The IBM® 
iSeries™ system allows frame-relay connections
to remote systems that support the Systems Network Architecture (SNA) direct
format that is defined by the Frame-Relay Forum IA 3.1. In this
format, the frame-relay packets encapsulate the SNA data.
Figure 1 shows an example of SNA direct connections to a remote iSeries system, a 5494 Remote Control Unit, and a 3745 Communications Controller on data link connection identifiers (DLCIs) 22, 23, and 24.
