RJ11

[terry]

Hi,

Just a simple question.

I know RJ11 has 4 pins. For 6 pins version, is it still called RJ11? I
know 8 pins version is called RJ45.

Thanks!

 

[Kim Clay]

On 3 Dec 2004 17:43:58 -0800, leonlai2k@yahoo.com (terry) wrote:

Hi,

Just a simple question.

I know RJ11 has 4 pins. For 6 pins version, is it still called RJ11? I
know 8 pins version is called RJ45.

Thanks!

Better check out the following post - its best "RJ" guide I know of!
http://groups.google.com/groups?hl=en&lr=&selm=6baf62%24lje%40rukbat.cs.unc.edu&rnum=3

or http://tinyurl.com/5e69c

 

[Dbowey]

Kim posted:

<< On 3 Dec 2004 17:43:58 -0800, leonlai2k@yahoo.com (terry) wrote:

Hi,

Just a simple question.

I know RJ11 has 4 pins. For 6 pins version, is it still called RJ11? I
know 8 pins version is called RJ45.

Thanks!

Better check out the following post - its best "RJ" guide I know of!
http://groups.google.com/groups?hl=en&lr=&selm=6baf62%24lje%40rukbat.cs.un
c.edu&rnum=3

or http://tinyurl.com/5e69c

The RJ11 is a "6 position miniature modular jack," which uses pin 3 for the
Ring wire and pin 4 for the Tip wire. In the RJ11 configuration the other
positions are not used; if there are pins in positions 1, 2, 5, and 6, it is
not relevant to the RJ11 configuration for wiring.

RJ11 is NOT a Registered Jack as erroneously stated in the two links. RJ
denotes Registration Jack; they are of the Registration Program, but are NOT
registered.

Both the 6 position and 8 position jacks are used in several RJ configurations.
For examples, the 8 position jack may be used as a RJ41S, RJ45S, RJ61X, RJ4MB,
RJ1CX, RJ48C, RJ48S.

When the 8 position jack is used in an Ethernet connection, it is NOT an RJ45,
although many suppliers sell them that way.

Don

 

[terry]

Better check out the following post - its best "RJ" guide I know of!
http://groups.google.com/groups?hl=en&lr=&selm=6baf62%24lje%40rukbat.cs.unc.edu&rnum=3

or http://tinyurl.com/5e69c

Clarified a lot, but still have a question:

What is the physical difference between a RJ12 & RJ14 socket? They
both are 6 positions and 4 pins, do the pin positions differ?

Thanks!

 

[Kim Clay]

On 04 Dec 2004 09:28:31 GMT, dbowey@aol.com (Dbowey) wrote:

Kim posted:

On 3 Dec 2004 17:43:58 -0800, leonlai2k@yahoo.com (terry) wrote:

Hi,

Just a simple question.

I know RJ11 has 4 pins. For 6 pins version, is it still called RJ11? I
know 8 pins version is called RJ45.

Thanks!

Better check out the following post - its best "RJ" guide I know of!
http://groups.google.com/groups?hl=en&lr=&selm=6baf62%24lje%40rukbat.cs.un
c.edu&rnum=3

or http://tinyurl.com/5e69c



The RJ11 is a "6 position miniature modular jack," which uses pin 3 for the
Ring wire and pin 4 for the Tip wire. In the RJ11 configuration the other
positions are not used; if there are pins in positions 1, 2, 5, and 6, it is
not relevant to the RJ11 configuration for wiring.

RJ11 is NOT a Registered Jack as erroneously stated in the two links. RJ
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

According to the "Abbreviations and Acronyms" page at "The Alliance for
Telecommunications Industry Solutions (ATIS)
http://www.atis.org/ which _claims_ to represent "more than 350
communications companies"

RJ = registered jack.
http://www.atis.org/tg2k/_registered_jack.html

The full "Abbreviations and Acronyms" page is located at:
http://www.atis.org/tg2k/t1g-abrv.html

If this definition is in error I am sure they will correct it upon
notification.

Kim

denotes Registration Jack; they are of the Registration Program, but are NOT
registered.

Both the 6 position and 8 position jacks are used in several RJ configurations.
For examples, the 8 position jack may be used as a RJ41S, RJ45S, RJ61X, RJ4MB,
RJ1CX, RJ48C, RJ48S.

When the 8 position jack is used in an Ethernet connection, it is NOT an RJ45,
although many suppliers sell them that way.

Don

 

[Kim Clay]

On 4 Dec 2004 04:25:09 -0800, leonlai2k@yahoo.com (terry) wrote:

Better check out the following post - its best "RJ" guide I know of!
http://groups.google.com/groups?hl=en&lr=&selm=6baf62%24lje%40rukbat.cs.unc.edu&rnum=3

or http://tinyurl.com/5e69c

Clarified a lot, but still have a question:

What is the physical difference between a RJ12 & RJ14 socket? They

No physical difference

both are 6 positions and 4 pins, do the pin positions differ?

No - they look identical but what the pins connect to differs.

Thanks!

Remember that this RJxx definition does not just define the physical
characteristics of the jack. It's what the jack is connected to that
defines its RJ number as well.

RJ12 6p4c single T/R line, with A/A1 for 1A2 lamp control (PBX)
RJ14 6p4c two independent T/R lines

OK - Guessing - you got confused by a misleading statement from the
guide above:
"For example and RJ12 and RJ14 both use the same jack, but are wired the
same."
I think it is some cut-n-paste error. They are not wired the same.

Both RJ12 & RJ14 jacks are 6p4c jacks. The RJ14 contains two phone
lines (a total of 4 conductors) & the RJ12 has one phone line &
conductors for the A & A1 lamp control of a PBX (also a total of 4
conductors).

Kim

 

[Dbowey]

Kim posted:

<< According to the "Abbreviations and Acronyms" page at "The Alliance for
Telecommunications Industry Solutions (ATIS)
http://www.atis.org/ which _claims_ to represent "more than 350
communications companies"

RJ = registered jack.
http://www.atis.org/tg2k/_registered_jack.html

The full "Abbreviations and Acronyms" page is located at:
http://www.atis.org/tg2k/t1g-abrv.html

If this definition is in error I am sure they will correct it upon
notification.
FYI....... emailed to ATIS.

Greetings,

T1A1/PRQC, in it's glossary, has defined "RJ" (of the FCC CFR47, Part 68) as
*Registered Jack*.

When T1C1/T1E1 wrote Technical Report #5, the Connector catalog, RJ was defined
as "Registration Jack." The reason being that the connector (jack) is *Not*
registered, but is *of* the FCC Registration Program.

I believe Registration Jack is the correct term.

I've been away from T1/ATIS work for so long, I know my knowledge could be
lagging changes, but I do understand the Registration Program very well, and
cannot perceive a reason to re-define RJ to indicate the jacks are registered
when they are not.

I suggest this issue be forwarded to the TSC or Working Group that is
responsible for the Network Interface Connector Catalog to reconsider the
definition in the PRQC Glossary.

Keep up the good work. Is Jim Eitel stll on ATIS?

Thanks,
Don Bowey
Past member and Vice Chair of T1C1/TiE1. Past member of Working Groups .1, .2,
and .3 (NI connectors).