WTI MT5634 Manual de usuario
WTI Part No. 13513
Rev. A
MT5634
Internal Modem
AT Command Set
i
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
2. AT Command Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
3. AT Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
3.1 Escape AT Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-16
4. S-Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
5. Result Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
6. Remote Configuration and Country Code Configuration . . . . . . . . . . . . . . . . . . . . . 6-1
6.1. Remote Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
6.1.1. Basic Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
6.1.2. Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
6.1.2.1. Changing the Setup Password . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2
6.1.2.2. Changing the Remote Escape Character . . . . . . . . . . . . . . . . . . 6-2
6.2. Country Code Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3
ii
MT5634 Modem; AT Command Set
1-1
1. Introduction
The AT commands are used to control the operation of your modem. They are
called AT commands because the characters AT must precede each command
to get the ATtention of the modem.
AT commands can be issued only when the modem is in command mode or
online command mode.
• The modem is in command mode whenever it is not connected to another
modem.
• The modem is in data mode whenever it is connected to another modem
and ready to exchange data. Online command mode is a temporary state in
which you can issue commands to the modem while connected to another
modem.
• To put the modem into online command mode from data mode, you
must issue an escape sequence (+++) followed immediately by the AT
characters and the command, e.g., +++ATH to hang up the modem. To
return to data mode from online command mode, you must issue the
command ATO.
To send AT commands to the modem you must use a communications
program, such as the HyperTerminal applet in Windows 98 and NT 4.0, or
some other available terminal program. You can issue commands to the modem
either directly, by typing them in the terminal window of the communications
program, or indirectly, by configuring the operating system or communications
program to send the commands automatically. Fortunately, communications
programs make daily operation of modems effortless by hiding the commands
from the user. Most users, therefore, need to use AT commands only when
reconfiguring the modem, e.g., to turn auto answer on or off.
The format for entering an AT command is ATXn, where X is the command
and n is the specific value for the command, sometimes called the command
parameter. The value is always a number. If the value is zero, you can omit it
from the command; thus, AT&W is equivalent to AT&W0. Most commands
have a default value, which is the value that is set at the factory. The default
values are shown in Section 3.
You must press [Enter] (it could be some other key depending on the terminal
program) to send the command to the modem. Any time the modem receives a
command, it sends a response known as a result code. The most common result
codes are OK, ERROR, and the CONNECT messages that the modem sends
to the computer when it is connecting to another modem. See a table of valid
result codes at the end of this chapter.
1-2
MT5634 Modem; AT Command Set
You can issue several commands in one line, in what is called a command
string. The command string begins with AT and ends when you press [Enter].
Spaces to separate the commands are optional; the command interpreter
ignores them. The most familiar command string is the initialization string,
which is used to configure the modem when it is turned on or reset, or when
your communications software calls another modem.
2-1
2. AT Command Summary
Organization of AT Commands on the following pages: 1st, by the initial
command character (&, +, %), 2nd, alphabetized by the second command
character (Except for listing of AT).
Command Description
AT Attention Code
A Answer
A/ Repeat Last Command
BnCommunication Standard Setting
DsDial
DS=yDial Stored Telephone Number
EnEcho Command Mode Characters
FnEcho Online Data Characters
HnHook Control
InInformation Request
MnMonitor Speaker Mode
NnModulation Handshake
OnReturn Online to Data Mode
P Pulse Dialing
QnResult Codes Enable/Disable
Sr=nSet Register Value
Sr? Read Register Value
T Tone Dialing
VnResult Code Format
WnResult Code Options
XnResult Code Selection
ZnModem Reset
&CnData Carrier Detect (DCD) Control
&DnData Terminal Ready (DTR) Control
&EnXON/XOFF Pass-Through
&FnLoad Factory Settings
&GnV.22bis Guard Tone Control
&KnFlow Control Selection
&LnLeased Line Operation
&PnPulse Dial Make-to-Break Ratio Selection
&QnAsynchronous Communications Mode
&SnData Set Ready (DSR) Control
&TnLoopback Test (V.54 Test) Commands
&V Display Current Settings
&WnStore Current Configuration
&Zy=xStore Dialing Command
\AnSelect Maximum MNP Block Size
2-2
MT5634 Modem; AT Command Set
Command Description
\BnTransmit Break
\KnBreak Control
\NnError Correction Mode Selection
\QnFlow Control Selection
\TnInactivity Timer
\VnProtocol Result Code
-CnData Calling Tone
%AnAdaptive Answer Result Code Enable
%B View Numbers in Blacklist
%CnData Compression Control
%DCnAT Command Control
%EnFallback and Fall Forward Control
%HnDirect Connect Enable
%RnCisco Configuration
%SnCommand Speed Response
$EBnAsynchronous Word Length
$DnDTR Dialing
$MBnOnline BPS Speed
$SBnSerial Port Baud Rate
#CBAnCallback Attempts
#CBDnCallback Delay
# CBF? Callback Failed Attempts Display
# CBFR Callback Failed Attempts Reset
# CBInLocal Callback Inactivity Timer
# CBNy=nStore Callback Password
# CBPnCallback Parity
# CBRyCallback Security Reset
# CBSnCallback Enable/Disable
#PnSet 11-bit Parity
#SxEnter Setup Password
#S=xStore Setup Password
+VDR=x, yDistinctive Ring Report
+++AT<CR> Escape Sequence
%%%ATMTSMODEM<CR> Remote Configuration Escape Sequence
3-1
3. AT Commands
Command: AT Attention Code
Values: N/A
Description: The attention code precedes all command lines except A/,
A: and escape sequences.
Command: [Enter] Key
Values: N/A
Description: Press the [Enter] (RETURN) key to execute most
commands.
Command: A Answer
Values: N/A
Description: Answer call before final ring.
Command: A/ Repeat Last Command
Values: N/A
Description: Repeat the last command string. Do not precede this
command with AT. Do not press [Enter] to execute.
Command: Bn Communication Standard Setting
Values: n = 0–3, 15, 16
Default: 0 and 15
Description: B0 Select ITU-T V.22 mode when modem is at 1200 bps.
B1 Select Bell 212A when modem is at 1200 bps.
B2 Deselect V.23 reverse channel (same as B3).
B3 Deselect V.23 reverse channel (same as B2).
B15 Select V.21 when the modem is at 300 bps.
B16 Select Bell 103J when the modem is at 300 bps.
3-2
MT5634 Modem; AT Command Set
Command: Ds Dial
Values: s = dial string (phone number and dial modifiers)
Default: none
Description: Dial telephone number s, where s may up to 40 characters long
and include the 0–9, *, #, , B, C, and D characters, and the L, P, T,
V, W, S, comma (,), semicolon (;), !, @, ^ and $ dial string
modifiers.
Dial string modifiers:
L Redial last number. (Must be placed immediately
after ATD.)
P Pulse-dial following numbers in command.
T Tone-dial following numbers in command (default).
V Switch to speakerphone mode and dial the following
number. Use ATH command to hang up.
W Wait for a new dial tone before continuing to dial.
(X2, X4, X5, X6, or X7 must be selected.)
, Pause during dialing for time set in register S8.
; Return to command mode after dialing. (Place at end
of dial string.)
! Hook flash. Causes the modem to go on-hook for
one-half second, then off-hook again.
@ Wait for quiet answer. Causes modem to wait for a
ringback, then 5 seconds of silence, before
processing next part of command. If silence is not
detected, the modem returns a NO ANSWER code.
^ Disable data calling tone transmission.
$ Detect AT&T call card “bong” tone. The character should
follow the phone number and precede the user’s call card
number: ATDT1028806127853500$123456789
Command: DS=y Dial Stored Telephone Number
Values: y = 0–2 (0–1 for SMI-Parallel {internal})
Default: none
Description: Dial a number previously stored in directory number y by the
&Zy=x command. Example: ATDS=2
Command: En Echo Command Mode Characters
Values: n = 0 or 1
Default: 1
Description: E0 Do not echo keyboard input to the terminal.
E1 Do echo keyboard input to the terminal.
Command: Fn Echo Online Data Characters
Values: n = 1
Default: 1
F0 Enable online data character echo. (Not supported.)
F1 Disable online data character echo (included for
backward compatibility with some software).
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1
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