Both, Sam. Nowadays, I insist upon using them when using a 259A adapter. We have a lot of government and medical accounts that still have 25 pr. cables for ISDN sets.
I wish I could still get the Harris/Dracon ones. They look so much cleaner and professional to me. I only have about ten of those left and I won't part with them unless absolutely necessary.
I've also used a pair of them back-to-back on a wall to get to an electrical outlet when there isn't one where the system is installed. :shhh: , don't tell anyone that I ever did that.
