Compaq GS320, GS160, GS80 manual Glossary

Glossary

AC off state	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.

Clock splitter module

Cold-swap state

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.

Console serial bus	See CSB.
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.
Directory module	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.
Distribution board	The interface between the global ports of two QBBs.
Expander cabinet	A cabinet that holds additional storage shelves and PCI
	boxes.
Global port	Module that plugs into a QBB that provides the
	interface between the QBB and the hierarchical switch.

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