The 3RU frame is a full-featured chassis that accommodates any ten Avenue modules. Modules plug into a universal motherboard so that rear modules are not needed. In addition to the ten module slots, there is a dedicated slot for the optional 5030 System Control module. One universal power supply comes with each frame. Redundant supply is optional and does not take up a slot in the frame. Touch Screen front door or plain front door are available. Plastic overlays for each module type are provided and slip over the corresponding BNCs on the backplane to identify the input and output designations on each type of module. In addition to the ten audio and video modules, the optional 5030 System Control Module adds a variety of control capabilities. Front door projects 0.875-inch/23mm. Allows minimum additional depth of 2.5-inch/65mm for cabling.