PAM Configuration and Management Manual

Introduction
PAM Configuration and Management Manual—523349-003
2-7
Interactive Interfaces
The SPI is used for building commands to, decoding responses from, and obtaining
event messages issued by the PAM subsystem. The commands, responses, and event
messages that are sent to and received from the PAM subsystem are made up of
special codes called tokens. Each token contains a particular piece of information,
such as the command number of a command or one element of an event message.
Tokens can be single values or structures consisting of several values. Some tokens,
called header tokens, are present in every command, response, and event message.
For information about using the management programming interface to PAM, see the
PAM Management Programming Manual.
Interactive Interfaces
The DSM interactive interfaces for control-and-inquiry and event management are:
•
SCF is a control-and-inquiry interface that enables a human operator to send
commands to data communications subsystems, including PAM.
•
EMS is an event-management interface that includes printing and compatibility
distributor processes that can print or display event messages for operators.
SCF Interface
SCF provides the interactive interface for PAM. SCF operates on defined objects that
correspond to physical or functional entities and that have configurable attributes and
adhere to rules of operation such as object hierarchy.
SCF Object Hierarchy
The SCF objects for PAM correspond to software components within the subsystem.
Some objects are subordinate to others. Figure 2-3 on page 2-8 shows the hierarchy of
the objects in PAM.
•
Both the PORT and MSAP object are subordinate to the LINE object.
•
The PROCESS object is superior to the LINE object but shares the LINE object’s
name.
•
The dotted lines between SNATR and LLC2 and SESSION indicate that SNAX/XF
or SNAX/APN has control over those PORT types.
•
In addition to being subordinate to the PORT object, the LLC2 and SESSION
objects can be viewed as subordinate to the SNATR MSAP object.