M120 Cable Management System Description; Figure 4: M120 Midplane - Juniper M120 Hardware Manual

M120 Multiservice Edge Router Hardware Guide
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M120 Cable Management System Description

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Power distribution—The router power supplies are connected to the midplane, which
distributes power to all the router components.
Signal path—The midplane provides the signal path to the FPCs, FEBs, Routing Engines,
CB, and other system components for monitoring and control of the system.

Figure 4: M120 Midplane

For chassis serial number information , see
Serial Numbers" on page 297.
M120 Router Description on page 3
M120 Router Chassis Description on page 7
The cable management system (see
semicircular plastic bobbins mounted on the front of the router below the FPC card cage.
The PIC cables pass between the bobbins and into the tray, keeping the cables organized
and securely in place. The curvature of the bobbins also helps maintain the proper bend
radius for optical PIC cables.
You can pull the cable management system up and outward to lock it into the
maintenance position. This allows you to access the lower fan tray and the front air filter.
"Displaying M120 Router Components and
Figure 5 on page 11) consists of a row of nine
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