[GreenKeys] Teletype signalling (Loop) cable...

[Don Robert House]

Today the same stuff is available at many home improvement stores.
The new classification for JK wire is CAT 3.

Just FYI, the shielded telephone wire was called SK wire. It had only  
two conductors.
On 29 Sep 2015, at 10:02 AM, Jim Haynes wrote:

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.
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