Cisco 7975G Administration Guide - Page 123

Chapter 6 Customizing the Cisco Unified IP Phone Creating Custom Background Images Tip Many graphics programs provide a feature that will resize a graphic. An easy way to create a thumbnail image is to first create and save the full size image, then use the sizing feature in the graphics program to create a version of that image that is 25% of the original size. Save the thumbnail version by using a different name. The PNG files for background images must meet the following requirements for proper display on the Cisco Unified IP Phone: • Full size image-320 pixels (width) X 212 pixels (height). • Thumbnail image-80 pixels (width) X 53 pixels (height). • Color palette-Includes up to 16-bit color (65535 colors). You can use more than 16-bit color, but the phone will reduce the color palette to 16-bit before displaying the image. For best results, reduce the color palette of an image to 16-bit when you create a PNG file. Tip If you are using a graphics program that supports a posterize feature for specifying the number of tonal levels per color channel, set the number of tonal levels per channel to 40 (40 red X 40 green X 40 blue = 64000 colors). This is as close as you can posterize to 65535 colors without exceeding the maximum. Configuring a Custom Background Image To create custom background images for the Cisco Unified IP Phone, follow these steps: Procedure Step 1 Step 2 Create two PNG files for each image (a full size version and a thumbnail version). Ensure the PNG files comply with the format guidelines that are listed in the "PNG File Requirements for Custom Background Images" section on page 6-4. Upload the new PNG files that you created to the following subdirectory in the TFTP server for the Cisco Unified Communications Manager: /Desktops/320x216x16 Note The file name and subdirectory parameters are case sensitive. Be sure to use the forward slash "/" when you specify the subdirectory path. Step 3 To upload the files, choose Software Upgrades > Upload TFTP Server File in Cisco Unified Communications Operating System Administration. For more information, see the "Software Upgrades" chapter in Cisco Unified Communications Operating System Administration Guide. You must also copy the customized images and files to the other TFTP servers that the phone may contact to obtain these files. Note Cisco recommends that you also store backup copies of custom image files in another location. You can use these backup copies if the customized files are overwritten when you upgrade Cisco Unified Communications Manager. OL-14640-01 Cisco Unified IP Phone 7975G Administration Guide for Cisco Unified Communications Manager 6.1 6-5