Canon LBP7780CX User Manual page 340

6
Enter "put <the name of the file to be printed>", and then press [ENTER] on your keyboard.
Input Example: "put sample.txt"
The file is printed from the printer.
IMPORTANT
When printing a file
Print the file in the binary mode.
7
Enter "quit", and then press the [ENTER] key on your keyboard.
8
Enter "exit", and then press the [ENTER] key on your keyboard.
Command Prompt closes.