Juniper PIC

Juniper PIC provides physical interfaces for the router and install into FPCs which provide packet forwarding services. PICs receive incoming packets from the network and transmit outgoing packets to the network. During this process, each PIC performs framing and high-speed signalling for its media type. Before transmitting outgoing data packets, the PICs encapsulate the packets received. Each PIC is equipped with a media-specific ASIC that performs control functions tailored to the PIC’s media type.
You can install up to two PICs into each FPC. PICs are hot-removable and hot-insertable. You can install PICs of different media types on the same router as long as the router supports those PICs.