Ref: 20570003
Title: Novell's Arcnet Wiring Specifications
Date: 3/29/91

Copyright 3Com Corporation, 1991.  All rights reserved.

Arcnet is a wiring method commonly used to connect Novell nodes, including
workstations and servers.  Arcnet uses token-passing star bus topology,
over RG-62/U (93-ohm) coaxial cable.  The coax can be attached
to either an active or a passive hub.  An active hub performs signal
splitting, amplification and has up to eight ports.  A passive hub is
configured to support four ports.

The maximum distance between the two nodes which are furthest apart cannot
exceed 20,000 feet.  The window of time in which the signal is allowed to
proprogate across 20,000 feet of RG-62/U cable is 31 microseconds.

Ports on an active hub which are not used do not need to be terminated;
however, on a passive hub an unused port must be terminated with a
93-ohm terminator.

Cabling Distances
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FROM                       TO                      MAXIMUM DISTANCE

Network Node               Network Node            2,000 feet
Network Node               Active Hub              2,000 feet
Network Node               Passive Hub               100 feet
Active Hub                 Active Hub              2,000 feet
Active Hub                 Passive Hub               100 feet
Passive Hub                Passive Hub             DOES NOT WORK

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Note:  Each cable connection is made by attaching the cable directly to a
node or port on the hub using a BNC connector.  T-connectors, used for thin
Ethernet cable attachments, are not used for Arcnet.

