AT Command Sets (continued)
4.3 DIAL CODES
The following chart shows the Model 2190 dial codes and dial
functions.
Dial Codes
\Nn
\Vn
AT\N0
AT\N1
AT\N2
AT\N3
AT\N4
AT\N5
AT\V0
AT\V1
Operating Mode
Selects normal speed buffered mode.
Selects direct mode.
Selects reliable
Selects auto reliable (error-correction) mode.
Selects LAP-M error-correction mode.
Selects MNP error-correction mode.
Single Line Connect Message Enable
Connect messages are controlled by the command
settings X, W, and S95.
Connect messages are displayed in the single line
format.
+MS
Select Modulation
This extended-format command selects the modulation
and, optionally, enables or disables automode,
specifies the lowest and highest connection rates,
selects u-Law or A-Law code type, and enables or
disables robbed bit signaling generation (server
modem) or detection (client modem) using one to five
subparameters. The command format is:
AT+MS=<mod>
,[<automode>][,[<min_rate>][,[<max_rate][,[<x_law]
[,[<rb_signaling>]]]]]] <CR>
+++
The Escape Code
The Escape Code returns the modem to the command
state from the online state, without releasing the
telephone line.
Command
Description
Dial Code
Dial Functions
0-9
Dialing digits 0 to 9.
*
The ”star” digit. (tone dialing only)
#
The ”gate” digit. (tone dialing only)
A-D
DTMF digits A,B,C, and D. Some countries may prohibit
sending of these digits during dialing.
L
Re-dial last number. The modem will re-dial the last valid
telephone number. The ”L” must be immediately after
the ”D” with all the following characters ignored.
P
Select pulse dialing. pulse dial the numbers that follow until
a ”T” is encountered.
T
Select tone dialing. Tone dial the numbers that follow until a
”P” is encountered.
R
This command will be accepted, but not acted on.
S=n
Dial the number stored in the directory (n = 0 to 3). (See
AT&Zn=m)
!
Flash, the modem will go on-hook for a time defined by the
value of S register 29.
W
Wait for dial tone. The modem will wait for dial tone before
dialing the digits following ”W”. If dial tone is not detected
within the time specified by S register 7 or 6, the modem
will abort the rest of the sequence, return on-hook, and
generate an error message.
@
Wait for silence. The modem will wait for at least 5 seconds
of silence in the call progress frequency band before
continuing with the next dial string parameter. If the
modem does not detect these 5 seconds of silence before the
expiration of the call abort timer (S register 7), the modem
will terminate the call attempt with a ”NO ANSWER”
message. If busy detection is enabled, the modem may
terminate the call with the ”BUSY” result code. If answer
tone arrives during execution of this parameter, the modem
handshakes.
&
Wait for AT&T ”bong” tone for credit card dialing tone
before continuing with the dial string. If the bong is not
detected within the time specified by S register 7 or 6 , the
modem will abort the rest of the sequence, return on-hook,
and generate an error message.
,
Dial pause. The modem will pause for a time specified by S
register 8 before dialing the digits following ”,”.
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