HP SNA Server for OpenVMS Alpha

Software
Product
Description
PRODUCT NAME: HP SNA Server SPD 70.89.04
for OpenVMS Alpha, Version 1.3
DESCRIPTION
HP SNA Server for OpenVMS Alpha (SNA Server) is
a layered software product that allows suitably config-
ured OpenVMS Alpha systems to directly participate in
an IBM Systems Network Architecture (SNA) network-
ing environment. After installing the SNA Server and
one or more SNA access routines, users can perform
functions such as accessing IBM application programs
or other system resources, act as a 3270 display station,
exchange data files and documents with an IBM host,
and implement distributed application programs that run
between the OpenVMS Alpha and IBM systems.
Architecturally, an OpenVMS Alpha system running the
SNA Server appears to the SNA network as a Phys-
ical Unit Type 2.0 node, and is attached to the SNA
network through synchronous communications devices
or an X.25 network to an IBM 37xx Communications
Controller. The SNA server software supports a max-
imum of 255 concurrent SNA logical unit sessions per
PU. Your total session limit and line speed will depend
on the memory and communications options installed
on the Alpha CPU on which the SNA Server is run-
ning. Both local and remote (DECnet or TCP/IP) con-
nections are supported from the HP SNA Server into
the IBM SNA network, using switched or leased lines
in point-to-point or multipoint environments. HP SNA
Server for OpenVMS Alpha also supports connections
over X.25 switched virtual circuits using Qualified Logi-
cal Link Control (QLLC). The X.25 for OpenVMS Alpha
product is required for SNA over X.25 connections.
Users on one or more systems with SNA access rou-
tines can simultaneously perform functions such as ac-
cessing IBM application programs or other system re-
sources, act as a 3270 display station, perform data
transfer between HP and IBM file systems, exchange
electronic documents and mail messages, submit jobs
to IBM batch subsystems acting as a Remote Job En-
try workstation, and implement distributed, task-to-task
application programs that run between HP and IBM sys-
tems.
HP SNA Server supports connections via Synchronous
Data Link Control (SDLC). SDLC circuits can be set full
duplex. Data can be sent and received simultaneously
on full-duplex lines. This setting corresponds to DAT-
MODE=FULL in the IBM ACF/NCP PU macro.
The functions provided by the SNA server software
are comparable to those provided by the DECnet SNA
Gateway-ST product. Systems wishing access to the
SNA environment must be configured with the appro-
priate SNA access routines. For additional information
about which access routines are supported, see the Op-
tional Software section of this Software Product Descrip-
tion.
HP SNA Server for OpenVMS Alpha supports connec-
tions over X.25 switched virtual circuits (QLLC) as well
as SDLC circuits. The QLLC circuit can be configured
to use either incoming or outgoing X.25 switched vir-
tual circuits (SVCs). HP SNA Server does not sup-
port X.25 permanent virtual circuits (PVCs). HP SNA
Server requires the IBM Network Packet Switched In-
terface (NPSI) in order to use QLLC circuits. The IBM
NPSI software should be generated to support "Bound-
ary Network Node, Qualified Logical Link control" (BNN
QLLC) type-3 switched virtual circuits.
April 2007