By enlarging a range, in which an insertion and extraction port is opened, optical disks as stored are made easy to turn over to enable readily retrieve the optical disks as stored. The device has a stacked structure in which an electric field enhancing layer is present between a dielectric layer, which contacts an inorganic light-emitting layer, and an electrode. The buffer tubes are either helically stranded around the bundle support member or are S-Z stranded. The alignment features also support the weight of the adjacent package during solder ball reflow to maintain stack height and parallelism between packages. In other types of transceivers, the transmitter andor receiver may be forced into a low-power idle state or similar operating condition for a specified portion of the second predefined time period.