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)

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.


   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)
>



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"  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 :)

petrus bitbyter

-- 
You can't have a sense of humor, if you have no sense!
petrus bitbyter wrote:
> 
> "Michael A. Terrell"  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 :)


   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)

Also see
http://en.wikipedia.org/wiki/RJ11,_RJ14,_RJ25

Mike.