The UCS-600 rack mount chassis integrates up to twelve Universal Fiber Cassettes (UFC) for splice and terminating 144 fibers in a 3.5 U high chassis, making it ideal for high density rack mount fiber network applications. The lightweight (7 lbs) aluminum chassis has steel 19/23” reversible mounting brackets which can be placed in multiple positions for various network preferences. The durable compact design is ideal for fiber applications that require splicing and terminating up to 144 fibers in a 6.125” high chassis. Optionally, two chassis can be bracketed together for 288 fiber installations. Top and bottom rear grommets may be removed to transition buffer tubes to adjacent chassis. Available in Black or White the UCS-600 chassis provides a space saving solution for communication networks. The top front cover of the UCS-600 provides protection and easy access to the U-Guards of the Universal Fiber Cassettes. Integrated guide rails in the UCS-600 allow the telescoping feature of the cassettes. The rear hinged door is easily accessible with two thumb screws. Slack storage of buffer tubes on the inside cover the rear door of the UCS-600 provides sufficient slack of fiber for splicing and routing of fibers in to the Universal Fiber Cassettes.