To test printing through a Telnet session, append the TCP port number to the Telnet command. For internal HP Jetdirect and single parallel port external HP Jetdirect devices, the port number is 9100. For the multiple parallel port external HP Jetdirect devices, the port numbers are 9100, 9101, and 9102 for parallel ports 1, 2, and 3, respectively.
Once in Telnet, type some text or characters, and then close the Telnet connection:
To close the Telnet session in Windows 2000, XP, and most variations of UNIX, press and hold down the Ctrl key, then press the right square bracket key ( ] ).
In Windows 9x and NT, click Connect, then Disconnect in the Telnet window.
Then, quit Telnet. Type quit at the Telnet prompt or exit the Telnet window.
(You may have to press the Go or Select button on the printer control panel to eject the page. The page should print whatever was typed in Telnet.)
For example, assume that the HP Jetdirect print server has an IP address of 192.168.192.191 and you use Telnet from Windows XP:
For an internal HP Jetdirect or a single parallel port external HP Jetdirect, open a command prompt and type the following: telnet 192.168.192.191 9100 (For a three-port, external HP Jetdirect, use port numbers 9100, 9101, or 9102 for parallel ports 1, 2, or 3, respectively.)
While in Telnet, type the following: This is a test and then press Enter.
Type Ctrl + ] (press and hold the Ctrl key and type a right bracket), then press Enter.
At the Telnet prompt, type the following: quit
The printer should print, "This is a test."