[GreenKeys] Patch Panel details

[John Lawson]

On Thu, 8 Jul 2004, Roy Morgan wrote:

> Greenkeyers,
>
>
> What was the use of the TRS-type jacks, audio/telephone circuits?
>


   In audio / telephone work, TRS plugs and jacks are used where a balanced 
circuit is to be patched - one side goes thru the 'tip' and one side goes 
thru the 'ring' - both of which are insulated from the 'sleeve', which is 
generally frame or earth ground.

   A secondary use of TRS jacks/plugs is where a live circuit must be 
interrupted with an 'insert' circuit, again w/out grounding either of the 
signal lines.

  Cheers

John  KB6SCO