Re: CM10A serial controller RJ10 pinouts

[msg@xxxxxxxxx]

Bob wrote:
> Some of your confusion may be due to the fact that there is no such
> thing as a 6 pin RJ 11, it is really called an RJ-25.  Also, the pins
> are numbered from the middle out.
>
> Take a look at: http://en.wikipedia.org/wiki/RJ-11
>

I've seen that numbering scheme as well, but I will quote from the Data
Communications PAL Engineering Reference:

There are four basic modular jack styles. The 8-position
and 8-position keyed modular jacks are commonly and
incorrectly referred to as RJ45 and keyed RJ45
(respectively). The 6-position modular jack is commonly
referred to as RJ11.  Using these terms can sometimes
lead to confusion since the RJ designations actually refer
to very specific wiring configurations called Universal Service
Ordering Codes (USOC).  The designation 'RJ' means
Registered Jack.  Each of these 3 basic jack styles can be
wired for different RJ configurations.  For example, the 6-
position jack can be wired as an RJ11C (1-pair), RJ14C
(2-pair) or RJ25C (3-pair) configuration...

The diagrams accompanying the explanation depict all
physical jacks and pin assignments; although pair assignments
may be built-out from the center, pin numbering remains
the same as is depicted in my previous post.

Regards,

Michael