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Replacing the M120 Craft Interface
The craft interface is located above the FPC card cage, as shown in Front View of a Fully Configured Router Chassis. It houses the Routing Engine interface ports, which accept connections to external management and alarm-reporting devices.
The craft interface is hot-insertable and hot-removable. It weighs approximately 1.6 lb (.73 kg). When the craft interface is removed, you cannot control or communicate with the router using an external device. When you install the craft interface, allow several minutes for the display to reflect the current state of the router.
To replace the craft interface, perform the following procedures:
Removing the M120 Craft Interface
The craft interface is located on the front of the chassis above the FPC card cage. The craft interface weighs approximately 1.6 lb (0.73 kg).
To remove the craft interface (see Figure 1):
 | Note: Removing the front upper fan tray before you remove the craft interface makes it easier to grasp the craft interface as you remove it. For instructions on removing a front fan tray, see Replacing an M120 Fan Tray. |
- Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to one of the ESD points on the chassis.
- With a 3/8-inch nut driver or pliers, loosen and remove the two nuts that secure the craft interface to the chassis. Also remove the two washers located behind the nuts.
- Grasp the craft interface by the left and right flanges and carefully pull it straight out of the chassis.
Figure 1: Removing the M120 Craft Interface
Installing the M120 Craft Interface
To install the craft interface (see Figure 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.
- Align the guide pin on the back side of the craft interface with the receptacle inside the upper left corner of the chassis.
- Press the craft interface into place.
- Install a washer and retaining nut over each threaded stud on each craft interface flange.
- Tighten both retaining nuts.
- Reinstall the front upper fan tray, if it was removed.
Note: When you install the craft interface in an operating router, allow several minutes for the LEDs on the craft interface to reflect the current state of the router.
Figure 2: Installing the M120 Craft Interface
