Twisted-Pair Cable for the Distributed Management
Chain
To chain hubs together on a Distributed Management Chain, use a
“straight-through” twisted-pair LAN cable. The twisted-pair wires must be
twisted through the entire length of the cable. The wiring sequence must
conform to AT&T 258A (not USOC). See “Twisted-Pair Cable Pin
Assignments” later in this chapter for a listing of the signals used on each pin.
Note Pins 4 and 5 must be wired to a twisted pair.
Pins 1 ,2, 3, 6, 7, and 8 are not used in this application, although they may be
wired in the cable.
The maximum total length of all the extension cables in a chain is 185
meters.
blue/white
white/blue
Straight-through cable
Cables and Connectors
A-5
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