• Supported Platforms
• M40e Routers

• Related Topics
• M40e Chassis Description
• M40e MCS LEDs
• M40e Miscellaneous Control Subsystem (MCS) Description
• Removing an MCS from an M40e Router

Installing an MCS in an M40e Router

To install an MCS in an M40e router:

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.For more information about ESD, see Preventing Electrostatic Discharge Damage to an M Series, MX Series, or T Series Router.
2. Place one hand under the MCS to support it and grasp one of the extractor clips on the faceplate with the other hand.
3. Align the rear of the MCS with the guides inside the chassis and slide it in completely.
4. Press the extractor clip at each end of the MCS inward.
5. Verify that the green LED labeled OK on the MCS faceplate is lit. Also check the host module LEDs on the craft interface to verify that the green LED labeled ONLINE is lit for the host module to which the MCS belongs (M40e Craft Interface Description shows the LEDs).

   You can also verify correct MCS functioning by issuing the show chassis environment mcs command described in Maintaining the M40e Host Module Components.

6. Reinstall the rear component cover and tighten the thumbscrew at each corner to secure it to the chassis. For complete instructions, see Reinstalling the M40e Components into the Chassis.

   Caution: To maintain proper airflow and provide electromagnetic shielding, do not operate the router without the rear component cover in place.