SNAX/XF and SNAX/APN Event Management Programming Manual

Glossary
SNAX/XF and SNAX/APN Event Management Programming Manual—426859-001
Glossary-5
data terminal equipment (DTE)
enclosed in lists. Programs can set the current position to them and can retrieve their
values by using the NEXTCODE and NEXTTOKEN operations. See also header token.
data terminal equipment (DTE). That part of a data station that serves as a data source, data
link, or both, and provides for the data communications control function according to
protocols.
DDL. Data Definition Language.
definite response mode. A mode in which the sender waits for a response before the next
request can be sent. See also exception response mode
.
definition files. A set of files containing declarations for use in applications that call SPI
procedures. SPI has a standard definition file for Data Definition Language (DDL) and
one for each of the programming languages supporting SPI; the latter files are derived
from the DDL definition file. Likewise, each subsystem that has a token-oriented
programmatic interface has one definition file for DDL and one for each programming
language. Some subsystems—for instance, data communications subsystems—have
additional, shared definition files. See also SPI standard definitions
, SPI common
extensions standard definitions, and EMS standard definitions.
device control. A SNAX/XF feature that provides programmatic interfaces by which
application processes executing in Compaq systems can control SNA devices residing
throughout an Expand network, without an SNA host system present.
device-initiated passthrough. The process in which a device connected to a Compaq system
always initiates session establishment with a host application; the path between the
gateway LU and the device is established by SNAX/XF dynamically when the device
issues a LOGON or INIT-SELF command.
DIAGNOSING state. As defined by SCF or SPI, the state of a LINE object that is being
diagnosed using the DIAG6204 program or TMDS. This object state can be entered and
exited only by means of a diagnostic process, which a user must run explicitly.
dial-in. A switched-line feature that allows the line to prepare its hardware to receive
incoming calls.
Distributed Systems Management (DSM). A set of software tools used to manage Compaq
NonStop™ systems and Expand networks. DSM provides a uniform interface for
monitoring and controlling all components of a Compaq network. DSM tools include
the Viewpoint console application, the Subsystem Control Facility (SCF) for data
communications subsystems, the Subsystem Programmatic Interface (SPI), the Event
Management Service (EMS), the Distributed Name Service (DNS), and token-oriented
programmatic interfaces to the management processes for various Compaq subsystems.
distributor. An EMS process that distributes event messages from event logs to management
applications that request them, to console message destinations, or to a collector on
another node. See also consumer distributor
and compatibility distributor.
DLC. See data link control (DLC)
.