SNAX/HLS Configuration and Control Manual

Introduction
Product Overview
1–2 104705 Tandem Computers Incorporated
Figure 1-1. SNAX/HLS in a Tandem Expand Network
SCOBOLX
Requester
Pathway TCP
TAL or COBOL
Requester
HLSCOM
Pathway or
Non-Pathway
Requester
HLS3270
SNALU
SCP
\SYS1 (NonStop System)
\SYS2
(NonStop 1+ or NonStop System)
Expand
SNA Devices
(36xx/47xx)
SNA Gateways
(IMS, CICS)
SNAX/XF
SNAX/CDF
or
Remote SNA
Network
SNAX/HLS in Relation to
Other SNA Products
The Tandem SNA access methods that can be used with SNAX/HLS (SNAX/XF and
SNAX/CDF) provide two application interfaces:
The SNA3270 interface is a high-level interface that is compatible with the Tandem
command interpreter and spooler. It provides access to SNA 3270 devices.
The SNALU interface is a low-level interface that requires considerable
understanding of SNAX/XF or SNAX/CDF and SNA. It provides access to SNA
host computers and a wide range of SNA devices.
SNAX/HLS uses the SNALU interface as a building block much as the IBM high-level
SNA products (such as IMS or CICS) use the VTAM application program interface
(API). With SNAX/HLS, application programs use a simple interface to get the full
capabilities offered by the SNALU interface.
For more information on the Tandem access methods, refer to the list of suggested
manuals presented in “About This Manual.”