Oki B4400 Series - Manual (Page 15)

B4400/B4600 User’s Guide – Printer components > 15
17. Power cable connection
18. Cooling fan
19. USB interface connection
20. Parallel interface connection
21. Second paper tray (optional) connection
22. Network card (standard on B4400n, B4600n, B4600nPS
and optional on B4400, B4600, and B4600PS)
23. RS232 serial interface card (optional on B4400, B4600
and B4600PS)
24. Optional Multi Purpose Tray connection
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