HP Jetdirect 250M User Manual page 3

Switch on the printer's power.
Plug in the print server. Push it into the printer's LIO slot until it clicks into place.
Plug in the network cable. Plug one end of the cable into your network device (a hub,
switch, or router — if your network cabling is hidden in the walls, your connection may be a
wall outlet). Plug the other end into the print server.
Check the lights. After a few seconds, the status light should be ON (solid green) and one of
the two link lights should be ON (solid green). If the lights on the print server are different
from this pattern, see the troubleshooting notes on the other side of this poster.