Creating Custom Background Images
You can provide users with a choice of background images for the LCD screen on their phones. Users can select a background image by choosing Settings > User Preferences > Background Images on the phone.
The image choices that users see come from PNG images and an XML file (called List.xml) that are stored on the TFTP server used by the phone. By storing your own PNG files and editing the XML file on the TFTP server, you can designate the background images from which users can choose. In this way, you can provide custom images, such as your company logo.
The following sections describe how you can customize the background images that are available at your site by creating your own PNG files and editing the List.xml file:
The List.xml file defines an XML object that contains a list of background images. The List.xml file is stored in the following folder on the TFTP server:
C:\Program Files\Cisco\TFTPPath\Desktops\320x212x12
You will need to create the above directory on your TFTP server as its not created by the install, make sure that the directory and can be accessed by the user .\CCMService
1. Create or find you .png graphics, you will need two of them, a Full size image—320 pixels (width) X 212 pixels (height), and a Thumbnail image—80 pixels (width) X 53 pixels (height).
Colour up to 12-bit color (4096 colors). You can use more than 12-bit colour, but the phone will reduce the colour palette to12-bit before displaying the image. For best results, reduce the colour palette of an image to 12-bit when you create a PNG file.
2. Place the new PNG files that you created in the following folder on the TFTP server for each Cisco CallManager in the cluster:
C:\Program Files\Cisco\TFTPPath\Desktops\320x212x12
3. Now we need to create a List.xml file which contains our new .png's. the List.xml file can include up to 50 background images, so using notepad create a file which looks like :
<CiscoIPPhoneImageList>
<ImageItem Image="TFTP

esktops/320x212x12/TN-kermit.png" URL="TFTP

esktops/320x212x12/kermit.png"/>
<ImageItem Image="TFTP

esktops/320x212x12/TN-lara.png" URL="TFTP

esktops/320x212x12/lara.png"/>
</CiscoIPPhoneImageList>
Now save the files as List.xml file and place it in the directory C:\Program Files\Cisco\TFTPPath\Desktops\320x212x12
4. Now your images are ready to display on the phone by choosing Settings > User Preferences > Background Images