Neil Croft wrote in a message to Mike Bilow:
 MB> In what situation would you use IDC connectors for network wire? 
 MB> These would ordinarily only be used inside a device such as an
 MB> Ethernet concentrator or NIC, but not outside.
 NC> Excuse me for butting in here but our AT&T 110 patch frame
 NC> uses punchdown blocks as do our RJ45 floor ports. All are
 NC> rated Cat 5.
See my message to Wes Newell on this subject.  I think there is some 
confusion about the term "IDC."  A punchdown block does not use IDC, since it 
is intended that wires be inserted using a punchdown tool which has a blade 
in it.
 
-- Mike
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