Output Solutions 650 - Manual (Page 143)

Appendix B IBM ProPrinter X24 and IBM ProPrinter II Commands
ESC Q ETX
Deactivate Printer-System Connection Hexadecimal code: 1B 51 03
Sets the printer off-line (in LOCAL mode), until the DC1, which restores the connection, is
received.
The third element in the sequence ETX identifies the model of printer connected
(80-column printer).
B-33