Summary of LU Types and Representative IBM Products
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LU type 3
An LU type 3 is for an application program that communicates with a single
printer using the SNA 3270 data stream. Another name for this connection is
Data Stream Extended (DSE). This type of connection will not support the
SCS data stream and may be used when no host controls are to be sent to
the printer. An example of printers that may use this method of connection are
4230, 3912, 6400, 3930, and others.
LU type 4
LU type 4 is is seldom used today. It is used for (1) an application program
that communicates with a single or multiple-device data processing or work
processing workstation in an interactive, batch data transfer, or distributed
data processing environment (for example, an LU for an application program
that uses CICS/VS and communicates with an IBM 6670 Information
Distributor); or (2) logical units in peripheral nodes (for example, two 6670’s)
that communicate with each other. The data stream is the SNA Character
String (SCS) for data processing environments and Office Information
Interchange (OII) Level 2 (a precursor of DCA) for word processing
environments.
LU type 6.1
An LU type 6.1 is for an application subsystem that communicates with
another application subsystem in a distributed data processing environment.
An example of an LU type 6.1 is an application program that uses CICS/VS
and communicates with an application program that uses IMS/VS.
LU type 6.2
An LU type 6.2 supports sessions between two applications in a distributed
data processing environment. The data stream is either the SNA General
Data Stream (GDS), which is a structure-field data stream, or a user-defined
data stream. LU 6.2 session provide communication between (1) two PU type
5 nodes (host resource-owning VTAM), (2) a PU type 5 node and a PU type
2.1 node, and (3) two PU type 2.1 nodes. Examples (1) VTAM-to-VTAM
communication, or an application program that uses CICS/VS and
communicates with another application program that uses CICS/VS, (2) An
application program which uses VTAM and PSF/MVS communicating with an
IBM 3820, 3935, or PSF/2; or (3) Two AS/400’s communicating in APPC
mode.
LU type 7
An LU type 7 is for an application program and a single display workstation in
an interactive environment. An example of an LU type 7 is an application
program in an AS/400 communicating with a 5250-type terminal. The data
stream is the 5250 data stream.
Содержание 6400 Series
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Страница 3: ...6400 Line Matrix Printers S544 5640 01 Setup Guide Cabinet and Pedestal Models...
Страница 18: ...xviii Safety Notices...
Страница 86: ...86 Chapter 2 Test The Printer...
Страница 208: ...208 Chapter 4 RibbonMinder Menu...
Страница 224: ...224 Chapter 5 IEEE 1284 Parallel Interface...
Страница 234: ...234 Chapter 6 Hex Code Printout Figure 70 Sample ASCII Hex Code Printout Figure 71 Sample Code Hex Code Printout...
Страница 262: ...262 Appendix B Printing Speed...
Страница 268: ...268 Appendix C Compatibility and Limitations...
Страница 286: ...286 Appendix D Physical and Logical Unit Types...
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Страница 316: ...Copyright IBM Corp 1998 2002 174585 001A S544 5640 01 54P0515...