APPC/MVS is a communications vehicle for sending and receiving messages from one RRSF node to another. If you use it, you must configure VTAM® for APPC/MVS and implement APPC/MVS before you can use RRSF in remote mode. For information about setting up your system to use APPC/MVS and VTAM in an RRSF network, see Setting up your system to use APPC/MVS and VTAM.