Installing A Centralized Clock Generator - Juniper PTX5000 Hardware Manual

backup CCG does not affect the functioning of the PTX5000. Taking the primary CCG offline might
result in a brief loss of SONET clock lock while the backup CCG becomes the primary.
To remove a CCG (see Figure
1. Place an electrostatic bag or antistatic mat on a flat, stable surface.
2. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to
one of the ESD points on the chassis.
3. Press the online/offline button on the CCG faceplate and hold it down until the LED goes out (about
5 seconds).
4. Loosen the captive screws on the edges of the CCG faceplate.
5. Grasp the CCG by the handle on the faceplate and slide it out of the chassis.
6. Place the CCG on the antistatic mat.
Figure 146: Removing a CCG

Installing a Centralized Clock Generator

To install a replacement CCG (see
1. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to
one of the ESD points on the chassis.
2. Carefully align the sides of the CCG with the guides in the CCG slot.
3. Grasp the CCG by its handle and slide it straight into the chassis until it contacts the midplane.
4. Tighten the captive screws on the corners of the CCG faceplate.
5. To bring the CCG online, press the online/offline button until the green OK LED lights.
3):
Figure 147 on page 318):
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