# Installing the board

To initially install a CX 2000C board equipped with a rear I/O transition board in your system, complete the following steps:

Step | Action
1 | Make sure you have attached the permanent ground, as described in Grounding the chassis.
2 | Turn off the computer and disconnect it from the power source. Remove the cover and set aside.
3 | Choose a chassis slot for the CX 2000C board. Remove the access panels to the chassis slot (both front and rear).
4 | Verify that the chassis slot has the appropriate keying, as described in Keying the chassis.
5 | Slide the rear I/O transition board into a slot at the rear of the chassis.
Warning: | Some older CompactPCI chassis may not have a rear I/O connector alignment feature. The rear I/O transition board requires this feature to allow insertion. Contact the chassis manufacturer to find out if your chassis supports this rear alignment feature. Use caution when inserting the board into the backplane mating connector.
6 | Seat the rear I/O transition board by rotating the top and bottom handles.
7 | Fasten the rear I/O transition board to the chassis with the screws on the upper and lower handles.
8 | Slide the CX 2000C board into the corresponding slot in the front of the chassis.
9 | Seat the CX 2000C board into the backplane by rotating the top and bottom handles toward each other.
10 | Fasten the CX 2000C board to the chassis with the screws on the upper and lower handles.
11 | Connect the computer to its power source.
12 | Install Natural Access as described in the Natural Access installation booklet.
13 | Connect station telephones to the board as described in Connecting to station telephones.
14 | Connect a power supply to the board as described in Using the NMS rack mount power supply chassis or Using an alternative power supply.
15 | Replace the cover, and connect the computer to its power source.

The following illustration shows how the CX 2000C board and the rear I/O transition board sit in the chassis.