Telserv Manual

Telserv Manual—427174-009
4-1
4
Subsystem Control Facility (SCF) for
Telserv
This section provides background information essential to managing the HP Telserv
subsystem interactively through the use of the Subsystem Control Facility (SCF).
Topics covered here include:

General information on SCF operation

Prerequisites

Compatibility information.

Definition and discussion of SCF objects for Telserv
SCF Operation
SCF is used to configure, control, and collect information about NonStop data
communications subsystems.
When you generate a new system, the system configuration is established for devices
such as disk drives, tape drives, and data communications lines. However, depending
on the subsystem being configured, device configuration that is performed during the
generation process typically does not supply all the information needed to configure
certain communications entities such as subdevices (terminals and printers). For data
communications subsystems, you establish these additional configuration details using
SCF.
SCF provides an operator interface to an intermediate process called the Subsystem
Control Point (SCP). SCP in turn provides an interface to the various I/O processes
performing data communications operations and services. The relationship between
these elements is illustrated in Figure 4-1
. The default SCP process, known to the
system as $ZNET, provides access for application programs, whether local or remote,
to monitor and control a communications subsystem.