Compaq AlphaServer GS80 User Manual page 173

AC off state
Clock splitter
module
Cold-swap state
Console serial bus
CSB
Directory module
Distribution board
Expander cabinet
Global port
One of the system power states in which all power is
removed from the system. See also Hot-swap, Cold-
swap, and Warm-swap states.
Module that provides the system with multiple copies of
the global and I/O reference clocks.
One of the system power states in which AC power and
Vaux are present in the system, but power is removed
from the area being serviced. See also AC off, Hot-
swap, and Warm-swap states.
See CSB.
Console serial bus; a monitoring and control subsystem,
managed by the system control manager (SCM), and
which provides a command language used by the
operator.
Module on the QBB that monitors memory requests
and holds the location of the accurate copy of memory
data requested. A memory directory module is not
needed in a system with only one QBB. In a system
with more than one QBB, each QBB needs a directory
module.
The interface between the global ports of two QBBs.
A cabinet that holds additional storage shelves and PCI
boxes.
Module that plugs into a QBB that provides the
interface between the QBB and the hierarchical switch.
Glossary
Glossary-1