After the alert, the originating node offers the call to the diverted-to node by sending an ACU_CONN_RQ message to the stack containing an acu_ss_notify_diversion_invoke extended data structure.
When the diverted-to node receives this request, it responds with an acu_ss_notify_diversion_ret_result extended data structure. This may be carried in an ACU_FACILITY_IN, ACU_CONN_CO, or ACU_ALERT_IN message. The message can also contain the presentation restrictions concerning the diverted-to party, as shown in the following illustration: