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![]() | The contents of the RJ11, RJ14, RJ25 page were merged into Registered jack on 2010-02-23. For the contribution history and old versions of the redirected page, please see its history; for the discussion at that location, see its talk page. |
![]() | The contents of the RJ21 page were merged into Registered jack on 2010-10-16. For the contribution history and old versions of the redirected page, please see its history; for the discussion at that location, see its talk page. |
![]() | The contents of the RJ48 page were merged into Registered jack on 2010-10-16. For the contribution history and old versions of the redirected page, please see its history; for the discussion at that location, see its talk page. |
![]() | The contents of the RJ61 page were merged into Registered jack on 2010-10-16. For the contribution history and old versions of the redirected page, please see its history; for the discussion at that location, see its talk page. |
Try http://www.bnoack.com/data/cables/RJ_types.html for a table that shows the difference between RJs 10, 11, 12, 14, 45, 48.
wgustafson@leviton.com
I think there should be a section explaining how jacks are inserting into various types of telecommunication equipment like Keystone wall plates and surface mount boxes. In a professional job, you would not terminate a cable to a jack without securing it to something. Chewbaggins ( talk) 26 May 2009 —Preceding undated comment added 21:16, 26 May 2009 (UTC).
Jacks do not need to be "secured". Common examples include telephone extension cables with 4P connectors, a plug at one end and a jack at the other, where the connectors and cable itself are not secured to anything. Also jacks are found in so-called couplers (a telephone cable gender bender), for joining two telephone cables by their plugs. The coupler is not usually attached to anything and so 2 jacks are in fact not "secured". It is an important distinction that an extension cable uses a connector of each sex to extend a cable. Regular telephone cables for instance are terminated with two male plugs at each end to connect a telephone to the phone system.
It should perhaps be emphasized that telephone line cables are usually cross-wired and that Ethernet network line cables use straight-through wiring. This is significant if using 8P8C couplers to extend a network cable (which is not really recommended) since they exist in two "flavours", cross-wired for telephone use and straight-through for Ethernet use. Cross-wired as used above is not ambiguous in that each individual wire is considered. So called cross-wired Ethernet cables are not fully cross-wired cables but rather cross-paired and then only pairs 2 and 3 are switched while pairs 1 and 4 (if present),and their wires, are still straight-through, which is why the adjective "Ethernet" is included to emphasize the specificity of such a cable's wiring pattern.
99.254.69.141 ( talk) 17:25, 19 November 2010 (UTC)
The naming confusion section refers to RJ11 as "six-position" and then in the next sentence "The four-position RJ-11". The picture labels the four pin plug as "RJ11".
It also suggests that RJ11 is a two wire standard. The source above disagrees with this. I don't like to do it, because I don't know enough about the subject - but I'd suggest removing this "naming confusion" section until it actually addresses the naming confusion clearly.
DB: RJ11 uses a 6 position mini- modular jack, but only pins 3 and 4 are used. Other 6 position RJs use 4 pins. Knowing it's foolish to have to stock 6P2C and 6P4C jacks, CFR 47 Part 68.500 states "Note: This jack is depicted equipped with 4 contacts; it may be fabricated with it's full 6 contact capacity." Similar notations were made for "some" other jacks.
http://www.sundance-communications.com/forum/Forum24/HTML/000065.html has discussion on this subject by some people who are keen on getting it right. The feeling I get is that RJ-xx is not the correct name for the plug or socket, but is in fact the wiring standard. From that discussion:
-- AndyP 17:03, 2 December 2005 (UTC)
Bryan Henderson 21:47, 18 August 2006 (UTC)
-- adaptr ( talk) 12:46, 19 December 2007 (UTC)
DB: FCC CFR47 Part 68.502. CFR is Code of Federal Regulations
I checked the GPO Access site, and there is no 47CFR68.502; at least, not in the latest revisions. Why is this citation still here? Nulbyte 01:55, 5 May 2006 (UTC)
DB: Now that IS a problem. You absolutely cannot use a RJ12 for a 6P6C. RJ12 is not hardware, it is a wiring plan, and the 6P6C miniature modular jack, obviously, IS hardware. You must use the 6 "position" mini-modular jack for RJ14C/W. It's plan uses only pins 2 through 5, so you can use either a 6P4C or a 6P6C... that part is a "who cares?"
Is this another example of the kind of misuse we have seen with RJ45? Lego ( with reference to the mindstorms nxt) and microchip ( with reference to the icd2) both seem to use it. What other uses does a 6P6C connector have and do its users also reffer to it as a RJ12? (i'm not discussing right or wrong here, just actual use) Plugwash 00:25, 11 September 2006 (UTC)
DB: Other uses of 6P6C: RJ18C/W, RJ25C, RJ1DC,
DB: You should think in terms of right and wrong. It will make more sense if you do.
Simplify! Just use RJ45 jacks wired T568A and you can use it for phone - 1,2, 3 and 4 lines; the majority of phone systems; LAN; various media distribution (HDTV) systems; and more - that's basically become the d-facto standard (kinda). For example, just plug an RJ11,12, etc into a RJ45 jack, plug the other end of the wire into a phone distribution module in the distributed wiring enclosure and BAM it's a phone jack. Or plug your RJ45 from your computer into the jack with the other end of the wire into a network router in the distributed wiring enclosure and BAM it's a network port. - So again, just use RJ45 jacks wired T568A. (in MOST situations-there are always exceptions to everything...) —Preceding unsigned comment added by Sbg1959 ( talk • contribs) 13:37, 10 November 2007 (UTC)
DB: That simplifies nothing. RJ45 is NOT a jack, it's a wiring plan. Standard wiring configurations T568A and B use the 8 position min-modular jack and provide Standard coding (color code, etc) for four cable pairs. T568A and B are specific to wiring "within" a customer premises. Trying to use RJ45 as you discuss, is irrelevant.
http://en.wikipedia.org/wiki/Twisted_pair discusses shielding and
screening in a cable and mentions that it is ineffective unless a
shield or screen is grounded. This is probably achieved through the
jack, but how? All the jacks in this article are plastic with no
mention of a ground.
Regards, ...
PeterEasthope (
talk)
05:04, 2 February 2008 (UTC)
Thanks Plugwash. Does anyone have a picture of one
of these? Anyone care to mention under "Uncommon types"?
Perhaps grounding warrants a new heading.
Regards, ...
PeterEasthope (
talk)
15:36, 13 February 2008 (UTC)
There is no "Middle two", methinks. What's a better way to say this?
216.79.193.84 ( talk) 15:35, 13 November 2008 (UTC)
The article is headed "Registered jack" (which makes sense according to it's definition) but contains frequent references to "Registration jack", which makes no sense to me. Is this just sloppiness/typos or is there some rationale to it? —Preceding unsigned comment added by 62.49.27.35 ( talk) 13:48, 7 April 2009 (UTC)
DB: 8/10/09 I hope this will help: Jacks are NOT registered, telephones ARE registered. The FCC Registration Program outlines the technical requirements, at The Network Interface, for telephones to be connected to the "Network," and it details the NI type and their wiring for use by both the Telco (jack), on their side of the NI, and the Customer (plug) on their side of the NI (aka the Customer Premises). The NI connector identifications are actually Universal Service Order Codes (USOC) which are used by the Telcos, and the codes were adopted by the FCC and the ANSI Standards bodies. They are correctly called Registration Jacks because they are "of " the registration program, but are not registered.
DB: Also, the codes such as RJ11 define a wiring plan at the NI, not a jack type (6 pin mini-modular). A particular jack type may serve many different wiring plans, i.e., the 6 position mini-modular jack is used for the following.... RJ11C/W, RJ14C/W, RJ18C/W, etc.
DB: And finally, jacks used within the customer premises, but NOT at the NI, are NOT Registration Jacks, and are correctly called by either their type (for example 8 position mini-modular) or by a non-NI code, for example, "T568A" or "T568B," etc, which use the 8P8C jack.
DB: You can't put 8 connections on a 6-pin jack. No such thing exists.
Our university dorms used 6p8c jack and plugs to deliver networking in each customers room until very recently. I didn't see any mention of jacks that have a higher 'c' than 'p' numbers. Should they be in the uncommon section? Larek ( talk) 13:01, 30 April 2009 (UTC)
"True RJ45" redirects to this article, but this article does nothing to define "true RJ45". Much of this article is a listing of what registered jacks are not. "True RJ45" is mentioned but never defined and all RJ45 links in this article point back to the 8P8C page which says "the true RJ45 uses a different 8P modular connector type". If RJ45 doesn't use 8P8C, then RJ45 shouldn't be used to link to the 8P8C page. Can anyone provide any information regarding the actual RJ45 specs? What's the physical jack type? What's the wiring pattern? —Preceding unsigned comment added by 76.26.210.156 ( talk) 15:03, 13 July 2009 (UTC)
DB: RJ45 ABSOLUTELY uses a 8 position keyed miniature modular jack; programmed. It "can" be 8P4C, because only a single cable pair is used (pins 4 and 5), plus a programming resistor is placed on pins 7 and 8. It's use really should be obsolete by now, and trying to use "RJ45" nomenclature inside the customer premises will only continue the mass confusion.
I was there hooking up modems to RJ45 and RJ41 NIs these jacks both used a 8p8c Keyed modular form factor Pair 1 the center pair pins 4 and 5 connected to the Tip and Ring pins 7 and 8 connected to a Fixed Loss Loop/Dry loop for rj41 and a resistor for rj45 (the resistor was located in the JACK not the Plug) some of the Jacks had a switch to select either fll/pr so they could be used for either - this resistor/dry loop was used to tell the modem what the signal loss was from the CO to the premises.
These pages seem to be an attempt to correct the "RJ" vs incorrectly applied usages of the RJ terms; Therefore
note the passage that says "RJ21 connectors are used to connect Ethernet ports in bulk from a switch with RJ21 ports to a CAT-5 rated patch panel, or between two patch panels. A cable with an RJ21 connector on one end can support 12 8P8C "RJ45" connectors or Ethernet ports on a patch panel."
In this case shouldn't it refer to the connector (genearally called an "Amphenol" connector) not RJ21 Amphenol 25-pair/50-position "Micro Ribbon" or CHAMP see http://en.wikipedia.org/wiki/Micro_ribbon or ( http://www.amphenolcanada.com/ProductSearch/pdf/MICRORIBBON_CAT.pdf) (the 36 position often called the centronics Parallel connector - which also actual refers to how its wired and not the connecor's actual name) —Preceding unsigned comment added by 216.99.201.90 ( talk) 21:15, 8 December 2010 (UTC)
"Uniform" or "Universal" Service Order Code - the snippet view of US CFR shows "Universal", but "Uniform" is popular among many cable books. Or did it change? -- Wtshymanski ( talk) 16:54, 31 August 2011 (UTC)
Can I Request a picture of the RJ45S Keyed Jack be added to the article? Never seen one, and keep on getting pointed to 8P8C "RJ45" Connectors. Would a comparison picture help illustrate the difference, or do they look the same on physical inspection? 80.46.254.196 ( talk) 15:35, 13 February 2012 (UTC)
I am trying to locate a source for offset tab registered jacks, as a sort of keying to keep people from plugging things into the wrong connector (I hate USB-over-CAT5). However I have no idea what the official name is for this to try to search for product options.
I know older terminal devices like DEC VT-420's used them for keyboards. Someone must still be making 8-pin versions of the plugs and sockets, with both a left-offset and right-offset tab.
DMahalko ( talk) 19:48, 9 November 2012 (UTC)
Particularly in DSL cables, but also generally, polarity is reversed on POTS / PSTN cables.
E.g., center wires will be Green / Red on one end and Red / Green on the other on an RJ11.
Wiring on an RJ14 will be
Yellow / Green / Red / Black
one end, and on the other, exactly reversed,
Black / Red / Green / Yellow.
Just discovered that the Wii controller for Guitar Hero had an RJ14 port, intended to support peripherals, but nothing was ever released.[www.ehow.com/about_6631099_purpose-guitar-hero-x_plorer-controllers.html] It would be nice if this info could be somehow included in the article. -- Auric talk 19:37, 20 September 2013 (UTC)
Link to Italian page https://it.wikipedia.org/wiki/RJ-45 is missing. I've tried to add it, but I get an error. At the same time I see that the corresponding Italian pages in all other languages, i.e. https://fr.wikipedia.org/wiki/RJ45, are missing the link to this English page. How to solve it? I don't know how. -- Oriettaxx ( talk) 07:55, 8 January 2015 (UTC)
I believe the image of the RJ25 connector is incorrect. The arrow pointing to Pin1 is (i think) actually pointing to pin 6. — Preceding unsigned comment added by Conjac ( talk • contribs) 08:58, 6 November 2015 (UTC)
Could someone add the info at http://pinouts.ru/NetworkCables/ethernet_10_100_1000_pinout.shtml in terms of what all the RJ-45 wires' uses are?
It's been so long, and, this article doesn't even state what all the 8 wires do, in terms of receive data, transmit data, and bidirectional.
Thanks. — Preceding unsigned comment added by 5.2.200.233 ( talk) 18:46, 14 November 2016 (UTC)
This page says the RJ standards DO define the physical dimensions: /info/en/?search=Registered_jack This page says the RJ standards don’t define the physical dimensions: /info/en/?search=Modular_connector I have no horse in this race, but as a casual user who just stopped by, I saw the contradiction and figured I'd mention it to someone who knows better. 40.135.213.18 ( talk) 15:15, 11 May 2017 (UTC)Joe 40.135.213.18 ( talk) 15:15, 11 May 2017 (UTC)
I am seeing RJ connectors named both with and without a hyphen (e.g. RJ45 vs. RJ-45). I notice that this Wikipedia article omits the hyphen while all of the parallel articles in other languages (at least the ones I've checked) use the hyphen.
Is there a right and a wrong here? YossiD ( talk) 08:22, 8 August 2019 (UTC)
No, no, no, there's no "right" or "wrong" on Wikipedia - there's only "unsourced" and "consensus". But in the context of FCC regulations of the phone companies talking about USOC order codes, they seem not to use a hyphen. Let's see what consensus says, that's our only hope here. -- Wtshymanski ( talk) 17:37, 16 August 2019 (UTC)
RJ.5 registered Jack or not? — Preceding unsigned comment added by 46.47.203.165 ( talk) 13:43, 21 January 2020 (UTC)
This is the
talk page for discussing improvements to the
Registered jack article. This is not a forum for general discussion of the article's subject. |
Article policies
|
Find sources: Google ( books · news · scholar · free images · WP refs) · FENS · JSTOR · TWL |
![]() | This article is rated C-class on Wikipedia's
content assessment scale. It is of interest to the following WikiProjects: | ||||||||||||||||||||||||||
|
![]() | The contents of the RJ11, RJ14, RJ25 page were merged into Registered jack on 2010-02-23. For the contribution history and old versions of the redirected page, please see its history; for the discussion at that location, see its talk page. |
![]() | The contents of the RJ21 page were merged into Registered jack on 2010-10-16. For the contribution history and old versions of the redirected page, please see its history; for the discussion at that location, see its talk page. |
![]() | The contents of the RJ48 page were merged into Registered jack on 2010-10-16. For the contribution history and old versions of the redirected page, please see its history; for the discussion at that location, see its talk page. |
![]() | The contents of the RJ61 page were merged into Registered jack on 2010-10-16. For the contribution history and old versions of the redirected page, please see its history; for the discussion at that location, see its talk page. |
Try http://www.bnoack.com/data/cables/RJ_types.html for a table that shows the difference between RJs 10, 11, 12, 14, 45, 48.
wgustafson@leviton.com
I think there should be a section explaining how jacks are inserting into various types of telecommunication equipment like Keystone wall plates and surface mount boxes. In a professional job, you would not terminate a cable to a jack without securing it to something. Chewbaggins ( talk) 26 May 2009 —Preceding undated comment added 21:16, 26 May 2009 (UTC).
Jacks do not need to be "secured". Common examples include telephone extension cables with 4P connectors, a plug at one end and a jack at the other, where the connectors and cable itself are not secured to anything. Also jacks are found in so-called couplers (a telephone cable gender bender), for joining two telephone cables by their plugs. The coupler is not usually attached to anything and so 2 jacks are in fact not "secured". It is an important distinction that an extension cable uses a connector of each sex to extend a cable. Regular telephone cables for instance are terminated with two male plugs at each end to connect a telephone to the phone system.
It should perhaps be emphasized that telephone line cables are usually cross-wired and that Ethernet network line cables use straight-through wiring. This is significant if using 8P8C couplers to extend a network cable (which is not really recommended) since they exist in two "flavours", cross-wired for telephone use and straight-through for Ethernet use. Cross-wired as used above is not ambiguous in that each individual wire is considered. So called cross-wired Ethernet cables are not fully cross-wired cables but rather cross-paired and then only pairs 2 and 3 are switched while pairs 1 and 4 (if present),and their wires, are still straight-through, which is why the adjective "Ethernet" is included to emphasize the specificity of such a cable's wiring pattern.
99.254.69.141 ( talk) 17:25, 19 November 2010 (UTC)
The naming confusion section refers to RJ11 as "six-position" and then in the next sentence "The four-position RJ-11". The picture labels the four pin plug as "RJ11".
It also suggests that RJ11 is a two wire standard. The source above disagrees with this. I don't like to do it, because I don't know enough about the subject - but I'd suggest removing this "naming confusion" section until it actually addresses the naming confusion clearly.
DB: RJ11 uses a 6 position mini- modular jack, but only pins 3 and 4 are used. Other 6 position RJs use 4 pins. Knowing it's foolish to have to stock 6P2C and 6P4C jacks, CFR 47 Part 68.500 states "Note: This jack is depicted equipped with 4 contacts; it may be fabricated with it's full 6 contact capacity." Similar notations were made for "some" other jacks.
http://www.sundance-communications.com/forum/Forum24/HTML/000065.html has discussion on this subject by some people who are keen on getting it right. The feeling I get is that RJ-xx is not the correct name for the plug or socket, but is in fact the wiring standard. From that discussion:
-- AndyP 17:03, 2 December 2005 (UTC)
Bryan Henderson 21:47, 18 August 2006 (UTC)
-- adaptr ( talk) 12:46, 19 December 2007 (UTC)
DB: FCC CFR47 Part 68.502. CFR is Code of Federal Regulations
I checked the GPO Access site, and there is no 47CFR68.502; at least, not in the latest revisions. Why is this citation still here? Nulbyte 01:55, 5 May 2006 (UTC)
DB: Now that IS a problem. You absolutely cannot use a RJ12 for a 6P6C. RJ12 is not hardware, it is a wiring plan, and the 6P6C miniature modular jack, obviously, IS hardware. You must use the 6 "position" mini-modular jack for RJ14C/W. It's plan uses only pins 2 through 5, so you can use either a 6P4C or a 6P6C... that part is a "who cares?"
Is this another example of the kind of misuse we have seen with RJ45? Lego ( with reference to the mindstorms nxt) and microchip ( with reference to the icd2) both seem to use it. What other uses does a 6P6C connector have and do its users also reffer to it as a RJ12? (i'm not discussing right or wrong here, just actual use) Plugwash 00:25, 11 September 2006 (UTC)
DB: Other uses of 6P6C: RJ18C/W, RJ25C, RJ1DC,
DB: You should think in terms of right and wrong. It will make more sense if you do.
Simplify! Just use RJ45 jacks wired T568A and you can use it for phone - 1,2, 3 and 4 lines; the majority of phone systems; LAN; various media distribution (HDTV) systems; and more - that's basically become the d-facto standard (kinda). For example, just plug an RJ11,12, etc into a RJ45 jack, plug the other end of the wire into a phone distribution module in the distributed wiring enclosure and BAM it's a phone jack. Or plug your RJ45 from your computer into the jack with the other end of the wire into a network router in the distributed wiring enclosure and BAM it's a network port. - So again, just use RJ45 jacks wired T568A. (in MOST situations-there are always exceptions to everything...) —Preceding unsigned comment added by Sbg1959 ( talk • contribs) 13:37, 10 November 2007 (UTC)
DB: That simplifies nothing. RJ45 is NOT a jack, it's a wiring plan. Standard wiring configurations T568A and B use the 8 position min-modular jack and provide Standard coding (color code, etc) for four cable pairs. T568A and B are specific to wiring "within" a customer premises. Trying to use RJ45 as you discuss, is irrelevant.
http://en.wikipedia.org/wiki/Twisted_pair discusses shielding and
screening in a cable and mentions that it is ineffective unless a
shield or screen is grounded. This is probably achieved through the
jack, but how? All the jacks in this article are plastic with no
mention of a ground.
Regards, ...
PeterEasthope (
talk)
05:04, 2 February 2008 (UTC)
Thanks Plugwash. Does anyone have a picture of one
of these? Anyone care to mention under "Uncommon types"?
Perhaps grounding warrants a new heading.
Regards, ...
PeterEasthope (
talk)
15:36, 13 February 2008 (UTC)
There is no "Middle two", methinks. What's a better way to say this?
216.79.193.84 ( talk) 15:35, 13 November 2008 (UTC)
The article is headed "Registered jack" (which makes sense according to it's definition) but contains frequent references to "Registration jack", which makes no sense to me. Is this just sloppiness/typos or is there some rationale to it? —Preceding unsigned comment added by 62.49.27.35 ( talk) 13:48, 7 April 2009 (UTC)
DB: 8/10/09 I hope this will help: Jacks are NOT registered, telephones ARE registered. The FCC Registration Program outlines the technical requirements, at The Network Interface, for telephones to be connected to the "Network," and it details the NI type and their wiring for use by both the Telco (jack), on their side of the NI, and the Customer (plug) on their side of the NI (aka the Customer Premises). The NI connector identifications are actually Universal Service Order Codes (USOC) which are used by the Telcos, and the codes were adopted by the FCC and the ANSI Standards bodies. They are correctly called Registration Jacks because they are "of " the registration program, but are not registered.
DB: Also, the codes such as RJ11 define a wiring plan at the NI, not a jack type (6 pin mini-modular). A particular jack type may serve many different wiring plans, i.e., the 6 position mini-modular jack is used for the following.... RJ11C/W, RJ14C/W, RJ18C/W, etc.
DB: And finally, jacks used within the customer premises, but NOT at the NI, are NOT Registration Jacks, and are correctly called by either their type (for example 8 position mini-modular) or by a non-NI code, for example, "T568A" or "T568B," etc, which use the 8P8C jack.
DB: You can't put 8 connections on a 6-pin jack. No such thing exists.
Our university dorms used 6p8c jack and plugs to deliver networking in each customers room until very recently. I didn't see any mention of jacks that have a higher 'c' than 'p' numbers. Should they be in the uncommon section? Larek ( talk) 13:01, 30 April 2009 (UTC)
"True RJ45" redirects to this article, but this article does nothing to define "true RJ45". Much of this article is a listing of what registered jacks are not. "True RJ45" is mentioned but never defined and all RJ45 links in this article point back to the 8P8C page which says "the true RJ45 uses a different 8P modular connector type". If RJ45 doesn't use 8P8C, then RJ45 shouldn't be used to link to the 8P8C page. Can anyone provide any information regarding the actual RJ45 specs? What's the physical jack type? What's the wiring pattern? —Preceding unsigned comment added by 76.26.210.156 ( talk) 15:03, 13 July 2009 (UTC)
DB: RJ45 ABSOLUTELY uses a 8 position keyed miniature modular jack; programmed. It "can" be 8P4C, because only a single cable pair is used (pins 4 and 5), plus a programming resistor is placed on pins 7 and 8. It's use really should be obsolete by now, and trying to use "RJ45" nomenclature inside the customer premises will only continue the mass confusion.
I was there hooking up modems to RJ45 and RJ41 NIs these jacks both used a 8p8c Keyed modular form factor Pair 1 the center pair pins 4 and 5 connected to the Tip and Ring pins 7 and 8 connected to a Fixed Loss Loop/Dry loop for rj41 and a resistor for rj45 (the resistor was located in the JACK not the Plug) some of the Jacks had a switch to select either fll/pr so they could be used for either - this resistor/dry loop was used to tell the modem what the signal loss was from the CO to the premises.
These pages seem to be an attempt to correct the "RJ" vs incorrectly applied usages of the RJ terms; Therefore
note the passage that says "RJ21 connectors are used to connect Ethernet ports in bulk from a switch with RJ21 ports to a CAT-5 rated patch panel, or between two patch panels. A cable with an RJ21 connector on one end can support 12 8P8C "RJ45" connectors or Ethernet ports on a patch panel."
In this case shouldn't it refer to the connector (genearally called an "Amphenol" connector) not RJ21 Amphenol 25-pair/50-position "Micro Ribbon" or CHAMP see http://en.wikipedia.org/wiki/Micro_ribbon or ( http://www.amphenolcanada.com/ProductSearch/pdf/MICRORIBBON_CAT.pdf) (the 36 position often called the centronics Parallel connector - which also actual refers to how its wired and not the connecor's actual name) —Preceding unsigned comment added by 216.99.201.90 ( talk) 21:15, 8 December 2010 (UTC)
"Uniform" or "Universal" Service Order Code - the snippet view of US CFR shows "Universal", but "Uniform" is popular among many cable books. Or did it change? -- Wtshymanski ( talk) 16:54, 31 August 2011 (UTC)
Can I Request a picture of the RJ45S Keyed Jack be added to the article? Never seen one, and keep on getting pointed to 8P8C "RJ45" Connectors. Would a comparison picture help illustrate the difference, or do they look the same on physical inspection? 80.46.254.196 ( talk) 15:35, 13 February 2012 (UTC)
I am trying to locate a source for offset tab registered jacks, as a sort of keying to keep people from plugging things into the wrong connector (I hate USB-over-CAT5). However I have no idea what the official name is for this to try to search for product options.
I know older terminal devices like DEC VT-420's used them for keyboards. Someone must still be making 8-pin versions of the plugs and sockets, with both a left-offset and right-offset tab.
DMahalko ( talk) 19:48, 9 November 2012 (UTC)
Particularly in DSL cables, but also generally, polarity is reversed on POTS / PSTN cables.
E.g., center wires will be Green / Red on one end and Red / Green on the other on an RJ11.
Wiring on an RJ14 will be
Yellow / Green / Red / Black
one end, and on the other, exactly reversed,
Black / Red / Green / Yellow.
Just discovered that the Wii controller for Guitar Hero had an RJ14 port, intended to support peripherals, but nothing was ever released.[www.ehow.com/about_6631099_purpose-guitar-hero-x_plorer-controllers.html] It would be nice if this info could be somehow included in the article. -- Auric talk 19:37, 20 September 2013 (UTC)
Link to Italian page https://it.wikipedia.org/wiki/RJ-45 is missing. I've tried to add it, but I get an error. At the same time I see that the corresponding Italian pages in all other languages, i.e. https://fr.wikipedia.org/wiki/RJ45, are missing the link to this English page. How to solve it? I don't know how. -- Oriettaxx ( talk) 07:55, 8 January 2015 (UTC)
I believe the image of the RJ25 connector is incorrect. The arrow pointing to Pin1 is (i think) actually pointing to pin 6. — Preceding unsigned comment added by Conjac ( talk • contribs) 08:58, 6 November 2015 (UTC)
Could someone add the info at http://pinouts.ru/NetworkCables/ethernet_10_100_1000_pinout.shtml in terms of what all the RJ-45 wires' uses are?
It's been so long, and, this article doesn't even state what all the 8 wires do, in terms of receive data, transmit data, and bidirectional.
Thanks. — Preceding unsigned comment added by 5.2.200.233 ( talk) 18:46, 14 November 2016 (UTC)
This page says the RJ standards DO define the physical dimensions: /info/en/?search=Registered_jack This page says the RJ standards don’t define the physical dimensions: /info/en/?search=Modular_connector I have no horse in this race, but as a casual user who just stopped by, I saw the contradiction and figured I'd mention it to someone who knows better. 40.135.213.18 ( talk) 15:15, 11 May 2017 (UTC)Joe 40.135.213.18 ( talk) 15:15, 11 May 2017 (UTC)
I am seeing RJ connectors named both with and without a hyphen (e.g. RJ45 vs. RJ-45). I notice that this Wikipedia article omits the hyphen while all of the parallel articles in other languages (at least the ones I've checked) use the hyphen.
Is there a right and a wrong here? YossiD ( talk) 08:22, 8 August 2019 (UTC)
No, no, no, there's no "right" or "wrong" on Wikipedia - there's only "unsourced" and "consensus". But in the context of FCC regulations of the phone companies talking about USOC order codes, they seem not to use a hyphen. Let's see what consensus says, that's our only hope here. -- Wtshymanski ( talk) 17:37, 16 August 2019 (UTC)
RJ.5 registered Jack or not? — Preceding unsigned comment added by 46.47.203.165 ( talk) 13:43, 21 January 2020 (UTC)