Parallel cable
HP IEEE-1284 A-B Parallel Cable (2 m) C2950A
HP IEEE-1284 A-B Parallel Cable (3 m) C2951A

USB cable
HP USB A-B (2 m) C6518A

Network interface
HP Jetdirect 170X external print server J3258A
HP Jetdirect 300X external print server J3263A
HP Jetdirect 175X external print server (USB) J6035A
HP Jetdirect 310X external print server (USB) J6038A