The modem ignores al l characters
that precede AT .
OTE
N
:
A maximum of 255 char acters
can follow t he AT command. The
modem doesn't count t he AT
prefix or carri age r eturn (<cr>)
character. It does count, but
doesn't act on, punctuation such
as quotation mar k s and tildes. If a
command sequence exceeds the
255-character maxim um , the
modem does not execute any part
of the command line and returns
an error message after the <cr>.
If this occurs, reentering the
command withi n the 255character limit executes the
command.
OTE
N
:
Punctuation in the telephone
number does take up space set
aside for command storage.
OTE
N
:
Word codes are preceded and
followed by the characters set in
registers S3 and S4, which are
typically the factory defaults: a
carriage return and a line feed
(LF) cont r ol character,
respectively.
.
CHAPTER 1— U
.
SING MODEM COMMANDS
.
.
.
Entering a Command
.
.
Use the following guidelines when issuing modem commands:
.
xWhen using AT commands, start every command line (except the A/ and +++ commands)
.
.
.
.
.
.
.
.
with the attention (AT) code characters; otherwise, the modem will not execute the
command.Compaq Hardware
xType commands following the AT prefix in uppercase or lowercase letters or a combination
of both.
xAlways type the AT prefix in the same case (not At or aT).
.
xEnter telephone numbers with or without punctuation; for example,
.
.
.
(123) 456-7890 or 1234567890
.
.
Editing and Executing a Command
.
.
If you make an error while typing a command, simply backspace over the mistake then retype.
.
You cannot backspace over the AT prefix because it is interpreted immediately after it is typed.
.
.
To execute a command line, press the
.
process the command line.)
.
Enter
key. (Pressing the
Enter
key tells the modem to
.
.
.
Omitting a Parameter in a Command Line
.
.
If you enter a command that normally includes a numeric parameter, such as ATHn, without the
.
numeric parameter, the missing parameter is assumed to be the default parameter.
.
.
For example, the Hn (hang-up) command can have a numeric parameter of zero
.
the default, or of one
.
equivalent of
.
ATH0
(H1);
plus the
however, if the parameter is missing,
Enter
key. This rule does not apply to the D (dial) command.
ATH
plus the
H0),
(
Enter
which is
key is the
.
.
Repeating a Command
.
.
You can repeat the last command line issued by entering the A/ command. Because it also
.
repeats the AT prefix and the
.
.
press the
Enter
key when repeating this command.
Enter
key function, you are not requi re d to e nt er t he AT prefi x or
.
.
The last previously entered command remains in the command buffer until the modem is reset or
.
power to the modem is turned off. Both actions clear the buffer and make the A/ command
.
invalid since there is no command for the modem to repeat.
.
.
.
Understanding Result Codes
.
.
A result code is modem response to a command and may be issued in either of two possible
.
formats: words (the long form, also known as verbose) or numeric characters (the short form,
.
represented by digits). The result code format is set using the Vn command.
.
.
V1 (default) for words.
.
.
.
.
OTE
N
:
Numeric characters are followed
by a carriage return.
OTE
N
:
The word modem comes from the
process of MOdulation/
DEModulation.
OTE
N
:
The escape code sequence (+++)
must be typed wi thin one second,
or as defined in t he Escape Code
Guard Time found in S12.
NOTE:
To hang up the modem,
type ATH0 and pres s
Enter.
:
+,7(3$3(5
(cont.)
.
.
.
.
.
V0 for numeric characters.
.
.
.
Using Online Mode
.
.
In the online mode, the transmitting modem receives characters from the computer, converts the
.
data to analog signals then transmits these signals over the telephone line.
.
.
The process of altering a signal for transmission is called modulation. The receiving modem
.
receives analog signals from the telephone when in the online mode and converts or demodulates
.
the signal, returning it to the digital form that can be used by the computer.
.
.
.
Escaping from an Online Session to the Command Mode
.
.
Use the following steps to break out of a data transfer session (online mode) and return to
.
command mode:
.
.
Press and hold the
.
.
An OK result code is displayed.
.
.
Enter modem commands as needed.
.
.
Resume online session by entering AT0 command or terminate the connection with the ATH0
.
command.
.
Shift
key and type +++
.
.
Creating a Command Mode Shortcut
.
.
An easy way to issue commands to the modem is via HyperTerminal, included with Windows 95
.
and Windows NT. You can create a shortcut for accessing HyperTerminal and sending
.
commands to the modem. To create a command mode shortcut on the Windows desktop:
.
.
1.Create a Command Mode icon.
.
.
2.From the HyperTerminal dialog box, click the Command icon.
.
.
3.Click File==>Create Shortcut
.
.
.
.
.
.
or
Click the right mouse button.
A Command Mode Shortcut icon is displayed.
4.Click and drag the shortcut icon to the desktop.
.
5.To quit HyperTerminal, click File==>Exit.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
NOTE:
The internal m odem us es the
COM2 port in the system.
NOTE:
To hang up the modem, type
ATH0 and press
Enter.
:
+,7(3$3(5
(cont.)
.
.
.
Creating a Command Mode Icon
.
To create a command mode icon using HyperTerminal:
Use Windows HyperTerminal to
enter Command M ode and
register the phone w ith the
modem.
NOTE:
$M3
is not support e d by this
modem.
:
+,7(3$3(5
(cont.)
.
.
.
CHAPTER 2— B
.
ASICS OF CELLULAR PHONE USE
.
.
.
Connecting the Modem to a Cellular Phone
.
The internal modem installed in the Armada 7000 Family of Personal Computers allows you to
.
.
connect a cellular phone in North America to your computer using an optional cable and the 25-
.
pin connector on the computer. There are AT commands associated with setting up and
.
optimizing a cellular connection.
.
.
.
.
.
.
.
.
CAUTION:
modem. Contact your Compaq authori zed dealer , r esel l er , or s ervi ce
provider for inform ati on on pur chasi ng a cel lul ar cabl e desi gned f or t hi s
modem. For a list of phone cabl es that ar e compat i bl e with your m odem,
refer to “Compatible Cell ul ar Phones with Compaq Cables ” i n the OnlineReference Guide that is preinstalled on your com puter .
Using the wrong cable could cause permanent dam age t o the
.
.
Choosing Cellular Direct Components
.
.
If you are using a cellular phone, you need to purchase the following items separately:
.
.
.
.
.
.
.
One of the models of cellular phones supported by this modem.
x
Cellular phone connection cable. (Contact your Compaq authorized reseller or service
x
provider.)
Cellular airtime. (Contact a cellular carrier in your area.)
x
.
.
.
Registering the Phone with the Modem
.
.
When the modem was installed at the factory, it was not programmed to automatically expect a
.
cellular phone connection. If you anticipate using a cellular phone with the modem, proceed as
.
follows to register or setup the cellular phone with the modem.
.
.
.
.
.
.
Use
x
Use
x
Use
x
if you are using a Motorola, JVC, or Pionee r phone
$M1
if you are using a Nokia, Technophone, AT&T (selected models), or Tandy phone
$M2
if you are using a GE or Ericsson phone
$M4
.
.
.
This command needs be to issued only once; thereafter, the modem checks for the presence of
.
the phone. If a cellular phone is connected, the modem dials through the cellular phone;
.
.
otherwise, it uses a standard (RJ-11) telephone connector.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
:
+,7(3$3(5
(cont.)
.
.
.
CHAPTER 3— B
.
.
(DSVD)
.
ASICS OF DIGITAL SIMULTANEOUS VOICE AND DATA
.
.
Digital Simultaneous Voice and Data Using AT Commands
.
.
The internal modem is equipped for digital simultaneous voice and data (DSVD) connections
.
with oth e r DSVD c o m p atible modems, as well as for voice-only and data-only calls. Using
.
DSVD technology, and the computer’s speakerphone capability, a voice call can be added during
.
.
a data transfer, or computer information can be sent during a voice conversation, all over a single
.
phone line.
.
.
The speakerphone must be enabled for you to hear the voice portion of a DSVD voice and data
.
call. The speakerphone is automatically turned on when the following applications are started:
.
.
xWindows HyperTerminal
.
xMicrosoft NetMeeting
.
.
xIntel ProShare
.
.
.
Using Windows or DSVD Application Software
.
.
The following instructions appl y when you a re using m ode m dri ve rs from Wi ndows to
.
communicate with the modem. If you are using a communications application other than
.
.
Windows to initiate a DSVD call, refer to the software documentation for instructions on
Any command that f ollows the A
command on the same command
line is ignored.
:
+,7(3$3(5
(cont.)
.
.
.
CHAPTER 4—AT C
.
.
.
.
Basic AT Commands
.
.
.
Answer Command (A)
.
.
.
.
.
.
.
This command causes the modem to answer a call without waiting for a ring. This is useful
in manually answering a call or when making a direct connection with another modem.
When this command is entered, the modem will attempt to register with a cellular phone (if
selected) to receive incoming calls.
Parameters: none
.
.
.
Attention Code (AT)
.
.
.
.
This command is the command line prefix that tells the modem a command or sequence of
commands is being entered. It precedes all commands except the A/ (repeat) and +++
(escape) commands.
.
.
.
Entered alone, AT causes the modem to respond with OK or 0 if it is ready to receive
commands.
.
.
Parameters: none
.
.
Bell/ITU Mode Selection (B)
.
.
.
.
This command sets the modem to either Bell or ITU mode (1200 bps, 300 bps).
Parameters: 0, 1, 2-3, 15, 16
.
.
.
.
.
.
.
.
.
.
.
.
n = 0ITU V.22 mode; al so c aus e s B 15 to be pe rformed.
n = 1Bell 212A mode; al so c ause s B16 to be performed
(Default).
n = 2 or 3V.23 R1200/T75 when modem i s originating; V.23
T1200/R75 when modem i s answering.
n = 15ITU V.21 mode.
n = 16Bell 103 mode.
.
Character Echo (E)
.
.
.
.
.
.
.
.
.
.
.
This command disables or enables the local echo of entered characters while the modem is
in the command (terminal) mode.
Parameters: n = 0, 1
n = 0Disables local echo.
n = 1Enables local echo
(Default).
.
.
.
.
.
OMMANDS
NOTE:
In pulse dialing, characters A, B,
C, D, and # are ignored.
:
+,7(3$3(5
(cont.)
.
.
Determine Data Rate Negotiation (N)
.
.
.
.
.
.
This command determines if the modem performs rate negotiated handshake
with remote modem at connection
Parameters: 0, 1
.
.
.
.
.
.
.
.
.
.
n = 0Automode disabled; handshake only at the rate
specified by the DTE rate. S37, *H, and the J dial
modifier.
n = 1Automode enabled; handshake at or below the rate
specified by the DTE rate. S37, *H, and the J dial
modifier
(Default).
.
.
Dial Command (D)
.
.
This command causes the modem to dial the number that follows D in the command line.
.
.
Identification/Checksum Option (I)
.
.
.
.
.
This command interrogates the modem for its product code, checksum, or ROM revision
code.
Parameters: 0, 1, 2, 3, 9
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
n = 0
n = 1Requests control firmware checksum (8 bit).
n = 2Verifies control firmware checksum; responds OK or
n = 3Requests ROM revis i on c ode f ormatt e d as: XXXXXX
n = 9Requests ROM revision and c o untry code. For
Requests product code
ERROR result code.
NNN PASS (data pump date and revision code)
XXXXXX NNN PASS (ASIC date and revision c o de )
XXXXXX NNN PASS (control firmware date and revision
code). The date codes are i n yymmdd format, and
the revision codes are 3-digit numbers.
example, Compaq N. NN US A w here N. NN de fi nes the
revision code fo r t he ROM and report s the selected
DAA.
.
.
Long Space Discon nect (Y)
.
.
.
.
.
.
.
.
This command enables/disables the generation and response to long space disconnect.
Parameters: 0, 1
n = 0
n = 1Enables long s p ac e disconnect.
Disables long space disconnect
.
.
.
.
.
(Default)
.
(Default)
.
:
+,7(3$3(5
(cont.)
.
.
Negotiation Progress Result Code (W)
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
This command determines whether or not to return negotiation progress result codes.
Parameters: 0, 1, 2
n = 0DTE speed on CONNECT; CARRIER and PROTOCOL
disabled
n = 1DTE speed on CONNECT; CARRIER and PROTOCOL
enabled.
n = 2DCE speed on CONNECT; CARRIER and PROTOCOL
disabled.
Online Data Mode (O)
This command forces the modem to the online data mode. Use this command to return to the
online mode after "escaping" to the command mode.
Parameters: 0, 1, 3
(Default)
.
.
.
.
n = 0Enters online data mode.
n = 1Enters online data m o de w i th a retrai n.
.
.
n = 3Enters online dat a m o de w ith a rate renegotiation.
.
.
Read/Write an S Register (S)
.
.
.
.
.
.
.
.
.
.
This command sets the register r to the specified value n.
The Sr? command reads (displays) the value in register r.
Parameters:
Range (r):0-110
Range (n):register specific
.
Recall St ored Profile (Z)
.
.
.
.
.
.
.
.
.
.
.
.
This command resets the modem, recalls the specified user profile from nonvolatile memory
(NVRAM), and places it in the active configuration area.
Parameters: 0, 1
n = 0Reset modem and recall parameters stored in user
profile 0.
n = 1Reset modem and recall parameters stored in user
profile 1.
.
Repeat Last Command (A/)-
.
.
.
.
.
.
.
.
This command causes the modem immediately to repeat the previous command such as
redialing a telephone number. The previously executed command remains in the command
buffer until AT is entered or power is turned off. Both actions clear the buffer and make the
A/ command invalid since there is no command to repeat. It is not necessary to enter either a
<cr> or AT.
87). Other features are the
same as those for X0, plus
CONNECT result codes are
enabled.
n = 2Result c ode s 0-6, 10-14, 86,
and 87. The features are
the same as those for X0
and X1 except dial tone
detection is enabled.
Disconnect occurs and
the NO DIAL TONE resul t
code is sent if a minimum,
1-second duration dial
tone is not detected
within 5 se c onds a ft e r
going off-hook or after the
end of the wait period.
Busy tone detection is
disabled.
.
.
Result Code Display (Q)
.
.
.
.
.
.
.
.
This command enables the modem to send result codes.
Parameters: 0, 1
n = 0
n = 1 Disa b les return of re s u lt codes.
.
Result Code Form (V)
.
.
.
.
.
.
.
.
This command determines the type of result code. The Vn command determines if the result
code is sent as words or numbers.
Parameters: 0, 1
n = 0Resu lt co de is sen t a s n u mbers.
.
.
n = 3Result c ode s 0-5, 10-14, 86,
and 87. The features are
the same as those for X0
and X1 except busy tone
detection is enabled. The
modem disconnects and
sends a BUSY result code if
a busy tone is detected.
Dial tone detection is
disabled.
n = 4Result c ode s 0-7, 10-14, 86,
and 87. Both busy tone
and dial tone detectio n
are enabled
n = 9Result c ode s 0-7, 10-14, 25,
26, 86, 87. Both busy tone
and dial tone detectio n
are enabled.
To turn off the speaker
completely, us e the M0 command.
:
+,7(3$3(5
(cont.)
.
.
Speaker Control (M)
.
.
.
.
.
.
.
.
Parameters: 0, 1, 2, 3
n = 0Always off.
n = 1
n = 2Always on.
On until carrier is de tect ed
.
.
n = 3On a ft er d ia lin g; of f wh en carrier d etect ed .
.
.
Speaker Volu me (L)
.
.
.
.
.
This command has no effect on modem operation. However, it will be accepted for
compatibility. Speaker volume is controlled by the host computer.
Parameters: n = 0, 1, 2, 3
.
.
Switch Hook Control (H)
.
.
.
.
.
.
.
This command initiates a hang-up sequence. When the H1 command is entered, the modem
will attempt to register with a cellular phone (if selected) to receive incoming calls. If a
cellular phone is found, an ERROR result is returned since it is not possible to go off-hook
with a cellular phone. While ERROR is returned, the modem is registered with the cellular
phone. Ignore the ERROR result i n thi s ca se.
.
.
Parameters: 0, 1
.
.
.
.
.
n = 0
n = 1Modem will go off-hook; it will pick up the telephone
The modem will go on-hook; it will hang up
line.
.
.
Tone Dial (T)
.
.
.
This command sets the dialing mode to tone. All calls will remain tone until pulse dialing is
selected.
.
.
Parameters: none
.
.
.
Ampersand AT& Commands
.
.
.
Data Carr ier Detect (&C)
.
.
.
.
This command controls the modem's use of the DCD pin of the DTE interface.
Parameters: 0, 1, 2
.
.
.
.
.
.
.
.
n = 0DCD always ON.
n = 1
n = 2UNIX compatible DCD control. DCD is always ON
This command selects how the modem will control data set ready (DSR).
Parameters: 0, 1, 2
n = 0
n = 1DSR will become active after answer tone has been
n = 2DSR will become active at the end of handshake
DSR will remain on at all times
detected and inactive at hang - up.
(before the CONNECT message is issued), and
inactive at hang-up.
Data Terminal Ready (&D)
This command controls the modem use of the DTR pin of the DTE interface.
.
.
Parameters: 0, 1, 2, 3
.
.
.
.
.
.
.
.
.
.
.
.
n = 0The modem ig no res DTR.
n = 1The modem enters the command mode when the
DTR is turn e d O FF.
n = 2The modem enters the command mode, disables
auto-answer, and hangs up when DTR is turned OFF
(Factory Defa u l t)
n = 3The modem resets to user-specified configuration
when the DTR is turned OFF.
.
.
Error Control and Speed Buffering (&Q)
.
.
.
.
This command selects communications modes.
Parameters: 0, 5, 6
.
.
n = 0
.
.
.
.
.
.
.
.
.
n = 5
n = 6Asynchronous wi t h s p e e d b uf fe ri ng . Allows fixed DTE-
.
.
.
Asynchronous mode, no speed buffering.
disables all flow control (including modem-to-modem
flow control), suppresses the CARRIER and PROTOCOL
result codes, and causes the CONNECT result code to
indicate the DCE speed regardless of the W
command and register S95 settings.
Error cont ro l mode wit h speed buffe ring
DCE speed to keep applications program from
changing UART data rate to match the modem
transmission rate after connection.
.
.
.
.
.
.
Reliable communications over cellular networks or other impaired channels require error
control. Therefore &Q5[jump to the Cellular ($S Register) section] should always be in
effect when using cellular direct connection or when communicating over impaired
noncellular phone lines.
.
.
.
.
.
(Default)
.
.
&Q0
(Default)
.
Loading...
+ 42 hidden pages
You need points to download manuals.
1 point = 1 manual.
You can buy points or you can get point for every manual you upload.