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ND SNA 3270 Emulator II

ND 211278

  +-------------------------+
  |        ND System        |
  | +---------------------+ |
  | | ND SNA 3270         | |
  | | Emulator            | |
  | | program             | |
  | +---------------------+ |
  |       SINTRAN         | |
  |       (COSMOS)        | |
  |                       | |
  |  +-----------------+  | |
  |  | ND SNA Gateway  |  | |
  |  | module          |  | |
  |  +-----------------+  | |
  +-------------------------+
          |
          |
  +-------------------------+
  |        IBM HOST         |
  |                         |
  |       (IMS / VS)        |
  |           OR            |
  | (CICS / VS) OR (TSO)    |
  +-------------------------+

[Logo: ND Norsk Data]

Scanned by Jonny Oddene for Sintran Data © 2010.

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ND SNA 3270 Emulator II

Introduction

The ND SNA 3270 Emulator II program allows the ND system and locally attached display stations and printers to appear as a 3270 control unit with attached devices. The ND SNA 3270 Emulator II program translates the IBM® 3270 data stream from/to terminals and printers attached to the ND computers. The SNA Gateway II software module runs on a separate processor (PIOC). This off-loads much of the communications protocol handling from the ND CPU. The ND SNA 3270 Emulator II can also be run over the ND COSMOS network system. This will allow distribution of the SNA 3270 emulation to several CPUs while only one modem is connected to the IBM® host. The ND SNA 3270 Emulator II program is configured as a Physical Unit of type 2 (PU-2) in the IBM SNA network environment.

Features

  • Emulates the IBM 3270 control unit
  • Emulates 3278 model 2 display station and 3287 model 2 printer
  • Supports IMS/VS, CICS/VS or TSO®
  • Supports three different logical unit types:
    • LU-T1 for 3270 printer with SNA character stream format (SCS), LU-T2 for 3270 display units and LU-T3 for 3270 printers with data stream compatibility (3270 DSC)
  • Supports attachment of up to 65 LUs per communication line
  • May run concurrently with other ND SNA emulators on the same communication line
  • Additional local keyboard functions are available, such as HELP, PRINT, EXIT etc.
  • A total of 24 program function keys and 2 program access keys is supported
  • A special line (25th line) on the display unit is available for status and other exception messages.

Product Description

The ND SNA 3270 is implemented as a background program, running under the control of the SINTRAN III operating system. Communication between the ND SNA gateway software module and the ND SNA 3270 emulator takes place through the XMSG message communication system. For ease of operation, functional keys on the display unit can be programmed for both log-on to and log-off from the IBM host. The ND SNA 3270 Emulator II may use different kinds of display units, but the ND-NOTIS terminal exploits all functions supported by an IBM 3270 keyboard. Along with its own status code, the ND SNA 3270 Emulator II also returns status code from the ND SNA Gateway II software module. This facility greatly simplifies the fault-finding process in the SNA environment.

flowchart LR
    A[ND SNA 3270 Emulator program] --> B[ND System]
    B --> C[SINTRAN (COSMOS)]
    C --> D[ND SNA Gateway module]
    D --> E[IBM HOST (IMS / VS) or (CICS / VS) or (TSO)]

Implementation of the ND SNA 3270 Emulator II.

Requirements

  • SINTRAN III version K or later
  • ND 211277 SNA Gateway II

Documentation

Document Code
SNA Emulator II Operator Guide ND-30.114 EN
SNA Gateway II, Supervisor guide ND-30.113 EN
ND SNA Gateway II, Host Considerations ND-60.350 EN

Abbreviations

Abbreviation Description
CICS Customer Information Control System
IMS Information Management System
TSO Time Sharing Option
SNA System Network Architecture
PU Physical Unit
LU Logical Unit
PIOC Programmable Input Output Controller
XMSG X-Message 
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Tel: +47 2-620000          Tel: +49-6172-4020  Tel: +34-3-2152287 +
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Tel: +45-2-862656          tff: +353-1-427244  Tel: +1-617-366-4862
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Tel: +358-0-368811         Tel: +352-4667/8/9  Tel: +354-1-673711
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Pakistan
Tel: +92-51-861446
Thailand
Tel: +66-2-253-9682/4
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Tel: +47-2-620000
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Tel: +43-7266-5335
ND COMTEC USA
Tel: +1-316-636-5000

Information in this document is subject to change without notice and does not represent a commitment on the part of Norsk Data.