M320 Fuses; M320 Cable Management System Description; Figure 5: Cable Management System - Juniper M320 Hardware Manual

M320 Multiservice Edge Router Hardware Guide
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M320 Fuses

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M320 Cable Management System Description

12
M320 Router Description on page 3
M320 Host Subsystem Description on page 23
M320 Cabinet Size and Clearance Requirements on page 88
The router uses fuses from the Cooper Bussman brand GMT series for the CB, SIBs, and
FPCs. The fuses are located in the rear of the midplane behind the power supply in slot
. When the fuse for a component blows, the component stops functioning even
PEM0
though it is installed correctly and the power supplies are providing power to the router.
For more information, see
replacement instructions, see
M320 Fuse Specifications on page 99
Preventing Electrostatic Discharge Damage to an M320 Router on page 318
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.

Figure 5: Cable Management System

The router; ships with an accessory box that contains four cable guards—two upper and
two lower—that you can install on the front-mounting flanges of the chassis after you
have mounted the chassis in a rack or cabinet. The cable guards protect the PIC and CIP
cables from rubbing against the front edges of the chassis.
Included with your router shipment is a clear plastic cable cover that you can attach to
slots in the cable guards without using tools. The cable cover prevents the PIC and CIP
cables from being disturbed or snagged.
"Troubleshooting the M320 Fuses" on page
"Replacing an M320 Fuse" on page
Figure 5 on page
290. For fuse
199.
12) consists of a row of nine
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