JetDirect

Last updated
JetDirect
JetDirect logo.svg
HP jetdirect 600n.jpg
JetDirect 600n card
      Manufacturer Hewlett-Packard
      IntroducedMarch 1991;34 years ago (1991-03)
      Type Print server
      Connection

      JetDirect is a line of external print servers formerly sold by Hewlett-Packard (HP). The JetDirect allows computer printers to be directly attached to a local area network. [1]

      Contents

      History

      Hewlett-Packard JetDirect 170X-0491.jpg
      Hewlett-Packard JetDirect 170X-0492.jpg
      External print server JetDirect 170X with LAN and parallel printer ports

      Protocols

      More advanced versions of JetDirect supported a number of network printing protocols. However, the protocol that ended up being associated with it, the JetDirect protocol, [2] is its raw TCP/IP protocol sometimes referred to as Socket API or RAW. It is an extremely simple network printing protocol. [3] Submitting a print job can be done by netcating a file containing the page description language (e.g. PostScript, PCL) to the appropriate TCP port on the printer (default port is 9100). Information about the printer and job is simply sent to the client while the TCP connection is active. The port would reject connections if the printer is busy. [3]

      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]

      External print servers

      Internal print servers

      EIO

      JetDirect 610n card HP jetdirect 610n.jpg
      JetDirect 610n card

      EIO (Enhanced Input/Output) is a modular interface developed by HP for its printers to expand their capabilities. EIO does not just serve JetDirect cards, but EIO hard drives and the EIO Connectivity card for adding communication ports to the printers as well. EIO utilizes the 3.3V signaling technology of the Conventional PCI bus and is significantly more energy-efficient than MIO technology. EIO print servers will not work in LIO slots, nor will the LIO print servers work in EIO slots.

      615n series ASIC issue

      Any 615n series card can fail, but it is up to HP to determine if the failure is due to the chipset or some other factor. HP recommended to call them or contact them through the Web site and they will proceed to do some simple troubleshooting steps to determine if the failure is due to the chipset or some other cause. [11]

      Other JetDirect products

      References

      1. ↑ Craig Hunt (2002), TCP/IP network administration, p. 255, ISBN   978-0-596-00297-8
      2. ↑ "Using Network Printers". cups.org. Retrieved 2017-09-06.
      3. 1 2 Powell, Patrick A (26 Nov 2010). "Socket API". LPRng Reference Manual. 3.8.35. Retrieved 7 December 2019. The Socket API is a very flexible job transfer protocol. It is widely support by most Print Server manufacturers, with the Hewlett Packard JetDirect setting the de facto standard. The Socket API is extremely simple.
      4. ↑ "Printing to a Xerox Multifunction Device Using Port 9100" (PDF). Xerox Multifunction Devices - Customer Tips. September 26, 2003. Retrieved 7 December 2019.
      5. ↑ Powell, Patrick A (26 Nov 2010). "AppSocket TCP/IP Protocol". LPRng Reference Manual. Archived from the original on 2015-10-24. Retrieved 2017-09-06.
      6. ↑ Powell, Patrick A (26 Nov 2010). "HP JetDirect Interface". LPRng Reference Manual. 3.8.35. Retrieved 7 December 2019.
      7. ↑ "HP 1284B Parallel Card" . Retrieved February 27, 2016.
      8. ↑ "HP Jetdirect 640n Print Server" . Retrieved February 27, 2016.
      9. ↑ "HP Jetdirect 690n IPv6/IPSec 802.11g Wireless Print Server - overview and features". Archived from the original on December 28, 2008. Retrieved September 18, 2008.
      10. ↑ "HP Jetdirect 695nw Print Server" . Retrieved February 27, 2016.
      11. ↑ "HP J6057A 615n EIO 10/100 Information". Archived from the original on June 9, 2011. Retrieved February 2, 2016.
      This page is based on this Wikipedia article
      Text is available under the CC BY-SA 4.0 license; additional terms may apply.
      Images, videos and audio are available under their respective licenses.