninstall procedure, the modem files remain on the hard disk.  The next time the computer is started, with the SM56 modem card installed, the modem software will automatically self-install.  There is no need to repeat the complete modem install procedure.


V.90 and K56flex

	V.90 and K56flex™ technologies 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

The SM56 modem supports applications that run in a Windows 95/98 DOS box. After installing the SM56 modem, DOS box support is disabled by default.

Note: The SM56 modem does not support Windows NT DOS box applications.

To Enable DOS Box Support

1.	Open the SM56 Modem Control Panel application (Start->Settings->Control Panel, then double-click the SM56 Modem icon).

2.	Select the Advanced tab.

3.	Click the Enable DOS Box.

4.	Exit the SM56 Control Panel and restart the computer as prompted.

5.	Open the Motorola SM56 icon.

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.


Interrupting the Answering Machine to Pick Up a Voice Call

Note:	This feature is supported only on Data/Fax/Speakerphone modems.

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

Note:	This information applies only to the Data/Fax/Speakerphone modems only.

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

Note:	This information applies only to the Data/Fax/Speakerphone modems only.

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
DOS-Based Games and Applications

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.

For more information on enabling Windows 95/98 DOS support, see DOS Box Applications Support.


Determining Your Modem Type

There are three different SM56 modem types, and each supports a different feature-set. You can check which modem you have by opening the SM56 Control Panel application (Start->Settings->Control Panel, then double click on the SM56 Modem icon). On the application's main window the product name of your installed modem is displayed. Using the table below, find your Product Name in column 1. Column 2 lists the type of modem you have installed, while column 3 lists the different modem features.

Product Names	Modem Types	Features

Motorola SM56 PCI Fax Modem	Data/Fax only	·	All data and fax modes
Motorola SM56CPQ PCI Modem	·	No telephone answering
machine (TAM)
•	No caller ID
•	No distinctive ring
•	No speakerphone

Motorola SM56 PCI Voice Modem	Data/Fax/TAM	·	All data and fax modes
•	Telephone answering
machine (TAM)
•	Caller ID
•	Distinctive ring
•	No speakerphone

Motorola SM56 PCI Speakerphone	Data/Fax/TAM/	·	All data and fax modes
Modem	Speakerphone	·	Telephone answering
machine (TAM)
•	Caller ID
•	Distinctive ring
•	Full-duplex speakerphone


AT#UD Unimodem Diagnostic Command

The Unimodem Diagnostic Command Specification is provided by Microsoft to enable modems to exhibit consistent behavior during data session diagnostics. The latest specification revision of this command can be found on the Microsoft Web site.

Command Syntax:	AT#UD

#UD is an action command.  It does not take parameters.

Although this command is intended for use after call termination, codes are defined so that a modem can respond before the call is placed, and during a call for live monitoring purposes.

Command Response:

In response to this command, the modem reports information about the modem. Each information text line is formatted as follows, including one or more key=value pairs:

DIAG <token key = value [[key = value] [key = value]] …>

Where, token is a unique 32-bit hex number 2A4D3263

key is a hex number, described in column 1 of Table 1.

value is a string defined by column 2 in Table 1.

Note: unless otherwise noted, all values are hexadecimal numbers.

Table 1 - AT#UD Last Call Status Report Format

Key	Value	Definition
0	2 digits	Diagnostic Command Specification revision number
1	See Table 2	Call Setup Result code
2	See Table 3	Multi-media mode
3	See Table 4	DTE-DCE interface mode
4	String	V.8 CM octet string, same format as V.25ter Annex A, in quotes
5	String	V.8 JM octet string, same format as V.25ter Annex A, in quotes
6-F		Reserved for call negotiation reports
10	0-2F	Received signal power level, in –dBm (0-43)
11	0-1F	Transmit signal power level, in –dBm (e.g. 0-17)
12	0-64	Estimated noise level, in –dBm (e.g. 10-90)
13	0-FF	Normalized Mean Squared error, 100 (0x64) = minimum inter-symbol distance
14	0-3F	Near echo loss, in units of dB
15	0-3F	Far echo loss, in units of dB
16	0-3F	Far echo delay, in units of ms
17	0-FFF	Round Trip delay, in units of ms
18	See Table 5	V.34 INFO bit map
19-1F		Reserved for modulation setup and training reports
20	See Table 6	Transmit Carrier Negotiation Result
21	See Table 6	Receive Carrier Negotiation Result
22	0-1F40	Transmit Carrier symbol rate (0-8000) in symbol/s
23	0-1F40	Receive Carrier symbol rate (0-8000) in symbol/s
24	0-FA0	Transmit Carrier frequency (0-4000) in Hz
25	0-FA0	Receive Carrier frequency  (0-4000) in Hz
26	0-FA00	Initial transmit carrier data rate (0-64000) in bit/s
27	0-FA00	Initial receive carrier data rate (0-64000) in bit/s
28-2F		Reserved
30	0-FF	Temporary carrier loss event count
31	0-FF	Carrier Rate re-negotiation event count
32	0-FF	Carrier Retrains requested
33	0-FF	Carrier Retrain requests granted
34	0-FA00	Final transmit carrier data rate in bit/s
35	0-FA00	Final receive carrier data rate in bit/s
36-3F		Reserved
40	See Table 7	Protocol Negotiation Result
41	0-400	Error Control frame size in bytes
42	0-FF	Error control link timeouts in transmission
43	0-FF	Error control link NAKs received
44	See Table 8	Compression Negotiation Result
45	0-800	Compression dictionary size in bytes
46-4F		Reserved
50	0-2	Transmit flow control: 0 = off; 1 = DC1/DC3; 2 = V.24 ckt 106/133
51	0-2	Receive flow control: 0 = off; 1 = DC1/DC3; 2 = V.24 ckt 106/133
52	0-FFFFFFFF	Transmit characters sent from DTE
53	0-FFFFFFFF	Received characters sent to DTE
54	0-FFFF	Transmit characters lost (data overrun errors from DTE)
55	0-FFFF	Received characters lost (data overrun errors to DTE)
56	0-FFFFFFFF	Transmit I- Frame count, if error control protocol running
57	0-FFFFFFFF	Received I-Frame count, if error control protocol running
58	0-FFFF	Transmit  I-Frame error count, if error control protocol running
59	0-FFFF	Received I- Frame error count, if error control protocol running
5A-5F		Reserved
60	See Table 9	Termination Cause
62-7F		Reserved for future versions of this specification
80-FF		Reserved for manufacturer proprietary keys
Table 2 - Call Setup Result Codes

Code	Definition
0	No previous call (modem log has been cleared since any previous calls)
1	No dial tone detected
2	Reorder signal detected, network busy
3	Busy signal detected
4	No recognized signal detected (e.g. no signal, or nothing recognizable)
5	Voice detected * if this is a voice modem (e.g. V.253) operating in voice mode (e.g. +FCLASS=8.0)
6	Text telephone signal detected (see V.18)
7	Data Answering signal detected (e.g. V.25 ANS, V.8 ANSam)
8	Data Calling signal detected (e.g. V.25 CT, V.8 CI)
9	Fax Answering signal detected (e.g. T.30 CED, DIS)
A	Fax Calling signal detected (e.g. T.30 CNG)
B	V.8bis signal detected
C-F	Reserved
Table 3 – Multimedia modes

Code	Definition
0	Data Only
1	FAX Only
2	Voice Only  * if voice mode supported (e.g. V.253, IS-101)
3	VoiceView™
4	ASVD, V.61
5	ASVD, “V.34Q”
6	DSVD, Multi-Tech
7	DSVD, 1.2
8	DSVD, V.70
9	Video-telephony, H.324
A	Other V.80 call
B-F	Reserved
Table 4 – DTE-DCE modes

Code	Definition
0	Async data
1	V.80 transparent synchronous mode
2	V.80 framed synchronous mode
3-F	Reserved
Table 5 – V.34 INFO bit report (applicable only to V.34 or V.90 calls)

Bits	Source bits	Definition
31-30	INFO0 bit 20; 0
20-29	INFOc bits 79-88
16-19	INFOc bits 26-29 or 35-38 or 44-47 or 53-56- or 62-65 or 71-74	Pre-emphasis field, selected by the symbol rate chosen
12-15	INFOa bits 26-29
10-11	MP bit 50; 0
0-9	INFOa bits 40-49
Table 6 – gstnModulationSchemeActive from 3.7.2/V.58

Value	Description
0	V.17 (G3 Fax call)
1	V.21
2	V.22
3	V.22bis
4	V.23 Constant Carrier (1200/75)
5	V.23 Switched Carrier (half duplex)
6	V.26bis
7	V.26ter
8	V.27ter (G3 Fax call)
9	V.29 HD (G3 Fax call)
A	V.32 (difficult to distinguish from V.32bis)
B	V.32bis
C	V.34
D	V.34 HD (G3 Fax call)
E	V.90 Issue 1 (asymmetric)
F	V.90 Issue 2 (symmetric)
E-7F	Reserved (V.58)
80	X2™
81	K56FLEX™
82	V.FC
83	V.32terbo
84	Bell 212A (if modem supports B212A)
85	Bell 103 (if modem supports B103)
80-FF	Reserved for mfgs
Table 7 – errorControl Active from 3.5.2/V.58

Value	Description
0	Disable/none
1	V.42 LAPM
2	V.42 Alterative protocol (MNP™)
3-7F	Reserved (V.58)
80	MNP10™
81	ECP™ Enhanced Cellular Protocol
82	ETC™ Enhanced Throughput Cellular
82-FF	Reserved for mfgs
Table 8 – compressionActive from 3.2.2/V.58

Value	Description
0	None
1	V.42bis
2-7F	Reserved (V.58)
80	MNP5™
81-FF	Reserved for mfgs
Table 9 – callCleared codes from 3.6.4/V.58-1994

Indicates that the DCE has gone on hook and that the previously existing network connection has been cleared.  These values are hex.

Value	Description	Notes
0	CauseUnidentified	Call setup issues
1	No Previous call	Not in V.58
2	Call is still in progress	Not in V.58
3	Call Waiting signal detected	Not in V.58, only if modem can detect it
4	Delayed	Same as value 2A, CallAttemptsLimitExceeded
A	NMSinitiatedDialCall	-- Network Management System
B	NMSinitiatedLeasedLineRestoral
C	NMSinitiatedRedial
D	NMSinitiatedDialDisconnect
14	PowerLoss	DCE
15	EquipmentFailure
16	FrontPanelDisconnectRequested	If there is a front panel with this control
17	FrontPanelLeasedLineRestoral
18	AutomaticLeasedLineRestoral
19	InactivityTimerExpired
1E	cct116RestoralRequest	DTE Interface
1F	cct108isOffInhibitsDial
20	cct108turnedOff	This is hangup with &D2
28	NoNumberProvided	Prohibited by some national regulations
29	BlacklistedNumber
2A	CallAttemptsLimitExceeded	Same as “Delayed”, see ETS 300 001
2B	ExtensionPhoneOffHook	If extension detection supported
2C	CallSetupFailTimerExpired	e.g. S7 timeout
2D	IncomingCallDetected	If incoming call while sending dial command.
2E	LoopCurrentInterrupted
2F	NoDialTone
30	VoiceDetected
31	ReorderTone
32	SitTone
33	EngagedTone
34	LongSpaceDisconnect	And if modem program to abort on long space
3C	CarrierLost	Signal Converter
3D	TrainingFailed
3E	NoModulationinCommon
3F	RetrainFailed
40	RetrainAttemptCountExceeded
41	GstnCleardownReceived
42	FaxDetected
46	InTestMode	Test
47	IntrusiveSelfTestInitiated
50	AnyKeyAbort	Call Control
51	DteHangupCommand	If ATH was used to terminate the previous call.
52	DteResetCommand	If ATZ was used to terminate the previous call.
5A	FrameReject	Error Control
5B	NoErrorControlEstablished	Error control was required
5C	ProtocolViolation
5D	n400exceeded
5E	NegotiationFailed
5F	DisconnectFrameReceived
60	SabmeFrameReceived
64	LossOfSynchronization	Data Compression
Example Modem Response and Usage

Table I-1 - Completed Data Call, with some errors and rate retrain during the call

Modem response line	Description
DIAG <2A4D3263 0=10>	This is version 1.0
DIAG <2A4D3263 1=06 2=0 3=0>	Data Answer signal detected; Data only; Character async
DIAG <2A4D3263 5=”C14513902A” 6=”A145”	V.8 Call Menu indicates:  V.8 Joint Menu selects:
DIAG <2A4D3263 10=1F 11=0C 12=52>	Receive level = -31dbm; transmit level = -12dbm; noise level = -82dbm
DIAG <2A4D3263 14=03 15=05 16=10>	Far end echo delay in milliseconds; Far end echo loss in dB; Near end echo loss = 16 dB
DIAG <2A4D3263 20=C 22=780 24=0C80 26=79E0 >	Transmitter: V.34 training completed; V.34 carrier frequency = 1920; V.34 symbol rate = 3200; initial transmit rate is 31200 bit/s
DIAG <2A4D3263 21=D 25=1F40 27=DAC0 >	Receiver: V.90 training completed; V.90 symbol rate = 8000; initial receive rate is 56000 bit/s
DIAG <2A4D3263 30=00 31=03 32=01 33=01>	No carrier loss events, 3 carrier rate renegotiations attempted; 1 carrier retrain requested; 1 carrier retrain granted
DIAG <2A4D3263 34=7080 35=CB20>	Final transmit rate is 28800 bit/s; final receive rate is 52000 bit/s
DIAG <2A4D3263 40=1 41=100>	LAPM negotiation completed; frame size = 256
DIAG <2A4D3263 42=0 43=0>	No error control timeout or link NAKs
DIAG <2A4D3263 44=1 45=400>	V.42bis data compression used; dictionary size = 1024
DIAG <2A4D3263 50=2 51=2>	Hardware transmit and receive flow control
DIAG <2A4D3263 52=343CC 54=0>	213964 DTE characters transmitted, w/o underrun
DIAG <2A4D3263 53=7230E6 55=47>	7483622 DTE characters received, 71 characters lost due to receive data overrun
DIAG <2A4D3263 56=29D 58=0001>	597 (decimal) frames transmitted, with 1 frame error
DIAG <2A4D3263 58=2A4B 59=0004>	10827 (decimal) frames received, with 4 frame errors
DIAG <2A4D3263 60=51>	Local PC initiated hangup


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