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