Aluminum subrack frame (19 inch/3+1RU/84HP) with integrated transfer tray (1RU) to be mounted in 19-inch racks, Accepts up to 12 compact modules 3RU/7HP with up to 288 ports on 3RU , Transfer tray to accommodate loose tube excess lengths and to store unused loose tubes, can be pulled-out backwards, with cable manager and 5 cable brackets , With protection plate for the entry section of the loose tubes , Fixing dimension: 465 mm (18.307 in.), Mounting dimension: WxHxD 19 inch x 4RU x 295 mm