HP 3000 Manuals

SNA Link/iX Node Manager's Guide

SNA/X.25 Link Overview 

SNA/X.25 Linkis composed of only software:

   *   SNA Transport 

   *   Qualified Logical Link Control (QLLC) module

SNA/X.25 Link communicates with the X.25 network through the X.25
System Access software on the HP 3000, which is supported by a
Datacommunications and Terminal Controller (DTC). The QLLC module
enforces the QLLC protocol, which is a special protocol developed by IBM
to resolve differences between SDLC and X.25.  It uses qualified X.25
packets to send link control messages in a format similar to SDLC link
control messages.

Figure 1-3 shows how SNA/X.25 Link, the SNA services, and the required NS
products implement HP 3000-to-IBM host communication.


          Figure 1-3.  SNA/X.25 Link HP-to-IBM Host Communication 

Figure 1-4 shows how SNA/X.25 Link, the SNA services, and the required NS
products implement HP 3000-to-IBM AS/400 communication.


          Figure 1-4.  SNA/X.25 Link HP-to-AS/400 Communication 

Host Hardware and Software Requirements 

SNA/X.25 Link requires this IBM host hardware:

   *   An IBM System/370-compatible mainframe 
       (for example, Model 370, 303x, and 43xx).

   *   An IBM 37xx-compatible communications controller 
       that supports an X.25 NCP Packet Switching Interface (NPSI) line.

SNA/X.25 Link requires this IBM host software:

   *   MVS/SP or MVS/XA operating system.

   *   ACF/NCP network control program.

   *   ACF/VTAM telecommunications access method.

   *   X.25 NCP Packet Switching Interface (NPSI) software(version 2
       release 1 or later for the IBM 3725, and version 3 for the IBM
       3745).

For more-specific information, contact your Hewlett-Packard sales
representative.

AS/400 Hardware and Software Requirements 

SNA/X.25 Link requires this IBM AS/400 hardware:

   *   An IBM AS/400 computer system with the appropriate communications
       controller card installed.

SNA/X.25 Link requires this IBM AS/400 software:

   *   OS/400 operating system (all SNA-related software is included
       within the OS/400 operating system).

For more-specific information, contact your Hewlett-Packard sales
representative.

HP 3000 Hardware and Software Requirements 

You can run SNA/X.25 Link on any 900 Series HP 3000 computer that has at
least 32MB of real memory.  Depending on your system configuration, more
memory might be required.  Contact your Hewlett-Packard sales
representative for more information.

SNA/X.25 Link requires this HP 3000 hardware:

   *   A 900 Series HP 3000 computer system.

   *   A block mode terminal 
       that is supported by VPLUS, for use with the Node Management
       Services (NMS) NMMGR configuration manager.

Note that since SNA/X.25 Link requires the X.25 XL System Access product
and the DTC/X.25 Network Access product, the required hardware for those
products is also required by SNA/X.25 Link.  (See the Getting Started 
with the DTC manual [32098-61000] for more information.)

SNA/X.25 Link requires this HP 3000 software:

   *   HP 3000 Multiprogramming Executive with Integrated POSIX (MPE/iX)
       operating system.

   *   NS X.25 System Link.

   *   NS X.25 Network Access.

   *   OpenView DTC Manager.

MPE/iX 5.0 Documentation