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RJ11

T

terry

Jan 1, 1970
0
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!
 
K

Kim Clay

Jan 1, 1970
0
Kim posted:



Better check out the following post - its best "RJ" guide I know of!
http://groups.google.com/groups?hl=en&lr=&[email protected]
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
 
K

Kim Clay

Jan 1, 1970
0
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.


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
 
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