Hardware Component Overview

Figure 4: Midplane

Midplane

FPC card cage

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Physical Interface Cards (PICs)

Physical Interface Cards (PICs) physically connect the router to network media. They are housed in Flexible PIC Concentrators (FPCs); for more information about FPCs, see “Flexible PIC Concentrators (FPCs)” on page

14.(Quad-wide PICs, such as the OC-192/STM-64 SONET/SDH PIC, are exceptions. Such PICs occupy an entire FPC slot in the chassis and insert directly into the slot rather than into an FPC card carrier.)

PICs receive incoming packets from the network and transmit outgoing packets to the network, performing framing and line-speed signaling for their media type as required. PICs also encapsulate outgoing packets received from the FPCs before transmitting them. The controller ASIC on each PIC performs additional control functions specific to the PIC media type.

The router supports various PICs, including ATM, Channelized, Gigabit Ethernet, IP Services, and SONET/SDH interfaces. For complete PIC specifications, see the M160 Internet Router PIC Guide.

Packet Forwarding Engine

 

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Juniper Networks M160 manual Physical Interface Cards PICs, Midplane