Alright gunrunnerjohn, I'll fess up and tell a story on myself! Moonman nailed it. I had been putting a lot of hours in at work and the only time I had to read and work on trains was late at night.
I was getting ready to hookup the AIU to the TIU and get some switches installed for DCS.
I "THOUGHT" I read that I needed the 6 conductor crossover telephone wire. I spent several days on-line searching, checking out the forum, etc. and just couldn't get there (again in the wee hours of the night) and decided to post.
It wasn't until the end of the post that I was able to re-read the information and saw that the 6 connector crossover tele wire was the phone plug look alike for the AIU to connect to the TIU (and of course it came with the AIU).
So, not only did I look for the wrong thing, I need to apologize to EVERYONE who posted trying to help. I was only in need of the accessory wire which I have and you can get anywhere. My apologies ALL.
gunrunnerjohn. Thanks for asking the question. I need to get the missteps out there and will try not to do this again (although electricity is not my best skill set).
Thanks again everyone, Terry