The disclosure describes an active network interface device (NID) enclosure having a modular construction that provides flexibility to a vendor and permits independent access to technician-accessible connections and subscriber-accessible connections while promoting resistance to environmental and security threats. The active NID enclosure includes an electronics enclosure and an access enclosure. The electronics enclosure contains active electronic components for conversion of data carried on a network signal carrier into services for delivery to subscriber devices. The access enclosure includes two separate access compartments, having separate covers, for independent access to either network terminals or subscriber terminals.