CE 2 Control Card slots (MPU);. Slot arrangement. Online slot/test booking system is a web-based online scheduling system through which candidates may book the slot for appearing in the LPUNEST Candidates. 16 Service Card slots (LPU). Both LPUs and LPU slots are purple edged for easy identification. The chassis has eight LPU slots. 8 Service Card slots (LPU). LPU slot, Slots 1 to 16, The top of the board faces upwards, Different types of LPUs can be installed in the same chassis. No LPUs are shipped with the chassis. The chassis has 12 LPU slots. 6 Switch Fabric slots (SFU);. "LPU" in Figure refers to an interface module, "SFU" refers to a single-chassis. MPU slot, Slots The LPU edges, the ejector levers on an LPU, and the ejector lever seats at both sides of an LPU slot have purple marks. The chassis has 16 LPU slots. . E switch— It is the responsibility of the applicant to book their test schedule in Online Slot Management System in the given time frame if he/she has chosen that booking. IMPORTANT DATES OF LPUNEST ; Online Registration Starts on, 16th October , 26th January ; Slot booking for online examination, 1st January onwards*. Physical Parameters. Power supply section. 2. 3. The chassis has four LPU slots. 10 LPU slots are available on an HPE AC switch.