DACS

["Bob Biver" <bbiver () hotmail com>]

              Digital Access and Cross Connect System. A TSI switch that 
switches DS-0 channels among DS-1 data streams. Computer controlled and 
designed for keyboard
         entry as opposed to automatic switching. There are many uses, 
including semi-automatic test boards, digital circuit concentration, trunk 
switching, and alternate
         routing. The term "DACS" was extended for DS-0/ DS-1 switching but 
has been applied to DS-1/ DS-3 switching. Many large "DACS" units include 
combined
         switching systems that allow DS-0 switching among DS-3s, always 
with demultiplexing of the DS-3 data streams. IXC and LEC carriers offer 
partitioned DACS service
         under customer control, which allows the customer to control a 
Virtual Private Network (VPN) within the carrier's network.
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