Sun Remote System Control (RSC) User's Guide

serial_data

This variable sets the number of RSC data bits; valid values are 7 and 8. The default setting is 8. Changes to this variable take effect on the next login connection over the RSC serial port.

If you change the serial data bits setting after configuring the serial port modem, you must reconfigure the modem; see "Modem Reconfiguration Required After Changing RSC Serial Port Settings".