100basevg
     
         a 100 mbps ethernet standard specified to run
        over four pairs of category 3 utp wires known as voice
        grade, hence the "vg".  it is also called 100vg-anylan
        because it was defined to carry both ethernet and token
        ring frame types.
     
        100basevg was originally proposed by hewlett-packard,
        ratified by the iso in 1995 and practically extinct by 1998.
     
        100basevg started in the ieee 802.3u committee as fast
        ethernet.  one faction wanted to keep csma/cd in order to
        keep it pure ethernet, even though the collision domain
        problem limited the distances to one tenth that of 10baset.
        another faction wanted to change to a polling architecture
        from the hub they called it "demand priority" in order to
        maintain the 10baset distances, and also to make it a
        deterministic protocol.  the csma/cd crowd said, "this is
        802.3 -- the ethernet committee.  if you guys want to make a
        different protocol, form your own committee".  the ieee 802.12
        committee was thus formed and standardized 100basevg.  the
        rest is history.
     
        1998-06-30
     
     
see also:
mbps ethernet category 3 utp token ring frame 
hewlett-packard iso fast ethernet csma/cd collision domain 
10baset deterministic protocol