OSI/AS Configuration and Management Manual

Glossary
OSI/AS Configuration and Management Manual—424119-001
Glossary-9
subsystem ID (SSID)
few commands itself. It provides security features, version compatibility, support for
tracing, and support for applications implemented as NonStop process pairs.
subsystem ID (SSID). In Distributed Systems Management (DSM)
programmatic interfaces,
a data structure that uniquely identifies a subsystem to the Subsystem Programmatic
Interface (SPI). It consists of the name of the owner of the subsystem (such as Compaq),
a subsystem number that identifies that particular subsystem, and a subsystem version
number. The SSID is an argument to most of the subsystem procedures.
Subsystem Programmatic Interface (SPI). In Distributed Systems Management (DSM)
, a
set of procedures and associated definition files used to define common message-based
programmatic interfaces for communication between requesters and servers—for
instance, in a management application.
summary state. In Distributed Systems Management (DSM)
interfaces to Compaq data
communications subsystems, a summary state is one of the generally defined possible
conditions of an object, with respect to the management of that object. Examples of
summary states are STARTED, STOPPED, SUSPENDED, and ABORTING.
SYSGEN. The Compaq system generation program, used to configure objects such as
devices, controllers, and input/output processes (IOPs) in a newly installed system or to
update the system when new software is released. Objects to be configured are defined
to SYSGEN in a special configuration file, which can then be coldloaded into the
system. The Compaq Open Systems Interconnection (OSI)
products are not configured
with SYSGEN, but the underlying D-series X.25 Access Method (X25AM) and Tandem
LAN Access Method (TLAM) IOPs are.
Tandem LAN Access Method (TLAM). For D4x series systems only. A Compaq product
that implements, for local area networks (LANs), the services of the Data Link Layer
and layers below. Replaced by the Port Access Method (PAM) subsystem for G06 and
later releases.
token. (1) An attribute of a Session Layer
connection, dynamically assigned to one session
service user at a time, that confers the exclusive right to perform a given function. (2) In
Distributed Systems Management (DSM)
terms, a distinguishable unit in a Subsystem
Programmatic Interface (SPI) message.
transfer syntax. In the Presentation Layer
, the definition of the exact bit patterns to be used
to convey specified kinds of information in a communication. Compare abstract syntax.
Transmission Control Protocol/Internet Protocol (TCP/IP). A set of layered
communications protocols for connecting workstations and larger systems.
transport entity. A process in the Transport Layer
that sends or receives a given transport
protocol data unit (TPDU).
Transport Layer. Layer 4 in the Open Systems Interconnection (OSI) Reference Model
. This
layer provides reliable, transparent transfer of data between end systems and ensures that
the data arrives at the correct destination. It provides reliable data transfer independent
of the underlying network service provider (NSP) process
.