Here is the connector it has to go into.
I found three other cable sites with the identical page you shared (but
came up much more quickly).
Certainly looks like MMJ to me. that was what I searched for as well.
http://www.pacificcable.com/photos/PT-J250-6DEC.jpg
thanks
jim
On 4/8/2017 11:54 AM, Gregory Beat via cctalk wrote:
Paul,
Are these the "offset clip" RJ-12 6p6c modular jacks?
https://www.showmecables.com/dec-rj12-6p6c-modular-plug-flat-cable
greg
chicago
Sent from iPad Air