Isn't the RJ-24x made of Phantonium? I know they pulled a lot of obscure designations, but I missed the 24. Maybe that was a non-US or special manufacturer's unauthorized designation.

Carl This is where you link to your research..... USOC

The RJ-61 is missing from this list. It's an 8-pin T&R plug for 4 lines in the 54362718 order.