SNAX/APC Management Programming Manual

Glossary
Glossary–10 111813 Tandem Computers Incorporated
Subsystem Control Facility (SCF). A Tandem product that is used to configure, control,
and collect information about Tandem data communications subsystems. SCF can be
used to dynamically configure and manage the entities in the SNAX/XF or
SNAX/CDF environment.
Subsystem Programmatic Interface (SPI). A Tandem product that presents a common
message–based interface used to build and decode messages for communications
between requestors on sessions. Generally used for control and enquiry functions.
See also event management service and distributed systems management.
SYSGEN. Tandem system generation program used to tailor the operating system for a
specific hardware and software configuration. SYSGEN is a subset of Install that
creates a system image only. The SYSGEN process can be divided into three phases:
configuring the system, generating the operating system, and installing the operating
system.
System Services Control Point (SSCP). The focal point within an SNA network for
managing the configuration, coordinating network–operator and
problem-determination requests, and providing directory support and other session
services for the users of the network. Multiple SSCPs, cooperating as peers, can divide
the network into domains of control, with each SSCP having a hierarchical control
relationship to the PUs and LUs within its domain.
TACL. See Tandem Advanced Command Language.
Tandem Advanced Command Language (TACL). A Tandem product that provides the user
interface to the operating system.
Tandem-specific verbs. Verbs implemented by Tandem that are not defined in LU 6.2
architecture. SNAX/APC implements two such verbs: TP-START and TP-END.
TCP. See terminal control process.
terminal control process (TCP). A process responsible for terminal management and
transaction control, provided by Tandem as part of the Pathway/TS product. A TCP
is a multithreaded process that interprets the SCREEN COBOL requester programs in
the user’s application, executing the appropriate instructions for each I/O device or
process the TCP is configured to handle. The TCP coordinates communication
between SCREEN COBOL programs and their I/O devices or processes, and with the
help of the PATHMON process, establishes links between screen programs and server
processes.
TP. See transaction program.
TPI. See transaction program instance.
transaction. An exchange between (1) a workstation and a program, (2) two
workstations, or (3) two programs, that accomplishes a particular action or result; for
example, the entry of a customer’s deposit and the updating of the customer’s
balance.