SNAX/HLS Management Programming Manual

Glossary
Glossary–4 104708 Tandem Computers Incorporated
HLSTAP. Trace Analysis Program for SNAX/HLS. HLSTAP formats SNAX/HLS
requests and responses in terms that do not require a detailed understanding of
SNAX/HLS.
HLSRDT. Constructs the resource definition table (RDT) for SNAX/HLS. The RDT is
the configuration database for SNAX/HLS. Each RDT PROFILE contains the required
SNA–specific information necessary to configure and initiate a session. This
information includes such SNA parameters as the BIND and INIT–SELF.
host. A general–purpose processor, such as an IBM 3033, that contains an SSCP, PU
type 5 logic, and one or more LUs representing different applications or application
subsystems.
ITI protocol. See interactive terminal interface protocol.
interactive terminal interface (ITI) protocol. One of the SNAX/XF and SNAX/CDF high–
level 3270 protocols that simplifies communications between an application process
and a 3270–type device. The ITI protocol supports line–at–a–time communications
with certain SNA 3270–type display stations. ITI translates the message and encloses
it in the 3270 envelope. See also CRT protocol and PRT protocol.
I/O process. A system process to manage I/O hardware. Applications use the file
system to send requests to I/O processes.
Kanji. A graphic character set consisting of symbols used in Japanese ideographic
alphabets. Each character is represented by 2 bytes.
Kanji character set. Synonym for extended graphic character set (EGCS).
Katakana. A character set of symbols used in one of the two common Japanese phonetic
alphabets, that is used primarily to write foreign words phonetically.
leased line. A connection between systems or devices that does not have to be made by
dialing. Synonymous with “nonswitched line.”
LIM. See line interface module.
line interface module. A circuit board that provides the electrical and mechanical
interface between a communication line interface processor and the communication
line.
logical unit (LU). A logical unit represents a port by which the end user gains access to
the network. A LU establishes the connections for the transmission of data between
end users in the network. LUs are associated with either application programs or a
user terminal. SNA categorizes LUs according to the type of end–user services that the
LU provides.
LU. See logical unit.
LU–LU session. The creation of a temporary data path consisting of a physical and a
logical connection between two LUs in separate domains for information exchange.
To establish a data path between two LUs in separate domains for data exchange, four
types of sessions must exist: SSCP–SSCP, SSCP–PU, SSCP–LU, and LU–LU.