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