Removing a T1600 SCG
The router can have one or two SCGs installed. The SCGs are located in the upper rear of the chassis, above the control boards and Routing Engines. Each SCG weighs approximately 1.9 lb (0.9 kg).
A nonredundant SCG is hot-pluggable. For redundant SCGs, the master SCG is hot-pluggable. The backup SCG is hot-removable and hot-insertable if the master SCG is functioning. Removing the backup SCG does not affect the functioning of the router. Taking the master SCG offline might result in a brief loss of SONET clock lock while the backup SCG becomes the master.
To remove an SCG (see Figure 1):
- Place an electrostatic bag or antistatic mat on a flat, stable surface.
- Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to one of the ESD points on the chassis. For more information about ESD, see T1600 Preventing Electrostatic Discharge Damage.
- Press the online/offline button on the SCG faceplate and hold it down until the LED goes out (about 5 seconds).
- Loosen the captive screws on the edges of the SCG faceplate.
- Grasp the SCG by the handle on the faceplate and slide it out of the chassis.
- Place the SCG on the antistatic mat.
Figure 1: Removing an SCG
