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This guide provides an overview and description of the Physical Interface Cards (PICs)
supported by the Juniper Networks M120 Internet router. The PICs are described
alphabetically. Table 1 on page 3 lists the PICs supported by the M120 Internet
router by PIC family.
PICs provide the physical connection to various network media types. The PICs are
mounted on Flexible PIC Concentrators (FPCs), which are inserted into a slot in a
router. A PIC typically occupies a single slot on an FPC. 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 from
the FPCs. Each PIC is equipped with a media-specific ASIC that performs control
functions tailored to the PIC's media type. For complete information about installing
PICs and transceivers, see the PIC and Transceiver Installation Instructions located at
http://www.juniper.net/techpubs/.
Blank PICs resemble other PICs but do not provide any physical connection or activity.
When a slot is not occupied by a PIC, you must insert a blank PIC to fill the empty
slot and ensure proper cooling of the system.
M120 routers support the Type 1, Type 2, and Type 3 FPCs listed in Table 2 on page
6 and the Compact FPCs (cFPCs) listed in Table 3 on page 6. Table 6 on page 9
provides a PIC/FPC compatibility matrix for the supported PICs for the M120 router.
For a complete list of end-of-life FPCs and end-of-life Enhanced FPCs for M-series
and T-series routing platforms, see the M-series and T-series Routing Platform
End-of-Life FPC Guide located at http://www.juniper.net/techpubs/.
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M120 Internet Router PIC Guide