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Chapter 4 - AT Commands, S-Registers, Result Codes
17
MultiModemDID User Guide
Command: T Tone Dialing
Values: P, T
Default: T
Description: Configures the modem for DTMF (touch-tone) dialing. Dialed
digits are tone dialed until a P command or 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 Displays result codes as words (verbose response).
Command: W
n
Result Code Options
Values:
n
= 0, 1, 2
Default: 2
Description: W0
CONNECT
result code reports serial port speed, disables
protocol result codes.
W1
CONNECT
result code reports serial port speed, enables
protocol result codes.
W2
CONNECT
result code reports line speed, enables protocol
result codes.
Command: X
n
Result Code Selection
Values:
n
= 0–7
Default: 4
Description: X0 Basic result codes (
e.g., CONNECT
); does not look for dial
tone or busy signal.
X1 Extended result codes (
e.g., CONNECT 46000 V42bis
); does
not look for dial tone or busy signal.
X2 Extended result codes with
NO DIALTONE
; does not look for
busy signal.
X3 Extended result codes with
BUSY
; does not look for dial tone.
X4 Extended result codes with
NO DIALTONE
and
BUSY
.
X5 Extended result codes with
NO DIALTONE
and
BUSY
.
X6 Extended result codes with
NO DIALTONE
and
BUSY
.
X7 Basic result codes with
NO DIALTONE
and
BUSY
.
Command: Z
n
Modem Reset
Values:
n
= 0 or 1
Default: None
Description: Z0 Resets modem to profile saved by the last &W
command.
Z1 Same as Z0.
Command: &C
n
Data Carrier Detect (DCD) Control
Values:
n
= 0, 1, or 2
Default: 1
Description: &C0 Forces the DCD circuit to be always high.
&C1 DCD goes high when the remote modem’s carrier signal is
detected, and goes low when the carrier signal is not detected.
&C2 DCD drops on disconnect for time set by S18, then goes high
again (for some PBX phone systems).