[Freeswitch-users] ESL Inbound vs outbound for callers

Hi guys I am developing an answer machine through ESL library. If I understand correct, the inbound mode must set the caller in park before answer and listen in my client for that event. And outbound simple receive the calling event. Can you advice me what mode is better for my requirements? 90% are inbound callings that I need to answer and play a few audio files based on their CID. Thanks Normando