I believe that it is two words, jack field. https://en.wikipedia.org/wiki/Patch_panel John KK9A k7lxc wrote: > As far as *jumpers*, which are 1/2" and smaller, connector choice > is driven by jackfield density. Okay, I'll bite. What's a jackfield besides a village in England? Enquiring minds want to know. Cheers,Steve K7LXC