Digital Equipment DEC FDDIcontroller/EISA, Руководство по установке, Страница: 24 / 90

1–7 Introduction
An ANSI MIC connector on each card provides the FDDI DAS in-
terface (directly to the FDDI ring).
The fiber-optic DAS controller daughter card contains an RJ-12
connector for inserting an optional optical bypass relay (OBR).
This relay maintains connectivity of the FDDI ring in the absence
of power or during fault conditions in the node.
WARNING
!
To prevent personal injury or equipment damage, do not
insert telecommunications cabling into the optical by-
pass relay connector.
Refer to Appendix B for more information on the OBR.
1.4 LED Descriptions
The controller LEDs are used to indicate the status of the controller
and the FDDI port. The LEDs are visible on the controller’s front
panel (at the back of your computer).
Table 1–2 lists and describes possible LED states for all controller
models.
Table 1–2: LED States
LED Color Normal Description
PHY/PHY A Green On On –– PHY connection
complete
Green Flashing Flashing –– PHY connection in
progress (or no cable
attached)
Red On –– If on after system boots,
indicates broken port or Link
Confidence Test (LCT) failure;
retry loop