The JUNOS Internet software that operates J-series Services Routers was originally developed for Juniper Networks M-series and T-series routing platforms that support many ports, on interface cards called Physical Interface Cards (PICs). On these larger platforms, PICs are installed into slots on FPCs, and FPCs are installed into slots in the router chassis.
Because Services Routers have the same hardware and software architectures as the M-series and T-series routing platforms, PIM slots are detected internally by the JUNOS software as FPC slots, and the PIM in each slot is identified as a “PIC.” For example, in the following output, the three PIMs located in slots 0, 2, and 5 are reported as FPC 0, FPC 2, and FPC 5, and PIM 0 is reported as PIC 0:
user@host> show chassis hardware
Hardware inventory: Item Version Part number Serial number Description Chassis JN000192AB J4300 Midplane REV 02.04 710-010001 CORE99563 System IO REV 02.03 710-010003 CORE100885 System IO board Routing Engine RevX2.6 750-010005 IWGS40735451 RE-J.2 FPC 0 FPC PIC 0 2x FE FPC 2 RevX2.1 750-010355 CORE100458 FPC PIC 0 2x T1 FPC 5 REV 04 750-010353 AF04451744 FPC PIC 0 2x FE