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Cisco Unified IP Phone 7975G Administration Guide for Cisco Unified Communications Manager 7.0 (SCCP and SIP)
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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
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
.
Step 2
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.
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
.
Note
If the folder does not exist, the folder gets created and the files get uploaded to the folder.
Step 3
You must also copy the customized images and files to the other TFTP servers that the phone may contact
to obtain these files.