OSI/TS Management Programming Manual

Glossary
056786 Tandem Computers Incorporated Glossary-21
Subnetwork dependent convergence function. See SNDCF.
Subnetwork. One or more intermediate systems that provide relaying and through
which end open systems may establish network connections. See also intermediate
system or end system.
Subordinate names option. In DSM interfaces to Tandem data communications
subsystems, the designation that the object name given in a command stands not just
for itself but also for the names of objects at lower levels in a hierarchy. (The given
object name can stand both for itself and for the subordinate objects, or it can stand
only for the subordinate objects, depending on the value of the ZCOM-TKN-SUB
token.) When this option is present in a command, the subordinate names are implied
even though they are not given explicitly.
Subsystem. (1) The software and/or hardware facilities that provide users with access
to a set of communications services.
(2) In DSM, a program or set of processes that manages a cohesive set of objects. Each
subsystem has a process through which applications can request services by issuing
commands defined by that subsystem; in some cases, this process is the entire
subsystem. Many subsystems also have interactive interfaces.
Subsystem Control Facility. See SCF.
Subsystem Control Point. See SCP.
Subsystem ID (SSID). In DSM programmatic interfaces, a data structure that uniquely
identifies a subsystem to SPI. It consists of the name of the owner of the subsystem
(such as Tandem), a subsystem number that identifies that particular subsystem, and a
subsystem version number. The subsystem ID is an argument to most of the SPI
procedures.
Subsystem Programmatic Interface. See SPI.
Summary state. In DSM interfaces to Tandem data communications subsystems, one of
the generally defined possible conditions of an object, with respect to the management
of that object. A summary state differs from a state in two ways. First, a summary
state pertains to the management of an object, whereas a state may convey other kinds
of information about the object. Second, summary states are defined the same way for
all Tandem data communications subsystems, whereas the set of possible states differs
from subsystem to subsystem. The management programming interfaces to Tandem
data communications subsystems refer to summary states rather than to states.
Examples of summary states are STARTED, STOPPED, SUSPENDED, and
ABORTING.
Symbolic name. In DSM programmatic interfaces, a name used in programs to refer to
commonly used values, token codes, token maps, extensible structures, and other
related variables for use in management programs.
Synchronization. See synchronization point, major synchronization, or minor
synchronization.