Fiber optic cassette arrangement

A fiber optic cassette arrangement comprising:

• a body extending along a depth between a front and a rear, extending along a width between opposite first and second sides, and extending along a height between a bottom and an open top, the body defining a retention arrangement at the first side of the body, the bottom of the body defining an external channel extending along the depth of the body, the body defining a first rear port opening disposed at the rear of the body between the bottom channel and the first side of the body and a second rear port opening disposed at the rear of the body between the bottom channel and the second side of the body, and the body defining a plurality of front port openings at the front of the body;
• a multi-fiber optical adapter disposed at the first rear port opening;
• and
• a plurality of front optical adapters disposed at the front port openings.