HP Officejet Pro K850dn Printer - Manual (Page 101)

Accessories
Accessories and cables
HP automatic two-sided printing accessory (duplex unit) C8258A
HP IEEE-1284 A-B Parallel Cable (2 meter) C2950A
HP IEEE-1284 A-B Parallel Cable (3 meter) C2951A
HP USB A-B (2 meter) C6518A
Print servers
HP Jetdirect 170X external print server J3258B
HP Jetdirect 300X external print server J3263A
HP Jetdirect 500x print server for Fast Ethernet J3265A
HP Jetdirect 175X external print server (USB 1.0) J6035C
HP Jetdirect en3700 Fast Ethernet external print server
(USB 2.0) J7942A
HP Jetdirect ew2400 external Fast Ethernet wired and
wireless 802.11g print server for SMB J7951A
ENWW Accessories 93