Neil Croft wrote in a message to William Hargrave:
 NC> Using Baluns over twisted pair is quite common at my place of 
 NC> work as a number of the support people use Co-ax connected 
 NC> mainframe sessions which run over the building's structured 
 NC> cabling system.
Those baluns are used in SNA token ring links, not Ethernet.
 
-- Mike
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