ADTRAN ISU 128 - Manual (Page 105)

Appendix A. AT Commands
90 ISU 128 User Manual 61202.029L2-1
Command Function
AT Command Response Message Types
V0 Numeric response messages
V1 Verbal response messages words
AT Command Connect Message Options
X0 Simple connect message
X1-7 Connect messages with bit rate
Ready-To-Send (RTS) Control Line Options
_D0 1 ms delay
_D1 18 ms delay
Service Profile Identification (SPID) Access Options
_I1 Access SPID 1
_I2 Access SPID 2
Local Directory Number (LDN) Access Options
_N0 Access LDN1
_N1 Access LDN2
ISDN Switch Protocol Options
_S0 5ESS
_S1 DMS-100
_S2 National ISDN-1
_S3 NEC
ISDN U-Interface Operational Mode Options
_X0 ISU timing slaves to network (NT)
_X1 ISU is U-interface timing master (LT)
Data Flow Control Options
\Q0 No flow control
\Q1 Software
\Q2 CTS only
\Q3 Hardware
\Q4 Software from DCE only