From: ahk@chinet.com   
      
   Stephen Sprunk  wrote:   
   >On 08-Jul-14 11:48, Adam H. Kerman wrote:   
   >>Stephen Sprunk  wrote:   
      
   >>>SLC = Subscriber Line Concentrator   
      
   >>I'm confused. What's the name of the device telephone companies used   
   >>when they weren't installing sufficient numbers of local loops to   
   >>meet a growing number of telephone subscribers, but bumped the   
   >>frequency used within the loop so it could be shared by two different   
   >>telephone subscribers?   
      
   >Frequency multiplexing was analog "pair gain".   
      
   Thanks. For some reason, I had it in my head that that's what SLC did.   
      
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