This read-write object sets the EDMAC role: idle(0), master(1), or slave(2). This defines the modem's role within the embedded management channel hierarchy established by cdm570FramingMode -- a master unit, typically at a hub, can forward management messages for a defined range of distant-end addresses, while a slave unit simply responds using its own fixed address, so a network's EDMAC topology requires exactly the right role assigned to each unit's position in that hierarchy. At a hub site managing several remote CDM-570 units over a single outbound carrier, the hub's unit would be set to master(1) so it can relay EDMAC management traffic to and from the remotes, each of which would be set to slave(2).