Sending Messages and Commands

Messages and commands are represented by NMR elements, which are sent as records with the SRCB X'00'. To send an NMR element, the gateway program must set up an input file control block for the NMRs (NJESTAT field should be set to NJENMR).

After it initializes, the gateway program should issue the NJEOPEN macro to open the file control block; it should not close this file. When NMR records are available, the gateway program should issue the NJEGET macro and pack each record into a transmission buffer.