Multi-Tech Systems MT3334ZDX - Manual (Page 31)

3 - AT Commands, S-Registers and Result Codes
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Command: X n Result Code Selection
Values: n = 0–4
Default: 4
Description: X0 Basic Result Codes ( e.g., CONNECT); does not
look for dial tone or busy signal.
X1 Extended Result Codes ( CONNECT 33600 V42bis,
etc.); 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.
Command: Y n Long Space Disconnect
Values: n = 0
Default: 0
Description: Y0 Disable sending or responding to long space break
signal on disconnect.
Y1 Enable sending or responding to long space break
signal on disconnect. (Not supported.)
Command: Z n Modem Reset
Values: n = 0 or 1
Default: None
Description: Z0 Reset modem to profile saved by the last &W
command.
Z1 Same as Z0.
Command: &C n Data Carrier Detect (DCD) Control
Values: n = 0 or 1
Default: 1
Description: &C0 Ignores the state of carrier on the remote modem
and DCD circuit is always on.
&C1 DCD turns on when the remote modem’s carrier
signal is detected and DCD is off when the carrier
signal is not detected.