We've been tripping over this 110 unit for about 5 years after it mysteriously appeared after a demo job we did.

When do you use these, and for what applications?

Thanks

I tend to see them in hospital provider installs, for voice station cabling (at least 5 or so that I can think of immediately). I personally don't like them (yes the ol 66/110 debate), but they work well, when installed and terminated correctly. What a pain to troubleshoot a bad cable on though!

I think Lucent made them too, but not positive.

When do you use these
When another vendor has them installed and I want to keep it uniform.

and for what applications
For large 110 applications. We have used them for jobs that have had 1000+ station cables. Keeps the backboard neat although some would argue that it's overkill.

No doubt that it is overkill, particularly due to the extremely high expense, but they do help a lot on large jobs. The added rear space allows for large numbers of cables where the blocks just on regular legs don't afford as much clearance. They also make for a much neater and more organized installation than lines drawn on plywood.

Just consider these things to be the 110 equivalent of colored backboards for 66 blocks.

Actually, you are correct Tony. It was first made by Western Electric, then AT&T then Lucent, then Avaya, and presently by Commscope/Systimax.