NonStop System Glossary

byte-synchronous
A type of Open Systems Interconnection (OSI) Layer-2 protocol that uses synchronous transmission
techniques and requires a character code to define terminal and line control sequences. Data is
always transmitted in a block.
C
c7000 CG enclosure
See HP BladeSystem c7000 CG Enclosure.
c7000 enclosure
See HP BladeSystem c7000 Enclosure.
CA
See certificate authority (CA).
cabinet
The rack, front and back doors, side panels (if any), and PDUs. Cabinets contain enclosures and
other system components. A cabinet that can contain multiple enclosures is also called a modular
cabinet.
cable channel
A cable management conduit that protects the cables that run between two HP NonStop™ S-series
system enclosures in a double-high stack. Each system enclosure has two cable channels running
vertically on its service side: one on the left-hand side of the enclosure, and one on the right-hand
side of the enclosure.
cable guidepost
A cable management rod that routes cables exiting a NonStop S-series upper enclosure in a
double-high stack to prevent the cables from hanging down in front of the customer-replaceable
units (CRUs) in the base enclosure. A cable guidepost extends from the base of each cable channel.
cable support
A piece of cable management hardware that secures system cables. The cable support attaches
to the service side of a system enclosure near the bottom of the enclosure. Cable ties for securing
system cables are threaded through the cable support. The cable support also contains the group
and module ID labels and the rear group service light-emitting diode (LED).
cache
See cache memory.
cache memory
Small, fast memory holding recently accessed data designed to speed up subsequent access to
the same data. Cache memory is built from faster memory chips than main memory, and it is most
often used with processor main memory as well as network data transfer to maintain a local copy
of data. Contrast with main memory.
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