# Upgrading a Programmable Key Module

## Overview

You can change your 12-key PKM to a 48-key PKM. You can also add a second 48-key PKM to an existing 48-key PKM (Dual PKM).

NOTES

- To support a dual PKM, the phone must have an H2 hardware revision with main load of 9.4 and a boot load of 9.3 or later.

- When changing/adding a PKM on 5020 IP Phones, the phone must be rebooted before programming the PKM.

## Programming

To program an additional or larger PKM:

1. Multiline IP Sets form ( )

- Select the device to which the PKM is connected.

- IP Phone: change the Auxiliary Module field to the new PKM model

2. Multiline Set Keys form

- Program the additional keys.