Juniper JUNOS - NETWORK OPERATION GUIDE REV1 Network Operation Manual page 216

JUNOS Internet Software Network Operations Guide: Hardware
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180
Verifying FPC Failure
! T320 routers—The serial number ID label is located on the center of the right
side of the FPC3 (see Figure 63). On an FPC1 and FPC2, the serial number ID
label is located near the top PIC slot.
Figure 63: T320 Router FPC Serial Number ID Label
Serial number ID label
AA1234