PCI FDDI Administrator's Guide

PCI FDDI
FDDI Terminology
Chapter 1 25
Single Attachment
Concentrator (SAC)
A concentrator that offers one S port (slave
port) for attachment to the FDDI network and
M ports (master port) for the attachment of
stations or other concentrators.
Single Attachment
Station (SAS)
A FDDI station that offers one S port (slave
port) for attachment to the FDDI ring.
Optical Bypass
Relay
A mechanism used to bypass a station that is
turned off or disconnected, protecting against
multiple faults on a dual ring.
Dual Homing A method of cabling concentrators and stations
that permits an alternate or backup path to the
dual ring in case the primary connection fails.
Dual Ring A FDDI network topology that uses two
redundant rings to overcome fiber-optic failures
between two nodes.
Dual Ring of Trees A topology of concentrators and nodes that
cascade from concentrators on a dual ring.
SC Connectors Duplex-style connectors where the two fiber
leads snap together to form a keyed connection.
Fiber Optic Cable A transmission medium designed to transmit
digital signals in the form of pulses of light.
Table 1-2 (Continued)