Information Technology Reference
In-Depth Information
Active or passive
star
Terminate any
unused ports
100 ft max for passive coax star leg
2000 ft max for active coax star leg
100-500 ft max for active twisted pair star leg
FIGURE B.9
The ARCnet star topology.
A popular alternative to ARCnet coax is to use twisted-pair wire for the trans-
mission medium. An ARCnet twisted pair network can be wired as an active star or
as a daisy-chain bus. Technically, a passive star could be used for a small number of
workstations, although the active star is more common. A twisted-pair star is wired
in the same fashion as with other networks. Workstation cables are run outward
from a wiring closet or other central location to each workstation outlet. Each cable
is terminated at the workstation with a 100-ohm resistor plug. The active star hub
includes built-in terminators.
2000 ft maximum
RG-62 COAX CABLE
93
93
BNC-T
93-ohm
Terminator
(each end)
Max. 8 nodes
per segment
Built-in
Arcnet
adapter
FIGURE B.10
The ARCnet coaxial bus topology.
 
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