|
| KINGMAX |
56K - V90 |
FAXMODEM MANUAL |
 
- If you are experiencing problems in regards to your Kingmax Modem,
(which is unlikely, but you never know;-)
- The manual which is also on the supplied CD, is printed below.
BUT please do not hesitate to return to us with all your notebook and
equipment for us to solve the problem free of charge to you, if you purchased it from
us.
This Federal Communications Commission Statement
This equipment has been tested and found to comply with the limits for a Class B digital
device, pursuant to part 15 of the FCC
Rules. These limits are designed to provide reasonable protection against harmful
interference in a residential installation. This
equipment generates, uses and can radiate radio frequency energy and, if not installed and
used in accordance with the
instructions, may cause harmful interference to radio communications. However, there is no
guarantee that interference will not
occur in a particular installation. If this equipment does cause harmful interference to
radio or television reception, which can be
determined by turning the equipment off and on, the user is encouraged to try to correct
the interference by one or more of the
following measures:
— Reorient or relocate the receiving antenna.
— Increase the separation between the equipment and receiver.
— Connect the equipment into an outlet on a circuit different from that to
which the receiver is connected.
— Consult the dealer or an experienced radio/TV technician for help.
　
You are cautioned that changes or modifications not expressly approved by the party
responsible for compliance could void your authority to operate the equipment.
　
　
Declaration of Conformity with CTR 21
This equipment has been approved to Commission Decision 98/482//EC – CTR 21
for pan-European single terminal connection to the Public Switched Telephone Network
(PSTN). However, due to differences between the individual PSTNs provided in different
countries, the approval does not, of itself, give an unconditional assurance of successful
operation on every PSTN termination point.
In the event of problems, you should contact your equipment supplier in the first
instance.
　
　
　
Table of Contents
Chapter 1. Introduction
1.1 Production Description
1.2 Technology Overview
Chapter 2. Installing the V.90 Fax/Modem PC Card
2.1 What's in the Package
2.2 System Requirements
2.3 Installing the V.90 Fax/Modem PC Card to a Notebook
2.4 Windows 95 Plug and Play Installation
2.5 Windows 95 OSR2 Plug and Play Installation
2.6 Windows 98 Plug and Play Installation
2.7 DOS / Windows 3.1 Installation
2.8 Windows NT4.0 Plug and Play Installation
2.9 Installing the Communication Software
Chapter 3. AT Command Reference
3.1 Overview
3.2 Special Commands
3.3 AT Commands
3.4 S-Registers Reference
　
　
Chapter 1. Introduction
1.1 Production Description
Thank you for purchasing the V.90 Fax/Modem PC Card.
V.90 Technology
V.90 technology is developed to achieve data rates beyond V.34 33.6 kbits/s on connections
between an analog
(client) modem and a digital (central-site) modem. This is accomplished by recognizing
that this connection is
fundamentally different from traditional analog point-to-point modem connection. A
modulation designed specifically for
this type of connection utilizes the available bandwidth to achieve up to 56 kbits/s. With
this technology, the
downstream data rate to the analog modem is higher than the upstream data rate to the
service provider. On
connections where the central-site modem is not V.90 capable, the client modem will
automatically fall back to
K56flex or V.34.
This modem is ideal to support the evolving 56 kbits/s modem technology as it is FLASH
downloadable. As standards
evolve and technology matures, users can upgrade their drivers to capitalize on the latest
developments.
1.2 Technology Overview
How Traditional Modems Work
Traditionally, the PSTN (public switched telephone network) has been regarded as a pure
analog phone network. But
in reality, this is not the case. Over the past few decades, the PSTN has gradually
transformed into a digital network.
And at present, the only part of the phone network which is still analog is the connection
between each residence and
the community’s central office.
V.34 modems view the entire network as purely analog, hence, repetitive analog-to-digital
conversion and vice versa
takes place when transmitting data over the network. Such conversions result in quality
degradation of the transmitted
data and sometimes the data gets corrupted.
How V.90 Modems Work
As for modems using the V.90 technology, they see the PSTN as a mostly digital network.
Many ISPs and
corporations nowadays have connection to the digital portion of the PSTN, and V.90
technology takes advantage of
that high speed digital connection. Digital to analog conversion happens only once, which
is when your computer
receives data from the local central site. By viewing the PSTN as a digital network, V.90
is able to achieve
downstream speeds (from the Internet to your computer) of up to 56Kbps.
Upstream transmissions from the computer to the network still flow at the conventional
rate of 33.6Kbps. The
upstream direction remains slower because an analog to digital conversion must still be
made when sending data from
your computer to the central site.
Backwards Compatible
V.90 modems are still compatible with other communication standards like ITU V.34. If a
client computer or server
does not support V.90, the modem will automatically switch to K56flex or V.34.
　
Chapter 2. Installing the V.90 Fax/Modem PC Card
2.1 What's in the Package
Please check whether the following items are in your package:
i.V.90 fax/modem PC card
ii.Phone line cable
iii.CD-ROM (Fax/Modem Card driver, Fax/Modem communication software, Fax/Modem Card User's
manual)
iv.Quick installation guide
2.2 System Requirements
The minimum and recommended system requirements for the V.90 fax/modem are as follows:
a.A PC Notebook/Computer equipped with PCMCIA Release 2.1 or later Type II slot
b.4MB or higher RAM
c.Card and Socket Services Software (if not using Windows 95 or later)
d.A standard RJ-11 phone line
e.DOS, Windows 3.1, Windows NT4.0, Windows 95 or Windows 98
2.3 Installing the V.90 Fax/Modem PC Card to a Notebook
To install the V.90 fax/modem PC card to your notebook :
1.Insert the card into the PCMCIA socket. When inserting the modem card, its 68-pin
connector should face the
PCMCIA slot.
2.Plug the provided Phone Line Cable to the 4-pin connector on the modem card.
3.Plug the other end of the Phone Line Cable to an RJ-11 phone jack.
Figure 2-3.1 Insert the V.90 Fax/Modem PC Card into the Socket
2.4 Windows 95 OSR2 Plug and Play Installation
Follow the procedure below to install the V.90 fax/modem card to Windows 95 OSR2.
1.Turn on your computer and start up Windows 95 OSR2.
2.When Windows 95 OSR2 has finished its startup, insert the fax/modem card properly into
the PCMCIA socket.
3.The Update Device Driver Wizard should then appear. Click the Next button.
Figure 2-4.1 Update Device Driver Wizard
4.The Select Other Location dialog box will then appear. Type D:\DRIVER or E:\DRIVER,
depending on which
CD-ROM drive you are using. Then, click OK.
Figure 2-4.2 Select Other Location
5.The following dialog box will appear when Windows 95 OSR2 finds your fax/modem driver :
Figure 2-4.3 Found Fax/Modem Driver
6.Click the Finish button in the Update Device Driver Wizard to complete the installation.
2.5 Windows 98 Plug and Play Installation
Follow the procedure below to install the V.90 fax/modem card to Windows 98.
1.Turn on your computer and start up Windows 98.
2.When Windows 98 has finished its startup, insert the fax/modem card properly into the
PCMCIA socket
3.The Add New Hardware Wizard should then appear. Please click the Next button.
Figure 2-5.1 Add New Hardware Wizard
4.The Add New Hardware Wizard will recommend you to Search for the best driver for your
device. Please
click the Next button.
Figure 2-5.2 Search for the best driver
5.Please insert the fax/modem card driver disk into your CD-ROM drive, select CD-ROM drive
and Specify a
location, and then click Next.
Figure 2-5.3 Select CD-ROM Drives
6.The Add New Hardware Wizard will search your CD-ROM drive and find PC_CARD.INF, please
click Next for
setup.
Figure 2-5.4 Driver file PC_CARD.INF found
7.Now Windows 98 has finished installing the fax modem software, click Finish to complete
the installation.
2.6 DOS/Windows 3.1 Installation
First, make sure that the Card and Socket Services driver are already installed in your
system. This driver software
allows your notebook to access the PCMCIA slots. If you still do not have them on your
system, refer to your
notebook’s manual for installation instructions or seek assistance from your
supplier.
Once you are certain that the Card and Socket Services drivers are present in your system,
insert the V.90
fax/modem PC card into your notebook PCMCIA slot and install your communication software
program.
After installation, you can start using the communication software. Make sure that the COM
port setting of the
communication software is the same as in Card and Socket Services.
2.7 Windows NT4.0 Installation
Follow the procedure below to install the V.90 fax/modem PC card to Windows NT4.0.
1.Insert the V.90 fax/modem PC card properly into the PCMCIA socket before power on your
system.
2.Bootup Windows NT 4.0 Workstation and login.
3.Double-click My Computer, and go to Control Panel.
4.Double-click Modems on Control Panel and then select Don't detect my modem and then
click Next.
Figure 2-7.1 Install new modem
5.Please insert the CD-ROM disk into your CD-ROM drive, click Have Disk
Figure 2-7.2 Install From Disk
6.Type D: \ DRIVER or E: \ DRIVER in the Install from Disk and then click OK.
Figure 2-7.3 Install From Disk
7.Select Models: PCMCIA 56Kbps FAX + Modem, and then click the Next button.
Figure 2-7.4 Install New Modem
8.Select the COM port, for example COM2, and then click Next.
Figure 2-7.5 Install New Modem
9.Please provide location information and then click Next. For example…
Figure 2-7.6 Provide Location Information
10.Windows is now ready to install the best driver for this device. Click Finish to
complete the installation.
Figure 2-7.7 Install New Modem
2.8 Installing the Communication Software
Your package comes with a fax/modem software and manual. Refer to the accompanying manual
for instructions on
installing the fax/modem software.
　
Chapter 3. AT Command Reference
3.1 Overview
This chapter describes how to use the modem commands available for your modem. A modem
command must
always be preceded by the AT command prefix and terminated by pressing the Enter key (with
the exception of the
Special Commands described in section 3.2).
After you issue a modem command, your modem will respond with the result code OK, meaning
that 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.
Your 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.
3.2 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 AT
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 prefix, nor does it need to be followed by
Enter.
　
3.3 AT Commands
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 Bell 103J when the modem is at 300bps (same as B1).
Note :The ATB1 and ATB16 parameter settings are not available in some countries. Defaults
are country-specific.
Break (Escape) command
See section 3.2, 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.
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 a
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 comma 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.
^ 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 call 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 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, type in the ATE0 command.
Fn Online Data Character Echo command
The ATFn command determines whether the modem will echo data from the DTE. This modem does
not support the F0
version of the command. To ensure backward compatibility, the modem will accept F1.
F0 Online data character echo enabled (not supported; returns ERROR)
F1 Online data character echo disabled
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
I9 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 laptop computer, not by the modem.
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 the S-Register S37 and the ATBn command option selected.
N1 When originating or answering, handshake only at the communication standard specified
by the contents of the S-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 section 3.2, 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 (suc as OK,
CONNECT, RING, NO CARRIER, and ERROR) are displayed on your PC screen.
Q0 Display of result codes enabled.
Q1 Display of result codes disabled.
Repeat command
See section 3.2, 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.
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 Progess 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.
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.
Note :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 V.90 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).
&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.
&C1 The state of the carrier from the remote modem is monitored. The local
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.
&F5 Recall factory settings appropriate for ETC mode as active configuration. This
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
&Gn V.22bis Guard Tone Selection
This option is for international use only. It is not used in North America. The AT&Gn
command 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 550-Hz guard tone set
&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
&K1 Reserved
&K2 Reserved
&K3 Enable RTS/CTS flow control (default)
&K4 Enable XON/XOFF flow control
&Mn Asynchronous Communication 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)
&M1 Reserved
&M2 Reserved
&M3 Reserved
&M4 Reserved
&Pn Pulse Dial Make-to-Break Ratio Selection (Japan only)
The AT&Pn command, where n represents 0 or 1, 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)
&P1 Selects 33:67 make/break ratio at 10 pps
&P2 Selects 33:67 make/break ratio at 20 pps
&Qn Asynchronous Communications Mode
&Q0 Asynchronous mode, buffered (same as \N0)
&Q1 Reserved
&Q2 Reserved
&Q3 Reserved
&Q4 Reserved
&Q5 Error control mode, buffered (default; same as \N3)
&Q6 Asynchronous mode, buffered (same as \N0)
&Q7 Reserved
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.
&T1 Local analog loop. This test verifies modem operation, as well as the connection
between the modem and computer. The modem must be off-line when this test is run.
&T3 Local digital loopback test.
&T6 Remote digital loopback test. This test can verify the integrity of the local
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 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.
\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,
non-destructive/non-expedited (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.
\N3 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 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.
\N5 MNP or disconnect mode. The modem attempts to connect using MNP 2-4 error control
procedures. If this fails, the modem disconnects. This is also known as the MNP relaible
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)
\Q2 RTS/CTS to DTE (default; same as &K3)
\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
This command determines the poeration of V.42bis and MNP class 5 data compression. Online
changes do not take
effect until a disconnect occurs first.
%C0 V.42bis/MNP 5 disabled. No data compression.
%C1 V.42bis/MNP 5 enabled. Dtat compression ensbled (default)
-Cn Data Calling Tone
Data calling tone is a tone of a certain frequency and cadence specified in V.25 that
allows remote data/fax/voice
discrimination. The frequency is 1330 Hz with a cadence of 0.5 seconds on and 2 seconds
off.
-C0 Disables calling tone (default)
-C1 Enables calling tone
Note : Some countries do not permit calling tone to be disabled.
+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: 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: 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.
　
3.4 S-Registers Reference
S-Registers Definitions
S-registers generally affect how the AT commands perform. Contents of the registers can be
displayed or modified
when the modem is in command mode.
To display the value of an S-Register:
TYPE: ATSn? where n is the register number.
PRESS: ENTER
To modify the value of an S-Register:
TYPE: ATSn=r
where n is the register number, and r is the new register value.
PRESS ENTER
S0 Auto Answer Ring Number
This register determines the number of rings the modem will count before automatically
answering a call. Enter 0
(zero) if you do not want the modem to automatically answer at all. When disabled, the
modem can only answer with
an ATA command.
Range: 0 - 255
Default: 0
Units: rings
S1 Ring Counter
This register, ring counter, is read only. The value of S1 is incremented with each ring.
If no rings occur over a
six-second interval, this register is cleared.
Range: 0 - 255
Default: 0
Units: rings
S2 AT Escape Character (User Defined)
This register determines the ASCII values used for an escape sequence. The default is the
+ character. The escape
sequence allows the modem to exit data mode and enter command mode when on-line. Values
greater than 127
disable the escape sequence.
Range: 0 - 255
Default: 43
Units: ASCII
S3 Command Line Termination Character (User Defined)
This register determines the ASCII value used as the carriage return character. This
character is used to end
command lines and result codes.
Range: 0 - 127, ASCII decimal
Default: 13 (carriage return)
Units: ASCII
S4 Response Formatting Character (User Defined)
This register determines the ASCII value used as the line feed character. The modem uses a
line feed character in
command mode when it responds to the computer.
Range: 0 - 127, ASCII decimal
Default: 10 (line feed)
Units: ASCII
S5 Command Line Editing Character (User Defined)
This register sets the character recognized as a backspace and pertains to asynchronous
only. The modem will not
recognize the backspace character if it is set to a value that is greater than 32 ASCII.
This character can be used to
edit a command line. When the echo command is enabled, the modem echoes back to the local
DTE the backspace
character, an ASCII space character, and a second backspace character. This means a total
of three characters are
transmitted each time the modem possesses the backspace character.
Range: 0 - 32, 127
Default: 8 (backspace)
Units: ASCII
S6 Wait Before Dialing
This register sets the length of time, in seconds, that the modem must wait (pause) after
going off-hook before dialing
the first digit of the telephone number. The modem always pauses for a minimum of two
seconds, even if the value of
S6 is less than two seconds. The wait for dial tone call progress feature (W dial modifier
in the dial string) will override
the value in register S6. This operation, however, may be affected by some ATX options
according to country
restrictions.
Range: 2 - 65
Default: 2
Units: seconds
S7 Connection Completion Time-Out
This register sets the time, in seconds, that the modem must wait before hanging up
because carrier is not detected.
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 the 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.
Range: 1 - 255
Default: 50
Units: seconds
S8 Comma Dial Modifier Time
This register sets the time, in seconds, that the modem must pause when it encounters a
comma (,) in the dial
command string.
Range: 0 - 65
Default: 2
Units: seconds
S10 Automatic Disconnect Delay
This register sets the length of time, in tenths of a second, that the modem waits before
hanging up after a loss of
carrier. This allows for a temporary carrier loss without causing the local modem to
disconnect.
The actual interval the modem waits before disconnecting is the value in register S10.
Range: 1 - 254
Default: 20
Units: 0.1 seconds
S11 DTMF Dialing Speed
This register determines the dialing speed which is prefixed for each country.
Range: 50 - 150
Default: 95
Units: 0.001 seconds
S12 Escape Guard Time
This register sets the value (in 20 ms increments) of the required pause after the escape
sequence (default 1 s).
Range: 0 - 255
Default: 50
Units: 0.02 seconds
S14 General Bit Mapped Options Status
Indicates the status of command options. Only bit 2 and bit 5 are used, read only.
Bit 3 Result codes (Vn)
0 = Numeric (V0)
1 = Verbose (V1) (Default)
Bit 6 Pulse dial PPS selection (&Pn)
0 = 10 PPS (&p0, &p1) (Default)
1 = 20 PPS (&p2)
Default: 8 (000010000b)
S21 V.24/General Bit Mapped Options Status
Indicates the status of command options. Only bits 3, 4 and 5 are used, read only.
Bits 3-4 DTR behavior (&Dn)
0 = &D0 selected
1 = &D1 selected
2 = &D2 selected (Default)
3 = &D3 selected
Bit 5 DCD behavior (&Cn)
0 = &C0 selected
1 = &C1 selected (Default)
Default: 48 (00110000b)
S22 Results Bit Mapped Options Status
Indicates the status of command options. Only bits 4, 5 and 6 are used, read only.
Bits 4-6 Result codes (Xn)
0 = X0 selected
4 = X1 selected
5 = X2 selected
6 = X3 selected
7 = X4 selected (Default)
Bit 7 Pulse dial make/break ratio (&Pn)
0 = 33/67 make/break ratio (&P1, &P2) (Default)
1 = 39/61 make/break ratio (&P0)
Default: 112 (01110000b)
S24 Timer to Control Sleep Mode
This command displays the number of seconds of inactivity (no characters sent from the
DTE, no RING) in the off-line
command state before the modem places itself into standby mode. A value of zero prevents
standby mode.
Note: If a number between 1 and 4 is entered for this register, it will set the value to
5, and the inactivity before
standby will be 5 seconds. This is done for compatibility with previous products which
allowed time-outs down to 1 s.
Range: 0, 5 - 255
Default: 60
S28 V.34 Modulation Enable/Disable
This register enables/disables V.34 modulation.
0 = disabled, 1 - 255 = enabled
Range: 0 - 255
Default: 1
S30 Inactivity Timer
S30 specifies the length of time (in minutes) that the modem will wait before
disconnecting when no data is sent or
received. This function is only applicable in buffer mode.
Range: 0 - 255
Default: 0
Units: minutes
S32 Synthetic Ring Volume
This register specifies a synthetic ring volume in dB with an implied minus sign.
Range: 0 - 255
Default: 10
S33 Synthetic Ring Frequency
This register specifies a synthetic ring frequency. Valid ranges are 0-5, with 0 =
disabled and 1-5 corresponding to 5
ring frequencies.
Range: 0 - 5
Default: 0
S35 Data Calling Tone
Data calling tone is a tone of certain frequency and cadence as specified in V.25 which
allows remote data/FAX/voice
discrimination. The frequency is 1300 Hz with a cadence of 0.5 s on and 2 s off.
0 = disabled, 1 = enabled
Range: 0 - 1
Default: 0
S36 Negotiation Fallback (Default 7)
This register specifies the action to take in the event of 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 asynchronous connection.
S37 Dial Line Rate (Default 0)
S37 = 0 maximum modem speed
S37 = 1 reserved
S37 = 2 1200/75 bits/s
S37 = 3 300 bits/s
S37 = 4 reserved
S37 = 5 1200 bits/s
S37 = 6 2400 bits/s
S37 = 7 4800 bits/s
S37 = 8 7200 bits/s
S37 = 9 9600bps
S37 = 10 12000bps
S37 = 11 14400bps
S37 = 12 16800bps
S37 = 13 19200bps
S37 = 14 21600bps
S37 = 15 24000bps
S37 = 16 26400bps
S37 = 17 28800bps
S37 = 18 31200bps
S37 = 19 33600bps
S38 56K Dial Line Rate (Default 1)
There are 2 new S-registers for 56K. S38 sets the maximum 56K downstream speed that the
modem attempts to
connect. To disable 56K, set S38 to 0. S37 register is used to control the upstream V.34
rate. (ref. V.34 data/FAX
document).
S38 = 0 56K disabled
S38 = 1 56K enabled - automatic speed selection - maximum modem speed
S38 = 2 32000 bits/s
S38 = 3 34000 bits/s
S38 = 4 36000 bits/s
S38 = 5 38000 bits/s
S38 = 6 40000 bits/s
S38 = 7 42000 bits/s
S38 = 8 44000 bits/s
S38 = 9 46000 bits/s
S38 = 10 48000 bits/s
S38 = 11 50000 bits/s
S38 = 12 52000 bits/s
S38 = 13 54000 bits/s
S38 = 14 56000 bits/s
S38 = 15 58000 bits/s
S38 = 16 60000 bits/s
　
New Usage Information
S38 Downstream rate selection for V.90 mode
0 V.90 disabled 12 42666
1 V.90 autorate 13 44000
2 29333 14 45333
3 30666 15 46666
4 32000 16 48000
5 33333 17 49333
6 34666 18 50666
7 36000 19 52000
8 37333 20 53333
9 38666 21 54666
10 40000 22 56000
11 41333
S109 Automode selection
0 V.PCM disabled
1 K56flex or V.90
2 V.90 only (K56flex disabled)
S40 ETC Startup Autorating (Default 0, Range 0-2)
S40 = 0 Start up with normal autorating.
S40 = 1 Start up at initial rate of 4800 or below.
S40 = 2 Start up at initial rate of 9600 or below.
Range: 0 - 2
Default: 0
S42 Auto Rate (Default 1, Range 0-1)
This command is used for testing and debugging only.
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.
0 = auto rate disabled, 1 = enabled.
Range: 0 - 1
Default: 1
S43 Auto Mode (Default 1, Range 0-1)
This command is used for testing and debugging only.
V.32bis startup auto mode operation disabled.
0 = auto mode disabled, 1 = enabled.
Range: 0 - 1
Default: 1
S48 LAPM Error Control and Feature Negotiation (Default 7)
S48 = 7 Negotiation enabled
S48 = 128 Negotiation disabled; forces immediate fallback options specified in S36.
The following chart lists the S36 and S48 configuration settings necessary to negotiate
certain types of connections.
　
S48 = 7
S48=128
S36 = 0,2
LAPM or hangup
do not use
S36 = 1,3
LAPM or async
Async
S36 = 4,6
LAPM, MNP, or hangup
MNP or hangup
S36 = 5,7
LAPM, MNP, or async
MNP or async
S89 Timer to Control Sleep Mode
This register displays the number of seconds of inactivity (no characters sent from DTE,
no RING) in the off-line
command state before the modem places itself into standby mode. A value of zero prevents
standby mode.
Note: If a number between 1 and 4 is entered for this register, it will set the value to
5, and the inactivity before
standby will be 5 seconds. This is done for compatibility with previous products which
allowed time-outs down to 1 s.
Range: 0, 5 - 255
Default: 60
S90 Local Phone Status
This register tells the status of the local phone. It is read only.
0 = local phone on-hook
1 = local phone off-hook
S91 Line Transmit Level
This register is effective only for Japan. It specifies the line transmit level in dB with
an implied minus sign.
Range: 6 - 15
Default: 14
Units: 1 dB
S92 Direct Connect Transmit Level (Default 20)
Sets the transmit level, in dBm, for direct connect. This value may have different
settings for different phones.
　
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