NonStop S-Series Hardware Installation and FastPath Guide (G06.25+)

Glossary
HP NonStop S-Series Hardware Installation and FastPath Guide—529443-001
Glossary-102
signal
signal. The method by which an environment notifies a process of an event. Signals are
used to notify a process when an error that is not related to input or output has
occurred. See also Open System Services (OSS) signal and TNS/R native signal.
signal delivery. The time when Open System Services (OSS) takes the action appropriate
for a specific process and a specific signal.
signal generation. The time when an event occurs that causes a signal for a process.
signal handler. A function or procedure that is executed when a specific signal is delivered
to a specific process.
Signaling System Number 7 (SS7). The protocol used in public networks to establish
connections between switches.
signal mask. The set of signals that are currently blocked from delivery to a specific
process.
signal reference grid. A series of conductors, constructed of pure or composite metals (for
example, copper) with good surface conductivity. A superior signal reference grid is
installed on the subfloor of a computer room and connected to the raised-floor
structure to establish constant and equal potential for all equipment in the computer
room that is connected to it.
Simple Network Management Protocol (SNMP). An asynchronous request-response
protocol used for network management. SNMP originated as a means for managing
Transmission Control Protocol/Internet Protocol (TCP/IP) and Ethernet networks. OSM
and TSM can include an SNMP-compliant interface for communication between the
system console and HP NonStop™ S-series server.
single-high stack. A stack that includes a base, a frame, an HP NonStop™ S-series
system enclosure, and power shelf. Contrast with double-high stack.
single-mode fiber-optic (SMF) plug-in card (PIC). A plug-in card (PIC) that supports the
single-mode fiber-optic (SMF) interface.
single-mode fiber-optic (SMF) ServerNet cable. A fiber-optic cable that allows only one
mode to propagate. An SMF ServerNet cable has a small-diameter core for optimized
long-distance transmission. See also multimode fiber-optic (MMF) ServerNet cable.
single-wide plug-in card (PIC). A small-form-factor plug-in card (PIC) that occupies one
PIC slot within a ServerNet adapter or an HP NonStop™ cluster switch. See also
double-wide plug-in card (PIC).
sinusoidal. A waveform that can be mathematically expressed by the sine function.
SIT. See system image tape (SIT).