T640 Cable Management System Description; Figure 40: Cable Management System - Juniper T640 Hardware Manual

T640 Core Router Hardware Guide
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T640 Cable Management System Description

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62
The cooling system consists of the following components:
Two front fan trays—The front fan trays each contain six fans and are interchangeable.
The front fan trays cool the components installed in the front card cage (the FPCs,
PICs, CIP, and midplane).
Front air filter.
Rear fan tray—The rear fan tray contains eight fans or five blowers, and cools the
components installed in the rear card cage (the Routing Engines, Control Boards, SCGs,
and the SIBs). The rear fan tray is not interchangeable with the front trays.
Rear air filter.
Each power supply contains one fan that cools that power supply.
All fan trays and filters are hot-insertable and hot-removable.
Maintaining the T640 Air Filters on page 146
Maintaining the T640 Fan Trays on page 147
Troubleshooting the T640 Cooling System on page 168
The cable management system (see Figure 40 on page 62) consists of a row of nine
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 40: Cable Management System

T640 Router Description on page 3
T640 Chassis Description on page 13
Removing the T640 Cable Management System on page 102
Copyright © 2010, Juniper Networks, Inc.