Chapter 6
Customizing the Cisco Unified IP Phone
PCM File Requirements for Custom Ring Types
The PCM files for the rings must meet the following requirements for proper playback on
Cisco Unified IP Phones:
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Configuring a Custom Phone Ring
To create custom phone rings for the Cisco Unified IP Phone 7975G, follow these steps:
Procedure
Create a PCM file for each custom ring (one ring per file). Ensure the PCM files comply with the format
Step 1
guidelines that are listed in the
Place the new PCM files that you created to the Cisco TFTP server for each Cisco Unified
Step 2
Communications Manager in your cluster. For more information, see the "Software Upgrades" chapter
in Cisco Unified Communications Operating System Administration Guide.
Step 3
Use a text editor to edit the Ringlist.xml file. See the
on page 6-2
Save your modifications and close the Ringlist.xml file.
Step 4
Step 5
To cache the new Ringlist.xml file, stop and start the TFTP service by using Cisco Unified
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 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.
Cisco Unified IP Phone 7975G Administration Guide for Cisco Unified Communications Manager 7.0 (SCCP and SIP)
OL-15790-01
Raw PCM (no header)
8000 samples per second
8 bits per sample
uLaw compression
Maximum ring size—16080 samples
Minimum ring size—240 samples
Number of samples in the ring is evenly divisible by 240.
Ring starts and ends at the zero crossing.
To create PCM files for custom phone rings, you can use any standard audio editing package that
supports these file format requirements.
for information about how to format this file and for a sample Ringlist.xml file.
"PCM File Requirements for Custom Ring Types" section on page
"Ringlist.xml File Format Requirements" section
Creating Custom Background Images
6-3.
6-3
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