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4 AT Commands, S-Registers, and Result Codes
26
MultiModemZPX 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, or 2
Default: 2
Description: W0 CONNECT result code reports DTE (serial port) speed,
disables protocol result codes.
W1 CONNECT result code reports DTE (serial port) speed, enables
protocol result codes.
W2 CONNECT result code reports DCE (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.