[GreenKeys] There are 2 UPI teletypes next to each other in the news room.. why?

[Ed Sharpe Archivist for SMECC via GreenKeys]

There  are  2 UPI teletypes next to each other in the news room..  why?   
redundancy?  one  a 15  one a 20?(although  this is  tv  news  not  print). 
I  know  also  that   news  wires  had  version  for on air and version  
for  print  ? but? 
Just  curious  and in hopes some here   that  were in  close  contact with 
wire services  can   help  educate me. 
as  seen in -  real  footage not  recreation footage - used  in- 
Secrets  of the Dead   - see if reruns 
JFK: 
George Clooney narrates the Season  13 premiere, which recalls how the JFK 
assassination was reported by journalists  on the scene in Dallas and Walter 
Cronkite, who anchored CBS News' coverage from  New York. Included: the 
recollections of Dan Rather, Bob Schieffer, Marvin Kalb  and Marianne Means 
 
good jfk history.... good history of journalism  history. 
Thanks  Ed# _www.smecc.org_ (http://www.smecc.org)  
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