NonStop System Glossary

Point-to-Point Protocol (PPP)
A data communications protocol that provides a standard method of encapsulating Transmission
Control Protocol/Internet Protocol (TCP/IP) information over point-to-point links. OSM and TSM
use PPP to provide TCP/IP communication over a dial-up connection.
PON
Power on.
POOL object type
The Subsystem Control Facility (SCF) object type for storage pools.
port
1. A data channel that connects to other devices or computers.
2. A connector to which a cable can be attached. The system transmits and receives data or
requests through ports on ServerNet adapters and processor multifunction (PMF) customer-
replaceable units (CRUs).
3. The entrance or physical access point (such as a connector) to a computer, multiplexer, device,
or network where signals are supplied, extracted, or observed.
portable application
An application that can execute on a wide range of hardware systems from multiple manufacturers.
A portable application is a program that can be moved with little or no change in its source code
from another manufacturer’s system to a NonStop system.
portable filename character set
The set of characters that includes the Roman uppercase and lowercase letters, the Arabic numerals,
the period, the underscore, and the hyphen. The hyphen cannot be the first character of a portable
filename.
portable pathname character set
The set of characters that includes the Roman uppercase and lowercase letters, the Arabic numerals,
the period, the underscore, the slash (/), and the hyphen. The hyphen cannot be the first character
of a portable pathname.
Portable Silicon Operating System (pSOS) system product
A product of Integrated Systems Inc. that provides support for industry-standard communications
protocols based on the UNIX operating system. It is used as a compact multitasking kernel operating
system for PowerPCs and similar systems.
position ID
A character that indicates the position a NonStop Cluster Switch occupies in a network topology.
The position ID is a component of the two-character cluster switch name. The cluster switch name
includes an external fabric ID (X or Y) as the first character and a position ID as the second
character. For example, the cluster switch name X3 indicates that the cluster switch serves the
external ServerNet X fabric and occupies position 3 in the topology. Supported values for position
IDs are 1 through 9 or A through Z. Currently supported topologies (star, split-star, and tri-star) use
position IDs 1, 2, and 3.
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