With one exception noted in Relationship to POST=RESP, the RPL user RH field is always set when a request or response is delivered to an application program. Therefore, setting OPTCD=USERRH is not necessary for an inbound operation. The RH field that is set is the one in the RECEIVE RPL or in the read-only RPL of the RESP, DFASY, SCIP, or NSEXIT exit routine in which the request or response is received. When the RPL RH field is set, the other RPL fields related to RH indicators (for example, those associated with STYPE and RESPOND) are also set.

The RH of the input request or response is moved directly to the RPL's user-RH field. Those indicators related to transmission services (the PI and PDI) and the currently reserved SNA indicators are set to 0, except for byte 2, bit 3, which is set as received in the input RH.