Nortel Networks CTA 500dm User Manual
AT commands 57
P0873832 Issue 05
CTA 500
dm On Line Guide
Serial Interface Control Lines commands summary
Flow Control
The Flow Control Command
\Qvalue
sets the method of ßow control on the interface between the
CTA 500dm and the attached computer. The following table shows
the allowable values.
CTA 500dm and the attached computer. The following table shows
the allowable values.
Command
Description
Value
\Qn
serial interface
flow control
0 none
1 bidirectional XON/XOFF
2 not supported
3 bidirectional RTS/CTS
1 bidirectional XON/XOFF
2 not supported
3 bidirectional RTS/CTS
(default)
4 not supported
4 not supported
&Cn
DCD operation
0 always on
1 tracks connection (default)
2 always on, except temporarily
1 tracks connection (default)
2 always on, except temporarily
after disconnect
&Dn
DTR operation
0 ignored (default)
1 enter command state
2 hang-up and disable auto
1 enter command state
2 hang-up and disable auto
while DTR is down
3 hang-up and reset port
3 hang-up and reset port
&Rn
CTS operation
0 CTS follows RTS
1 CTS is always on when on-line
1 CTS is always on when on-line
(default)
&Sn
DSR operation
0 DSR is always on (default)
Value
Use
0
disable flow control
1
enable bidirectional XON/XOFF software flow control
2
not supported
3
enable bidirectional RTS/CTS hardware flow control (default)