Abstract: A method of determining a communications channel including detecting whether a host is in a system; if a host is detected, querying the host for a channel on which to communicate and switching a channel selection logic based on a result from the query; and if a host is not detected, determining a channel on which to communicate based on the number of devices on each channel.

Abstract: A housing for a device including a first surface having a connector disposed thereon, the connector configured to mechanically couple to an oppositely mated connector on a second surface of a second device. The first surface also has a set of surface features disposed thereon, the set of surface features configured to engage an oppositely mirroring set of surface features on the second surface. When the device is stacked with the second device, the connector and the set of surface features of the first surface interact with the oppositely mated connector and the oppositely mirroring set of surface features on the second surface, respectively, to prevent vertical separation and horizontal dislocation between the device and the second device.