Jonathan just called me back. He said that Commscope 4 pair CAT3 cable will physically similar to CAT5 cable. There is no old style 4 pair CAT3 cable left in Commscope's inventory. 25 and higher pair count cables will remain unchanged.
Sad about the change, but, I'll learn to adapt. So far, my new style CAT3 cable has been well behaved.
