Solved just a few days ago.

It was the stupid 5 port splitter.

Plug a phone into the server, works fine.

Plug a phone into the splitter, works fine.

Plug a phone into the cable at the other end of the splitter 175 feet away and the phone lights up, tries to initialize and says "No link to KSU."

Plug the server end in without using the splitter and it works fine.

SO, if you see "No link to KSU" just throw away the splitter, punch the wires in common and all is well.

Thanks for all the suggestions, Bracha Sarah

THE Bracha, old blond specialist in Rube Goldberg solutions.