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Cisco Unified IP Phone Administration Guide for Cisco Unified CallManager 5.1 (SIP), Cisco Unified IP Phones
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Chapter6 Customizing the Cisco Unified IP Phone
Creating Custom Background Images
Step4 Save your modifications and close the Ringlist.xml file.
Step5 To cache the new Ringlist.xml file, stop and start the TFTP service by using
Cisco Unified CallManager Serviceability or disable and re-enable the “Enable
Caching of Constant and Bin Files at Startup” TFTP service parameter (located in
the Advanced Service Parameters).
Creating Custom Background Images
You can provide users with a choice of custom 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:
•List.xml File Format Requirements, page6-5.
•PNG File Requirements for Custom Background Images, page6-6.
•Configuring a Custom Background Image, page6-7

List.xml File Format Requirements

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:
Tip If you are manually creating the directory structure and the List.xml file, you must
ensure that the directories and files can be accessed by the user\CCMService,
which is used by the TFTP service.