HP 24SII - Manual (Page 58)

The Model 24SII DES will translate for serial devices using different
configurations. This allows you to mix-and-match devices having
different configurations. You may set the baud rate, word size, stop
bits, parity and XON/XOFF (transmit and receive) for each individual
serial port. For high speed serial modules, you may also program the
printer sharing mode to either bidirectional or unidirectional. You may
program the 4-Wire/8-Wire Operation on the M24SII-V07 high speed
serial module to be 4-wire (RJ-11) or 8-wire (RJ-45).
Factory-default configuration on all serial ports is 9600 baud rate,
8 bit word size, 1 stop bit, no parity, and XON/XOFF disabled.
The default printer sharing mode for high speed serial modules
is bidirectional. The default 4-Wire/8-Wire Operation for the
M24SII-V07 module is 8-wire.
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The Input Inactivity Timeout allows the Model 24SII DES to
disconnect a computer port which has sent a print job when no
characters are received from the computer for the specified timeout
period. The input inactivity timeout is effective only for
computer-to-peripheral communication. For computer-to-computer
communication, the timeout does not apply, and disconnect occurs
only manually.
If the buffer of the Model 24SII DES is filled to capacity, the unit will
drop the DTR line or send an XOFF to the computer, causing the
computer to stop sending characters until the buffer can accept more
data. In this case, the time that the computer is not sending
characters is not counted as part of the Input Inactivity Timeout.
Factory default is 20 seconds.