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PRINTING Jobs submitted to a printer are normally spooled before being sent to the printing device for printing. Printing devices can be connected physically [by attaching to a hardware port such as LPT1 or COM1], or logically [by attaching to a remote server like \\servername\printername]. A printer pool refers to multiple printing devices which are associated with a single printer. Each printer in the pool uses the same printer driver, so all the printing devices in the pool should be the same type. Under Windows NT, when a user accesses a remote printer [a printer on another computer], the printer driver for that printer is downloaded onto the local computer for use. A local printer is one which resides on the same computer. Printers are managed and created using Print Manager, accessible from Start->Settings->Control Panel->Printers
In this way, each user is not trying to directly print to the actual device at once. If, however, you intend to do this, you should enable the Job Based property setting for the printer. This ensures that the computer releases the printer connection once the print job has completed. Printer pools allow administrators to add extra printing devices without modifying user configurations. This is because the printing devices are added to existing printers.
The syntax of the LPR command is lpr -S <ip address of unix host> -P <printer name> filename In addition, the LPQ command is used to view the status of the UNIX printing device.
When a user connects to a printer on a Windows NT server, the client computer downloads the printer driver from the server. This means only one copy of the printer driver needs to be maintained, and clients get the latest driver when they connect to the printer. It also means printer drivers do not have to be installed on client computers, easing the task of letting users connect to printers without having to locate the required setup disks.
As is viewed in the diagram below, various settings can be applied to printers, such as available hours of use, priority, job defaults and other settings. These settings would be set by the Administrator or user granted membership of the Print Operators Group.
Separator pages are used to separate print jobs, and are the same as banner pages. Windows NT includes four separator pages, which are text files located in the \<winnt_root>\SYSTEM32 directory. Sysprint.sep For PCL printers Pcl.sep Switches the printing mode to PCL for HP series printers Pscript.sep Switches the printing mode to Postscript for HP series printers Default.sep For any printer, is a built in function [not a file], and prints the username (@N), the job number (@I) and the date (@D) Printers are objects just like files and directories and so have permissions associated with them. Setting printer permissions determines what a user is allowed to do. In addition, membership of the Print Operators group permits additional rights. The levels of control associated with printers are
If you had two printers in a printer pool, one an HP LaserJet Series II, the other a HP LaserJet 3, how would you configure the printer so that print jobs would work properly?
Salam Saif Said AL-Riyami Sultanate
of Oman
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Network Interface Printing Devices
