HP 680n - JetDirect Print Server Administrator's Manual page 211

USB Printer Settings
This section applies to HP Jetdirect external print servers with USB
printer connections only. USB information on the HP Jetdirect
configuration page is described in
some information may not be available.
Table 9.2 USB Settings
Message
Device Name
Manufacturer
Serial Number
Communication Mode
USB SPEED
ENWW
Table
Description
Name of the attached USB printing device, supplied by the
manufacturer.
Manufacturer of the attached printing device.
The Manufacturer's serial number for the attached printing
device.
Current USB communication mode:
G 1284.4: IEEE standard protocol, a mode for printers and
multi-function (All-in-One) devices that allows multiple
channels of simultaneous print, scan, and status
communication.
G MLC: HP-proprietary protocol for Multiple Logical
Channels, a mode for printers and multi-function
(All-in-One) devices that allows multiple channels of
simultaneous print, scan, and status communication.
G Bidirectional: Two-way printer communication, sending
print data to the printing device and returning status
information from the printing device.
G Unidirectional: One-way communication to the printing
device.
G Device not found: The connection of a printing device
has not been detected. Check device and cable.
G Device not supported: The device connected is not a
printer (for example, a camera).
(USB 2.0 print servers only) Specifies the autonegotiated
communication speed over the USB connection between
the print server and the device.
Full Speed: 12 Mbits/sec as specified in the USB v2.0
specifications, compatible with USB v1.1 specifications.
Hi-Speed: 480 Mbits/sec for USB v2.0 devices only.
Disconnected: The USB port is not connected.
HP Jetdirect Configuration Page 211
9.2. For non-HP devices,