From: ahk@chinet.com   
      
   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?   
      
   That made modems and DSL unworkable, probably fax machines too.   
      
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