HP NonStop G-Series User Manual

Page 280

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appearance side

The side of an HP NonStop S-series system enclosure that contains

disk

customer-replaceable units CRUs

and

power monitor and control unit (PMCU) CRUs

that do not require cables. The appearance side always has a short door and panel, or a
tall door, that is required for cooling the enclosure. The appearance side is opposite the

service side

. The appearance-side door is lockable for security purposes.

asynchronous

A mode of serial-data transmission in which characters are sent at random and the
transmission is not synchronized with a separate clock signal. That is, there is no timing
relationship between the end of one character and the start of the next. The data contains
extra bits: a start bit to signal the beginning of a byte and one or more stop bits to signal
the end of the byte. These start and stop bits allow the receiver to determine the correct
synchronization. Contrast with

synchronous

.

ATM 3 ServerNet adapter (ATM3SA)

A ServerNet adapter that provides access to Asynchronous Transfer Mode (ATM)
networks from an HP NonStop S-series server. The 3860 ATM3SA supports the ATM
User-Network Interface (UNI) specification over a 155-megabit/second (Mbps) OC-3
Sonet (Synchronous Optical Network) connection.

attachment

A file that contains information supplementing the information in an

incident report

.

attribute

A data item associated with a

resource

.

You can view all attributes in the Attributes dialog box, and you can modify certain
attributes.

authorization key

A password required to log on to a modem. If you plan to allow dial-outs to a service
provider, you must specify the authorization key of the service providers modem during
OSM configuration.

B

backplane

A board that has connectors, on one or both sides of the board, into which circuit board
assemblies plug. Backplanes are typically located behind card cages.

backup processor

A processor running the HP NonStop" operating system that communicates with the

primary processor

, allowing the processors to remain independent. A component failure

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