Glossary

Knowledge of the following terms and acronyms is useful in the administration of the Netra CT 820 server.

B

basic hot swap

One of the hot swap methods. In the basic hot swap model, the hardware connection process can be performed automatically by the hardware, while the software connection process requires operator assistance. See hot swap, full hot swap

C

CompactPCI

A standard for computer boards and buses. CompactPCI is adapted from the Peripheral Component Interconnect (PCI) Specification for industrial and/or embedded applications requiring a more robust mechanical form factor than desktop PCI. CompactPCI is supported by the PCI Industrial Computer Manufacturers Group (PICMG), a consortium that uses PCI for embedded applications.

F

field replaceable unit (FRU)

From a service point of view, the smallest irreducible elements of a server. Examples of FRUs are disk drives, I/O cards, and power supplies. Note that a server, with all of its cards and other components, is not a FRU. However, an empty server is.

full hot swap

One of the hot swap methods. In the full hot swap model, both the hardware and the software connection process are performed automatically.

See hot swap, basic hot swap

H

hot swap

Implies the ability to remove and replace cards from and in a running server. See full hot swap, basic hot swap

M

midplane

The functional equivalent of a backplane. The midplane is secured to the back of the server. The CPU card, I/O cards and storage devices plug into the midplane from the front, and the rear transition cards plug into the midplane from the rear.

N

NEBS

An acronym for Network Equipment/Building System. A set of requirements for equipment installed in telco offices. These requirements cover personnel safety, protection of property, and operational continuity. "NEBS testing" involves subjecting equipment to various vibration stresses, fire, and other environmental insults. There are three levels of NEBS compliance, each a superset of the preceding. NEBS level 3, the highest level, certifies that a piece of equipment can be safely deployed in an "extreme environment." A telco central office is considered an extreme environment.

The NEBS standards are maintained by Telcordia Technologies, Inc., formerly Bellcore.

P

PICMG

Acronym for the PCI Inductrial Computer Manufacturers Group. (PCI stands for Peripheral Component Interconnect.) PICMG is the group that promulgates the CompactPCI standard.

See CompactPCI.

R

rear-access

The model of the Netra CT 820 server that is configured so that all of the cables come out from the rear of the chassis.

rear transition card

Used only on the rear access models of the Netra CT 820 server. The rear transition cards extend the connectors to the rear of the chassis.

Reliability, Availability, Serviceability (RAS)

Refers to hardware and software features that implement or improve the reliability, availability and serviceability of a server.

U

A unit of measure equal to 1.75 inches.