4 ms·The auto assembly plant I worked in had SNA (active, but unused) in 2006.by csours 8y agoThe auto assembly plant I worked in had SNA (active, but unused) in 2006.dfox 8y agoVarious circuit switched (ISDN) or non-IP packet switched technologies (SNA/X.25/Frame Relay) are apparently often used as backup links for various automotive EDI stuff for JIT ordering.csours 8y agoIt was the uplink to the mothership for vehicle content broadcast. JIT was local DSL.