The serial number is located on the top of the standard control board (see Figure 1).
Figure 1: Control Board Serial Number Label

The serial number label is located at the middle of the left side of the CIP (see Figure 2).
Figure 2: CIP Serial Number Label

The serial number is located on the back of the craft interface panel, behind the alarm LEDs (see Figure 3).
Figure 3: Craft Interface Serial Number Label

The location of the serial number label varies depending on the FPC:
Figure 4: Serial Number Label on FPC

The exact location of the serial number label is different on different PICs, depending on the placement of components on the PIC board. In this example, the serial number label is located on the right side of the PIC (see Figure 5), when the PIC is vertically oriented (as it would be installed in the router).
Figure 5: PIC Serial Number Label

The serial number label is located on the left side of the power supply faceplate (see Figure 6).
Figure 6: Power Supply Serial Number Label

The serial number label is located on the right side of the top of the Routing Engine (see Figure 7).
Figure 7: Routing Engine Serial Number Label

The serial number is located on the top of the SCG, close to the midplane connector (see Figure 8).
Figure 8: SCG Serial Number Label

The serial number label is located on the left side of the SIB (see Figure 9).
Figure 9: SIB Serial Number Label
