The TRANSMIT termination exit (INMXZ02R or INMXZ02) receives control after TRANSMIT command processing is complete -- either the data has been transmitted or some error preventing transmission has occurred -- or when the TRANSMIT command ends abnormally or terminates because of an attention interrupt. The termination exit's primary uses are to:

• Record network use. The exit can access the information required to determine the volume and direction of network traffic. You can use SMFWTM or SMFEWTM macros to write SMF records from the exit.
• Notify recipients on the same node that the transmission has been sent. The exit can issue a SEND command to users on the same node to inform them they have data to receive. The exit can examine the TRANSMIT return code to see whether data was transmitted.
• Clean up. The exit needs to perform clean-up tasks, such as freeing storage obtained for the exit-to-exit communication word, closing any files that other TRANSMIT exits opened, and freeing any data sets that they allocated.