CHAPTER 2: AT Commands
7
Command:
S
r
=
n
Set Register Value
Values:
r
is the S-Register number
Default:
None
Description:
Sets value of register S
r
to
n
, where
n
is entered in decimal format (for
example, S0=1). If the short form AT=
n
is used, the value is written to
the last accessed S-Register.
Command:
S
r
?
Read Register Value
Values:
r
is the S-Register number
Default:
None
Description:
Reads value of register S
r
and displays it in 3-digit decimal format.
S2? gives the response 043. If the short form AT? is used, the last
accessed S-Register is read.
Command:
T
Tone Dialing
Values:
P, T
Default:
None
Description:
Forces DTMF (touchtone) dialing until a P command or P dial
modifier is received.
Command:
V
n
Result Code Format
Values:
n
= 0 or 1
Default:
1
Description:
V0
Displays result codes as digits (terse response).
V1
Display result codes as words (verbose response).
Command:
W
n
Connect Message Control
Values:
n
= 0, 1, or 2
Default:
0
Description:
W0
The CONNECT result code reports the serial port speed only.
W1
The CONNECT result code reports the line speed, the error
correction protocol, and the serial port speed, respectively.
W2
The CONNECT result code reports the line speed only.
Command:
X
n
Result Code Selection
Values:
n
= 0–4
Default:
Country Dependent
Description:
Selects the result message subset that the modem will use to inform the
computer of the results of commands.
X0
Sends OK, CONNECT, RING, NO CARRIER, ERROR, and NO
ANSWER; does not look for dial tone or busy signal.
X1
Sends X0 messages and connect speed; doesn’t look for dial
tone or busy signal.
X2
Sends X1 messages with NO DIALTONE; does not look for
busy signal.
X3
Sends X1 messages with BUSY; does not look for dial tone.
X4
Sends all messages, including NO DIALTONE and BUSY.
Содержание MD1650A-JP
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