Lexmark W810 用户指南

Connectivity and network management

Unlike Nibble and Byte mode, once ECP mode is established between the host and the 
printer, it is not broken until the host or the printer fails in some way. This allows for a 
greater transfer speed, since the parallel port never returns to unidirectional compatibility 
mode, which would create the need for negotiating a new bidirectional transmission.

The following table briefly describes the print settings affecting parallel communication. 
For information on changing settings and details on other printer settings, see “Changing 
printer settings” on page 27.

Be sure you use an IEEE 1284 compliant cable. After checking all of the settings, if your 
printer won’t operate in bidirectional mode, check the parallel cable. Some lower-cost par-
allel cables may not have all of the parallel signals physically connected in the cable.

Protocol

This menu item determines how the printer functions when in 
compatibility mode. Setting the printer to either Standard or 
Fastbytes mode does not affect the bidirectional settings.

Advanced Status

Set this menu item to On when you are using bidirectional 
communication; it enables the IEEE 1284 capabilities on the 
printer. When you set Advanced Status to Off, no bidirectional 
communication occurs.

NPA Mode

When you set NPA Mode Off, the printer does not process 
incoming NPA packets. Auto means that the printer receives 
and processes NPA packets; in other words, NPA communi-
cations protocol is enabled. In addition, the printer processes all 
PostScript and PCL emulation jobs. 

When you set NPA Mode On, the printer receives and 
processes NPA packets only. It does not process any other 
form of data, such as PCL or PostScript emulation. We do not 
recommend setting NPA Mode On.