Installing A Cable-Management Bracket On Erx-7Xx Models - Juniper E Series Hardware Manual

ERX 7.0.x Hardware Guide
5.
Figure 48: Fan Tray in ERX-7xx Model

Installing a Cable-Management Bracket on ERX-7xx Models

A cable-management bracket can be installed to accommodate cables of
different sizes on ERX-7xx models. See Figure 49.
Use two (2) #10 self-tapping screws to secure the bracket.
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Installing a Cable-Management Bracket on ERX-7xx Models

Alternate between screws when tightening them to ensure that the electrical
connectors at the back of the tray fit tightly.
(ERX-14xx model only) Push the top bezel back on the front of the system.
For wider X.21/V.35 cables, mount the bracket in the last row of perforation
holes in the chassis so that the bracket allows for maximum spacing (A).
For smaller cables, mount the bracket closer to the front of the chassis (B).