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An IEEE 1284 36-pin male micro ribbon printer cable connection. The computer side normally uses a DB-25 port instead of this connector. IEEE 1284, also known as the Centronics port, is a standard that defines bi-directional parallel communications between computers and other devices.
The original IBM parallel printer adapter for the IBM PC of 1981 was designed to support limited bidirectionality, with 8 lines of data output and 4 lines of data input. [ citation needed ] This allowed the port to be used for other purposes, not just output to a printer.
Duplex printing is a feature of some computer printers and multi-function printers (MFPs) that allows the printing of a sheet of paper on both sides automatically. Print devices without this capability can only print on a single side of paper, sometimes called single-sided printing or simplex printing.
This is the bi-directional protocol used between the host server and the printer. It is used to send the page-level data to the printer and to signal errors and accounting information back to the server. The IPDS protocol also allows the server to query a printer's available resources (e.g. available memory, fonts, input trays, etc.).
Printer Command Language, more commonly referred to as PCL, is a page description language (PDL) developed by Hewlett-Packard as a printer protocol and has become a de facto industry standard. Originally developed for early inkjet printers in 1984, PCL has been released in varying levels for thermal , matrix , and page printers.
A duplex communication system is a point-to-point system composed of two or more connected parties or devices that can communicate with one another in both directions. Duplex systems are employed in many communications networks, either to allow for simultaneous communication in both directions between two connected parties or to provide a reverse path for the monitoring and remote adjustment ...
HP Universal Print Driver (UPD) is an intelligent print driver that supports a broad range of HP print devices, such as LaserJet and various MFPs.Developed by Hewlett-Packard, HP UPD combines a general purpose driver (XPSDrv, UniDrv, or PSCRIPT), print control, and HP proprietary extensions.
AppSocket is a very similar implementation by Tektronix for Phaser printers, later sold to Xerox. [4] This protocol adds support for querying for printer status by non-printing users via a separate UDP port. [5] Most JetDirect devices also came with, JetDirect Interface, a telnet interface for configuring the device or printer. [6]