On Tue, 29 Sep 2015, Kenneth Gartland wrote: > Hi all... > > Back in the day, we used what was known in the trade as four conductor > station wire "Z"...We also called it "JKT" or simply quad-4 station wire... > That would be "JKQ" The Bell System at one time had JKP for a pair, JKT for a triple, and JKQ for a quad.