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Hardware Overview

The JUNOS software runs on four types of Juniper Networks routing platforms: J-series, M-series, MX-series, and T-series. The routing platforms consist of the major hardware components as shown in Table 7. One or more of the major hardware components shown is used in each system.

Table 7: Major Router Hardware Components

	M-series	MX-series	T-series	J-series
Routing Engines (RE)	X	X	X	X
Control Board	X		X
Switch Interface Board (SIB)	X		X
Forwarding Interface Board (FEB)	X
Power Supply	X	X	X	X
Cooling System	X	X	X	X
Dense Port Concentrators (DPC)		X
Switch Control Board (SCB)		X
Flexible PIC Concentrators (FPC)	X		X
Physical Interface Module (PIM)				X
Physical Interface Card (PIC)	X		X

Flexible PIC Concentrators (FPCs), are each populated by PICs for various interface types. On some routing platforms, the PICs are installed directly in the chassis.

For information about specific components in your routing platform, see the hardware guide for your routing platform.

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