Xircom M3AWEB56GA Spread Spectrum PCI Card Transceiver Module User Manual Mini PCI Wireless Ethernet Modem UG
Xircom Spread Spectrum PCI Card Transceiver Module Mini PCI Wireless Ethernet Modem UG
Xircom >
Manual
| Download: |  |
| Mirror Download [FCC.gov] | |
| Document ID | 200297 |
| Application ID | 2IAuEzNh515qdyWZxG8hoQ== |
| Document Description | Manual |
| Short Term Confidential | No |
| Permanent Confidential | No |
| Supercede | No |
| Document Type | User Manual |
| Display Format | Adobe Acrobat PDF - pdf |
| Filesize | 76.09kB (951116 bits) |
| Date Submitted | 2001-12-26 00:00:00 |
| Date Available | 2001-12-26 00:00:00 |
| Creation Date | 2001-06-18 17:14:44 |
| Producing Software | Acrobat Distiller 4.0 for Windows |
| Document Lastmod | 2001-12-06 08:21:33 |
| Document Title | Mini PCI Wireless Ethernet + Modem UG |
| Document Creator | Microsoft Word 9.0 |
| Document Author: | T Lukyn |
an Intel company
Wireless Ethernet + Modem
Mini PCI Adapter
User’s Guide
ii
Information in this document is subject to change without notice.
© 2001 Xircom, Inc. All rights reserved.
June 2001
Xircom reserves the right to make improvements and/or changes in the products and programs described in this
document at any time without notice.
The software described in this document is furnished under a license and may be used or copied only in accordance
with such license.
No part of this document may be reproduced or transmitted in any form or by any means, electronic or mechanical,
for any purpose, without the expressed written permission of Xircom Inc. Information in this document is subject to
change without notice. Xircom Inc makes no representations or warranties with respect to the contents or use of this
manual and specifically disclaims any express or implied warranties of merchantability or fitness for any particular
purpose. This document is to be made available only under non-disclosure.
Some of the product names herein have been used for identification purposes only and may be trademarks of their
respective companies.
Mini PCI User’s Guide
Xircom Inc
iii
Contents
SECTION 1 Hardware Installation .................................................................................................1
Introduction..........................................................................................................................1
Laptop System Requirements .............................................................................................1
Hardware Installation...........................................................................................................2
Installing the Mini PCI Adapter ............................................................................................3
SECTION 2 Software Installation .................................................................................................5
Windows Installation............................................................................................................5
Windows Modem Troubleshooting ......................................................................................5
Modem Diagnostics Tool.....................................................................................................6
Windows NT 4.0 Modem Setup Installation ........................................................................6
SECTION 3 Configuration Utility..................................................................................................7
Introduction..........................................................................................................................7
Installing the Configuration Utility ........................................................................................8
System Tray Icon.................................................................................................................8
Icon Menu............................................................................................................................9
Starting the Configuration Utility........................................................................................10
Configuration Menu ...........................................................................................................10
Setting the Profile ..............................................................................................................11
Setting the Mode ...............................................................................................................11
802.11 AdHoc Mode..........................................................................................................12
Setting the SSID ................................................................................................................12
Setting the Transmit Rate..................................................................................................12
Enabling Power Save Mode ..............................................................................................13
Selecting the Ad Hoc Channel ..........................................................................................14
Encryption Menu................................................................................................................14
Disabling Encryption..........................................................................................................15
Enabling Encryption ..........................................................................................................15
Creating Encryption Keys Using a Passphrase ................................................................15
Creating Encryption Keys Manually ..................................................................................16
Default Key ........................................................................................................................16
Link Menu ..........................................................................................................................17
About Menu .......................................................................................................................18
Appendix A Modem AT Commands ..........................................................................................19
Introduction to Modem AT Commands .............................................................................19
Special Commands ...........................................................................................................19
AT Command Reference...................................................................................................20
Modem S-Registers...........................................................................................................35
Introduction to S-Registers................................................................................................35
S-Register Reference ........................................................................................................35
Modem Result Codes ........................................................................................................41
Modem Result Codes ........................................................................................................41
Xircom Inc.
Mini PCI User’s Guide
iv
Appendix B Specifications .........................................................................................................43
Appendix C Technical Support and Warranty.........................................................................45
Appendix D Regulatory and Safety Notices ............................................................................49
Mini PCI User’s Guide
Xircom Inc
Section 1 Hardware Installation 1
SECTION 1
Hardware Installation
This section describes how to install the Wireless Ethernet and Modem Mini PCI adapter into a
PC notebook.
Introduction
•
Embedded Mini PCI adapter
•
The Mini PCI adapter is a non-user upgradeable system board device, and not an add-in card
•
Supports modem speeds up to 56Kbps using the V.90 standard
•
Supports both 10Mbps and 100Mbps Ethernet networks
•
V.90 modem is upgradeable to the V.92 specification
•
Plugs directly into to a connector directly on the PC motherboard
Laptop System Requirements
•
Up to 2 laptop internal antennas
•
AC97 Soft Modem (requires AC97 compliant Mini PCI socket)
•
Operating Systems: Windows 98SE/2000/Me/NT4.0
Xircom Inc.
Mini PCI User’s Guide
2 Hardware Installation Section 1
Hardware Installation
The Mini PCI adapter is installed in the PC by connecting the 124-pin card edge connector to the mating
connector on the PC system board.
Service should only be performed by a qualified technician.
To reduce the risk of damage to the adapter or the PC, the following precautions must be
observed when installing the adapter:
Installation should only be performed in an Electrostatic Discharge (ESD) controlled
environment. All personnel must wear a properly grounded wrist strap and an anti- static
smock while handling the card.
The work area should be free of prime static generators such as Styrofoam, Styrofoam cups,
styrene containers, any unauthorized plastic tapes or labels, any plastic items (pens, file
folders, etc.) and any synthetic or vinyl material. Necessary paperwork should be kept in a
static dissipative bag away from the card and the PC.
Masking tape, scotch tape and other adhesive tapes shall not be applied directly to the card.
Adhesive labels specified by assembly drawing or instruction may be used as directed.
Any air stream used to clean or blow off ESD sensitive items shall be ionized and static
neutral and must be checked for static generation with an Electrostatic Test sensor.
When loading or unloading conductive totes and containers, all personnel must be properly
grounded.
Care should be taken to avoid damaging the insulation tape on the adapter. Do not cut, tear,
pierce or remove the insulation tape.
Mini PCI User’s Guide
Xircom Inc
Section 1 Hardware Installation 3
Installing the Mini PCI Adapter
For additional information on how to install and remove Mini PCI cards on your computer, see
the documentation provided with the computer. The following guidelines provide similar
instructions.
J1
J2
Danger: To avoid shock hazard when installing the Mini PCI card, disconnect all cables and the
AC adapter and remove the battery pack when opening the covers of the system or attached
devices.
Caution: After installing the Mini PCI card, do not turn the computer on until the
card cover has been closed and secured. Do not operate the computer with the card
cover open.
Grasp the card only by the sides that do not contain connectors. Avoid touching any
components or connectors on the card. Do not cut, tear, pierce or remove the
insulation tape on the card.
1. Do not remove protective coverings from the card.
2. Connect the two ribbon cables to the card. Note: The connectors are keyed for correct
insertion. Do not force the connections.
3. Connect the two antenna cables to connectors J1 and J2 on the card (either cable can be
connected to J1 or J2). Note: If there is only one antenna cable, connect it to J1.
4. Position the card, with cables attached, at an angle of 20 to 30 degrees, with the contact edge
of the card aligned with the card slot (you may have to pull out the cables to achieve the
correct angle with the card).
5. Push the card into the socket and lower the card into place. Caution: Be sure cables are
positioned to prevent pinching or interference with card installation.
6. Press down on both sides of the card until the two latches click into place in the half-circle
notches on each side of the card. The latches should be fully closed and the card firmly
secured.
7. Close the Mini PCI card cover and tighten the screw. Caution: Do not turn on the computer
unless the card cover is secured.
8. Replace the battery pack.
9. Turn the computer over, open the LCD panel and connect the AC adapter.
10. Power up the computer.
11. When you power up the computer, the Microsoft Windows Operating System will recognize
the new hardware. Insert the Xircom CD-ROM and follow the Windows instructions to
install the appropriate drivers for use with the Mini PCI adapter.
Xircom Inc.
Mini PCI User’s Guide
4 Hardware Installation Section 1
12. Configure your network and communications software as required (see your network
administrator for details).
Note: If prompted during software installation to choose between an older
file currently on your computer or a newer file supplied for the Mini PCI
adapter, choose to keep the older file.
Mini PCI User’s Guide
Xircom Inc
Section 2 Software Installation 5
SECTION 2
Software Installation
This section describes how to install the software for the Mini PCI adapter.
Windows Installation
Use these instructions for a first-time installation of the Mini PCI adapter software drivers under
Windows 98SE, 2000, Me and NT4.0.
Turn on power to the computer and wait for Windows to start.
The adapter will be detected and the system will prompt for the location of driver files.
Insert the Xircom Installation CD and follow the Windows instructions to install the
appropriate drivers for use with the Mini PCI adapter. Verify the correct path to the disk, and
follow the prompts to complete the installation.
Windows will recognize the modem and driver files will be installed.
If prompted, remove the CD and reboot the system.
Proceed to Configuration Utility, Section 2, for information about configuring the Mini PCI
adapter.
Windows Modem Troubleshooting
Review this section if any of the following problems occur:
• Modem initialization errors occur when attempting to dial-out using a communications
application.
• The modem is not detected.
• Connection fails or other problems occur.
It may be necessary to define a modem type within your communications application. If the Xircom
modem is not listed, choose a “Generic Hayes compatible” device.
If your computer is equipped with an infrared communications port, you may need to disable this
port. These ports often use COM port resources required for other communications devices. Disable
the infrared port both in the computer’s CMOS or BIOS setup program and the Windows Device
Manager, as follows:
Some computers use a hardware setup utility to configure the infrared port in the BIOS. See
your computer documentation.
To disable the infrared communications port in Windows, go to Device Manager tab under
System in the Control Panel.
Double-click the Ports (COM & LPT) entry and the IR Serial Port entry. Remove the check
mark under Device Usage.
Xircom Inc.
Mini PCI User’s Guide
6 Software Installation Section 2
Modem Diagnostics Tool
Use the modem diagnostics to verify the computer-to-modem interface.
In the Modems option in Control Panel, click Diagnostics.
In Diagnostics properties, highlight the COM port associated with the Xircom modem and click
the More Info button. This causes Windows to send commands to and read responses from the
modem and display information about the modem and its COM port. The Port Information box
should display the following information:
•
The IRQ and I/O address of the modem’s COM port. These should match the physical
configuration of the port or modem adapter.
•
Modem responses to various AT commands. The Xircom modem may return ERROR for some
AT commands that are not supported. This does not indicate a failure.
Windows NT 4.0 Modem Setup Installation
Use these instructions for a first-time installation of the Mini PCI adapter software drivers under
Windows NT 4.0.
Before the modem can be installed, a COM port must be installed. Do not reboot the computer
between adding the COM port and adding the modem.
1. Turn on power to the computer and wait for Windows NT to start.
2. In the Control Panel, double-click the Ports icon.
3. Add a new COM port (e.g. COM2 serial port) and use the default settings.
4. Before you reboot the system, in the Control Panel, double-click the Modems icon.
5. Install the modem on the COM port selected in step 3.
6.
When prompted for modem drivers, insert the disk containing the driver files, verify that the
correct path to the disk, and follow the prompts to complete the installation.
7. After you install the modem, you will see Xircom Wireless Ethernet Mini-PCI Adapter in
Modems dialog of the Control Panel.
8. Finally, complete the installation by rebooting the computer.
Mini PCI User’s Guide
Xircom Inc
Section 3 Configuration Utility 7
Section 3
Configuration Utility
This section described how to use the Configuration Utility for the Mini PCI adapter.
Introduction
The WLAN Mini PCI adapter enables high-speed access to internet and intranet assets without wires.
This card uses the IEEE 802.11 protocol to enable communications between the host computer and
either another host computer or a network, using the 2.4GHz ISM Radio Band for the
communications medium. The host computer uses the adapter for communications in the same way
that it would use an Ethernet Network Interface Card (NIC).
The Configuration Utility is a Windows application that allows the user of a computer equipped with
a adapter to configure the adapter and to display the current configuration for the adapter.
Xircom Inc.
Mini PCI User’s Guide
8 Configuration Utility Section 3
Installing the Configuration Utility
The Configuration Utility is installed simultaneously with the adapter driver by executing the
utility for the Windows.exe file. The following dialog shows the first dialog.
1. Click the Finish button to install the driver and the Configuration Utility on your computer
System Tray Icon
After the installation of the Configuration Utility, an icon appears in the System Tray in the
bottom right corner of your desktop.
The red, yellow and green colors of the icon indicate the link status.
Red indicates no or very poor link quality.
Yellow indicates a usable but weak link.
Green indicates a strong link.
Mini PCI User’s Guide
Xircom Inc
Section 3 Configuration Utility 9
The status of the link can also be viewed by placing the cursor over the Configuration Utility
icon, as shown in the following illustration. This illustration indicates that the adapter is able to
communicate, but that the signal to the radio is weak.
Icon Menu
Right-clicking on the System Tool Tray Icon displays a menu similar to the following illustration:
The first two items in this menu let you turn the wireless radio on or off. Advanced
Configuration… launches the Configuration Utility application as discussed in the following
section. This lets you set configuration parameters that change the behavior of the adapter.
Remove Status Icon… removes the System Tray Icon. The driver continues to operate the card
in the last commanded configuration. The next time you power up your computer, the
configuration utility will return. You can also restart the Configuration Utility from the Start
Menu by selecting Programs and Configuration Utility.
Version Information… launches the Configuration Utility with the About page selected,
giving the revision level of the driver, configuration utility and firmware.
Wireless Network Status… launches the Configuration Utility with the Status page
selected. This shows the link status, including Signal Strength and Link Quality.
Profile: lets you create, delete, and edit profiles. A profile is a named set of
configuration parameters that can be recalled.
Computer to Computer… and Other Network… let you configure profiles for AdHoc
mode or Infrastructure Mode.
Xircom Inc.
Mini PCI User’s Guide
10 Configuration Utility Section 3
Starting the Configuration Utility
You can launch the Configuration Utility either by double-clicking (with the left mouse button)
on the Configuration Utility icon or by right clicking on the Configuration Utility icon and
selecting Advanced Configuration…
If the Configuration Utility icon is not displayed in the System Tray, you can restart the
Configuration Utility from the Start Menu by selecting Programs and Configuration Utility.
The Configuration Utility consists of four menus: Configuration, Encryption, Link, and About.
The following sections describe these menus in detail.
Configuration Menu
The Configuration menu lets you specify the operating parameters for your adapter. When you
first start the Configuration Utility, this menu is displayed. If another menu is displayed, you can
display the Configuration menu by clicking on its tab in the Configuration Utility panel.
Mini PCI User’s Guide
Xircom Inc
Section 3 Configuration Utility 11
Setting the Profile
A profile is a named set of operating parameters for your adapter. The Profile field lets you set
values for all parameters by selecting a previously defined profile. Click the down arrow at the
right of the Profile field to display the available profiles for your adapter.
You will always have at least one profile, named Default. Initially, this profile contains the
parameters configured at installation. You can modify this profile at any time after the
installation. After changing parameters, you can save them in the profile named in this field by
clicking the Apply button in the Configuration Utility panel.
You can also create additional profiles by typing a name in the Profile field. When you change
the name in the Profile field and then click the Apply button, the Configuration Utility uses the
current parameters for your card to create a separate profile. You can then switch between
profiles by clicking the down arrow at the right of the Profile field, selecting a profile from the
drop-down list, and clicking the Apply button.
The following example describes a situation in which you would want to create multiple profiles.
Suppose that you use the wireless LAN at your work, but you also have a network in your home
(with a wireless Access Point) for sharing an internet connection and a printer between several
computers. Suppose also that you have another office within your business which also has
WLAN capability, but which is configured differently than your main office.
In this situation, you can create a different profile for each of these three environments. Each
profile specifies the parameters used on a single network. Moving from one location to another,
you only need to apply the appropriate profile to be able to participate in the local network.
Setting the Mode
The adapter can operating in one of three modes, which are specified in the Mode field of the
Configuration menu. Clicking the down arrow at the right of the Mode field displays the
available modes.
Xircom Inc.
Mini PCI User’s Guide
12 Configuration Utility Section 3
802.11 AdHoc Mode
IEEE 802.11, the standard on which the WLAN protocol is based, defines two modes to handle
two separate needs. The first, called AdHoc (or IBSS) mode, is used when two or more
wirelessly-enabled PCs wish to exchange data directly, without an Access Point. In this case the
PCs can establish an AdHoc network in which they are the only members and over which they
can exchange data. To exchange data, each computer participating in the AdHoc network must
also specify the same SSID and AdHoc Channel in this menu.
Infrastructure Mode
The second mode defined by the IEEE 802.11 standard is called infrastructure mode, and is the
primary application for WLAN operation. In this mode all data on the wireless network is
directed to an Access Point, which then routes the data to the appropriate wireless station. The
Access Point may also be configured to allow data to be bridged from the wireless network to
wired networks.
To participate in a wireless LAN in infrastructure mode, every station and Access Point must
specify the same SSID. In infrastructure mode, all available channels are scanned for traffic, so
there is no need to specify a channel.
Pseudo AdHoc
A third mode has been defined by Intersil, and is used mainly for testing purposes. Pseudo
AdHoc mode allows computers to communicate even without exchanging compatibility data. For
instance, you can send broadcast frames in this mode over a given channel and expect no
interruption by beacons or other packets not involved in the test. This mode can be used for
Packet Error Rate Testing, for example, to evaluate performance.
As with AdHoc mode, each computer participating in the Pseudo AdHoc network must also
specify the same SSID and AdHoc Channel in this menu. However, note that this mode can only
be used to communicate with other adapter.
Setting the SSID
The SSID is the Service Set IDentifier used by Access Points and stations to identify a wireless
LAN. Your PRISM WLAN Interface card scans the available channels looking for an Access
Point (in infrastructure mode) or another station (in AdHoc mode) which has specified this same
SSID. It then attempts to associate with these Access Points or stations to form a wireless LAN.
To change the SSID, simply highlight it, type the new SSID, and click the Apply button.
In typical infrastructure applications a company will use a single SSID for all Access Points. If
the radio is scanning and cannot find a channel when an Access Point is known to be in range,
verify that the SSID is set correctly.
Setting the Transmit Rate
The Transmit Rate field specifies the rate at which the radio in your adapter’s transmits and
receives data. You can view the available rates by clicking the down arrow at the right of the
Transmit Rate field.
Mini PCI User’s Guide
Xircom Inc
Section 3 Configuration Utility 13
The transmit rate can be set to:
• Fully Automatic – your adapter chooses the highest available rate providing reliable
communications based on the capabilities of the Access Point or station with which it
communicates and on the received signal quality
•
Auto 1 or 2 Mb – allows only 1 and 2 Mb/s operation
•
5.5 Mb – allows only 5.5 Mb/s operation
•
11 Mb – allows only 11Mb/s operation
To change the Transmit Rate, click the down arrow at the right of the field, highlight the rate you
want to set, and click the Apply button.
Under most conditions, you should choose Fully Automatic as the transmit rate. In general, fixed
rates are used only in test environments.
Enabling Power Save Mode
The IEEE 802.11 standard provides a Power Save Mode. In this mode your adapter listens for a
beacon (a periodic frame which defines the network type and attributes) and determines the
beacon interval. Between beacons the card puts itself to sleep, enabling power savings. At the
time of the expected beacon the card wakes itself up and receives the beacon. The received
beacon contains information about whether the Access Point or station has buffered frames for
the card. If frames are available the card requests those frames until no more frames are
available. The card then goes back to sleep until the next beacon.
For Access Points that support power save mode and for stations equipped with WLAN cards,
enabling this mode can significantly reduce power consumption, which is particularly important
if the host computer is operating on battery power. However, be aware that power save mode
also results in lowered transmission and reception speed on the wireless LAN.
Xircom Inc.
Mini PCI User’s Guide
14 Configuration Utility Section 3
Selecting the Ad Hoc Channel
When communicating in AdHoc or Pseudo AdHoc mode, you must specify a channel on which
communications will take place. To specify a channel, click the up or down arrow at the right of
the AdHoc Channel field until the channel you want to set appears, and then click the Apply
button.
This field is grayed in infrastructure mode because the channel is automatically selected by the Access
Point.
Encryption Menu
The Encryption menu lets you enable encryption and set the encryption keys. To see the available
encryption methods, click the down arrow at the right of the Encryption {WEP} field.
There are two encryption methods available. The IEEE 802.11 specification defines Wired
Equivalent Privacy (WEP) using a 64-bit key. This capability was extended by the industry to
allow a 128 bit key.
If you specify an encryption method, you will only be able to communicate with Access Points
and stations that use the same encryption method and keys.
Mini PCI User’s Guide
Xircom Inc
Section 3 Configuration Utility 15
Disabling Encryption
To disable encryption, click the down arrow at the right of the Encryption field, select Disabled,
and click the Apply button.
Enabling Encryption
To enable encryption, click the down arrow at the right of the Encryption field, select either 64 bit
or 128 bit, and click the Apply button. After enabling an encryption method, you must then
specify encryption keys, as described in the following sections.
Creating Encryption Keys Using a Passphrase
To create encryption keys using a passphrase, click the radio button next to Create Key with
Passphrase and type a character string in the Passphrase field. As you type, the Configuration
Utility uses an algorithm to generate four keys used for encryption.
When you finish typing your character string and click the Apply button, the Configuration
Utility uses asterisks to mask both your passphrase and the keys it generates.
Using a passphrase to generate the four keys makes it easy to set the same keys for all members
of your wireless LAN.
Xircom Inc.
Mini PCI User’s Guide
16 Configuration Utility Section 3
Creating Encryption Keys Manually
If you want, you can create encryption keys manually by clicking the radio button next to Create
Key Manually, as shown in the following illustration.
When you click this button, the cursor appears in the field for Key 1. For 64-bit encryption, you
must type exactly 10 hexadecimal digits in each of the four key fields; for 128-bit encryption, you
must type exactly 26 hexadecimal digits. You then click the Apply button to create your
encryption keys. After you click the Apply button, the Configuration Utility uses asterisks to
mask your keys.
Default Key
The Default Key field lets you specify which of the four encryption keys you use to transmit data
on your wireless LAN. You can change the default key by clicking on the down arrow at the
right of this field, selecting the number of the key you want to use, and then clicking the Apply
button. As long as the Access Point or station with which you are communicating has the same
key in the same position, you can use any of the keys as the default.
Mini PCI User’s Guide
Xircom Inc
Section 3 Configuration Utility 17
Link Menu
The Link menu provides information on the status of your communications with the wireless
LAN.
The fields in this menu provide the following information:
•
State: shows the association state of your computer with the wireless LAN. The
above illustration shows that your computer is associated with an Access Point and
gives the Access Point’s MAC address.
•
Current Channel: shows the channel on which the connection is made. In
Infrastructure mode, this number changes as the radio scans the available channels.
•
Current Tx Rate: shows the highest transmit rate of the current association.
•
Throughput: shows the short term transmit and receive throughput in bytes/second
continuously updated.
•
Link Quality: is based on the quality of the received signal of the Access Point
beacon.
•
Signal Strength: is based on the received signal strength measurement of the
baseband processor of the Beacon signal.
You can click the Rescan button to force the radio to rescan all available channels. If your link
quality or signal strength is poor, rescanning can be used to push the radio off a weak Access
Point and search for a better link with another Access Point.
Xircom Inc.
Mini PCI User’s Guide
18 Configuration Utility Section 3
About Menu
The About menu provides information on the version of the Network Driver, the Configuration
Utility, and the firmware in the adapter. In addition, this menu also provides the MAC address of
the adapter.
Mini PCI User’s Guide
Xircom Inc
Appendix A Modem AT Commands 19
Appendix A
Modem AT Commands
This section provides the following information:
•
Introduction to Modem AT Commands
•
Special Commands
•
AT Command Reference
Introduction to Modem AT Commands
Modem AT Commands With the exception of the Special Commands, all commands must be preceded by
the AT attention code (or command prefix) and terminated by pressing the Enter key.
The modem responds with the result code OK, which means it understands and can execute the command,
or with ERROR, which means that the modem does not understand the command or that the command is
invalid.
The modem must be in command mode when any command other than the online escape sequence is
entered. Commands entered when the modem is in online mode are treated as data and transmitted as such
to the modem at the other end of the line.
Some commands are used in coordination with S-Registers.
Special Commands
+++ Online Escape Sequence
The escape sequence is used to switch to command mode from online mode during a session with a
remote modem. Type three "plus signs." The escape sequence is not preceded by the AT command prefix,
nor does it require the Enter key. The setting of S-Register S2 determines the ASCII character used.
S2=43 is the default (the "+" sign). 0-127 are valid. To disable the command, set S2 to a value greater
than 127. Use the ATO ("AT" and letter "O") command to return to online mode.
Insert a pause before and after the escape sequence to prevent misinterpretation of the escape sequence as
data. Use S-Register S12 to set the length of the pause.
A/ Repeat Last Command
The A/ command causes the modem to repeat the last command string. The command executes as soon as
/ is typed. It does not require the AT command line prefix, nor does it need to be followed by Enter.
Xircom Inc.
Mini PCI User’s Guide
20 Modem AT Commands Appendix A
AT Command Reference
A Answer
Typing ATA causes the modem to go off-hook and respond to an incoming call by generating a carrier
signal and starting the handshaking process. This must be the only command or the final command in the
command line.
If the handshaking process is successful and a connection is established, the normal CONNECT message
is displayed. If the carrier signal is not detected within the time specified in S-Register S7, a NO
CARRIER result code is displayed.
Bn Select Communications Standard
The ATBn command selects the communication standard (ITU or Bell) to be used by the modem, as
follows:
B0
Use ITU V.22 at 1200bps. B0 selects ITU V.22 at 1200bps and ITU V.21 at 300bps.
B1
Use Bell 212A at 1200bps. B1 selects Bell 212A at 1200bps and Bell 103J at 300bps.
B2
Unselect V.23 reverse channel.
B3
Select V.23 reverse channel.
B15
Selects V.21 when the modem is at 300bps (same as B0).
B16
Selects Bell103J when the modem is at 300bps (same as B1).
The ATB1 and ATB16 parameter settings are not available in some countries. Defaults are country-specific.
Break (Escape) command See Special Commands.
Cn Carrier Control
The ATCn command, where n is 1, guarantees backward compatibility with communications software that issues the
C1 command. C0 is not supported; it may set some modems to "receive only mode."
C0
Transmit carrier always off (not supported).
C1
Normal transmit carrier switching.
Dn Dial A Telephone Number The ATDn command is used to dial a telephone number. The n represents a dial
string consisting of dial digits/characters and dial modifiers (see below) and must not exceed 40 characters. Spaces,
hyphens, and parentheses can be used for clarity, but they are ignored by the modem.
The Dial command can be used for either pulse (rotary) or tone dialing. The dial digits/characters
are 0 - 9 A B C D # *. The characters A B C D and the symbols # and * represent specific tone
pairs and can be used only when tone dialing. These characters and symbols are ignored when
pulse dialing is used. Some countries restrict or prohibit the use of some of these characters.
Dial Modifiers
Dial modifiers are recognized by the modem only when they are part of a dial string following
the ATD command. Possible dial modifiers are:
L Redial Last Number
Redials last number if used as first character following ATD. Otherwise it is ignored.
Mini PCI User’s Guide
Xircom Inc
Appendix A Modem AT Commands 21
P Pulse Dialing Method
The P modifier is used with the Dial command to instruct the modem to pulse dial the telephone
number that follows.
S=n Dial a Stored Telephone Number
The S modifier instructs the modem to dial a number that had been previously stored by the use
of the AT&Zn=x command. The command to dial a stored telephone number is ATDS=n, where
n represents telephone number storage location 0 or 1. For example, ATD P S=1 pulse dials the
telephone number written to telephone number storage location 1.
, Delay Processing the Next Character
When the comma (,) modifier is included as part of the dial string following the ATD command,
the modem pauses before processing the next character in the dial string. The duration of the
pause is dictated by the contents of S-Register S8.
The , modifier is frequently inserted after the digit (usually 9) used to obtain an outside line from
a PBX to allow sufficient time for the dial tone to occur before the modem dials the telephone
number. The W modifier can be used in place of the comma.
Some countries place restrictions on the amount of time a modem may delay during dialing.
T Tone Dialing Method
The T modifier is used with the Dial command to instruct the modem to tone dial the telephone
number that follows. See also the ATT command.
W Wait for Second Dial Tone
The W modifier instructs the modem to wait for a dial tone before processing the remaining
characters in the dial string.
! Hook Flash
The ! modifier serves as a switch hook (or hook flash) signal. This causes the modem to hang up
(go on-hook) for about 0.5 seconds then return to off-hook (the actual duration of the hook flash
varies in different countries).
@ Wait for Quiet Answer
The @ modifier in a dial string instructs the modem to wait for five seconds of silence after
dialing the number. If silence is not detected, the modem sends a NO ANSWER result code to
the user.
; Return to Command Mode after Dialing
The semicolon (;) dial modifier can be used only at the end of a command line, immediately
preceding the Enter, and instructs the modem to return to the command mode immediately after
dialing and without breaking the connection with the distant modem.
Xircom Inc.
Mini PCI User’s Guide
22 Modem AT Commands Appendix A
^ Disable Data Calling Tone Transmission
The ^ modifier in a dial string disables data calling tone for the current call (calling tone is
automatically enabled in many countries). This modifier is not available in all countries.
$ Credit Card Tone Detect
The $ modifier in a dial string instructs the modem to wait for a credit card "bong" tone before
processing the remaining characters in the dial string.
En Echo Command
The ATEn command, where n represents 0 or 1, determines if the commands you issue through
the keyboard to the modem in command mode are displayed (echoed) on your computer's
monitor screen.
E0
Disable echo to the computer.
E1
Enable echo to the computer (default).
If the commands you type are not displayed on your monitor screen, your software is set to
expect character echo from the remote system. You can remedy this by typing in the command
ATE1. If the commands you type are displayed on your monitor with the characters duplicated,
LLIIKKEETTHHIISS, type in the ATE0 command.
Hn Switch Hook Options
The ATHn command hangs up the modem or prepares it for dialing.
ATH0
Causes the modem to go on-hook (default).
ATH1
Causes the modem to go off-hook (this command is restricted in some countries).
In Request ID Information
The ATI command has various options which are used to instruct the modem to provide specific
information about itself.
I0
Displays modem controller firmware revision (same as I3).
I1
Calculates ROM checksum and displays it on the DTE (for example, 12AB).
I2
Performs a ROM check and calculates and verifies the checksum. displaying OK or ERROR..
I3
Displays modem firmware revision information.
I12 Returns country code (for example, North America).
Ln Monitor Speaker Volume
The ATLn command, where n represents 0, 1, 2, or 3, is listed here for backward compatibility
reference only. The volume of the monitor speaker is controlled by the computer, not by the
modem.
Mini PCI User’s Guide
Xircom Inc
Appendix A Modem AT Commands 23
Mn Speaker On/Off Selection
The ATMn command, where n represents 0, 1, 2, or 3, enables or disables the transmission of
sound signals from the modem to the computer speaker. (Sound production also requires that the
computer speaker be enabled.)
M0
Speaker always off.
M1
Speaker on until data carrier is detected.
M2
Speaker always on when modem is off-hook.
M3
Speaker off as digits are dialed, then on after dialing until data carrier is detected.
Nn Negotiation of Handshaking Options
The ATNn command, where n represents 0 or 1, determines whether or not the sending modem
performs a negotiated handshake when the speed of the answering modem is different from that
of the sending modem.
N0
When originating or answering, handshake only at the communication standard specified by the contents of SRegister S37 and the ATBn command option selected.
When originating or answering, handshake only at the communication standard specified by the contents of SN1 Register S37 and the ATBn command option selected. During handshaking, fall back to a lower speed, if
required (default).
On Online Command
If the modem has been switched to command mode, typing in the ATO0 command will return it
to the online mode with the existing connection.
O0
Instructs modem to leave online command mode and return to data mode (see +++ Escape Sequence under
Special Commands).
O1 This setting issues a retrain command before returning to online data mode.
O2 This setting issues a rate negotiation command before returning to online data mode.
P Select Pulse Dialing
The ATP command instructs the modem to use pulse (rotary) dialing. This mode will remain in
force for all dialing procedures unless an ATT command is issued or the dial string contains a T
dial modifier.
Qn Result Code Display Options
The setting of the ATQn command, where n represents 0 or 1, determines whether or not result
codes (such as OK, CONNECT, RING, NO CARRIER, and ERROR) are displayed on your PC's
screen.
Q0
Display of result codes enabled.
Q1
Display of result codes disabled.
Xircom Inc.
Mini PCI User’s Guide
24 Modem AT Commands Appendix A
Repeat command
See Special Commands.
T Select Tone Dialing
The ATT command instructs the modem to use tone dialing. This mode will remain in force for
all dialing procedures unless an ATP command is issued or the dial string contains a P dial
modifier. Tone dialing is the factory-default setting.
Vn Result Code Format Options
The ATVn command, where n represents 0 or 1, determines if result codes are displayed as
numeric (short form) codes or words (long form). Numeric result codes contain only one or two
digits and this form could be used, for example, when the modem is controlled by a software
terminal emulation program that uses script files. See the list at the beginning of this topic
showing result codes in both long and short formats.
Type the command ATV or ATV0 to select numeric result codes. The factory default is to
display the result codes as words (ATV1). You should issue an ATV1 command either to reset
the factory default after a change has been made or to select the long-form (word) result codes.
Negotiation progress messages (extended result codes) are those with a numerical value of 40 or
more.
Four other AT commands, two dial modifiers, and an S-Register are also directly involved in the
generation and display of result codes. These are the ATQn, ATVn, ATWn, and ATXn
commands, the ATDW and ATD@ dial modifiers, and S-Register S95.
Wn Negotiation Progress Message Selection
The ATWn command, where n represents 0, 1, or 2, works in conjunction with S-Register S95 to
determine how that subset of the result codes - called negotiation progress messages or extended
result codes - will be used to report the type of connection, protocol, and other communication
techniques that resulted from handshaking and subsequent negotiation.
The options available to represent n in the ATWn command are:
W0
CONNECT result code reports DTE speed. If S-Register S95=0, disable the display of all extended result
codes.
W1
CONNECT result code reports DTE speed. If S-Register S95=0, enable the display of CARRIER and
PROTOCOL extended result codes only.
W2
CONNECT result code reports DCE (modem-to-modem) speed. If S-Register S95=0, disable the display of all
extended result codes.
Mini PCI User’s Guide
Xircom Inc
Appendix A Modem AT Commands 25
Xn Result Code Set/Call Progress Option
The ATXn command, where n represents 0-4, controls how the modem responds to dial tone and
busy signals and how it displays CONNECT result codes. The options available to specify with
the ATXn command are:
X0
Result codes 0-4 enabled. Busy detect and dial tone detect disabled.
X1
Result codes 0-5, and 10 enabled. Busy detect and dial tone detect disabled.
X2
Result codes 0-6, and 10 enabled. Busy detect disabled and dial tone detect enabled.
X3
Result codes 0-5, 7, and 10 enabled. Busy detect enabled and dial tone detect disabled.
X4
Result codes 0-7, and 10 enabled. Busy detect and dial tone detect enabled.
Caution: Some countries do not allow busy detect or dial tone detect to be disabled.
Yn Long Space Disconnect Option
The ATYn command, where n represents 0 or 1, determines whether or not the modem will
disconnect a call when it receives a long space (1.6 seconds Break) signal during a V.22bis
connection.
Y0
Disables the long space disconnect facility (supported for backward compatibility
reference only).
Y1 Enables the long space disconnect facility (not supported).
Zn Recall Stored Profile
The ATZn command, where n represents 0, disconnects any call that is currently in progress and
reloads the user configuration profile stored in nonvolatile memory as the active configuration
profile.
Z0
Disconnect and reload the profile contained in storage location 0 as the active
configuration profile.
&Bn V.32 Automatic Retrain Options
The Xircom modem always retrains. The automatic retrain feature cannot be disabled.
&B0 Disables the V.32 automatic retrain capability (not supported).
&B1
Enables the V.32 automatic retrain capability (supported for backward
compatibility only).
Xircom Inc.
Mini PCI User’s Guide
26 Modem AT Commands Appendix A
&Cn Data Carrier Detect (DCD)
The AT&Cn command, where n represents 0 or 1, selects the method by which the modem
handles the carrier detect signal.
&C0
The carrier detect signal is forced on regardless of the condition of the distant
modem's carrier.
The state of the carrier from the remote modem is monitored. The local modem's
&C1 DCD signal is on when the remote modem's carrier signal is detected, and off
when it is not (default).
&Dn Data Terminal Ready (DTR) Options
The AT&Dn command, where n represents 0-3, controls how the Data Terminal Ready (DTR)
signal is used by the modem.
&D0 Ignore the DTR signal from the computer and treat it as always on.
&D1
Monitor DTR and, when an ON-to-OFF transition of the DTR signal occurs,
switch to command mode, issue an OK result code, and remain connected.
&D2
Monitor DTR and, when an ON-to-OFF transition of the DTR signal occurs,
hang up the line and switch to command mode.
&D3
Monitor DTR and, when an ON-to-OFF transition of the DTR signal occurs,
hang up, reset the modem and switch to the initialization state.
&Fn Load Factory Settings
The AT&F command loads factory default parameters from ROM into the active configuration
profile, replacing the parameters stored there. This command must be issued by itself. If it is
used with another AT command, its function will be ignored.
&F0 Recall factory settings as active configuration.
Recall factory settings appropriate for ETC mode as active configuration. This
&F5 command enables ETC operation. It is automatically set upon detection of a
cellular phone. The following options are set with &F5:
Local Factory Settings
Function
MTC Implementation
LAPM-only error correction
\N4
Transmit level fixed per cellular phone
S92
Wait for carrier = 90 sec
S7=90
CD loss delay = 10 sec
S10=100
Auto FF/FB enabled
N/A
Start up at 9600bps
S40=2
Mini PCI User’s Guide
Xircom Inc
Appendix A Modem AT Commands 27
&Gn V.22bis Guard Tone Selection
This option is for international use only. It is not used in North America. The AT&Gn
determines which guard tone, if any, to transmit while in answer mode (transmitting in the high
band). The value of n can be 0, 1, or 2. This parameter is set automatically for most countries
that require it.
&G0
No guard tone set.
&G1
Enable RTS/CTS flow control (default).
&G2
1800-Hz guard tone set.
&Jn Auxiliary Relay Option
&J0
Auxiliary relay is never closed.
&J1
Not supported (returns ERROR).
&Kn Local Flow Control Options
The AT&Kn command, where n represents 0-4, determines how the flow control between the
computer and the local modem is handled.
&K0
Disable local flow control.
&K3
Enable RTS/CTS flow control (default).
&K4
Enable XON/XOFF flow control.
&Mn Communications Mode
The AT&Mn command, where n represents 0-4, determines how the flow control between the
computer and the local modem is handled.
&M0 Asynchronous mode (default; supplied for backward compatibility only).
&Pn Pulse Dial Make-to-Break Ratio Selection
The AT&Pn command, where n represents 0, 1, or 2, controls the ratio of the off-hook (make) to
on-hook (break) interval used by the modem when it pulse dials.
&P0
Selects 39:61 make/break ratio at 10 pps (default - U.S.).
&P1
Selects 33:67 make/break ratio at 10 pps (default - Japan).
&P2
Selects 33:67 make/break ratio at 20 pps (option - Japan).
&Qn Asynchronous Communications Mode
&Q0
Asynchronous mode, buffered (same as \N0).
&Q5
Error control mode, buffered (default; same as \N3).
&Q6
Asynchronous mode, buffered (same as \N0).
Xircom Inc.
Mini PCI User’s Guide
28 Modem AT Commands Appendix A
&Sn Data Set Ready (DSR) Options
The AT&Sn command controls the functions of the modem's DSR circuits.
&S0 The DSR signal remains on all the time the modem is powered on (default).
&S1 The DSR signal is on during handshaking and is off when carrier is lost.
&Tn Self-Test Commands
The AT&Tn command allows the user to perform diagnostic tests on the modem.
&T0 Abort. Stops any test in progress.
Local analog loop. this test verifies modem operation, as well as the connection
&T1 between the modem and computer. The modem must be off-line when this test is
run.
&T3 Local digital loopback test.
Remote digital loopback test. This test can verify the integrity of the local
&T6 modem, the communications link, and the remote modem. The modems must be
online with error control disabled when this test is run.
&V View Configuration Profile
The AT&V command displays the contents of the active configuration profile.
&Wn Write Active Profile to Memory
The AT&Wn command, where n is 0, allows you to save a copy of the current active
configuration profile to nonvolatile memory. This profile can be restored at any time by using the
ATZ command or a power-up reset of the modem.
&Yn Select Stored Profile for Hard Reset
This command is included for compatibility with applications that use the &Y0 command. It
does not affect the behavior of the modem.
&Y0
Select stored profile 0 on power up.
&Y1
Not supported, returns ERROR.
&Zn=x Store Telephone Number
The AT&Zn=x command is used to store a telephone number for later dialing using the ATDS=n
(dial stored number) command. In this command, n is 0 or 1 representing 2 storage locations and
x is the stored number. The dial string may contain up to 40 characters.
Mini PCI User’s Guide
Xircom Inc
Appendix A Modem AT Commands 29
\Gn Modem Port Flow Control
The AT\Gn command determines whether XON/XOFF flow control will be used.
\G0
Returns OK for compatibility (default).
\G1
Not supported; returns ERROR.
\Jn Adjust BPS Rate Control
\J0
Turn off feature (default).
\J1
Turn on feature.
\Kn Break Control
The AT\Kn command determines how the modem processes a Break signal received from the
local DTE during a connection (online).
\K5
Modem sends Break to remote modem in sequence with transmitted data,
nondestructive/nonexpedited (default).
\Nn Error Mode Control Selection
The AT\Nn command sets the type of error correction supported by the modem when sending or
receiving data.
\N0 Buffered mode. No error control (same as &Q6).
\N1 Buffered mode (same as \N0).
\N2 LAPM, MNP or disconnect mode. This is also known as reliable mode.
LAPM, MNP, or buffered (default). The modem attempts to connect in LAPM
error control mode. If this fails, the modem attempts to connect in MNP mode. If
\N3
this fails, the modem connects in buffered mode and continues operation. This is
also known as V.42 auto-reliable mode (same as &Q5).
\N4
LAPM or disconnect. The modem attempts to connect in LAPM error control
mode. If this fails, the call will be disconnected.
MNP or disconnect mode. The modem attempts to connect using MNP 2-4 error
\N5 control procedures. If this fails, the modem disconnects. This is also known as
MNP reliable mode.
\Qn Local Flow Control Selection
The AT\Qn command sets the type of flow control used on the serial port to adjust for
differences in modem port speed.
\Q0
Disables flow control (same as &K0).
\Q1
Sets flow control to XON/XOFF (same as &K4).
\Q3
RTS/CTS to DTE (default; same as &K3).
Xircom Inc.
Mini PCI User’s Guide
30 Modem AT Commands Appendix A
\Tn Inactivity Timer Limit
The AT\Tn command specifies length of time (in minutes) that the modem waits before
disconnecting when no data is sent or received. The time period can be set at n = 0 - 255. A
setting of zero disables the timer. As an alternative, the timer may be specified in S-Register S30.
This function is only applicable in buffer mode.
\Xn XON/XOFF Pass Through
\X0 Modem process XON/XOFF flow control characters locally (default).
\X1 Not supported; returns ERROR.
%B View Numbers in Blacklist
If blacklisting is in effect, the AT%B command displays the numbers for which the last call
attempted in the past two hours failed. In countries that do not require blacklisting, this command
returns ERROR.
%Cn Data Compression Control
The AT%Cn command determines the operation of V.42bis and MNP class 5 data compression.
Online changes do not take effect until a disconnect occurs.
%C0
V.42bis/MNP Class 5 compression disabled (no data compression).
%C1
MNP Class 5 compression enabled (no V.42bis).
%C2
V.42bis compression enabled (no MNP Class 5).
%C3 V.42bis/MNP Class 5 data compression enabled (default).
-Cn Data Calling Tone
Data calling tone is a tone of a certain frequency and cadence specified in V.25 that allows
remotes data/fax/voice discrimination. The frequency is 1300 Hz with a cadence of 0.5 seconds
on and 2 seconds off.
Disables calling tone (default).
C0
Enables calling tone.
C1
Caution: Some countries do not permit calling tone to be disabled.
+GCAP Request Complete Capabilities List Syntax:
Syntax:
AT+GCAP
AT+GCAP=?
Mini PCI User’s Guide
Xircom Inc
Appendix A Modem AT Commands 31
This command displays one or more lines of information text, in a standard format, describing
the basic capabilities of the modem. This allows a software package to determine which groups
of extended-syntax commands the modem supports. The response may contain one or more of
the following responses:
+CGSM
GSM (+C) commands.
+DS
Data Compression (+D) commands.
+ES
Error Control (+E) commands.
+FCLASS
Fax (+F) commands.
+MS
Modulation Control (+M) commands.
+W
Wireless (+W) commands.
+GCAP=? may be used to determine whether the modem supports the +GCAP command: an OK
response indicates support, ERROR indicates non-implementation.
+GCI Country of Installation
Syntax:
AT+GCI=
AT+GCI?
AT+GCI=?
This command configures the modem for the country of use, selecting operational parameters
and ensuring conformity to the requirements of the selected country's telephone network. The
+GCI parameter may only be changed when the modem is in an idle state.
Note 1: The Xircom CountrySelect utility is recommended for setting country parameters for
modem calls. The CountrySelect utility is accessible after installation at Start, Programs, Xircom
Utilities.
Note 2: To determine what countries are supported by your Xircom modem product, run the
Xircom CountrySelect utility using Start, Run, Xircom Utilities, CountrySelect, or use the
command AT+CGI=?. The AT+CGI=? command will respond with the T.35 codes for the
countries supported. The list of codes below includes countries supported by this
product at time of publication, but not all countries listed are supported by this product.
Xircom Inc.
Mini PCI User’s Guide
32 Modem AT Commands Appendix A
Caution: For units sold in Japan, Japan has been set as the default country setting. Use of any
other country setting for calls originating in Japan is a violation of local law.
To change the current country selection, use AT+GCI= (but see Notes 1 and 2
above).
Country
Country
Argentina
07
Mexico
73
Australia
09
Netherlands
7B
Austria
0A
New Zealand
7E
Barbados
0E
Norway
82
Belgium
0F
Panama
85
Brazil
16
Philippines
89
Canada
20
Poland
8A
China
26
Portugal
8B
Czech Republic
2E
Puerto Rico
8C
Denmark
31
Russia
B8
Finland
3C
Singapore
9C
France
3D
Slovakia
FC
Germany
04
Slovenia
FB
Greece
46
South Africa
9F
Guam
48
South Korea
61
Hong Kong
50
Spain
A0
Hungary
51
Sweden
A5
Iceland
52
Switzerland
A6
India
53
Taiwan
FE
Indonesia
54
Thailand
A9
Ireland
57
Turkey
AE
Israel
58
United Kingdom
B4
Mini PCI User’s Guide
Xircom Inc
Appendix A Modem AT Commands 33
Italy
59
United States
B5
Japan
00
Universal
FD
Kuwait
C2
United Arab Emirates B3
Liechtenstein
68
US Virgin Islands
FA
Luxembourg
69
Venezuela
BB
Malaysia
6C
Vietnam
BC
+GMI Request Manufacturer Identification
Syntax:
AT+GMI
AT+GMI=?
This command displays one or more lines of information text, identifying the manufacturer of
the modem. +GMI=? may be used to determine whether the adapter supports the +GMI
command: an OK response indicates support, ERROR indicates non-implementation.
+GMM Request Model Identification Syntax:
Syntax:
AT+GMM
AT+GMM=?
This command displays one or more lines of information text, identifying the modem model.
+GMM=? may be used to determine whether the modem supports the +GMM command: an OK
response indicates support, ERROR indicates non-implementation.
+GMR Request Revision Identification Syntax:
Syntax:
AT+GMR
AT+GMR=?
This command displays one or more lines of information text, identifying the revision level of
the firmware of the modem. +GMR=? may be used to determine whether the adapter supports
the +GMR command: an OK response indicates support, ERROR indicates non-implementation.
+MS Modulation Selection
Caution: The AT+MS command is not applicable under the V.90 standard for 56K modems.
To set V.90 operation, see S-Register S109.
The AT+MS parameter controls data modulations and bit rates that may be negotiated between a
local and remote modem. It accepts four subparameters.
Xircom Inc.
Mini PCI User’s Guide
34 Modem AT Commands Appendix A
Syntax: AT+MS=,,,
AT+MS?
AT+MS=?
+MS?
Reports the current settings of subparameters
+MS=?
Displays range of acceptable values for each subparameter
Specifies the preferred modulation to be used in originating or answering a connection. The
subparameter is an unquoted string of characters. If the parameter is specified, the other
subparameters will revert to factory defaults. If is omitted, any unspecified parameters will
keep their current values (for example, AT+MS=,0 or AT+MS=,,,2400).
Values accepted for are the following:
B103 Bell 103 (300bps)
B212 Bell 212A (1200bps)
V21 ITU-T V.21 (300bps)
V22 ITU-T V.22 (1200bps)
V22B ITU-T V.22bis (2400bps)
V23C ITU-T V.23 with constant carrier (1200/75 or 75/1200bps)
V32 ITU-T V.32 (4800 or 9600bps)
V32B ITU-T V.32bis (4800 - 19200bps)
V34 ITU-T V.34 (2400 - 33600bps)
K56 Lucent/Rockwell K56flex (32000 - 56000bps). Not applicable under the V.90 standard. To set
V.90, see S-Register S109.
Enables or disables negotiation of an alternative if the preferred modulation is not available.
Values accepted for are the following:
0 Disabled. Modem will disconnect if it is unable to negotiate a connection with the specified
.
1 Enabled (default). If the specified is unavailable, modem will attempt to negotiate an
alternative carrier as appropriate.
Specifies the lowest bit rate at which the modem may establish a connection. (This value is fixed at
zero for the Xircom modem.)
Specifies the highest bit rate at which the modem may establish a connection. For modulations that
support only a fixed bit rate (such as V.22bis), has a fixed value to which it defaults. If the
default rate or a rate other than zero is specified, the modem will return ERROR. This subparameter
accepts the following values: 0, 300, 1200, 2400, 4800, 7200, 9600, 12000, 14400, 16800, 19200,
21600, 24000, 31200, 33600bps. If unspecified (set to 0), is determined by the value of
.
If the setting is K56, the subparameter should be left at the default value (zero).
Mini PCI User’s Guide
Xircom Inc
Appendix A Modem AT Commands 35
Modem S-Registers
This section provides the following information:
Introduction to S-Registers
S-Register Reference
Introduction to S-Registers
The Xircom modem uses memory storage locations, or S-Registers, to hold information
controlling its operating environment. Few of these S-Registers require attention from modem
users. S-Registers are used in conjunction with Modem AT Commands.
To display the value of an S-Register, type ATSn? where n is the number of the S-Register, then
press Enter.
To modify the value of an S-Register, type ATSn=r where n is the S-Register number and r is the
new value or setting, then press Enter.
S-Register Reference
S0 Ring to Answer After
•
The contents of register S0 sets the number of rings required before the modem goes off-hook to answer an
incoming call (auto answer). The value can range from 0 to 255. ATS0=0 disables the auto-answer
function. The default is 0.
S1 Ring Counter
•
This register is read only. The value of S1 increments with each ring. If no rings occur over a six-second
interval, the register is cleared. The value of S1 can range from 0 to 255. The default is 0. There may be
country-specific limits.
S2 AT Escape Character
• Register S2 defines the ASCII character used in the Escape sequence. This command is used to return to
command mode without losing the connection with a remote modem. Default is S2=43, which is the "+"
character. Thus the default Escape sequence is +++. ASCII values 127 and below can be used. To disable
this Escape sequence, set S2 equal to a value greater than 127.
S3 Command Line Termination Character
• This register contains the ASCII value of the command line terminating character (carriage return). The
factory default value is ASCII 13 - the carriage return character. You can set register S3 to any value
between 0 and 127.
Xircom Inc.
Mini PCI User’s Guide
36 Modem AT Commands Appendix A
S4 Response Formatting Character
• This register contains the ASCII value of the line feed character. The factory default value is 10. You can
set register S4 to any value between 0 and 127. The modem uses a line feed character in command mode
when it responds to the computer.
S5 Command Line Editing Character
• This register contains the ASCII value of the backspace character and is applicable to asynchronous
transmissions only. The factory default value is 8. You can set register S5 to any value between 0 and 32,
or to 127. The modem will not recognize the backspace character if it is set to a value greater than ASCII
32.
S6 Wait Before Blind Dialing
• This register determines how long the modem waits after going off-hook before dialing the first digit.
The wait must be at least 2 seconds. Register S6 can be set to any value between 2 and 65 seconds. The
default is 2 seconds. The value of the W dial modifier will override the value in register S6. This operation,
however, may be affected by some ATX options according to country restrictions. There may be countryspecific defaults and limits.
S7 Connection Completion Time-Out
• This register determines the number of seconds the originating modem waits for a carrier signal from the
answering modem before hanging up. The timer is started when the modem finishes dialing (originate), or
goes off-hook (answer). In originate mode, the timer is reset upon detection of an answer tone if allowed by
country restriction. The timer also specifies the wait for silence time with the @ dial modifier (in seconds).
S7 is not associated with the W dial modifier. Register S7 can be set at from 1 to 255 seconds with a default
of 50 seconds. There may be country-specific defaults and limits.
S8 Duration of Pause for Comma Dial Modifier
• This register determines the number of seconds to pause for each comma (,) in a dial string or command
line. The default is 2 seconds, but any value from zero to 65 is acceptable. Defaults and limits are countryspecific.
S10 Delay Between Lost Carrier/Hang Up
• This register specifies the time (in tenths of a second) that the modem waits after carrier loss before
hanging up. The default is 20 (2.0 seconds). Register S10 will accept a value ranging from 1 to 254 in
tenths of a second (0.1 to 25.4 seconds). There may be country-specific defaults and limits.
S11 DTMF Tone Duration
• This register determines the "touch tone" dialing speed which is prefixed for each country. The value can
range from 50 to 150 milliseconds. The default is 95 milliseconds. The value of register S11 has no effect
on pulse dialing. There may be country-specific defaults and limits.
S12 Escape Guard Time
• This register sets the value (in 20 ms increments) of the required pause after the escape sequence. Range
is 0 = 255, default is 50 units of 0.02 seconds each, or one second.
S28 V.34 Modulation Enable/Disable
• This register enables or disables V.34 modulation. Default setting is 1, valid values are 0 or 1. A value of
zero disables V.34 modulation. Any other value in the range enables it.
Mini PCI User’s Guide
Xircom Inc
Appendix A Modem AT Commands 37
S30 Inactivity Timer
• The value specified by this register sets how long the modem will wait (in minutes) before disconnecting
when no data is sent or received. This function is only applicable in buffer mode. It is set by AT\Tn. Values
are 0-255. Default is 0 (disabled).
S34 DTE Throughput Limit
•
This register specifies whether the modem should limit throughput when the DTE is operating at higher
speeds (57,600 or 115,200bps)
S34=0
Do not limit throughput (default).
S34=1
Limit throughput to DTE speed.
S35 Data Calling Tone
• This register enables or disables a tone of a certain frequency and cadence as specified in V.25 that
allows remote data/fax/voice discrimination. It is set by AT-Cn. The frequency is 1300 Hz with a cadence
of 0.5 seconds on and 2 seconds off. The default is country-specific. Some countries do not allow data
calling tone to be overridden.
S35=0
Data calling tone disabled (default).
S35=1
Data calling tone enabled.
S36 Negotiation Fallback
•
This register specifies the action to be taken in the event of a negotiation failure when error control is
selected.
S36=0,2
Hang up
S36=1,3
Fall back to an asynchronous connection
S36=4,6
Attempt MNP. If MNP fails, hang up.
S36=5,7
Attempt MNP. If MNP fails, fall back to an asynchronous connection.
S37 Dial Line Rate
S37=0
Maximum modem speed (default).
S37=1
Reserved.
S37=2
1200/75bps.
S37=3
300bps.
S37=4
Reserved.
S37=5
Attempt to connect at 1200bps.
S37=6
Attempt to connect at 2400bps.
S37=7
Attempt to connect at 4800bps.
S37=8
Attempt to connect at 7200bps.
S37=9
Attempt to connect at 9600bps.
Xircom Inc.
Mini PCI User’s Guide
38 Modem AT Commands Appendix A
S37=10
Attempt to connect at 12000bps.
S37=11
Attempt to connect at 14400bps.
S37=12
Attempt to connect at 16800bps.
S37=13
Attempt to connect at 19200bps.
S37=14
Attempt to connect at 21600bps.
S37=15
Attempt to connect at 24000bps.
S37=16
Attempt to connect at 26400bps.
S37=17
Attempt to connect at 28800bps.
S37=18
Attempt to connect at 31000bps.
S37=19
Attempt to connect at 33600bps.
S40 ETC Startup Autorating
S40=0
Start up with normal autorating (default)
S40=1
Start up at initial rate of 4800 or below
S40=2
Start up at initial rate of 9600 or below
S42 Auto Rate
•
V.32bis and V.22bis auto rate is disabled. Retrain operation is disabled or enabled in date mode, and
fallback is disabled in data mode.
S42=0
Auto rate disabled.
S42=1
Auto rate enabled (default).
S43 Auto Mode
•
V.32bis startup auto mode operation disabled.
S43=0
Auto mode disabled.
S43=1
Auto mode enabled (default).
S46 Data Compression Selection
•
The setting of this register is used to turn data compression on or off. It is set by AT%Cn.
Data compression can only be enabled when the modem is operating in an error-control
(EC) mode using either V.42 LAP-M or MNP protocols.
S46=0
Modem will not attempt negotiation for data compression
S46=2
Modem will negotiate with a remote modem for data compression (default)
S46=136
Same as S46=0
S46=138
Same as S46=2
Mini PCI User’s Guide
Xircom Inc
Appendix A Modem AT Commands 39
S48 LAPM Error Control and Feature Negotiation
S48=7
Negotiation enabled.
S48=128
Negotiation disabled; forces immediate fallback options specified in S36.
The following table shows the S36 and S48 configuration settings needed to negotiate certain
types of connections.
S48=7
S48=128
S36=0,2
LAPM or hangup
Source Exif Data:
File Type : PDF
File Type Extension : pdf
MIME Type : application/pdf
PDF Version : 1.3
Linearized : No
Encryption : Standard V1.2 (40-bit)
User Access : Print, Fill forms, Extract, Assemble, Print high-res
Producer : Acrobat Distiller 4.0 for Windows
Creator : Microsoft Word 9.0
Modify Date : 2001:12:06 08:21:33-08:00
Author : T Lukyn
Title : Mini PCI Wireless Ethernet + Modem UG
Create Date : 2001:06:18 17:14:44
Page Count : 62
Page Mode : UseThumbs
EXIF Metadata provided by EXIF.tools