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