# Keying the chassis

An AG 2000C has several mechanical interlocks, called keys, that prevent the board from being inserted in an incompatible chassis. Keying protects the board and other devices in the chassis from damage by ensuring that you will not accidentally insert an incompatible board in the chassis.

Before you install AG 2000C boards, configure the keying of your chassis to be compatible with the AG 2000C keying.

For detailed information on CompactPCI chassis keying, refer to the CompactPCI Computer Telephony Specification PICMG 2.5 R1.0, to Keying of CompactPCI Boards and Backplanes PICMG 2.10 R1.0, and to the IEEE 1101.10.

Warning: | To protect yourself and your equipment, use only qualified personnel to install keying. The personnel must be familiar with the CompactPCI Computer Telephony Specification PICMG 2.5, R1.0 document.

Note: An AG 2000C board does not function in a chassis that does not have a telephony backplane.

The following illustration shows how the AG 2000C board keys are configured:

AG 2000C key configuration

The following illustration shows the keying chambers in a CompactPCI chassis that you must configure or verify for an AG 2000C board. You must also key rear panel keying chambers A through F that are not shown.

Keying chamber locations on chassis front and backplane

Chambers A, D, E, and F are defined by backplane wiring and network signaling levels. Chambers B and C are manufacturer-specific.

Configure keying in the chassis as described in the following table:

Keying chambers on chassis | Configuration
--- | ---
A, B, and C (Front and rear panels) | Configure as shown in this illustration:
D, E, and F (Front and rear panels) | Configure as shown in this illustration:

P1 and P4 are installed by the backplane vendor.