Slidable telecommunications tray with cable slack management

A fiber optic telecommunications device comprising:

• a telecommunications chassis for mounting on a telecommunications frame;
• the chassis including:
• a plurality of fiber optic trays slidably mounted on the chassis, the fiber optic trays arranged in a vertically stacked arrangement, each fiber optic tray slidable between a closed storage position and an open access position, each fiber optic tray including:
• fiber optic connection locations for connecting cables to be routed through the telecommunications frame;
• and
• a cable manager coupled at a first end to the fiber optic tray and coupled at a second end to the telecommunications chassis, the cable manager configured for routing cables to and from the fiber optic connection locations, the cable manager defining a plurality of link arms that are pivotally connected to each other such that the cable manager retracts and extends with a corresponding movement of the tray as the link arms pivot with respect to each other, wherein the link arms are configured to pivot relative to each other to prevent fiber optic cables managed therein from being bent in an arc having a radius of curvature that is less than a predetermined value during the movement of the tray, each link arm defining a top wall, a bottom wall, and two oppositely positioned sidewalls, wherein each link arm defines an open portion along at least one of the sidewalls and an open portion along the top wall for receiving fiber optic cables therein, the open portions along the top wall and the at least one of the sidewalls communicating with each other.