OSI/TS Management Programming Manual

Glossary
Glossary-4 056786 Tandem Computers Incorporated
Collector. An EMS process that accepts event messages from subsystems and logs them
in the event log. See EMS. Compare distributor.
Command interpreter. For OSI/AS and OSI/TS, an general term that refers to the
Tandem Advanced Command Language (TACL).
Command message. An SPI message, containing a command, sent from an application
program to a subsystem. See also SPI message. Compare response message or event
message.
Common definition. In DSM programmatic interfaces, a definition (data declaration)
used in several commands, responses, or event messages in an SPI interface to a
subsystem. See also definition.
Compatibility distributor. An EMS distributor process that filters event messages
according to fixed (rather than user-specified) criteria, obtains text for these messages
that is compatible with the operator console of Guardian 90 operating system versions
earlier than C00, and writes the text to the standard Guardian 90 console-message
destinations. See also Distributor.
Concatenation. See basic concatenation.
Conditional token. In DSM event management, a token that is sometimes, but not
always, present in a particular event message. Compare unconditional token or
Tandem internal token.
Confirm primitive. A primitive issued when a service user (entity) is to be informed
about its request. This is one of four types of service primitives. See also service
primitive.
Connection. A relationship between a service access point on one protocol stack and a
corresponding point on a different protocol stack in the desired system (this could be
the same system, or another local or remote system). Contrast association.
Connection mode. A type of communication in which all the packets of data (over the
duration of the communications session) are related and in which functions such as
error recovery and flow control are performed. Contrast connectionless mode.
Connection multiplexing. The use of multiple outgoing transport connections on a single
network connection at a single address, such as an X25AM subdevice. With OSI/TS,
this type of multiplexing can be implemented at various levels at and below the
Transport Layer. Compare passive multiplexing and address sharing.
Connection-establishment phase. The phase of an OSI connection during which the
connection is created. Compare data-transfer phase or connection-release phase.
Connection-release phase. The phase of an OSI connection during which the connection
is relinquished. This phase begins when an application initiates a release request or
when an application or the service provider aborts the connection. Compare
connection-establishment phase or data-transfer phase.