&Q0
&Q1
&Q2
&Q3
&Q4
&Q5
&Q6
&D3
4
4
3
3
4
4
4
&D2
3
3
3
3
3
3
3
&D1
2
2
3
3
2
2
2

APPENDIX A. AT COMMANDS

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 hat follows DTR drop indicated in the following table:

&D0

NONE 1 3 3 1 NONE NONE

1Modem disconnects and sends OK result code

2Modem goes into command mode if ni data mode and sends the OK result code

3Modem disconnects, sends the OK result code, and disables auto answer while DTR is off

4Modem performs a warm start (i.e., same as ATZ command)

AT&Fn

Restore factory configuration

Default : 0

 

&F0

Recalls fa ctory 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

 

ACTIVE Professional External Modem User’s Manual

16