Digi PortServer/8 User Manual page 23

Flow Control
Printer Setup Example
Step 1. Turn off the power to the printer and the PortServer, and connect the printer, wired
as discussed on page 9, then power up again.
Step 2. At the control terminal, log in as root .
Step 3. The default settings when defining a port for printing are 9600 baud, 8 data, 1 stop,
and no parity. For this example, those will be fine, but we will need to set the flow
control.
Setting the port definition to printer and setting the flow control to DTR/CTS
("hardware") will require these Set commands: set port and set flow . The set
command's range parameter will also come into play, to tell the PortServer soft-
ware that the changes we are making are to Port 3.
While the default port flow control setting is for software flow
control, let's set it again just to make sure, by typing:
#>set flow ixon=on range=2
#>set flow ixoff=off range=2
(In the above, set flow ixon=on sets port #2 to use
software flow control (typically XON/XOFF) for output data .
set flow ixoff=off sets port #2 to turn off software flow
control for input data (keyboards shouldn't need flow control).
Shorthand: The above two set flow commands could have
been set with one line:
#> set flow ixon=on ixoff=off range=2
Almost all commands can also be abbreviated; see
Abbreviations on page 28. For clarity, abbreviations will not be
used in these examples, and each command will have its own
line.
set commands are discussed in detail on page 38.
(Printer with hardware flow control on port 3)
PortServer Terminal Server Ÿ Page 15