RDM
Remote Device Management (RDM) is a protocol enhancement to DMX512 that allows bi-directional communication between a lighting or system controller and attached RDM compliant responder devices over a standard DMX line. This protocol allows configuration, status monitoring, and management of these devices.
Net3 DMX/RDM Gateways support 32 RDM devices per port just like DMX devices.
Compliant DMX512 and DMX512–A devices (non-RDM devices) are completely functional when RDM is present.
RDM was developed by the ESTA Technical Standards and can be referenced as ANSI/ESTA E1.20.