Optical fiber assemblies for accommodating mini duplex connectors

A fiber optic assembly for mounting in a rack, comprising:

• a chassis having a top, a bottom, and opposing sidewalls forming an interior space, the interior space accessible through at least a front opening of the chassis;
• a pair of elongate guide tracks provided in the interior space and affixed to the opposing sidewalls;
• a tray disposed in the interior space and slidably engaging the pair of elongate guide tracks such that the tray is configured to horizontally translate relative to the chassis between a first position and at least one second position, the tray having a plurality of mini duplex connector (MDC) module receiving spaces each formed between adjacent ones of guides extending upwardly from a floor of the tray;
• and
• an MDC module removably installable in one of the plurality of MDC module receiving spaces from above the tray, the MDC module having protruding module features provided near a forward end and a back end thereof for interacting with corresponding guide features formed on respective adjacent ones of the guides forming the MDC module receiving space, the protruding module features and the corresponding guide features preventing, when the MDC module is installed in the respective MDC module receiving space, horizontal translation, lateral translation, and rotational movement of the MDC module relative to the tray;
• wherein the guides and the protruding module features are inflexible;
• and
• wherein the MDC module can only be moved vertically into or out of the one of the plurality of MDC module receiving spaces.