Juniper Networks P-TUNNEL - Tunnel Services Pic

PICs provide the physical connection to various network media types. The PICs are inserted into a slot in a router. You can install PICs of different media types on the same router as long as the router supports those PICs.PICs receive incoming packets from the network and transmit outgoing packets to the network. During this process each PIC performs framing and high-speed signaling 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.