Exemplary embodiments of the invention relate to an optical transceiver module having a diagnostic communications link, wherein the link is configured to access diagnostic and other data contained within the transceiver controller via a backdoor interface. In one embodiment, the compensator assembly is made up of multiple elastomeric compensators and a housing. One of the essential screening components listed on the web site is a video interview of the prescreened job candidate in combination with a resume and test results, if any, for the listed job candidate. The shell wall has a shape configured to distribute compressive forces applied to the shell perimeter such that when the shell is positioned in the canal, the shell wall dynamically conforms to changes in the shape of the canal to maintain an acoustical seal between a shell exterior surface and the canal walls.