2. "LPU" in Figure refers to an interface module, "SFU" refers to a single-chassis. The chassis has eight LPU slots. The chassis has 16 LPU slots. Slot arrangement. The chassis has four LPU slots. 16 Service Card slots (LPU). Both LPUs and LPU slots are purple edged for easy identification. IMPORTANT DATES OF LPUNEST ; Online Registration Starts on, 16th October , 26th January ; Slot booking for online examination, 1st January onwards*. No LPUs are shipped with the chassis. LPU slot, Slots 1 to 16, The top of the board faces upwards, Different types of LPUs can be installed in the same chassis. Physical Parameters. 10 LPU slots are available on an HPE AC switch. 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. 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. 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. 3. . CE 2 Control Card slots (MPU);. 8 Service Card slots (LPU). Power supply section. The chassis has 12 LPU slots. 6 Switch Fabric slots (SFU);.