Filter
Top Products
APPENDIX A. AT COMMANDS
ACTIVE Professional External Modem User’s Manual
16
a handshaking sequence, the call and answer can be aborted
by receiving any character from DTE.
AT&Cn * RS232-C DCD option Default : 1
AT&C0 DCD is ON regardless of the state of the data carrier from the
remote modem
AT&C1 DCD follows the state of the data carrier from the remote
modem
AT&Dn * RS232-C DTR option Default : 2
Determines actions taken by the modem in relation to the DTR signal of
the serial port.
The action for the event that follows DTR drop indicated in the
following table:
&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
&Q5 NONE 2 3 4
&Q6 NONE 2 3 4
1 Modem disconnects and sends OK result code
2 Modem goes into command mode if in data mode and
sends the OK result code
3 Modem disconnects, sends the OK result code, and disables
auto answer while DTR is off
4 Modem performs a warm start (i.e., same as ATZ command)
AT&Fn Restore factory configuration Default : 0
&F0 Recalls factory default as V.42bis auto-reliable mode
&F1 Recalls factory default as MNP 5 auto-reliable mode
&F2 Recalls factory default as DIRECT mode
AT&Gn * Set guard tone Default : 0
AT&G0 No guard tone
AT&G1 550 Hz guard tone
AT&G2 1800 Hz guard tone
AT&Jn * Telephone jack selection Default : 0
This command is only included for compatibility and performs no function.
AT&J0 Performs no function
AT&J1 Performs no function
AT&Kn * DTE/modem flow control Default : 3
AT&K0 Disables flow control
AT&K3 Enables RTS/CTS flow control