Specifications

A.17 Summary of Important Configuration Features
FDDI Configuration Capabilities A–39
A.17 Summary of Important Configuration Features
This section reviews the FDDI configuration features for the DEChub 900 FDDI net-
work modules.
A.17.1 Support for Dual Ring and Tree Connections
All DEChub FDDI modules support dual ring connections (A and B ports) and tree
connections (M and S ports) across the DEChub 900 MultiSwitch backplane, or out
of the front panel of individual FDDI network modules that are configured into a
DEChub 900 MultiSwitch.
ALL DEChub FDDI network modules support dual ring connections (A and B ports)
and tree connections (M and S ports) when configured standalone into a DEChub
ONE or DEChub ONE-MX docking station.
NOTE
The PEswitch 900TX module does not have front panel ports and requires a
DEChub ONE-MX docking station, with appropriate ModPMDs, for standa-
lone FDDI connections.
A.17.2 Support for Multiple Independent FDDI Networks
Multiple independent FDDI networks (trees and/or dual rings) are supported across
the backplane of the DEChub 900.
A.17.3 Support for Automatic Healing Patch-Around for Failed Modules
An automatic healing capability to patch around failed modules is supported for both
trees and dual rings across the backplane of the DEChub 900.
A.17.4 Support for Quick PC Trace Capability
A Quick PC Trace capability has been added to concentrators, to minimize the time
it takes to return to operation following a PC Trace. This option is selectable from
the module setup screens, whether the module is installed in a DEChub 900, a
DEChub ONE, or a DEChub ONE-MX.