•
Processor Mezzanine Board (PMB), which includes a 300-MHz CPU, system controller,
256 MB of SDRAM, and two Fast Ethernet interfaces.
•
Two LEDs, located on the craft interface above the FPC, that display the status of the
FPC. For more information about the FPC LEDs, see “T640 Craft Interface FPC LEDs
and Online/Offline Buttons” on page 24.
•
FPC online/offline button, located on the craft interface above the FPC.
Figure 27: FPC Installed in a T640 Chassis
FPC Terminology
Regardless of whether you are holding an FPC vertically or horizontally, this document
uses the same terms for all four edges of the FPC (see Figure 28 on page 69):
•
Faceplate—Edge of the FPC that has slots into which you insert the PICs
•
Connector edge—Edge opposite the faceplate; this edge has the connectors that attach
to the midplane
Copyright © 2017, Juniper Networks, Inc.68
T640 Core Router Hardware Guide