DECnet Emulating SNA Using a Gateway

DEC created a DEC-to-SNA gateway, which allowed the DEC and IBM SNA devices to talk. The term gateway refers to a wide variety of networking devices that generally convert from one standard to another. As you can see, a DEC computer simply acted like an IBM computer, using the SNA networking model. DEC just wrote some software, running on a device called a gateway, which converted DECnet to SNA, and vice versa.