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DECnet SNA gateway for synchronous transport

The HP DECnet SNA Gateway for Synchronous Transport (Gateway-ST) is a Physical Unit Type 2 (PU2) gateway which consists of a dedicated hardware device, the DEC MicroServer (DEMSA or DEMSB) that connects to the IBM mainframe FEP over synchronous links, and provides DECnet users access to IBM SNA mainframe systems. HP DECnet SNA Gateway for Synchronous Transport (Gateway-ST) is similar to the HP SNA Domain Gateway-ST but without the 3270 interactive access to HP applications or the TCP/IP support.

The Gateway-ST supports a wide variety of access routines connecting OpenVMS to IBM mainframes. The Gateway-ST software runs on the DEC MicroServer (DEMSA-S*) hardware platform, which provides connectivity for up to four synchronous lines, and the DEC MicroServer-SP (DEMSB-S*), which provides a single synchronous line connection. HP DECnet SNA Gateway-ST software is down-line loaded into the DEC MicroServer or MicroServer-SP system.

The HP DECnet SNA gateway management software, installed on the load host, configures and manages the Gateway-ST. Software media and online documentation for the OpenVMS load and management host are supplied as part of the OpenVMS Alpha and VAX Software Product Libraries and Online Documentation Libraries on CD-ROM.


  • Support for remote synchronous connections to IBM mainframe systems from DECnet systems
  • 128 sessions supported on 4-line DEC MicroServer
  • 256 Kb/s throughput on 4-line DEC MicroServer
  • 32 sessions supported on 1-line DEC MicroServer-SP
  • Support for wide variety of access routines
» Software Product Description: SPD 25.C6