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Z0 : Calls the profile of the NV-RAM location area „0‟ stored by the
AT&W0 command.
Z1 : Calls the profile of the NV-RAM location area stored by the AT&W0
command.
- AT&Cn : DCD Option
Controls the RLSD (Received Line Signal Detected) DCD (Carrier Detect) signal of the serial
port. If the synchronous mode is selected, this command is ignored and it operates as if the
AT&C1 is inputted.
. Parameter : 0~1
. Default : 1
C0 : Turns on the DCD signal regardless of the carrier received from the
remote modem.
C1 : Turns on the DCD signal only when the carrier is received from the
remote modem.
- AT&Dn : DTR Option
This command obtains functions of a modem relating to the DTR signal of the serial port, in
connection with the AT&D and AT&Q (AT&M) commands.
. Parameter : n = 0 ~ 3
. Default : 2
&D0 &D1 &D2 &D3
&Q0 NONE 2 3 4
&Q1 1 2 3 4
&Q2 3 3 3 3
&Q3 3 3 3 3
&Q4 1 2 3 4
1. The modem is disconnected and the OK result code is transmitted.
2. In the case of the data mode, it enters the command mode to turn off the DTR. In
the meantime, the automatic answering function is not available.
3. The modem is disconnected and the OK result code is transmitted. During the off
status of the DTR, the automatic answering function is not available.
4. The modem is initialized. (Has the same result as the ATZ command.)
