Png File Requirements For Custom Background Images; Configuring A Custom Background Image - Cisco 7971G-GE - IP Phone VoIP Administration Manual

Chapter 6 Customizing the Cisco Unified IP Phone

PNG File Requirements for Custom Background Images

Each background image requires two PNG files:
•
•
Many graphics programs provide a feature that will resize a graphic. An easy way to create a thumbnail
Tip
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:
•
•
•
Tip

Configuring a Custom Background Image

To create custom background images for the Cisco Unified IP Phone, follow these steps:
Procedure
Step 1 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
Images" section on page
Upload the new PNG files that you created to the following subdirectory in the TFTP server for the Cisco
Step 2
Unified Communications Manager:
/Desktops/320x212x12
Note
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.
OL-15299-01
Full size image—Version that displays on the on the phone.
Thumbnail image—Version that displays on the Background Images screen from which users can
select an image. Must be 25% of the size of the full size image.
Full size image—320 pixels (width) X 212 pixels (height).
Thumbnail image—80 pixels (width) X 53 pixels (height).
Color palette (applies to Cisco Unified IP Phone 7970 Series only)—Includes up to 12-bit color
(4096 colors). You can use more than 12-bit color, but the phone will reduce the color palette
to12-bit before displaying the image. For best results, reduce the color palette of an image to 12-bit
when you create a PNG file.
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 16 (16 red X 16
green X 16 blue = 4096 colors).
6-5.
The file name and subdirectory parameters are case sensitive. Be sure to use the forward slash
"/" when you specify the subdirectory path.
Cisco Unified IP Phone 7970G/7971G-GE Administration Guide for Cisco Unified Communications Manager 7.0
Creating Custom Background Images
"PNG File Requirements for Custom Background
6-5