Dell 2155cn/cdn Color Laser Printer - Manual (Page 175)

Dell Printer Configuration Web Tool 173
The default user name is admin, and the default password is left blank (NULL).
You can change only the password in the Set Password page in the Security
menu. The user name cannot be changed. See "Set Password" for more
information.
Details of the Menu Items
"Printer Status" "Printer Status" "Printer Status"
"Printer Events"
"Printer Information"
"Printer Jobs" "Printer Jobs" "Job List"
"Completed Jobs"