Multitech MultiModem MT5600ZDX User Manual page 30

4 AT Commands, S-Registers, and Result Codes
X3 Sends X1 messages with BUSY; does not look for dial tone.
X4 Sends all messages, including NO DIALTONE and BUSY.
Note: If the modem is in fax mode, the only message sent to
indicate a connection is CONNECT without a speed indication.
See also the \V command.
Command: Y n Long Space Disconnect
Values: n = 0 or 1
Default: 0
Description: Y0 Disables sending or responding to a long space break signal on
disconnect.
Y1 Enables long space disconnect. In non-error correction mode,
the modem sends a long space of four seconds prior to going
on-hook. In non-error correction mode, the modem responds
to the receipt of a long space (i.e., a break signal greater than
1.6 seconds) by going on-hook.
Command: Z n Modem Reset
Values: n = 0 or 1
Default: None
Description: The modem performs a soft reset and restores (recalls) the
configuration profile according to the parameter supplied. If
no parameter is specified, zero is assumed.
Z0 Resets modem and restores Profile 0.
Z1 Resets modem and restores Profile 1.
Note: See also the &F and &W commands.
Command: &C n Data Carrier Detect (DCD) Control
Values: n = 0, 1, 2, 3
Default: 3
Description: &C0 Forces the DCD circuit to always be high.
&C1 Forces the DCD to go high when the remote modem's carrier
signal is detected, and go low when the carrier signal is not
detected.
&C2 Forces the DCD to go high in .5 seconds after the connect
message is displayed
&C3 Forces the DCD to go high at the same time the connect
message is displayed
Command: &D n Data Terminal Ready (DTR) Control
Values: n = 0, 1, 2, or 3
Default: 2
Description: This command interprets the high to low transition of the DTR
signal sent by the computer according to the supplied
parameter. The action taken depends on the current &Q
setting.
&DO Modem ignores the true status of the DTR signal and
responds as if it is always on.
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