A fiber optic apparatus, comprising: a chassis defining a front side end, a rear section, a first side end, and a second side end opposite the first side end; and at least one guide system disposed within the chassis, wherein the at least one guide system is comprised of at least one module rail guide system configured to receive at least one fiber optic module from the rear section of the chassis and guide the fiber optic module toward the front side end of the chassis, at least one fiber optic equipment trays disposed in the chassis, characterized in that the at least one module rail guide system comprises a first module rail guide disposed directly on the first side end of the chassis, a second module rail guide disposed directly on the second side end of the chassis; and at least one intermediate module rail guide disposed directly on the chassis between the first module rail guide and the second module rail guide, the module rail guides forming a plurality of channels for receiving corresponding guide parts of the modules and for supporting more than one level or plane of fiber optic modules, a plurality of fiber optic equipment trays are provided to support the forward translation of the fiber optic modules, wherein the fiber optic modules attach to the fiber optic equipment trays when the fiber optic modules are moved forward within the module rail guide channels to the front side end of the chassis, wherein the fiber optic equipment trays are supported by tray guide channels of the module rail guides, wherein said tray guide channels are disposed inside the module rail guides along the longitudinal axis of the channels that support the fiber optic modules and are configured to receive corresponding extensions of the fiber optic equipment trays. a chassis defining a front side end, a rear section, a first side end, and a second side end opposite the first side end; and at least one guide system disposed within the chassis, wherein the at least one guide system is comprised of at least one module rail guide system configured to receive at least one fiber optic module from the rear section of the chassis and guide the fiber optic module toward the front side end of the chassis, at least one fiber optic equipment trays disposed in the chassis, characterized in that the at least one module rail guide system comprises a first module rail guide disposed directly on the first side end of the chassis, a second module rail guide disposed directly on the second side end of the chassis; and at least one intermediate module rail guide disposed directly on the chassis between the first module rail guide and the second module rail guide, the module rail guides forming a plurality of channels for receiving corresponding guide parts of the modules and for supporting more than one level or plane of fiber optic modules, a plurality of fiber optic equipment trays are provided to support the forward translation of the fiber optic modules, wherein the fiber optic modules attach to the fiber optic equipment trays when the fiber optic modules are moved forward within the module rail guide channels to the front side end of the chassis, wherein the fiber optic equipment trays are supported by tray guide channels of the module rail guides, wherein said tray guide channels are disposed inside the module rail guides along the longitudinal axis of the channels that support the fiber optic modules and are configured to receive corresponding extensions of the fiber optic equipment trays.