APPC/MVS provides a group of more advanced callable services that are specific to MVS and have no LU 6.2 or CPI equivalent.

Programs that use APPC/MVS advanced TP services must be link-edited with the APPC/MVS advanced TP services routine, ATBATP, and optionally, ATBCTS (if your program calls Reject_Conversation or Set_Conversation_Accounting_Information). The ATBATP and ATBCTS routines are shipped in SYS1.CSSLIB.