4-pair can be used for station wiring despite the fact that Partner system phones use only 2 pairs.
All my station cabling is 4 pair. I want 2 pair just for the run from the KSU to the 66 block. In fact there are a few places where I've used the spare two pairs for another phone. My workshop is an example of that. I have one phone on my workbench and one on the computer desk. Both are 18D Euro sets. I could have used an SLT, but why not use those spare pairs.
