ADTRAN Express 3010 Manual page 78

Appendix A. AT Commands and S-Registers
Local Directory Number (LDN) Access Options
_N0 Access LDN1 for DTE #1
_N1 Access LDN2 for DTE #2
ISDN Switch Type Options
_S0 5ESS
_S1 DMS-100
_S2 National ISDN-1
_S3 NEC
_S4 EuroISDN
ISDN U-interface Operational Mode Options
_X0 Express timing slaves to network (NT mode)
_X1 Express is U-interface timing master (LT mode)
_Z Resets unit.
Data Flow Control Options
\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
A-8 Express 3010/3110 User Manual 61200239L1-20