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NETWORK CONNECTIONS
3.2.2
FDDI Station Configurations
The following terminology is explained in more detail in ANSI
X3T9.5. There are four valid FDDI station configurations:
•
SAS
- Single Attach Station
•
DAS
- Dual Attach Station
•
DAC
- Dual Attach Concentrator
•
SAC
- Single Attach Concentrator
FDDI devices are physically attached to the ring using fixed
shroud duplex (FSD) media interface connectors. Four connectors
are defined in the X3T9.5 FDDI Standard Physical Layer, (the PMD,
Physical Media Dependent, standard). They provide proper
alignment of the trunk fibers for each of the valid configurations.