TCP/IP TELNET Management Programming Manual

Required Management Functions
Introduction
1–2 53474 Tandem Computers Incorporated
Once the process is created, you can add windows. Each window object corresponds
to one pseudoterminal. The term pseudoterminal is used to represent an independent
virtual terminal (commonly referred to in the TELNET protocol as a network virtual
terminal or NVT) through which a client’s or user’s data is sent to or received from the
network. The data sent or received is subject to the same transformation semantics
that are associated with a physical terminal.
Once you have added and started a window, you can execute a program by means of
that window.
Windows can be created with the ADD command or they can be added dynamically
when a connection is established. Windows created with the ADD command
generally provide a class of service. To create a class of service, you add a set of
windows with like characteristics. Programs associated with a class of service can be
run on any window belonging to that service. This flexibility allows a TELNET client
to choose a particular service instead of a specific window.
Note The dynamic addition of TELNET windows can be prevented by adding the -NOTACL option to the RUN
command. For a detailed description of the RUN command for the TELNET subsystem, see the Tandem
TCP/IP Management and Operations Manual.
You can create a maximum of 128 windows on a TELNET process. You must follow
the DSM naming conventions when adding a window object. For details on the DSM
naming conventions, see “Object Names” in Section 3, “Elements of SPI Messages for
the TELNET Subsystem.”
Required Management
Functions
Subsystem management involves monitoring and controlling the objects defined in the
subsystem, and monitoring and handling events occurring in the subsystem.
The information made available through monitoring enables you to make the
decisions needed to maintain a productive computing environment.
TELNET subsystem monitoring includes the following kinds of tasks:
Obtaining the version level of the subsystem software
Obtaining current attribute values for all the objects
Obtaining the names of windows known to the subsystem
Obtaining the current values of the statistics counters for all the objects
Obtaining information about the current states of all the objects
Obtaining information about the openers of the TELNET process
Retrieving information about events occurring in the subsystem