HP 175X - JetDirect Print Server User Manual page 52

Steps to install the print server hardware
1. Attach the print server to a 10Base-T (Ethernet) or 100Base-TX (Fast Ethernet) local area
network by plugging a network cable into the RJ-45 connector on the rear end of the print server.
2. Attach the print server to the printer by plugging the Universal Serial Bus (USB) cable—shipped
with the print server—into the USB connector on the front end of the print server and into the
USB connector on the printer.
Caution! Unsupported USB Devices:
HP 4135A Jetdirect Connectivity Card
any USB hub
any USB-to-parallel converter
any USB cable extender