Cisco 8821

</Ring>
</CiscoIPPhoneRingList>
The following characteristics apply to the definition names. You must include the required DisplayName and
FileName for each phone ring type.
•
DisplayName specifies the name of the custom ring for the associated PCM file that displays on the
Ring Type menu of the phone.
•
FileName specifies the name of the PCM file for the custom ring to associate with DisplayName.
The DisplayName and FileName fields must not exceed 25 characters in length.Note
This example shows a Ringlist.xml file that defines two phone ring types:
<CiscoIPPhoneRingList>
<Ring>
<DisplayName>Analog Synth 1</DisplayName>
<FileName>Analog1.raw</FileName>
</Ring>
<Ring>
<DisplayName>Analog Synth 2</DisplayName>
<FileName>Analog2.raw</FileName>
</Ring>
</CiscoIPPhoneRingList>
The PCM files for the rings must meet the following requirements for proper playback on the phones:
•
Raw PCM (no header)
•
8000 samples per second
•
8 bits per sample
•
Mu-law compression
•
Maximum ring size = 16080 samples
•
Minimum ring size = 240 samples
•
Number of samples in the ring = multiple of 240.
•
Ring start and end at zero crossing.
To create PCM files for custom phone rings, use any standard audio editing package that supports these file
format requirements.
Custom Background Images
You can provide users with a choice of background images (or wallpaper) for the LCD screen on their phones.
Users can select a background image by accessing the Settings app and choosing Phone settings > Display
> Wallpaper 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 that the phone uses. By storing your own PNG files and editing the XML file on the TFTP
Cisco Wireless IP Phone 8821 and 8821-EX Administration Guide for Cisco Unified Communications Manager
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Cisco Unified Communications Manager Phone Configuration
Custom Background Images