Juniper PTX Series - Replacing a Centralized Clock Generator; Removing a Centralized Clock Generator

Table 42: Tools and Parts Required for Component
Replacement (continued)
Tool or partComponents
Phillips (+) screwdrivers, numbers 1 and 2
Electrostatic bag or antistatic mat
Blank panel (if component is not reinstalled)
SIB
Related
Documentation
Verifying the PTX5000 Packet Transport Switch Parts Received on page 63•
• Preventing Electrostatic Discharge Damage to a PTX5000 Packet Transport Switch
on page 222
Replacing a Centralized Clock Generator
1.
Removing a Centralized Clock Generator on page 158
2.
Installing a Centralized Clock Generator on page 159
Removing a Centralized Clock Generator
The packet transport switch can have one or two CCGs installed. The CCGs are located
in the upper rear of the chassis, above the control boards and Routing Engines. Each CCG
weighs approximately 1.9 lb (0.9 kg).
A nonredundant CCG is hot-pluggable. For redundant CCGs, the master CCG is
hot-pluggable. The backup CCG is hot-removable and hot-insertable if the master CCG
is functioning. Removing the backup CCG does not affect the functioning of the packet
transport switch. Taking the master CCG offline might result in a brief loss of SONET
clock lock while the backup CCG becomes the master.
To remove a CCG (see Figure 46 on page 159):
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.
Copyright © 2012, Juniper Networks, Inc.158
PTX5000 Packet Transport Switch Hardware Guide