Figure 1 shows
the configuration of two IBM® 
iSeries™ systems
for SNA direct frame-relay communications without a frame-relay network.
In this scenario, iSeries system SYSTEM1 connects to iSeries system SYSTEM2 through an X.21 modem eliminator. The modem eliminator operates at a speed of 1.536 Mbps. One data link connection identifier (DLCI) is defined between the two systems. Both SYSTEM1 and SYSTEM2 are defined as Advanced Peer-to-Peer Networking (APPN) end nodes. You must create the Advanced Program-to-Program Communication (APPC) controller descriptions, but the device descriptions are created automatically.