What do peopel (incorrectly) mean by RJ9, RJ10, RJ22 ?

P

Peter

Guest
I often see references to these phone plugs RJ9, RJ10, RJ22.

It turns out those are non-standard names for a 4P4C connector.
http://en.wikipedia.org/wiki/4P4C

What are the people who use these names likely to mean?

Could they be using another name than 4P4C if the connector pins on the
lead are wired in a certain way? (For example: outer and inner pairs,
outer pair only, only pins 1 and 2, etc)

Could they be using a name based on the function which the lead performs?
(For example: handset lead, recording adaptor lead, etc)
 
"Peter" <invalid@invalid.invalid> schreef in bericht
news:Xns9C397C2E0D08D5D4AM2@news.x-privat.org...
I often see references to these phone plugs RJ9, RJ10, RJ22.

It turns out those are non-standard names for a 4P4C connector.
http://en.wikipedia.org/wiki/4P4C

What are the people who use these names likely to mean?

Could they be using another name than 4P4C if the connector pins on the
lead are wired in a certain way? (For example: outer and inner pairs,
outer pair only, only pins 1 and 2, etc)

Could they be using a name based on the function which the lead performs?
(For example: handset lead, recording adaptor lead, etc)
Click to expand...
RJ-numbers are well defined standards in a telco environment. It describes
signal names and wires used on several plugs/jacks. So using the name RJxx
in a network or other nontelco environment is misleading. It is about the
same common error like using RS232 for a DB25 or DB9 connector. As the wiki
article already stated, handset leads and the like have no RJ-- definition,
being a part of an appliance, not of the network itself. FAIK there is no
official standard for this type of connections, so 4p4c is the best you can
name it. At the same time you'd better be aware that not all manufacturers
use the same pinout.

petrus bitbyter
 
petrus bitbyter wrote:
"Peter" <invalid@invalid.invalid> schreef in bericht
news:Xns9C397C2E0D08D5D4AM2@news.x-privat.org...
I often see references to these phone plugs RJ9, RJ10, RJ22.

It turns out those are non-standard names for a 4P4C connector.
http://en.wikipedia.org/wiki/4P4C

What are the people who use these names likely to mean?

Could they be using another name than 4P4C if the connector pins on the
lead are wired in a certain way? (For example: outer and inner pairs,
outer pair only, only pins 1 and 2, etc)

Could they be using a name based on the function which the lead performs?
(For example: handset lead, recording adaptor lead, etc)

RJ-numbers are well defined standards in a telco environment. It describes
signal names and wires used on several plugs/jacks. So using the name RJxx
in a network or other nontelco environment is misleading. It is about the
same common error like using RS232 for a DB25 or DB9 connector. As the wiki
article already stated, handset leads and the like have no RJ-- definition,
being a part of an appliance, not of the network itself. FAIK there is no
official standard for this type of connections, so 4p4c is the best you can
name it. At the same time you'd better be aware that not all manufacturers
use the same pinout.
Click to expand...

DE9. DB is the shell size.


--
You can't have a sense of humor, if you have no sense!
 
"Peter" <invalid@invalid.invalid> wrote in message
news:Xns9C397C2E0D08D5D4AM2@news.x-privat.org...
I often see references to these phone plugs RJ9, RJ10, RJ22.

It turns out those are non-standard names for a 4P4C connector.
http://en.wikipedia.org/wiki/4P4C

What are the people who use these names likely to mean?

Could they be using another name than 4P4C if the connector
pins on the
lead are wired in a certain way? (For example: outer and inner
pairs,
outer pair only, only pins 1 and 2, etc)

Could they be using a name based on the function which the lead
performs?
(For example: handset lead, recording adaptor lead, etc)
Click to expand...


As a general rule - as your Wiki link shows,

RJ9 is 4P4C
RJ11 is 6P4C - that is a six-pin carrier that can have all six
pins present or the middle four only
RJ12 is 6P6C
RJ45 is 8P8C

Many people do not recognise the difference between RJ11 and
RJ12, using RJ11 for both.


--
Woody

harrogate three at ntlworld dot com
 
"Michael A. Terrell" <mike.terrell@earthlink.net> schreef in bericht
news:4A48BD2D.74F64607@earthlink.net...
petrus bitbyter wrote:

"Peter" <invalid@invalid.invalid> schreef in bericht
news:Xns9C397C2E0D08D5D4AM2@news.x-privat.org...
I often see references to these phone plugs RJ9, RJ10, RJ22.

It turns out those are non-standard names for a 4P4C connector.
http://en.wikipedia.org/wiki/4P4C

What are the people who use these names likely to mean?

Could they be using another name than 4P4C if the connector pins on the
lead are wired in a certain way? (For example: outer and inner pairs,
outer pair only, only pins 1 and 2, etc)

Could they be using a name based on the function which the lead
performs?
(For example: handset lead, recording adaptor lead, etc)

RJ-numbers are well defined standards in a telco environment. It
describes
signal names and wires used on several plugs/jacks. So using the name
RJxx
in a network or other nontelco environment is misleading. It is about the
same common error like using RS232 for a DB25 or DB9 connector. As the
wiki
article already stated, handset leads and the like have no RJ--
definition,
being a part of an appliance, not of the network itself. FAIK there is no
official standard for this type of connections, so 4p4c is the best you
can
name it. At the same time you'd better be aware that not all
manufacturers
use the same pinout.


DE9. DB is the shell size.


--
You can't have a sense of humor, if you have no sense!
Click to expand...
Ah, I see. Please forgive me. It's only a minor mistake after all :)

petrus bitbyter
 
--
You can't have a sense of humor, if you have no sense!
petrus bitbyter wrote:
"Michael A. Terrell" <mike.terrell@earthlink.net> schreef in bericht
news:4A48BD2D.74F64607@earthlink.net...

petrus bitbyter wrote:

"Peter" <invalid@invalid.invalid> schreef in bericht
news:Xns9C397C2E0D08D5D4AM2@news.x-privat.org...
I often see references to these phone plugs RJ9, RJ10, RJ22.

It turns out those are non-standard names for a 4P4C connector.
http://en.wikipedia.org/wiki/4P4C

What are the people who use these names likely to mean?

Could they be using another name than 4P4C if the connector pins on the
lead are wired in a certain way? (For example: outer and inner pairs,
outer pair only, only pins 1 and 2, etc)

Could they be using a name based on the function which the lead
performs?
(For example: handset lead, recording adaptor lead, etc)

RJ-numbers are well defined standards in a telco environment. It
describes
signal names and wires used on several plugs/jacks. So using the name
RJxx
in a network or other nontelco environment is misleading. It is about the
same common error like using RS232 for a DB25 or DB9 connector. As the
wiki
article already stated, handset leads and the like have no RJ--
definition,
being a part of an appliance, not of the network itself. FAIK there is no
official standard for this type of connections, so 4p4c is the best you
can
name it. At the same time you'd better be aware that not all
manufacturers
use the same pinout.


DE9. DB is the shell size.


--
You can't have a sense of humor, if you have no sense!

Ah, I see. Please forgive me. It's only a minor mistake after all :)
Click to expand...

No problem. Its just that I've used the Cannon designed subminiature
'D' series connectors for so long that it bugs me to see them given the
wrong name.

http://en.wikipedia.org/wiki/D-sub
 
"Peter" <invalid@invalid.invalid> wrote in message
news:Xns9C397C2E0D08D5D4AM2@news.x-privat.org...
I often see references to these phone plugs RJ9, RJ10, RJ22.

It turns out those are non-standard names for a 4P4C connector.
http://en.wikipedia.org/wiki/4P4C

What are the people who use these names likely to mean?

Could they be using another name than 4P4C if the connector pins on the
lead are wired in a certain way? (For example: outer and inner pairs,
outer pair only, only pins 1 and 2, etc)

Could they be using a name based on the function which the lead performs?
(For example: handset lead, recording adaptor lead, etc)
Click to expand...
Also see
http://en.wikipedia.org/wiki/RJ11,_RJ14,_RJ25

Mike.
 
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