HP 1200 manual USB port information, Device Name, Manufacturer, Serial Number, Mode

	USB port information
Message	Description
Device Name	The name of the attached USB printing device. The
	manufacturer supplies this name.
Manufacturer	The manufacturer of the attached printing device.
Serial Number	The serial number of the attached printing device.
Mode	The USB communication mode:
	Bidirectional: Two-way printer communication – Sends print
	data to the printer and returns status information from the
	printer.
	MLC: HP-proprietary protocol for Multiple Logical Channels –
	A mode for printers and multi-function devices (such as the
	HP LaserJet 1200) that allows multiple channels of
	simultaneous print, scan, and status communication.
	1284.4: IEEE-standard protocol – A mode for printers and
	multi-function devices, such as the HP LaserJet 1200, that
	allows multiple channels of simultaneous print, scan, and
	status communication.
	Unidirectional: One-way print communication from computer
	to printer.
	Disconnected: A printer connection has not been detected.
	Check the printer and cable.

EN Understanding the print server configuration page 171