Table B-7. Dbu Options At Commands For V.34 Card - ADTRAN DSU IV ESP User Manual

Appendix B. AT Commands
Front Panel
Error Control
1= BUFFERED
2= DIRECT
3= RELIABLE MNP
4= AUTO MNP
5= RELIABLE V.42
6= REL. V.42/MNP
7= AUTO V.42\MNP \N6
Flow Control
1= Disabled
2= XON/XOFF
3= CTS ONLY
4= RTS/CTS
5 = UNI XON/XOFF \Q4
B-10

Table B-7. DBU Options AT Commands for V.34 Card

AT Command Description
\N0 Normal operation. No error control. Allows
speed matching, buffering, and flow con-
trol.
\N1 Direct operation. No error control, no buff-
er, and no flow control.
\N2 Reliable MNP Operation. Uses MNP Error
Control.
\N3 Auto-reliable MNP operation. Tries MNP
error control first; uses normal operation if
necessary.
\N4 Reliable V.42 (LAPM) operation. Uses
V.42 (LAPM) error control. If V.42 (LAPM)
error control cannot be used the call is dis-
connected.
\N5 Reliable V.42 (LAPM) or MNP operation.
Uses either V.42 (LAPM) or MNP error
control. If neither can be used the call is
disconnected.
Auto-reliable V.42 (LAPM) or MNP opera-
tion. Tries to use V.42 (LAPM) error control
first, and MNP error control next. If neither
can be used, then Normal operation is
used.
\Q0 Flow control disabled
\Q1 Enables XON/XOFF flow control
\Q2 Enables CTS flow control from DCE
\Q3 Enables CTS flow control from DCE and
RTS from DTE
Unidirectional XOn/XOff
DSU IV ESP User Manual 61204011L1-1