Chapter 6 Customizing the Cisco Unified IP Phone

Creating Custom Phone Rings

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:

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 packages that support these file format requirements.

Configuring a Custom Phone Ring

To create custom phone rings for the Cisco Unified IP Phones 7970G/7971G-GE, follow these steps:

Procedure

Step 1 Create a PCM file for each custom ring (one ring per file). Ensure the PCM files comply with the format guidelines that are listed in the “PCM File Requirements for Custom Ring Types” section on page 6-4.

Step 2 Place the new PCM files that you created in the TFTP server for each Cisco Unified CallManager in your cluster. For more information, see the “Software Upgrades” chapter in Cisco IP Telephony Platform Administration Guide.

Step 3 Use an text editor to edit the Ringlist.xml file. See the “Ringlist.xml File Format Requirements” section on page 6-3for information about how to format this file and for a sample Ringlist.xml file.

 

Cisco Unified IP Phone Administration Guide for Cisco Unified CallManager 5.1 (SIP), Cisco Unified IP Phones

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Cisco Systems 7970G manual PCM File Requirements for Custom Ring Types, Configuring a Custom Phone Ring