UltraPort Serial Adaptors User Guide
Installing under Linux Page 91
Chapter 2 Installing drivers and host cards
UltraPort 8i and UltraPort81 Express RTS/DTR option
The Perle UltraPort8i and Ultraport81 Express can only support either RTS or DTR. There is
a utility included with this driver to configure which signal will be active. The configuration is
stored in the modules.conf file.
The utility is used
as follows: set_io8_rts off
This is the default action. The driver will use the pin as "DTR" when the tty is in soft-
ware handshake mode.
set_io8_rts on
If this option is used or hardware handshake is on, the pin will always be RTS.
Setultrap Interface Protocol Configuration Utility (UltraPort SI only)
Perle provides a command line utility that allows the user to configure each UltraPort SI
serial ports for features EIA-232, EIA-422, EIA-485 full duplex and EIA-485 half duplex.
Note
The perle serial module will have to be unloaded and reloaded for the
RTS/CTS option to take effect.
Note
The default interface protocol for the Perle UltraPort SI cards is EIA-232.