SNAX/APC Management Programming Manual

Glossary
Glossary–2 111813 Tandem Computers Incorporated
BCPU. Backup central processing unit.
bidder. In SNA, the LU-LU half-session defined at session activation as having to
request and receive permission from the other LU-LU half-session to begin a bracket.
Contract with first speaker.
BIN. Basic information units transmitted to SNAX/APC.
BIS. Bracket initiation stopped.
BIU. Basic information unit.
BOUT. Basic information units transmitted from SNAX/APC.
bracket. In SNA, one or more chains of request units and their responses that are
exchanged between the two LU-LU half-sessions and that represent a transaction
between them.
change number of sessions (CNOS). A service provided by a set of control operator verbs
for regulating the number of sessions between a pair of logical units.
CICS. Customer Information Control System.
CNOS. See change number of sessions.
CNOS verbs. Verbs that a control operator program uses to control the number of
sessions between a pair of LUs.
command file. A text file containing a series of commands that you can run by issuing
the OBEY command in TACL or SCF, followed by the name of the text file.
Command files are sometimes referred to as OBEY files.
configuration. The definition or alteration of characteristics of an object.
control operator program. For LU 6.2, a service transaction program that describes and
controls the availability of certain resources. For example, it describes network
resources accessed by the local LU and it controls session limits between the LU and
its partners. For SNAX/APC, this is implemented in SCF.
control operator verb. One of the verbs that a control operator program uses to control
LU definitions, session activation and the number of sessions between LUs.
conversation. In SNA, a logical connection between two transaction programs using an
LU 6.2 session. Conversations are delimited by brackets to gain exclusive use of a
session. See also basic conversation and mapped conversation.
conversation state. In LU 6.2, one of a set of states that define when a specific
transaction program can issue specific conversational verb requests.
conversational verb. One of the verbs that an application program uses to implement a
conversation. These include basic conversation verbs, mapped conversation verbs,
independent verbs and Tandem-specific verbs.