ADTRAN 3000 - Manual (Page 106)

Appendix A. AT Commands and S-Registers
A-8 Express 3000 User Manual 61203153L2-20
AT Command Connect Message Options
Command Function
X1-7 Connect messages with DTE rate.
Ready-To-Send (RTS) Control Line Options
Command Function
_D1 18 mS delay.
ISDN Switch Type Options
Command Function
_S1 DMS-100.
_S2 National ISDN-1.
Data Flow Control Options
Command Function
\Q0 No flow control.
\Q1 Software flow control (XON/XOFF).
\Q2 CTS only.
\Q3 Hardware flow control (RTS/CTS) factory default.
\Q4 Software from DCE only.
DTE and Modem Interface Selection
Command Function
_L0 Disable external analog modem connected to the Express 3000
modem port.
_L1 Enable external analog modem connected to the Express 3000
modem port.