Oki MICROLINE 591Elite User Manual page 126

Ready/Busy Protocol
The busy signal turns on when the space in the interface buffer becomes less than 256
bytes. The busy signal turns off (becomes Ready) after 200 ms or 1 second has passed
if the recovery has occured within 200 ms or 1 second. If the timing of recovery exceeds
200 ms or 1 second, the busy signal turns off (becomes Ready) immediately after the
recovery has occured.
XON/XOFF Protocol
This protocol uses the ASCII characters DC3 (decimal 19) and DC1 (decimal 17) as
follows. The DC3 will be sent to the transmission side immediately after the room in
the interface buffer has become less than 256 bytes to inform that receiving is
impossible.
The transmission of DC3 stops when the data receiving has stopped. If the timing of
recovery of 256 bytes is within 200 ms or 1 second after DC3 is sent, DC1 will be sent
200 ms or 1 second after recovery to inform that receiving is possible again.
200 ms or 1 second busy time for both protocols can be selected by menu.
C – 13