Data Terminal Ready - ADTRAN Express 3000 SP User Manual

AT Commands List
(Type and then type the command.)
AT
Command Function
Break in. Break in AT command processor during an active call.
+++
The break in key is defined in S2.
Resets unit.
_Z
Restores factory defaults.
_F
Carrier Detect (CD) Control Line Option s
Command Function
CD forced on.
&C0
CD normal.
&C1
CD off with local disconnect (LOCD).
&C2
CD off with link down.
&C3

Data Terminal Ready

(DTR Control Line Options )
Command Function
Ignore DTR.
&D0
DTR off forces command.
&D1
Idle when off. DTR off forces idle. (On allows auto answer.)
&D2
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Appendix A. AT Commands and S-Registers
(Continued)
Express 3000 SP User Manual A-5