US Patent 6920274 High density optical fiber distribution frame with modules

A fiber optic telecommunications frame is provided including termination modules positioned on left and right sides of the frame. The frame further includes left and right vertical cable guides. The frame includes a horizontal passage linking the left and right panels and the cable guides. The termination modules bold fiber optic modules with front termination locations. The fiber optic modules can house couplers, such as splitters, combiners, and wave length division multiplexers. A retention mechanism retains each fiber optic module in a partially removed position from the termination module.