Digi Connectware RealPort, Setup Manual

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3-10 Setting TTY Options
The following options are sticky—the effects continue until the system is rebooted or until the
options are changed.
[-]fastbaud Alter the baud rate tables to permit the use of data rates that are beyond the
range supported by the operating system. See fastbaud Data Rate Mapping, on
page 3-11.
[-]rtspace Enable [disable] RTS hardware input flow control, so RTS drops to pause
remote transmission.
[-]ctspace Enable [disable] CTS hardware output flow control, so local transmission
pauses when CTS drops.
[-]dsrpace Enable [disable] DSR hardware output flow control, so local transmission
pauses when DSR drops.
[-]dcdpace Enable [disable] DCD hardware output flow control, so local transmission
pauses when DCD drops.
[-]dtrpace Enable [disable] DTR hardware input flow control, so DTR drops to pause
remote transmission.
[-]forcedcd Disable [re-enable] carrier sense, so the TTY may be opened and used even
when carrier is not present.
startc c Sets the XON flow control character. The character may be given as a decimal,
octal or hexadecimal number. Octal numbers are recognized by the presence of
a leading zero, and hexadecimal numbers are denoted by a leading "0x". For
example, the standard XON character, <CTRL-Q>, can be entered as "17"
(decimal), "021" (octal) or "0x11" (hexadecimal).
stopc
c
Sets the XOFF flow control character. The character may be given as a decimal,
octal, or hexadecimal number (see startc, above, for format of octal and
hexadecimal numbers).
astartc
c
Sets auxiliary XON flow control character. The character may be given as a
decimal, octal, or hexadecimal number (see startc, above, for format of octal
and hexadecimal numbers).
astopc
c
Sets auxiliary XOFF flow control character. The character may be given as a
decimal, octal, or hexadecimal number (see startc, above, for format of octal
and hexadecimal numbers).
[-]aixon Enables auxiliary flow control, so that two unique characters are used for XON
and XOFF. If both XOFF characters are received, transmission will not resume
until both XON characters are received.
maxcps
n
Sets the maximum Characters Per Second (CPS) rate at which characters are
output to the transparent print device. The rate chosen should be just below the
average print speed. If the number is too low, printer speed will be reduced. If
the number is too high, the printer will resort to flow control, and user entry on
the terminal will be correspondingly impaired. Default is 100 CPS.
maxchar n Sets the maximum number of transparent print characters the driver will place
in the output queue. Reducing this number increases system overhead;
increasing this number delays operator keystroke echo times when the
transparent printer is in use. Default is 50 characters.
bufsize n Sets the driver’s estimate of the size of the transparent printer’s input buffer.
After a period of inactivity, the driver bursts this many characters to the
transparent printer before reducing to the maxcps rate selected above. Default is
100 characters.