Communications requirements for DDM in an APPC network

Each iSeries™ server in a DDM network that is not using OptiConnect must have these communications requirements.

The APPC/APPN support or the iSeries Access Family licensed program installed and configured on the server.
At least one Systems Network Architecture (SNA) communications line connection that uses synchronous data link communications (SDLC), token-ring network, Ethernet, or X.25 protocol.

The number of sessions that can be used for DDM conversations is not limited by DDM. The maximum is determined in the same manner as for any other APPC-related communications. For parallel sessions, the session maximum is specified in the mode. For single session devices, the session maximum is always one.

iSeries servers in a DDM network that use OptiConnect must have the OptiConnect software and hardware installed. OptiConnect replaces the need for SNA communications line connections.