Editing JetDirect (section)

==Internal print servers==

===MIO===

MIO (Modular Input/Output) was the first technology developed by HP for its laser printers to enable the addition of peripheral cards such as JetDirect.

{| class="wikitable"
! Model number !! Network ports !! Released !! Notes
|-
|C2059A
| [[Ethernet]] [[Attachment Unit Interface]] (AUI), [[10BASE2]]
| October 1, 1991
| [[IPX/SPX]] only, discontinued
|-
|C2059B
| Ethernet AUI, 10BASE2
| October 1, 1991
| DLC/LLC only, discontinued
|-
|C2059C
| [[Token Ring]] [[DE-9 connector]]
| October 1, 1991
| IPX/SPX only, discontinued
|-
|C2059D
| Token Ring DE-9 connector
| October 1, 1991
| DLC/LLC only, discontinued
|-
|C2059E
| Ethernet AUI, 10BASE2
| October 1, 1991
| [[EtherTalk]] only, discontinued
|-
|C2059T
| Ethernet AUI, 10BASE2
| October 1, 1991
| [[TCP/IP]] only, discontinued
|-
|J2337A
| [[10BASE-T]], 10BASE2
| November 1, 1992
| IPX/SPX only, Can be upgraded with J2546B SIMM, discontinued
|-
|J2338A
| 10BASE-T, 10BASE2
| November 1, 1992
| DLC/LLC only, Can be upgraded with J2546B SIMM, discontinued
|-
|J2339A
| 10BASE-T, 10BASE2
| November 1, 1992
| EtherTalk only, Can be upgraded with J2546B SIMM, discontinued
|-
|J2340A
| 10BASE-T, 10BASE2
| November 1, 1992
|| TCP/IP only, Can be upgraded with J2546B SIMM, discontinued
|-
|J2371A
| 10BASE-T
| April 1, 1993
|| Can be upgraded with J2546B SIMM, discontinued
|-
|J2372A
| 10BASE-T, 10BASE2, [[LocalTalk]]
| April 1, 1993
| Can be upgraded with J2546B SIMM, discontinued
|-
|J2373A
| Token Ring DE-9 connector
| April 1, 1993
|| Can be upgraded with J2549B SIMM, discontinued
|-
|J2550A/B
| 10BASE-T
| May 1994, November 1, 1996
| "A" version can be upgraded to "B" version with a firmware update, discontinued [[File:HP jetdirect j2550.jpg|right|100px]]
|-
|J2552A/B
|| 10BASE-T, 10BASE2, and LocalTalk
|| May 1994, November 1, 1996
|| "A" version can be upgraded to "B" version with a firmware update, discontinued
|-
|J2555A/B
| [[Token Ring]] DE-9 connector, 8-pin modular
| November 1, 1996
| "A" version can be upgraded to "B" version with a firmware update, discontinued [[File:Jetdirect-J2555B.jpg|right|100px]]
|-
|J2556B
| 10/100BASE-TX
| June 1, 1997
| Flash upgradeable, discontinued
|-
|J4100A
| 10/100BASE-TX, 10BASE2
| February 1, 2000
| Also known as the HP JetDirect 400n Print Server for Fast Ethernet, flash upgradeable, discontinued but not considered a legacy part in regards to firmware development
|-
|J4105A
| Token Ring
| February 1, 2000
| Also known as the HP JetDirect 400n Print Server for Token Ring, flash upgradeable, discontinued but not considered a legacy part in regards to firmware development
|-
|J4106A
||10BASE-T
| February 1, 2000
| Also known as the HP JetDirect 400n Print Server for Ethernet, flash upgradeable, discontinued but not considered a legacy part in regards to firmware development
|-
|}

===LIO===

LIO (Low-end I/O) interfaces were developed by HP as a corporate response to the strictly internal MIO and EIO development path. The LIO interface differs from MIO/EIO in that the card is wrapped in an external plastic casing and is [[hot-swappable]]. The LIO backplane technology is based on a low power/low-voltage (< 1-volt) differential signaling technology.

* 200N (C6502a) - Parallel with Centronics Interface
* 200m (J6039C) – 10/100 BASE-T (Supports only Windows and Apple Mac, fixed firmware)
* 250m (J6042B) – 10/100 BASE-T (Full support for Netware and Unix, firmware upgradeable)
* 280m (J6044A) – 802.11b Wireless

===EIO===
[[File:HP jetdirect 610n.jpg|thumb|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.

* 1284B Parallel Card (J7972G) - Provides one Type C Mini-Centronics 36-pin parallel port.<ref>{{Cite web| url=http://store.hp.com/us/en/pdp/accessories-88342--1/hp-1284b-parallel-card-j7972g | title=HP 1284B Parallel Card | accessdate= February 27, 2016}}</ref>
* 600n – 10/100BASE-TX/10BASE2/LocalTalk (J3110A, J3111A, J3112A, J3113A) ''(Discontinued)''
* 610n – Ethernet/Fast Ethernet/[[802.5]], DE9, 8-pin Modular (J4169A, J4167A) ''(Discontinued)''
* [[JetDirect#615n series ASIC issue|615n]] – Ethernet/Fast Ethernet (10/100BASE-TX, 802.3) (J6057A) ''(Discontinued)''
* 620n – Ethernet/Fast Ethernet (10/100BASE-TX, 802.3) (J7934A, J7934G)
* 625n – Ethernet/Fast Ethernet/Gigabit (10/100/1000BASE-TX, 802.3) (J7960A, J7960G) ''(Discontinued)''
* 630n – Ethernet/Fast Etnernet/Gigabit (10/100/1000BASE-Tx, 802.3) [[IPv6]] (J7997G) ''replacement for 625n'' ''(Discontinued)''
* 635n – Ethernet/Fast Ethernet/Gigabit (10/100/1000BASE-TX, 802.3) [[IPv6]]/[[IPsec]] (J7961A, J7961G) ''(Discontinued)''
* 640n - Ethernet/Fast Ethernet/Gigabit (10/100/1000BASE-TX, 802.3) [[IPv6]]/[[IPsec]] (J8025A) <ref>{{Cite web | url=http://store.hp.com/us/en/pdp/accessories-88342--1/hp-jetdirect-640n-print-server-j8025a-aba | accessdate=February 27, 2016| title=HP Jetdirect 640n Print Server}}</ref>
* 680n – 802.11b Wireless ''(Discontinued)''
* 690n – Ethernet/Fast Ethernet/Wireless  (10/100BASE-TX, 802.3, 802.11b/g) [[IPv6]]/[[IPsec]] (J8007G) ''(Discontinued)''<ref>{{cite web|url=http://h10010.www1.hp.com/wwpc/us/en/sm/WF05a/18972-18972-236253-34210-396578-3662193.html |title=HP Jetdirect 690n IPv6/IPSec 802.11g Wireless Print Server - overview and features |access-date=September 18, 2008 |url-status=dead |archive-url=https://web.archive.org/web/20081228045553/http://h10010.www1.hp.com/wwpc/us/en/sm/WF05a/18972-18972-236253-34210-396578-3662193.html |archive-date=December 28, 2008 }}</ref>
* 695nw - Ethernet/Fast Ethernet/Gigabit/Wireless  (10/100/1000BASE-TX, 802.3, 802.11b/g/n) [[IPv6]]/[[IPsec]] (J8024A) <ref>{{Cite web | url=http://store.hp.com/us/en/pdp/accessories-88342--1/hp-jetdirect-695nw-print-server-j8024a-aba | title=HP Jetdirect 695nw Print Server | accessdate=February 27, 2016}}</ref>

===615n series ASIC issue===
In 2002 HP released the 615n series of Internal EIO print server. This model featured a new chipset manufactured in Singapore that had a problem related to either overheating or data overload. Otherwise known as the ASIC issue, this meant the 615n card could fail without warning, and when it failed, would completely shut down, appearing to vanish from the printer entirely.

Soon afterwards, HP began to do a per-item replacement policy that has ended as of October 31, 2008, when all known 615n cards were at least 4 years old and at such time HP felt it had taken appropriate corporate responsibility for a defect in manufacturing.

The 615n cards most often affected were the units installed in the Laserjet 2300, 4200 and Color 4600 series. Those cards appear to be most prone to failure.

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.<ref>{{cite web|url=http://www.hp.com/pond/jetdirect/j6057a.html |title=HP J6057A 615n EIO 10/100 Information |access-date=February 2, 2016 |url-status=dead |archive-url=https://web.archive.org/web/20110609014450/http://www.hp.com/pond/jetdirect/j6057a.html |archive-date=June 9, 2011 }}</ref> If it is proven to be the chipset, HP would be able to replace the card under warranty with an as-new card (nominally a 620n).