The Okidata c3400 printer has a web administration page that can be used to configure printer settings after the initial setup with the Okidata Network Utility.
Once you have configured the IP address on the printer you can visit that IP address in a web browser to view more information about the printer.
To change settings you will be required to login. The username is “root” and the password is the last 6 hex characters of the MAC address without the colons so it would be something similar to “04B1C4”. The letters are case sensitive so make sure they are capitalized.