ADTRAN Express 3100 User Manual page 89

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
61200240L2-20
Appendix A. AT Commands and S-Registers
Express 3100 User Manual A-5